Updated on 2022/11/26

写真a

 
TAKAGUCHI, Hiroto
 
Scopus Paper Info  
Paper Count: 0  Citation Count: 0  h-index: 5

Citation count denotes the number of citations in papers published for a particular year.

Affiliation
Faculty of Science and Engineering, School of Creative Science and Engineering
Job title
Professor
Profile
Born in Kyoto in 1970, raised in Osaka.
Graduated from Waseda University in 1995, department of Architecture. Graduated graduate school of Architecture in 1997.
Doctoral degree of Engineering in 2002.
Worked for Waseda University as an Assistant and Lecturer. Moved to Kyusyu University as a Associate Professor.

Now, Professor of Department of Architecture from 2012.

Concurrent Post

  • Affiliated organization   Global Education Center

  • Faculty of Science and Engineering   Graduate School of Creative Science and Engineering

Research Institute

  • 2020
    -
    2022

    理工学術院総合研究所   兼任研究員

Education

  •  
    -
    1997

    Waseda University   Graduate School, Division of Science and Engineering   Department of Architecture  

  •  
    -
    1995

    Waseda University   Faculty of Science and Engineering   Department of Architecture  

Degree

  • Waseda University   Doctor of Engineering

Research Experience

  • 2012
    -
    Now

    Waseda University   Faculty of Science and Engineering   Professor

  • 2007
    -
    2011

    Waseda University   Faculty of Science and Engineering   Associate Professor

  • 2004
    -
    2006

    SpecialGuestProfessor(Fulltime),KyushuUniversity

  • 2002
    -
    2003

    GuestLecture(Fulltime),WasedaUniversity

  • 1999
    -
    2001

    ReseahAssociate,WasedaUniversity

Professional Memberships

  •  
     
     

    THE JAPAN INSTITUTE OF ENERGY

  •  
     
     

    Asian Institute of Urban Environment

  •  
     
     

    City Planning Institute of Japan

  •  
     
     

    Architectural Institute of Japan

 

Research Areas

  • Architectural environment and building equipment

  • Social systems engineering

  • Environmental load reduction and remediation

  • Environmental policy and social systems

  • Environmental impact assessment

Research Interests

  • Building Environment

  • Environmental Management

  • Environmental Policy

  • Urban Environment

Papers

  • EVALUATION OF DESIGN EFFICIENCY IMPROVEMENT BY UTILIZING BIM BY PROCEEDINGS ANALYSIS

    YOSHIKAI Keiji, TSUTSUI Takahiro, TAKAGUCHI Hiroto

    Journal of Architecture and Planning (Transactions of AIJ)   83 ( 749 ) 1297 - 1303  2018.07  [Refereed]

     View Summary

    &nbsp;In recent years, the architectural design process has been becoming more and more complicated due to increase in factors to consider. Therefore, facilitation in the design process is becoming more important to reduce the task and needlessness work. As a tool to facilitate design process, BIM (Building Information Modeling) is the focus of attention recently. But, in spite of the large expectations for BIM's influence of facilitating design work, actual introduction of BIM into the building industry is very few, because of the lack of quantitative evaluation of the effectiveness of BIM. Therefore, in this research, we evaluated the effectiveness of BIM utilization on reducing reworks and improving the design flow by comparing the 7 buildings which designed with BIM and 3 buildings which designed without BIM.<br>&nbsp;As preparation, we organized meeting date and contents in chronological order from minutes information of 10 buildings. And we classified the contents into 113 design work items.<br>&nbsp;The first analysis is the evaluation using a progress chart. It is the graph showing the progress of the design progress degree. The average of the design progress degree in BIM used cases was higher at the early stage of design process than that of the BIM unused cases. So that, it made clear that many design work items are considered from the early stage of the design process in BIM used cases.<br>&nbsp;The second analysis is the evaluation of the study timing of design work items. It is the percentage value expressed as the average timing of the meeting. The study timing in BIM used cases average is 28%, and that of study timing in BIM unused cases average is 39%. which shows that utilization of BIM leads forward the meeting timing. Next, analysis of the study timing of 19 design work group shows that &ldquo;16. Structural performance&rdquo; and &ldquo;19. Estimate and make the book of confirmation request&rdquo; were studied early stage of design process. And, analysis of the study timing of 113 design work items shows that &ldquo;46. Decide the beam size&rdquo;, &ldquo;78. Study the fire protection zone&rdquo;, &ldquo;79. Design the corridors&rdquo;, &ldquo;94. Decide the floor vibration performance&rdquo;, &ldquo;103. Design the window (form/kind)&rdquo; and &ldquo;113. Make the book of construction order&rdquo; were studied early stage of design process.<br>&nbsp;The third analysis is the evaluation of rework. We clarify the type of rework occurred at each meeting. The type is classified as &ldquo;1. Rework by owner's change request&rdquo;, &ldquo;2. Returning by designer's change request&rdquo;, &ldquo;3. Rework by the change of other design work item&rdquo; and &ldquo;4. The other&rdquo;. In this research, the rework frequency of BIM used cases is 28% in average, and that of BIM unused cases is 19% in average. It shows that reworks are increased 9% by BIM using. However, in the interview survey, designer said &ldquo;Utilizing BIM, the cases that have been overlooked in the design stage and become troubles at the construction stage have been discovered and improved at the design stage.&rdquo;.<br>&nbsp;In conclusion, using BIM in the architectural design process is effective in front-loading of design work, but it becomes a factor to increase the rework of design work. However, the number of building in this research is 10, making it difficult to say statistical analysis results. Also, if the increase in the rework at the basic design stage is one that foresaw the trouble at the construction stage and avoided it, verification including implementation design is required.

    DOI CiNii

  • STUDY OF KHARTOUM SINGLE FLOOR HOUSE LAYOUTS USING GOOGLE SATELLITE HIGH RESOLUTION IMAGES(STUDY OF KHARTOUM SINGLE FLOOR HOUSE LAYOUTS USING GOOGLE SATELLITE HIGH RESOLUTION IMAGES)

    アウダラマジッド モハメド, 高口 洋人

    日本建築学会環境系論文集   83 ( 744 ) 205 - 213  2018.02  [Refereed]

    Authorship:Last author

     View Summary

    &nbsp;This paper aims to determine the most common features of both the layout and the building materials of the single floor house in Khartoum -the capital of Sudan- using different methodologies. The results were then used to create a standard testing model to be utilized by researchers in all fields, especially, researches in the field of energy simulation, environmental design, etc. Google High resolution images were used to determine the layouts by studying the location of the visible roof parapets of each house. Three small neighborhoods were randomly chosen from the three cities of Khartoum state (Khartoum, Bahri, and Omdurman), each neighborhood contained around 350 houses. Additionally, one large neighborhood (about 15000 houses) was selected in an old third-class area in Khartoum state to test the various house layouts, in order to estimate the commonness of a specific uniform layout amongst the other layout patterns. Afterwards, the building materials and space dimensions were determined by surveying a random sample of 96 houses chosen from the large neighborhood. These 96 houses were built in accordance to the uniform pattern layout subject of this research. The results show that the uniform pattern layout is clear in about 39.75% of the total samples, and the common dimensions (length, width and height) of the room, hall, saloon, and the kitchen are (4.4m &times; 4.2m &times; 3.8m), (5.7m &times; 3m &times; 3.2m), (7.4m &times; 3.2m &times; 3.8m), and (4.4m &times; 4.2m &times; 3.8m) respectively. The most used materials are brick for the walls, local materials for the roofs, steel for doors, and steel frame and glass panels for the windows in 88%, 38%, 76%, and 82% of the cases respectively.

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  • 外断熱改修のための不燃外断熱システムの開発

    角尾 怜美, 清瀬 英人, 高口 洋人

    日本建築学会技術報告集   ( 56 ) 281 - 281  2018.02  [Refereed]

    CiNii

  • 新虎通りにおけるCVMを用いた街路樹事業の費用便益分析

    木原 己人, 伊原 さくら, 谷 葉留佳, 高口 洋人

    日本建築学会技術報告集   ( 54 ) 687 - 687  2017.06  [Refereed]

    CiNii

  • COST-BENEFIT ANALYSIS OF THE ROADSIDE TREE PROJECT BY USING CONTINGENT VALUATION METHOD AT SHINTORA STREET

    KIHARA Tatsuto, IHARA Sakura, TANI Haruka, TAKAGUCHI Hiroto

    AIJ Journal of Technology and Design   23 ( 54 ) 687 - 690  2017  [Refereed]

    Authorship:Last author

     View Summary

    In this study, I perform a cost-benefit analysis of the roadside tree project in the planning stage, by using the method of CVM. In CVM survey of trees project model in the Toranomon Street, I used two types of survey. (One shows the results of the thermal environment simulation, one does not) There was no difference between the result of the survey. As a result of the cost-benefit analysis, cost-benefit ratio from seven years after the effect was presented in the questionnaire begins obtained are more than 1, could be evaluated the roadside tree project is that it is reasonable.

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    1
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  • Development of a Simulator for Prediction of Urban Environmental Loads : Parameter Identification Method in Multiplier and Verification of Model

    上野 貴広, 住吉 大輔, 赤司 泰義, 高口 洋人

    都市・建築学研究 : 九州大学大学院人間環境学研究院紀要   ( 31 ) 19 - 28  2017.01  [Refereed]

     View Summary

    We made a long-term prediction simulator of CO_2 emissions from 1975 to 2050 for Fukuoka City with system dynamics. In this simulator, CO_2 emissions are calculated by multiplying CO_2 emission units with amounts of activities. In our past research, it took many hours to make the model because we manually adjust multiplying functions of the model. Therefore we develop a program to adjust every multiplying function of the model for reducing the simulator making hours. Moreover, we compared actual values and calculated values of the simulator by using multiplying functions that were identified by the program, and did accuracy verification of the program.

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  • ENERGY CONSUMPTION SURVEY IN A HIGH-RISE UNIVERSITY:Comparison of energy consumption before and after the Great East Japan Earthquake

    ZHANG Jian, XU Lei, NAKAJIMA Yusuke, TAKAKUCHI Hiroto

    Journal of Environmental Engineering (Transactions of AIJ)   79 ( 699 ) 451 - 458  2014  [Refereed]

     View Summary

    The energy supply in Japan faces challenges after the Great East Japan Earthquake. The electricity consumption and the energy consumption for cooling before and after this earthquake in a high-rise university with BEMS is investigated. Compared with the energy consumption in 2010, about 22% of the electricity consumption and 20% of the energy consumption for cooling is cut down in 2011. According to the hourly data for lighting, electric outlets, cooling systems, the load patterns for different energy consumption are studied. The results show that the load patterns before and after the earthquake are quite similar. Furthermore, the difference of energy consumption for cooling in similar climate conditionings in these two summers is pointed out, which illustrates the effectiveness of energy saving methods adopted. Compared with the contracted electricity demand, 15% of the peak electricity demand is cut down in the summer of 2011.

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  • VISUALIZATION AND CASE STUDY OF OFFICE BUILDING DESIGN PROCESS USING DSM ANALYSIS

    TAKEKAWA Kei, OBA Daisuke, TAKAGUCHI Hiroto

    AIJ Journal of Technology and Design   20 ( 45 ) 747 - 750  2014  [Refereed]

     View Summary

    In recent years, design process has become more complicated due to increase in factors to consider. Thus, a need for design process facilitation is apparent in architectural design. We first specify the design process of a basic office building by using DSM, an analytical method. We then analyze reworks occurred in design process in detail by conducting 4 case studies. Finally, we find the potential rework rate for each case, which was 28.4%&ndash;38.1% in general office buildings. Meanwhile, the rate was only 17.9% for the environmental office building.

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  • ENERGY CONSUMPTION AFTER GREAT EARTHQUAKE OF EAST JAPAN:Development and analysis of DECC (Data-base for Energy Consumption of Commercial building) Part 2

    TAKAGUCHI Hiroto, YODA Hirotosh, SAKAMOTO Yuzo, BOGAKI Kazuaki, MURAKAMI Shuzo, YAMAMOTO Takaharu, KAMETANI Shigeki, HANZAWA Hisashi, YOSHINO Hiroshi, ASANO Yoshiharu, OKUMIYA Masaya, SHIMODA Yoshiyuki, MURAKAWA Saburo

    Journal of Environmental Engineering (Transactions of AIJ)   79 ( 703 ) 795 - 801  2014  [Refereed]

     View Summary

    Because of the lack of power in Tokyo and Tohoku due to Tohoku-Pacific Ocean Earthquake that occurred on March 11, 2011, ordinance of electric power usage restrictions were triggered for the first time in 37 years. Large consumers of more than 500kW electric power contract were asked to reduce power consumption of 15%. Furthermore, since the power plant was stopped across the country, power-saving and energy-saving measures have been implemented in almost all over Japan. We conducted the investigation on the power saving conditions in the summer of 2011, in order to grasp and analyze the actual condition of power saving which commercial buildings performed. When we compared the energy consumption of the total from April to September of 2011 with 2010, about Office building, Kanto Area showed the biggest reduction of 21.4%, and when we compared the peak load of electricity of 2011 with 2010, the large office building in Tohoku Area showed the biggest reduction of 23.6%.

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  • RESEARCH ON MITIGATION METHODS OF ENERGY CONSUMPTION INCREASE OF CAMBODIAN HOUSES:- Proposal of energy conservation model houses -

    MIYAZAKI Keiko, YAMAMOTO Yuki, WASHIYA Satoshi, TAKAGUCHI Hiroto

    Journal of Environmental Engineering (Transactions of AIJ)   77 ( 673 ) 193 - 202  2012  [Refereed]

     View Summary

    South-east Asian countries are now experiencing remarkable economic growth in recent years. In hot and humid countries like Cambodia, air-conditioning equipments are becoming widely accepted. Because of the lack of fundamental data on Cambodian lifestyle and energy consumption, this paper first studies and estimates the amount of energy consumption of Cambodian houses in urban areas by questionnaire method, targeting the families living in Phnom Penh and Siem Reap. Then the amount of energy consumption of Cambodian houses is estimated by simulation analyses on typical two types of model houses. And the paper simulates many methods to decrease the amount of energy consumption, and proposes the most effective and realistic methods to mitigate the rapid increase of energy consumption in south-east Asian countries.

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    2
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  • COMPARISON OF ENERGY CONSUMPTION PER UNIT FLOOR AREA AMONG RETAIL CATEGORIES BASED ON THE DATABASE OF ENERGY CONSUMPTION FOR COMMERCIAL BUILDINGS (DECC)

    YAMAGUCHI Yohei, HANZAWA Hisashi, YOSHINO Hiroshi, ASANO Yoshiharu, OKUMIYA Masaya, MURAKAWA Saburo, YODA Hirotoshi, SUZUKI Yusuke, YAMAZAKI Masato, SHIMODA Yoshiyuki, MURAKAMI Syuzo, BOGAKI Kazuaki, MATSUNAWA Katashi, KAMETANI Shigeki, TAKAGUCHI Hiroto

    Journal of Environmental Engineering (Transactions of AIJ)   77 ( 681 ) 889 - 897  2012  [Refereed]

     View Summary

    Authors gathered and investigated annual energy consumption of 4,194 retail facilities. The retail facilities were classified by the retail categories into department store, general merchandise store, grocery store, garment store, household merchandise store, home center, drag store, convenience-store, shopping center and specialized store. The average of total floor area and annual primary energy consumption per unit floor area were compared among the retail categories. Except the combination between department store and shopping center, these retail categories showed a significant difference in the total floor area and/or annual energy consumption per total floor area. This result implies that classification by retail category contributes to understand the characteristics of energy consumption.

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    3
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  • EVALUATION ON ENERGY CONSUMPTION CHARACTERISTICS AND EFFECT OF ENERGY CONSERVATION MEASURES IN UNIVERSITY CAMPUS BUILDINGS IN NORTHERN CHINA

    SU Yuan, TAKAGUCHI Hiroto, WANG Fulin

    Journal of Environmental Engineering (Transactions of AIJ)   77 ( 677 ) 605 - 614  2012  [Refereed]

     View Summary

    This paper compares the effect of energy conservation measures between two buildings on university campus in northern China. The paper also presents for the first time the detailed hourly energy consumption characteristics and composition of such buildings in this area for the year of 2010. Compared in buildings, &lsquo;A&rsquo; is near to the average electricity consumption unit of the investigated buildings while &lsquo;B&rsquo; includes energy conservation measures. Firstly, variation of heating/cooling load and electricity consumption unit has been analyzed. Then averaged electricity consumption unit with different usage like air conditioning system, lighting were examined at different periods. The indices of daily electricity consumption were figured out. Furthermore, energy conservation measures were evaluated to discuss the energy conservation effect.<br>Based on the investigation results, the heating load index per floor area of building B was found to be 40% of building A while the cooling load index per floor area was 30% of A. Air conditioning system accounted for 64.8% in building A and electrical socket accounted for 61.8% in building B of the total electricity consumption. Average daily electricity consumption ratio of building B is 5.1% higher than building A indicating possibility of energy conservation in building A. Finally, from the calculation based on actual data and simulation results, it is worth noting that overall energy consumption in building A can be reduced by 38% and individually heating and cooling loads can be cut down 57.8% and 61.5% respectively.

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    7
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  • ANALYSIS OF ENERGY CONSUMPTION STRUCTURE OF A SCIENCE AND ENGINEERING UNIVERSITY CAMPUS IN SOUTHERN CHINA

    SU Yuan, TAKAGUCHI Hiroto, YAN Junwei

    Journal of Environmental Engineering (Transactions of AIJ)   77 ( 675 ) 399 - 407  2012  [Refereed]

     View Summary

    This paper presents in depth analysis of the actual energy consumption structure of a science and engineering university campus in southern China. It also clarifies for the first time the hourly energy consumption characteristics of such campus buildings in this area. Firstly, the measurement meters were installed on the power circuits of 11 different buildings in the campus to obtain hourly end-user energy consumption data from Sep.1st 2009 to Aug.31st 2010. Then examination of energy consumption unit according to the different buildings has been analyzed base on the measured data. Furthermore, the energy consumption of buildings with different usages has been evaluated; the analysis was performed for different days and different load periods. Finally, a detail of energy consumption unit was discussed and constructed based on it.<br> From the analysis, variation of daily energy consumption unit structure of different usage buildings and the whole campus is clearly indicated. The energy consumption of the research laboratory buildings accounted for 58% of the whole campus' energy consumption. The average daily energy consumption unit of the library was the highest. Among the proportion of the total energy consumption for the whole campus, the cooling consumption accounted for 52% with 72.18 MJ/(m2&bull;a), electricity consumption of lighting and electrical socket accounted for 23% with 32.01 MJ/(m2&bull;a). The maximum value of hourly average electricity consumption unit for the whole campus in each month was recorded at 12:00 Oct. 2009 with 24.08 kJ/(m2&bull;h) and the maximum value of hourly average cooling consumption unit was recorded at 16:00 Oct. 2009 with 71.14 kJ/(m2&bull;h) respectively. The energy consumption unit in different load period was listed to indicate which building and which period consumed more energy. In particular, this study we aim to find out peak energy unit of the different buildings, in order to make a proposal for energy conservation measures to reduce peak energy amount of the whole campus to the greatest possible extent.

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  • DEVELOPMENT AND ANALYSIS OF DECC (DATA-BASE FOR ENERGY CONSUMPTION OF COMMERCIAL BUILDING):Part 1&emsp;Development on basic database of DECC

    TAKAGUCHI Hiroto, MURAKAWA Saburo, YODA Hirotoshi, SAKAMOTO Yuzo, BOGAKI Kazuaki, MURAKAMI Shuzo, IZUTSU Shimpei, WASHIYA Satoshi, KAMETANI Shigeki, HANZAWA Hisashi, YOSHINO Hiroshi, ASANO Yoshiharu, OKUMIYA Masaya, SHIMODA Yoshiyuki

    Journal of Environmental Engineering (Transactions of AIJ)   77 ( 678 ) 699 - 705  2012  [Refereed]

     View Summary

    The number of commercial buildings in Japan is estimated over 10 million and these buildings are considered to emit large amounts of CO2. However, environmental load for commercial buildings has not been fully researched and those researches done in the past have focused on limited subjects or areas in Japan. This research aims to develop a nationwide database on CO2 emission and water usage of commercial buildings which can be used by researchers, policy makers and business people.<br>This paper reports the outline of this database and the specific primary energy consumption, which was developed centrally by 33 universities. The data was collected through questionnaire surveys which was conducted between 2007 and 2009, and a total of 40,085 building data was collected, of which 27,902 were disclosed. The collected data was divided into 23 uses and primary energy consumption intensity for the disclosed database were calculated by areas, gloss floor area and year of completion.

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    12
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  • OPERATION RESULTS OF DHC PLANTS IN EXPO 2005

    NAKAJIMA Yusuke, YAMADA Masaya, TAKAGUCHI Hiroto

    Journal of Environmental Engineering (Transactions of AIJ)   73 ( 624 ) 237 - 243  2008.02  [Refereed]

     View Summary

    EXPO2005 was held from Mar. 25 to Sep. 25 in 2005. In this EXPO Nagakute area, air-conditioning energy were supplied from five DHC plants. We had recorded air-conditioning energy, gas, power, and upper and lower water consumption in this area. In this study, we chiefly analyze the operation results of these DHC plants. As a results, main three plants had tended to operate in a lot of numbers of the refrigerating machine for the load. In that situation, plant No. 6 which was subdivided to four showed better COP value, and importance of quipment composition of plants was confirmed. And, it was problem that excessive load calculation of enterprise pavilions influenced the plant load factor decrease.

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  • Detailed research for energy consumption of residences in Northern Kyushu, Japan

    Yasuto Takuma, Hiroyuki Inoue, Futoshi Nagano, Akihito Ozaki, Hiroto Takaguchi, Toshiyuki Watanabe

    ENERGY AND BUILDINGS   38 ( 11 ) 1349 - 1355  2006.11  [Refereed]

     View Summary

    Energy consumption in residential sector has been increasing year by year since 1965. To improve this situation, it is necessary to reconsider the traditional energy supply systems. Distributed power source systems, such as photovoltaic (PV) system and micro co-generation system, are considered as solutions to current residential energy problems. In order to utilize these systems effectively, understanding detailed energy consumption of residences is required. The purpose of this research is to clarify detailed energy consumption; seasonal and annual energy consumption classified by uses, the effect of energy-saving apparatus and heating demand of residences located in the north of Kyushu, Japan. Major results are as follows: (1) energy consumption for hot water supply is larger than ones for lighting, air-conditioning and cooking among most houses, in the north part of Kyushu, (2) PV system is quite effective to save energy of residential buildings, and (3) Heat demand and electric power demand of residences are clarified by detailed measurement for installing individual dispersed power source system, some houses show high thermoelectricity ratio enough to move micro co-generation system effectively, even at present. (c) 2006 Elsevier B.V. All rights reserved.

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  • EFFECTIVE OPERATION METHODS AND ENERGY CONSERVATION EFFECT OF HOUSING POLYMER ELECTROLYTE FUEL CELL CO-GENERATION SYSTEMS : Installation effect of distributed power and heat source system for housing (Part 1)

    KUROKI Hiroshi, SHIMIZU Shotaro, TAKAGUCHI Hiroto, WATANABE Toshiyuki

    Journal of Environmental Engineering (Transactions of AIJ)   71 ( 610 ) 67 - 73  2006  [Refereed]

     View Summary

    This paper presents the effective operation methods and the regional energy conservation effects of housing Polymer Electrolyte Fuel Cell Co-Generation System (PEFC-CGS). We built the model-based simulation program to calculate the energy budget in a case that PEFC-CGS was introduced to detached houses considering specifications of a real PEFC-CGS. As a result of model-based simulations, we found that DSS (Daily Start and Stop) operation was the most effective method. Energy conservation effect is higher in cold areas because it varies by quantity of hot water supply load. The primary energy consumptions are reduced by 4-13% and CO_2 emissions are reduced by 7-20% in Japan. These values are increased by 1-2% in a case of the reverse power flow. Utility costs are also reduced by PEFC-CGS, but they vary by payment setting in each area.

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  • DEVELOPMENT OF THE MONITORING SYSTEM OF URBAN ENVIRONMENT IN EXPO2005(Environmental Engineering)

    TAKAGUCHI Hiroto, NAKAJIMA Yusuke, SUTO Hiroshi, YOSHIDA Yukiko, INOUE Gen

    AIJ Journal of Technology and Design   12 ( 24 ) 223 - 227  2006  [Refereed]

     View Summary

    We developed the Environmental Monitoring System that was able to combine a collection of the measurement data of the broad zone and immediacy, whose draw on the cell-phone network or human power conventionally. This system was installed on the site of EXPO2005 in Aichi as Environmental Monitoring System (Expo Amedas) and its stability and immediacy were confirmed.

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  • STUDY ON JAPANESE CIRCULATION MODEL BETWEEN THE WOODEN HOUSE AND FOREST RESOURCES

    TAKAGUCHI Hiroto, OJIMA Toshio

    Journal of Architecture and Planning (Transactions of AIJ)   66 ( 544 ) 85 - 92  2001  [Refereed]

     View Summary

    The purpose of this study is building a Japanese circulation model between the wooden house and forest resources. Japanese circulation model satisfies the following condition. 1. The supply and demand of wood for housing circulate in domestic area. 2. CO_2 emission from housing is all fixed by domestic forest. By building the model, we make it clear the way of building the wooden house to reduce CO_2 emission. And this study shows the possibility of perfect circulation by Re-use the wood and promoting the use for biomass energy system.

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  • STUDY ON A CIRCULATION MODEL BETWEEN THE DETACHED HOUSES AND FOREST RESOURCES : Casestudy of Sankyo-son in the Tonami plains

    TAKAGUCHI Hiroto, OJIMA Toshio

    Journal of Architecture and Planning (Transactions of AIJ)   64 ( 516 ) 93 - 99  1999  [Refereed]

     View Summary

    Wood resource has expected to circulate between the forest resources and wood consumption for buildings in some area. There are distinctive formed rural district which are called Sankyo-Son, those do not construct main part. Each Sankyo-Son has some scale grove of tree which is called residential trees (Yasiki-Rin). Those trees have function as windbreak and residents have used those for fuel and building materials. This study grasps Sankyo-Son as the minimal model of resources circulation between buildings and residential trees, and verifies resources circulation from the point of view of LCCO_2 and LCMass.

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  • Forecasting model of activities of the city-level for management of CO2 emissions applicable to various cities

    Jieun Lee, Yasunori Akashi, Hiroto Takaguchi, Daisuke Sumiyoshi, Jongyeon Lim, Takahiro Ueno, Kento Maruyama, Yoshiki Baba

    Journal of Environmental Management   286   112210 - 112210  2021.05

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  • Indoor thermal environments of Cambodian houses

    Hiroto Takaguchi

    Sustainable Houses and Living in the Hot-Humid Climates of Asia     431 - 438  2018.06  [Refereed]

     View Summary

    © Springer Nature Singapore Pte Ltd. 2018. Currently, there are a variety of types of house from traditional stilt houses to contemporary town houses in Cambodia. Peoples have renovated their own houses based on their own needs or wants according to economic growth. Usually, they built a shading first for cutting direct sunlight and extend their space to outside for improving the quality of life. These actions for renovating their own houses, the quality of the indoor and outdoor environment, and occupant behavior influence each other. I report here about the difference in indoor temperature between several houses include the renovated house.

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  • DEVELOPMENT OF NONCOMBUSTIBLE EXTERNAL THERMAL INSULATION SYSTEMS FOR EXTERNAL THERMAL INSULATED RENOVATION

    TSUNOO Satomi, KIYOSE Hideto, TAKAGUCHI Hiroto

    AIJ Journal of Technology and Design   24 ( 56 ) 281 - 284  2018  [Refereed]

    Authorship:Last author

     View Summary

    Recently, the number of renovation with external thermal insulation for energy-saving has been increasing. This report shows four experimental studies on external thermal insulation system for apartment houses. First, based on noncombustible certification test, it was found that the system was composed of noncombustible materials. Second, as the result of test for tensile strength, the system turned out to have the durability to wind load and strain. Finally, strain test and exposure test were carried out. The result showed that strain was within the permissible range in the system through changes of temperatures and weather conditions.

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  • Designing of human behavior, thermal comfort and ceiling on energy

    Jun Nakagawa, Keigo Kobayashi, Hiroto Takaguchi, Shin Ichi Tanabe

    Healthy Buildings Europe 2017    2017  [Refereed]

     View Summary

    © Healthy Buildings Europe 2017. All rights reserved. This research aims to investigate the behavior change and the thermal environment correlation when changing the constraint condition of electric power using a power control system developed independently using open source hardware and a tactile interface. When inhabitants interact with architecture, an interface for the study that is used is the environment not only in the city and architecture but also with consumer electronics. A feature of the study is to build up a system to overcome constraints, which inhabitants set by themselves proactively, as well as to expand a range of thermal comfort by conveying condition of energy consumption to inhabitants.

  • Study on Database of Energy Consumption for Commercial Buildings (DECC) : Actual Situation of Water Consumption of Department Store and Supermarket Store

    高島 健太, 須藤 諭, 村川 三郎, 村上 周三, 坊垣 和明, 亀谷 茂樹, 高口 洋人, 半澤 久, 吉野 博, 奥宮 正哉, 浅野 良晴, 下田 吉行, 依田 浩敏

    学術・技術報告会論文集 = Collection of papers of the conference   5   97 - 102  2016.03  [Refereed]

    CiNii

  • FACTOR ANALYSIS ON ELECTRICITY CONSERVATION RATES IN WELFARE FACILITIES:&ndash;Analysis based on the results of investigation for development of the DECC&ndash;

    KINDAICHI Sayaka, SHIMODA Yoshiyuki, YODA Hirotoshi, SAKAMOTO Yuzo, BOGAKI Kazuaki, MURAKAMI Shuzo, NISHINA Daisaku, MURAKAWA Saburo, KAMETANI Shigeki, TAKAGUCHI Hiroto, HANZAWA Hisashi, YOSHINO Hiroshi, ASANO Yoshiharu, OKUMIYA Masaya

    AIJ Journal of Technology and Design   22 ( 51 ) 645 - 650  2016  [Refereed]

     View Summary

    Changes of the energy consumption in welfare facilities before and after the Great Earthquake of East Japan were analyzed based on the investigation for development of the DECC. Both electricity and primary energy consumption in the facilities with the residential function were reduced by approximately 8% in the Tohoku region and 16% in the Kanto region in 2011 compared to those in 2010 even though the difference of air temperatures were taken into consideration. As the results from multivariate analyses, measures related to lighting were effective for energy savings in the facilities both with and without the residential function. Additionally, changes of setting temperature of freezers could be a strong factor for energy savings in the facilities with the residential function, whereas restriction of use of electric appliances such as portable electric pots had large influences in the facilities without the function.

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  • ENERGY REDUCTION RATE IN A HOSPITAL:Examination of the correction method for the energy consumption reduction rate with consideration for the temperature difference in the hospital

    TSUNODA Kenichi, BOUGAKI Kazuaki, MURAKAMI Shuzo, ASANO Yoshiharu, TAKAMURA Hideki, IWAI Kazuhiro, HARA Eiji, TAKAGUCHI Hiroto, KAMETANI Shigeki, MATSUNAWA Katashi, SAKAMOTO Yuzo

    AIJ Journal of Technology and Design   22 ( 50 ) 183 - 187  2016  [Refereed]

     View Summary

    The environmental impact and energy consumption database is used for reducing carbon dioxide effectively in commercial buildings. This study is a part of a project that aims at the development of the database for energy consumption of commercial buildings in Japan. This paper describes the correction method for the primary energy consumption reduction rate with consideration of a temperature change at a hospital from 2010 to 2013.

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  • Development of zoning-renovation method which improve energy saving and thermal environment for minka and machiya:a study about inspecting method of dwelling house and thermal performance evaluation method for zoning-renovation

    Suzuki Susumu, Takaguchi Hiroto, Nakajima Yusuke, Matsui Ikuo, Takiguchi Yasuhiro, Misawa Fumiko, Kubo Ryuichi, Katsumi Noriko, Sakashita Hinako

    JOURNAL OF THE HOUSING RESEARCH FOUNDATION "JUSOKEN"   42 ( 0 ) 61 - 71  2016  [Refereed]

     View Summary

    The purpose of our research is building zoning-renovation method which improve energy saving and thermal environment for minka and machiya. We believe the following two issues are of particular importance. We will meet design method and performance evaluation method.

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  • Development of a Simulator for Prediction of Urban Environmental Loads : Development of a Sub-Model for C02 Emission Unit Calculation and Examination for Generalization

      ( 28 ) 47 - 56  2015.07  [Refereed]

     View Summary

    We made a long-term prediction simulator of C02 emissions from 1975 to 2050 for Fukuoka City with system dynamics. In this simulator, C02 emissions are calculated by multiplying C02 emission units with amounts of activities. In our past research, we developed a calculation method of activities in detail. On the other hand, C02 emission unit calculation is not enough. Because we didn't have a prediction method of them. Therefore we develop a model to predict C02 emission units in this paper. Moreover, there are various problems to apply this model to the other cities. Improvement of the model for generalization is shown in this paper

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  • Research on the environmental performance of a natural material wooden house

    Hiroto Takaguchi, Yusuke Nakajima, Kei Kawamura, Shumpei Uchida, Yutaka Tonooka, Akinori Sagane

    INTERNATIONAL CONFERENCE ON APPLIED ENERGY, ICAE2014   61   1677 - 1680  2014

     View Summary

    In this study, we examined the advantages of houses that use a lot of wood and natural materials and that also have breathable walls. There is insufficient research literature concerning the characteristics of effects obtained by using substantial quantities of wood for interiors. Typical Japanese modern houses have a damp-proof membrane but this risks being damaged during the tenure of residents or by earthquakes. Breathable walls do not have such a damp-proof membrane. We measured the environmental performance (indoor thermal environment, thermal environment and humidity in walls, and energy consumption) of four houses that use large amounts of wood, with each house using approximately 1.5 times the amount used by a typical wooden house. Results for one of these houses using large amounts of wood, even the room that was not air conditioned was most stable in terms of relative humidity, and 73.1% of measurements were classified as being within the central range of humidity. And the humility inside the wall was low enough to avoid the mold growth. From the viewpoint of energy, generally theses houses consumption of energy were smaller than the national average, but one was bigger because of the size of family and neighborhood circumstances. (C) 2014 Published by Elsevier Ltd.

    DOI

    Scopus

  • Life Cycle Assessment of a Domestic Natural Materials Wood House

    Yutaka Tonooka, Hiroto Takaguchi, Koichi Yasui, Takuo Maeda

    INTERNATIONAL CONFERENCE ON APPLIED ENERGY, ICAE2014   61   1634 - 1637  2014

     View Summary

    We conducted a project entitled "Achieving Climate Change Abatement and Comfortable Life by a Partnership between Forestry and Natural Material Housing (NMH) in Urban Areas," which aims to achieve carbon neutral housing by 2050 by linking forest management to the use of domestic wood in environmentally friendly Natural Materials Housing. In this paper, we conduct long term Life Cycle Assessment of CO2 emissions from afforestation stage to ultimate demolition of the house, encompassing the following stages: afforestation work and log cutting, lumber production, house building, use of the house (with main emissions coming from energy consumption for space heating and cooling, cooking, hot water supply, lighting, and appliances), repair, demolition, and waste treatment. Analysis results indicate that Life Cycle CO2 emissions from Natural Materials Housing are low, when compared with standard cases. (C) 2014 The Authors. Published by Elsevier Ltd.

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  • 宿泊建物のエネルギー消費原単位の推定に関する研究

    井城 依真, 須藤 諭, 吉野 博, 村上 周三, 坊垣 和明, 松縄 堅, 亀谷 茂樹, 高口 洋人, 半澤 久, 奥宮 正哉, 浅野 良晴, 下田 吉之, 村川 三郎, 依田 浩敏, 田中 英紀, 増田 幸宏

    日本建築学会環境系論文集   ( 686 ) 341 - 349  2013.04  [Refereed]

  • A STUDY ON THE ESTIMATION OF ENERGY CONSUMPTION RATE OF ACCOMMODATION BUILDINGS:&mdash;Analysis based on survey data in 2009 fiscal year on the database of energy consumption for commercial buildings (DECC)&emsp;part 2&mdash;

    IKI Yorimasa, OKUMIYA Masaya, ASANO Yoshiharu, SHIMODA Yoshiyuki, MURAKAWA Saburo, YODA Hirotoshi, TANAKA Hideki, MASUDA Yukihiro, SUDO Satoshi, YOSHINO Hiroshi, MURAKAMI Shuzo, BOGAKI Kazuaki, MATSUNAWA Katashi, KAMETANI Shigeki, TAKAGUCHI Hiroto, HANZAWA Hisashi

    Journal of Environmental Engineering (Transactions of AIJ)   78 ( 683 ) 45 - 54  2013  [Refereed]

     View Summary

    In this study we aimed to identify characteristics of energy consumption of accommodation building by drawing on 2009 fiscal year of DECC survey data. Conducting statistical analysis on the base-load and the fluctuation-load on a national scale derived from patterns of variation in the monthly energy consumption, we obtained estimation equations for energy consumption rate.<br> To determine the base-load rate, we focused on differences between heat-generation equipments in the accommodation buildings and classified them into three categories: electrical, fuel-based, and electric-fuel hybrid. We then carried out the multiple regression analysis for each category. As a result, we obtained accurate estimation equations for the electrical and the fuel-based heat-generation equipments. And to determine the summer and the winter fluctuation-load rate, we were able to obtain accurate estimation equations using the multiple regression analysis.

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  • ANALYSIS OF THE ENERGY CONSUMPTION RATE OF OFFICE BUILDINGS BY THE TYPE OF HEAT SOURCE EQUIPMENTS:&minus;Analysis on 2009 fiscal year of DECC survey data&minus;

    IKI Yorimasa, OKUMIYA Masaya, ASANO Yoshiharu, SHIMODA Yoshiyuki, MURAKAWA Saburo, YODA Hirotoshi, SUDO Satoshi, YOSHINO Hiroshi, MURAKAMI Shuzo, BOGAKI Kazuaki, MATUNAWA Katashi, KAMETANI Shigeki, TAKAGUCHI Hiroto, HANZAWA Hisashi

    AIJ Journal of Technology and Design   19 ( 43 ) 1017 - 1022  2013  [Refereed]

     View Summary

    In this study, we aimed to confirm whether it is possible to improve the accuracy of the estimation equations of energy consumption rate of office buildings.<br>By the difference in the type of heat source equipment, we classified the DECC survey data of 2009 fiscal year into three categories: &ldquo;the electrical type&rdquo;, &ldquo;the fuel-based type with boiler&rdquo; and &ldquo;the fuel-based type without boiler&rdquo;.<br>As a result, using the multiple regression analysis, we were able to obtain more accurate estimation equations than before except for summer fluctuation-load rate in the electrical type.

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  • A STUDY ON THE ESTIMATION OF ENERGY CONSUMPTION RATE OF OFFICE BUILDINGS:&mdash;Analysis based on survey data in 2009 fiscal year on the database of energy consumption for commercial buildings (DECC)&mdash;

    IKI Yorimasa, OKUMIYA Masaya, ASANO Yoshiharu, SHIMODA Yoshiyuki, MURAKAWA Saburo, YODA Hirotoshi, SUDO Satoshi, YOSHINO Hiroshi, MURAKAMI Shuzo, BOGAKI Kazuaki, MATSUNAWA Katashi, KAMETANI Shigeki, TAKAGUCHI Hiroto, HANZAWA Hisashi

    Journal of Environmental Engineering (Transactions of AIJ)   77 ( 673 ) 203 - 211  2012  [Refereed]

     View Summary

    This research intends to define base load and fluctuation load from the pattern of monthly changes in the energy consumption of office buildings in Japan obtained from the investigation in 2009 fiscal year, and to clarify the characteristics of energy consumption by determining estimation equations.<br>It became possible to confirm the tendency by the estimation equation obtained from the multiple regression analyses of base load rate. The reliability of the estimation equation of fluctuation load rate by the multiple regression analysis was higher than that of the estimation equation obtained from the simple regression analysis of the average yearly temperature.

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    4
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  • Statistical analysis for energy consumption of office buildings in Japan

    S. Nakamura, H. Yoshino, S. Murakami, K. Bogaki, K. Matsunawa, S. Kametani, H. Takaguchi, H. Hanzawa, M. Okumiya, Y. Asano, Y. Shimoda, S. Murakawa, T. Watanabe

    7th International Symposium on Heating, Ventilating and Air Conditioning - Proceedings of ISHVAC 2011   2   498 - 503  2011  [Refereed]

     View Summary

    In this study, the result of the basic investigation of office buildings in the fiscal year 2008 by DECC (Data-base for Energy Consumption of Commercial Buildings) was shown. Questionnaire survey of office buildings has been carried out national wide, which helped to understand the actual usage pattern of energy consumption. There were 1128 valid responses in this investigation and the national averages of the annual primary energy consumption per square meter was 1738[MJ/m 2-Year].In order to identify the influential factor, the multiple regression analysis was done and from the result, you can see that the largest impact factor on total energy consumption was floor area and the coefficient of determination was over 0.8. The impact factors on energy consumption per square meter were cooling period, density of users and floor area. On the other hand, the coefficient of determination was about 0.25.

  • A STUDY ON THE CHARACTERISTICS OF ENERGY CONSUMPTION FOR WELFARE FACILITIES BASED ON THE DATABASE OF ENERGY CONSUMPTION FOR COMMERCIAL BUILDINGS (DECC)

    IKEDA Daisuke, YOSHINO Hiroshi, ASANO Yoshiharu, OKUMIYA Masaya, SHIMODA Yoshiyuki, YODA Hirotoshi, MURAKAWA Saburo, NISHINA Daisaku, MURAKAMI Syuzo, BOGAKI Kazuaki, MATSUNAWA Katashi, KAMETANI Shigeki, TAKAGUCHI Hiroto, HANZAWA Hisashi

    Journal of Environmental Engineering (Transactions of AIJ)   76 ( 670 ) 1109 - 1117  2011  [Refereed]

     View Summary

    This study is a part of the project that aims to construct the database for energy consumption of commercial buildings on the national scale. The purpose of this study is to obtain the basic data for energy consumption in the welfare facilities for the most of aged persons. The authors classified the buildings into two types of the residential and non-residential facility, and showed the attributes and energy consumption in each type. On the basis of these results, the factors that will have effect on the energy consumption for the unit of floor area in each type were clarified by the technique of multiple regression analysis. Furthermore, the relationships between the outside mean air temperature in each area and the monthly mean energy consumption in each facility were analyzed. After the monthly values of energy consumption were classified into the non-varied part through a year and the varied parts in summer and winter, the effect of the outside air temperature on each part was clarified by the multiple regression analysis.

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    2
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  • REPAIR METHODS FOR EXISTING SCHOOL FACILITIES TO EXTEND USAGE TIME:- Simulation of total cost difference between conventional repair and EIFS improving -

    HIRAI Kenji, Yi Sangjun, TSUTSUMI Hiroki, KOMATSU Yukio, TAKAGUCHI Hiroto

    Journal of Architecture and Planning (Transactions of AIJ)   76 ( 664 ) 1163 - 1170  2011  [Refereed]

     View Summary

    External Insulation Finishing System (EIFS) have been focused on mainly in cold districts in Japan. But EIFS is effective not only in cold districts but also in other districts in terms of elongation improving. Today in Japan, EIFS is not often used and the cost of EIFS is higher than that of conventional repair. The purpose of this study is to examine the payback period of the cost increment by the use of EIFS. This study is LCC simulation of the cost increment and focuses on electric cost reduction by the use of EIFS, specifically that of air conditioners. The main results are:<br>1. It is difficult to collect cost increment only by longer repair cycle and cost reduction of materials.<br>2. For Rooftop repair, built-up roofing with wear course is less expensive than with single-ply roofing in terms of total LCC.<br>3. In consideration electric cost reduction, payback period of cost increment can be examined 40 years.<br>4. By extending the time for usage, for example open school after school, payback period of cost increment is extended by 0-15 years.

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  • DEVELOPMENT OF BUILT ENVIRONMENT LEARNING PROGRAM FOR SUGINAMI ECO-SCHOOL:Case Evaluation in Ogikubo Primary School at the Initial Stage

    TANAKA Ineko, MURAKAMI Minako, TANIGUCHI Shin, MOCHIZUKI Etsuko, KOGA Takaaki, TAKAGUCHI Hiroto

    AIJ Journal of Technology and Design   17 ( 36 ) 755 - 758  2011  [Refereed]

     View Summary

    Suginami eco-school is aiming at the integration of environmentally friendly facilities, management and learning. We planned, executed, and evaluated the built environment learning program for such eco-primary school in Suginami. To examine the possibility of continual execution of the program by school teachers, the questionnaire survey was carried out. The teachers&rsquo; own understandings and considerations to built environment learning seem to have improved after experience of the program. In addition, to continue the built environment learning program by school teachers, it is necessary to define the educational aim and the location of the program in entire curriculum.

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    1
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  • APPLICATION OF DCBA METHOD FOR POLICY PLANNING IN THE REGENERATION OF BUILT-UP AREA

    TAKAGUCHI Hiroto, RYU Maki, HASEGAWA Kei, HATABA Takaji, ENPUKU Takashi, ONO Takahiro

    AIJ Journal of Technology and Design   17 ( 36 ) 603 - 606  2011  [Refereed]

     View Summary

    We applied the DCBA method for built-up area in Japan, and verified the effect of the DCBA method for policy planning in the regeneration of built-up area. The DCBA method is a consensus building tool developed in the Netherlands that integrates environmental engineering and city planning. As a result, we shared the priority and the objective of measures between multi subjects. The effectiveness of the DCBA method application for policy planning in the regeneration of built-up area was shown.

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  • STUDY ON ENERGY CONSERVATION EFFECTS OF HOUSING ELECTRICITY AND HEAT SOURCE EQUIPMENTS:Installation effect of distributed power and heat source system for housing (Part 2)

    KUROKI Hiroshi, SHIMIZU Shotaro, NAKAO Miharu, AOKI Hiroko, TAKAGUCHI Hiroto, WATANABE Toshiyuki

    Journal of Environmental Engineering (Transactions of AIJ)   75 ( 647 ) 43 - 50  2010  [Refereed]

     View Summary

    This paper presents effects of housing electricity and heat source equipments. We studied about energy saving effects of 4 equipments, CO2 Heat Pump water heater (CO2-HP), Micro Gas Engine Co-Generation System (GE-&mu;CGS), Polymer Electrolyte Fuel Cell Co-Generation System (PEFC-CGS), and Solid Oxide Fuel Cell Co-Generation System (SOFC-CGS). As the result, we have found that energy consumption and CO2 emission reduction rate is the highest in case of SOFC-CGS. Energy consumption is reduced by 17-20% using SOFC-CGS on Electric Power Load Tracking Operation, and 44-47% on Rated Operation. And CO2 emission is reduced by 5-20% on Electric Power Load Tracking Operation and 22-46% on Rated Operation.

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    5
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  • STUDY ON MAKING KLIMA-ATLAS WITH CITIZEN PARTICIPATION-Walking tour with citizens to experience and measure the urban thermal environment-:- Walking tour with citizens to experience and measure the urban thermal environment -

    MASUDA Yukihiro, OKADOME Satoshi, KAGIYA Koji, TAKAGUCHI Hiroto, TAKAHASHI Nobuyuki, OJIMA Toshio

    AIJ Journal of Technology and Design   16 ( 32 ) 215 - 219  2010  [Refereed]

     View Summary

    We conducted a walking tour with citizens to experience and measure the urban thermal environment. This investigation was performed to make Klima-atlas with citizen participation by experience surveys. This trial was also performed to examine urban thermal environment from a new perspective based on comfort level (experience values) as indices for evaluation of heat island measures. This project provides an opportunity to raise awareness and increase understanding of the heat island phenomenon and its causes among local citizens. The results were provided to local citizens to create a good feedback loop to improve local environmental conditions.

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  • STUDY ON EFFECT OF SMALL SCALE WOODEN BIOMASS CO-GENERATION SYSTEM

    TAKAGUCHI Hiroto, KOTANI Kenji, SUGISAKI Satoshi

    AIJ Journal of Technology and Design   16 ( 34 ) 1027 - 1030  2010  [Refereed]

     View Summary

    This paper reports the results of small scale wooden biomass Co-Generation System (we call it WBCGS) that had been introduced into S Prefecture T city in 2007. WBCGS uses LPG to start the gas engine and produce heat and electricity sent to the demand side. The fuel of the engine is a wood chip. The raw material of the wood chip is local thinned wood, forest reminder material, and mill ends.<br>As the result of the yearly total efficiency was 62.9%, the power generation efficiency was 10.6%, and thermal efficiency was 52.3%. After WBCGS had been introduced, 101 t- CO2 a year was reduced 88.6% has been reduced compared with conventional system.

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  • Cooling Effect of Tokyo Bay on "Sultry Nights" with Calm Wind Conditions

    Yukihiro Masuda, Keiko Miyazaki, Hiroto Takaguchi, Koji Kagiya

    JOURNAL OF ASIAN ARCHITECTURE AND BUILDING ENGINEERING   8 ( 2 ) 555 - 562  2009.11  [Refereed]

     View Summary

    In this study, the authors focused oil light wind from the sea and its thermal environment relaxation effect during periods of calm conditions during the night when there is a concern that the urban heat island phenomenon is exacerbated. The light wind from the sea may be characteristic to Urban waterfront areas where temperature increase persists throughout the day even during the night because of accumulated heat Oil the ground surface and artificial exhaust heat. The wind directions during periods of calm conditions at night were compared. The ratio of sea breeze to land wind near the ground level was greater than the ratio of the Upper-level wind during calm conditions at night. The authors focused on the period when Upper-level wind was calm. As the tipper-level wind became calm, the wind direction changed from land breeze to sea breeze, and the temperature decreased as the direction of the wind changed. These observations indicated the temperature lowering effect of light wind from the sea. Previous studies of the wind system during the night generally discussed the land breeze. This study was unique in that the authors' focused Oil utilizing the cool light breeze From the sea at night.

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    1
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  • Examination on Integration Use of Energy and Water Resource System at the Eco-campus

    Yuan Su, Hiroto Takaguchi, Weijun Gao

    ENVIRONMENTAL SCIENCE AND SUSTAINABILITY     19 - +  2009  [Refereed]

     View Summary

    The universities use much more energy generally than other types of industries, because they have many institutions and long-time activities. So it is important to grasp the actual situation of energy consumption at campus precisely. In this paper, the integration use of energy / water resources system at one typical eco-campus has been examined by taking a case study at Hibikino campus. Firstly, the energy and water consumption of eco-campus has been analyzed by using the data from 2001 to 2007. Then the influence between operating mode and energy use on running effect of energy system and water recycling has been analyzed respectively and compared with the conventional system. Furthermore, the improvement on the system has been taken into consideration after the evaluation.

  • EFFECT OF HOUSING RENOVATION ON ENVIRONMENTAL LOAD REDUCTION:Measures to reduce CO2 emission in Fukuoka prefecture

    HOSOKI Tsubasa, TAKAI Tomohiro, TAKAGUCHI Hiroto, WATANABE Toshiyuki

    Journal of Environmental Engineering (Transactions of AIJ)   73 ( 625 ) 409 - 414  2008  [Refereed]

     View Summary

    Although the population of Japan is going to decrease, the energy consumption of the residential sector is assumed to increase. On the other hand, new construction will decrease gradually, and the ratio of the existing houses in housing market will grow up. This research shows the prediction of CO2 emission between 2005 and 2050 from housing sector of Fukuoka Prefecture by construction, operation, demolition and area based on the present situation of the housing stock.<br>Fukuoka Prefecture is divided into &ldquo;Fukuoka City&rdquo;, &ldquo;Kitakyushu City&rdquo; and &ldquo;The other area&rdquo;. The trend CO2 emission and the main factor are different by areas, directly because the decrease of population and the change of household composition. Accordingly the effect of the measures would change. In Fukuoka City CO2 emission has a high percentage of the construction and operation factor on apartment house, therefore it is said that the measures for the apartment house are comparatively important. Meanwhile in Kitakyushu City and The other area, new construction of detached house has a large percentage in new construction, but taken altogether, it is a small amount. The measures for the housing stock are important.

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  • 522 Effect of Housing Renovation on Environmental Load Reduction

    HOSOKI Tsubasa, TAKAI Tomohiro, TAKAGUCHI Hiroto, WATANABE Toshiyuki

      ( 46 ) 485 - 488  2007.03  [Refereed]

    CiNii

  • 523 Evaluation on Sustainable Habitat System with Throughput Simulator : Part1 development of Throughput Simulator

    TAKAI Tomohiro, HOSOKI Tsubasa, TAKAGUCHI Hiroto, WATANABE Toshiyuki

      ( 46 ) 489 - 492  2007.03  [Refereed]

    CiNii

  • Effect of housing renovation on environmental load reduction

    Hosoki Tsubasa, Takaguchi Hiroto, Watanabe Toshiyuki

    Journal of architecture and urban design, Kyushu University   ( 11 ) 111 - 118  2007.01  [Refereed]

     View Summary

    Although the population of Japan is going to decrease, the energy consumption of the residential sector is assumed to increase. On the other hand, new construction will decrease gradually, and the ratio of the existing houses in housing market will grow up. Therefore it would be very important to reduce the energy consumption of the existing houses. This study estimates household CO2 emission between 2005 and 2050 in Fukuoka. This paper aims to clarify reduction effect of environmental load by administrating each measures. The results of our analysis are as follows. 1)Effects of measures to existing houses are 0.8-2.5% larger than to newly built houses. 2)Housing policies can contribute to reduce CO2 emission by extending the lifetime of houses and promoting multifamily housing.

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  • Study on energy consumption and indoor thermal environment of floor heating system using exhausted heat from PEFC-CGS

    綾垣伸康, 尾崎明仁, 黒木 洋, 高口洋人, 渡辺俊行

    Journal of architecture and urban design, Kyushu University   ( 11 ) 127 - 136  2007.01  [Refereed]

     View Summary

    We have been developed the numerical simulation program to calculate the primary energy consumption of housing Polymer Electrolyte Fuel Cell Co-Generation System(PEFC-CGS) combined with floor heating of warm water type. In this program, the floor heating has been modeled with the piping pitch of warm water by using the fin efficiency. The indoor temperature has been controlled by Predicted Mean Vote(PMV) for over minus 0.5. As the results of this simulation, it is clarified that the floor heating has had effected the indoor by thermal radiation from floor surface and that the primary energy consumption has been reduced up to 5% in winter when PEFC-CGS is combined with the floor heating of warm water type.

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  • Feasibility study on using combined heat and power energy systems for various buildings in Japan

    Ruan Yingjun, Watanabe Toshiyuki, Takaguchi Hiroto, Gao Weijun

    Journal of architecture and urban design, Kyushu University   ( 11 ) 119 - 126  2007.01  [Refereed]

     View Summary

    This paper examined the energy consumption characteristics in six different buildings including apartments, offices, commercial buildings, hospitals, hotels and education facilities. Then 5-hectare(50,000m^2) development site for respective building's type was assumed as case study to evaluate the viability of Combined Heat and Power(CHP) energy systems. A CHP system was selected according to their characteristics for each type building. And HEATMAP, a district energy system analysis software, was used to evaluate each system's energy saving, environmental effect and economic efficiency. The results can be summarized as follows: in hotels and hospitals at the proposed site, the CHP system is an attractive option in Japan. In others buildings, especially commerce buildings and offices, the introduction of CHP system is unreasonable.

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  • Questionnaire survey on energy consumption of residential buildings in China

    Liang Yu, 渡辺俊行, 高口洋人, 高偉俊, 張晴原

    Journal of architecture and urban design, Kyushu University   ( 11 ) 103 - 110  2007.01  [Refereed]

     View Summary

    At present, the energy consumption has increased rapidly along with a large economic growth accomplished in China. Especially, energy consumption in residential sector has been increasing annually. The purpose of this research is to grasp the energy consumption of present situation for residential buildings in China. We did a questionnaire survey in northeast and middle region of China, and this survey will plan to spread at the whole country. In this paper, we reported about the results of the survey in each area, and the analysis of heating energy consumption using the numerical simulation.

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  • A study on effective operation methods and energy conservation effects of Housing Polymer Electrolyte Fuel Cell Co-Generation Systems with electric storage capacitor

    Niina Kohei, Shimizu Syotaro, Takaguchi Hiroto, Watanabe Toshiyuki

    Journal of architecture and urban design, Kyushu University   ( 11 ) 97 - 102  2007.01  [Refereed]

     View Summary

    This paper presents the effctive operation methods and the energy conservation effects of housing Polymer Electrolyte Fuel Cell Co-Generation System(PEFC-CGS) with an electric storage capacitor. We built the model-based simulation program to calculate the energy budget in the case that PEFC-CGS and Storage System were introduced to detached houses considering specifications of real PEFC-CGS and assumed Storage System. As a result of model-based simulations, we found that DSS(Daily Start and Stop) operation to follow the power loading was the most effective method. It is the calculation result of winter 2 weeks that effect could be comfirmed most. 27% of CO2 emissions discharge, and 19% of the amounts of the primary energy consumption were reduced.CO2 of 7.16kg-CO2 and the primary energy of 100MJ were reduced more than the case that only PEFC-CGS was introduced.The capacity of the Storage System of 600Wh should be necessary to get this effect.

    DOI CiNii

  • Research for energy consumption of residential buildings in China: A questionnaire survey on energy consumption in Changsha and Luoyang

    Ying Jun Ruan, Wei Jun Gao, Toshiyuki Watanabe, Hiroto Takaguchi, Liang Yu

    Journal of Harbin Institute of Technology (New Series)   14 ( SUPPL. ) 76 - 80  2007.01  [Refereed]

     View Summary

    In order to grasp to the energy consumption present condition for residential buildings, a questionnaire survey had been carried out in Changsha city Hunan Province and Luoyang city Henan Province. This paper has been present the preliminary investigation results. The results can be summarized as follows; 1) The households with floor area ranging 75 m-125 m account for more than 52% of the total amount investigated. More than 64% buildings had been constructed in recent ten years. 2) Total energy consumption for every household with 71, 856 MJ/Year in Luoyang is 3.1 times of that in Changsha being 23, 431 MJ/Year. But annual electricity energy consumption in Changsha is 2.2 times of that in Luoyang. 3) The space heating thermal demand accounts for more than 70% of the total energy demand in heating district. 4) There is much adoption of the saving energy countermeasure in two cities. But there is still considerable energy saving potentials in residential buildings.

  • Prediction of energy efficiency and thermal environment of residential buildings utilizing PEFC-CGS combined floor heating system

    Nobuyasu Ayagaki, Akihito Ozaki, Hiroto Takaguchi, Hiroshi Kuroki, Toshiyuki Watanabe

    IBPSA 2007 - International Building Performance Simulation Association 2007     546 - 553  2007  [Refereed]

     View Summary

    The systematic numerical simulation program is developed to calculate the total energy efficiency of housing polymer electrolyte fuel cell co-generation system (PEFC-CGS) which is combined with hot water floor heating (HWFH). This simulation program can also predict actual building physics of heat transfer such as mutual radiant heat among interior surfaces and thermal strage relating with piping pitch of hot water and so on. The indoor temperature can be controlled by PMV (Predicted Mean Vote) to take account of thermal sensing affected radiant heat. As the results, it is clarified that the primary energy consumption is reduced up to 12% in winter because of the utilization of exhaust heat from PEFC-CGS and decreasing of indoor temperature for space heating by floor heating utility.

  • A Regional Comparative Study on Energy Consumption of Residential Buildings in Japan

    SOEJIMA Masashige, OZAKI Akihito, TAKAGUCHI Hiroto

    Journal of architecture and urban design, Kyushu University   10 ( 10 ) 77 - 82  2006.07  [Refereed]

     View Summary

    The Kyoto protocol was taken effect, we have to reduce CO2 in residential sector that accounts for about 14% of total energy consumption in Japan. So it is necessary to understand energy consumption of residential buildings. According to this background, the energy consumption of residential buildings was measured for long-term on national scale. This paper reports the use structure of annual energy consumption and the energy consumption for air-conditioning, in which there are a lot of differences of each region. The results are as follows; Annual energy consumption in Hokkaido, Tohoku and Hokuriku regions are about twice time as much as that in Kyushu. Especially, there is a difference in the energy consumption for air-conditioning. Some of reasons are meteorological conditions and heating time and temperature of room when it is heating.

    DOI CiNii

  • A Study on Effective Operation Methods and Regional Energy Conservation Effects of Housing Polymer Electrolyte Fuel Cell Co-Generation Systems

    SHIMIZU Shotaro, KUROKI Hiroshi, TAKAGUCHI Hiroto

    Journal of architecture and urban design, Kyushu University   10 ( 10 ) 83 - 89  2006.07  [Refereed]

     View Summary

    This paper presents effective operation methods and regional energy conservation effects of housing Polymer Electrolyte Fuel Cell Co-Generation System (PEFC-CGS). We built the model-based simulation program to calculate energy budget in a case that PEFC-CGS was introduced to detached houses considering specifications of real PEFC-CGS. As a result of model-based simulations, we found that DSS (Daily Start and Stop) operation was the most effective method. Energy conservation effect is higher in cold areas because it varies by quantity of hot water supply load. The primary energy consumptions are reduced by 4-13% and CO_2 emissions are reduced by 7-20% in Japan. These values are increased by 1-2% in a case of the reverse power flow. Utility costs are also reduced PEFC-CGS, but they vary by payment setting in each area.

    DOI CiNii

  • Study on Housing Improvements for Energy Saving

    HOSOKI Tsubasa, HAGIHARA Tomoko, TAKAGICHI Hiroto

    Journal of architecture and urban design, Kyushu University   8 ( 8 ) 123 - 128  2005.07  [Refereed]

     View Summary

    Although the population of Japan is going to decrease in 2006, the energy consumption of residential sector is predicted to increase. Therefore it would be very important to reduce the energy consumption of existing houses. This study defines housing improvements for energy saving as repair work to reduce energy consumption of residential buildings. This paper aims to clarify the actual situation of housing repair works for energy saving in Fukuoka and its saving effect. The results of our analysis are as follows; 1)For the spread of energy serving improvements, expressing energy saving effects in number is effective. 2)Technique with high cost performance is preferable, since large-scale investment is hard to be made for the repair construction.

    DOI CiNii

  • Effect of a Desiccant Ventilation System on Residential Energy Saving

    JIN Ri, FUJISHIMA Koji, TAKAGUCHI Hiroto

    Journal of architecture and urban design, Kyushu University   8 ( 8 ) 115 - 121  2005.07  [Refereed]

     View Summary

    Desiccant ventilation system is a dehumidification ventilation system used the dehumidification material. If the air eliminated moisture and cooled down is introduced by the desiccant ventilation system, the cooling load can be decreased. In this paper, we present the effect of desiccant ventilation by comparison with the controled total heat exchange ventilation and total heat exchange ventilation. We studied two cooling patterns in four places(Kagoshima, Fukuoka, Tokyo, and Morioka). One is intermittent cooling and the other is all-room cooling during the whole day. In the case of intermittent cooling, cooling load reduction rates are 9.89% on desiccant ventilation, 0.26% on the controled totaled heat exchange ventilation, and -3.36% on total heat exchange ventilation in Kagoshima, 9.11%, 0.24%, and -3.79% in Fukuoka, 10.30%, 0.39%, and -4.28% in Tokyo, and 6.80%, 0.19%, and -16.76% in Morioka. In the case all-room cooling, 17.8%, 4.62%, and 6.43% in Kagoshima, 17.80%, 3.96%, and 6.49% in Fukuoka, 18.47%, 4.62%, and 6.49% in Tokyo, and 12.43%, 1.03%, and -6.98% in Morioka. As the result, cooling load reduction effect of desiccant ventilation is the highest in every places.

    DOI CiNii

  • ENVIRONMENTAL LOAD UNITS OF RECYCLED BUILDING MATERIALS AT THE TIME OF BUILDING MATERIALS MANUFACTURE

    MORO Takashi, TABAI Hiroshi, TAKAGUCHI Hiroto

    Journal of Environmental Engineering (Transactions of AIJ)   70 ( 595 ) 113 - 119  2005  [Refereed]

     View Summary

    This study aims at contributing to life Cycle Assessment Analysis of resource recycling building and shows how to calculate environmental load units from manufacturing of recycled building materials. The results are as follows. 1) The environmental loads of 31 recycled building materials became clear by a reference investigation and a questionnaire performed to the makers. 2) We presented the method of incorporating the environmental loads which were calculated by accumulation method into Life Cycle Assessment Analysis with environmental load units by Input-Output table. And we made the environmental load units of recycled building materials at the time of building materials manufacture.

    DOI CiNii

  • 住宅における固体高分子型燃料電池の導入効果に関する研究

    黒木洋, 渡辺俊行, 赤司泰義, 高口洋人, 浅木朗

    都市・建築学研究 九州大学大学院人間環境学研究院紀要 第6号:155-165   ( 6 ) 155 - 165  2004.07  [Refereed]

  • Detailed Research for Energy Consumption of Residential Buildings in the North of Kyushu

    INOUE Hiroyuki, WATANABE Toshiyuki, OZAKI Akihito

    Journal of architecture and urban design, Kyushu University   6   145 - 154  2004.07  [Refereed]

     View Summary

    Energy Consumption in residential sector has been increasing year by year since 1965. Reconsideration of a traditional energy supply system is needed to improve this present situation. Individual dispersed power source systems, such as photovoltaic system and housing micro cogeneration system, is considered as one of systems which enable to save energy for housing. In order to utilize the system effectively, understaning energy consumption of residential buildings is required. This paper presents measured results on seasonal energy consumption classified based on uses, seasonal trends of energy consumption in one day, and heating demand of residential buildings located in the north of Kyushu.The results are as follows: 1) Energy consumption for hot water supply is larger than ones for lighting, air-conditioning and cooking in most houses, 2) Energy consumption for each use and the daily pattern are strongly affected by members of family, schedule of living and hot water supply system, 3) Photovoltaic system and hot water supply heat-pump-type system using natural refrigerant CO_2 are quite effective to save energy of residential buildings, 4) Heating demand and electric demand of residential buildings are clarified by detailed measurement for installing individual dispersed power source system.

    DOI CiNii

  • Experimentation and Verification of the “Perfect Recycle House"

    Yusuke Nakajima, Hiroto Takaguchi, Toshio Ojima

    Journal of Asian Architecture and Building Engineering   1 ( 1 ) 167 - 174  2002.03  [Refereed]

     View Summary

    This paper proposes two typical environmentally symbiotic residences and verifies their validity. These residences are designed on the theme "resource circulation and reduction of environmental impact". One of them is a wooden house based on the Japanese traditional timber frame house, and the other an industrial residence using modern technology and materials. The following results were obtained by the design of these two experimental residences (the Perfect Recycle House), through construction and verification.<br>-It is necessary to establish "recyclable buildings" and "recyclable facilities." "buildings" means use of materials which are durable and capable of being recycled, and adoption of dismantling-friendly building methods, and"recyclable facilities" with the aim of establishing circulatory system from the site to the wide area.<br>-Comparison of the W-PRH and S-PRH with conventional houses (wooden house and light gauge steel frame house)by the PRH value were very good; W-PRH shows 170 of PRH value and S-PRH of 402.<br>

    DOI CiNii

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Books and Other Publications

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Misc

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Works

  • エネマネハウス2015 ワセダライブハウス

    Architectural work 

    2015.10
    -
     

  • 龍蔵寺倶会堂

    Artistic work 

  • 日本橋遠五ビルエントランス改修工事

    Artistic work 

Awards

  • Waseda University Teaching Award

    2019.11   Waseda University  

  • 最優秀賞

    2015   エネマネハウス2015

    Winner: ワセダライブハウス

  • Japan Student Science Award

    1987  

Research Projects

  • Construction of habitat system general-purpose model towards measure planning support for urban environmental load reduction

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Project Year :

    2014.04
    -
    2017.03
     

    AKASHI YASUNORI

     View Summary

    This research defines an urban whole system with social dynamics as “Habitat System”, and has constructed the general-purpose model of Habitat System applicable to different cities. Through constructing the model, a simulator, that enables to predict long-term urban environmental loads according to introduction and spread of the reduction measures and to support the effective policy planning, has been developed. The main features of the simulator are 1) versatility not dependent on city size, 2) convenience of automatically identifying internal parameters, 3) applicability that can relatively easily reflect various policy scenarios and 4) expandability that quantify the ripple effect among multiple cities by policy scenarios. By applying this simulator to different cities, we have clarified long-term CO2 emission reduction through various policy scenarios.

  • Construction and application of Database for Energy Consumption of Commercial building

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Project Year :

    2010
    -
    2012
     

    SAKAMOTO Yuzo, KAMETANI Shigeki, IKAGA Toshiharu, BOUGAKI Kazuaki, HANZAWA Hisashi, YOSHINO Hiroshi, ASANO Yoshiharu, AKAGUCHI Hiroto, OKUMIYA Masaya, SHIMODA Yoshiyuki, MURAKAWA Saburo, YODA Hirotoshi, MURAKAMI Shuzo

     View Summary

    (1) According to the use and region, we collected and analyzed comprehensively, the data on the energy consumption of commercial buildings in Japan
    (2)Using multiple regression analysis, we extracted according to the use, the factors affecting the energy consumption of commercial buildings in Japan
    (3)After the scrutiny of the existing database and additions to the database of survey results of 2011, We have published database on the Internet

  • Development of a discussion tool for sustainable city

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (A)

    Project Year :

    2009
    -
    2011
     

    TAKAGUCHI Hiroto

     View Summary

    The aim of this research is to develop the tool for consensus-building which is the discussion tool for the sustainable city. The tool was developed on the DCBA Method which was originally developed in Netherlands as a basic. We arranged it from the viewpoint of Japanese situation especially enhancement of sustainability of the built-up area in local city. We collected the necessary information for developing the tool, organizing the workshop and developed how to provide the result to the public.
    In the enforcement of the study, we intended for "East Elementary School Precinct", the built-up area of Honjo City located in Northern part of Saitama. This precinct is located in the central city area where the city hall is located. We held the workshops which local inhabitants, the administrative persons, environmental NPO, researchers of the universities, school commuters participated. These workshops were organized under the cooperation of local government and us from the first year.
    From first to second year, we squeezed a theme to discuss in environmental aspects, and arranged the necessary information and developed the tool. In the last year, we developed the tool as the general discussion tool which other themes including comfort and the economy and so on. And we held a workshop and inspected usability and effect of the tool.

  • Earthquake Damage Prediction in Fukuoka Area due to Kego Fault and its Environmental and Economic Impact Evaluation

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Project Year :

    2006
    -
    2008
     

    KAWASE Hiroshi, SEIKE Tadashi, TAKENAKA Hiroshi, YAMADA Nobuyuki, MURAKAMI Hitomi, TAKAGUCHI Hiroto, FUJITA Toshiyuki, MATSUSHIMA Shinichi, NARAN Mandora

  • 家族用分散型電熱源のエネルギー利用効率向上と省エネライフスタイル

    日本学術振興会  科学研究費助成事業 基盤研究(C)

    Project Year :

    2006
    -
    2007
     

    高口 洋人, 住吉 大輔

     View Summary

    本研究では、家庭用エネルギーの総合利用効率の向上を目的として、家庭用分散型電熱源機器の排熱利用と居住者のライフスタイルの影響に着目して検討を進めた。
    まず、家庭用固体高分子形燃料電池CGS、家庭用固体酸化物形燃料電池CGS、家庭用ガスエンジンμCGSの3つのコージェネレーションシステムと家庭用自然冷媒(CO_2)HP給湯器について実運転状況を再現できる計算モデルを構築し、それを用いて個別分散型電熱源機器の地域別導入効果を算出した。検討の結果、給湯負荷が大きいほどCGSのエネルギー効率が高くなる傾向が見られた。
    そこで排熱の有効利用のため、排熱利用機器と個別分散型電熱源機器とのコンビネーションシステムについて検討を進めた。ここでは夏季の排熱を利用するデシカント換気システムと冬季の排熱を利用する温水式床暖房とを対象とし、家庭用固体高分子形燃料電池CGSとを組み合わせた際の省エネルギー効果等について明らかにした。次に、さらなる総合エネルギー利用効率の向上、省エネルギーの実現のため、電力需要や給湯需要と密接な関わりのあるライフスタイルについて検討を進めた。まず、ライフスタイル調査を実施し、既往のライフスタイル調査の結果も活用して、複数世帯で1台の燃料電池CGSを共有する使い方を提案し、その導入効果を明らかにした。さらに、分散型電熱源機器が福岡市全体に普及した場合の系統電力の負荷平準化効果についても明らかにした。
    最後に、多様な単身世帯のライフスタイルについての実態調査を行い、その生活パターンとエネルギー消費行動との関わりについて詳細に分析の上、分類・整理した。さらにライフスタイルからエネルギー消費量を推定する計算モデルを構築し、それを用いてライフスタイルに応じた有効な省エネルギー対策について検討した。最後に、これらの結果から、省エネライフスタイルへ誘導するためのフローチャートを作成した。

  • A study on the energy self-sufficient house with the distributed power and heat source system

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Project Year :

    2004
    -
    2005
     

    WATANABE Toshiyuki, AKASHI Yasunori, TAKAGUCHI Hiroto

     View Summary

    On this study, we developed a numerical simulation program to calculate the introduction effect of the Polymer Electrolyte Fuel Cell Co-Generation System (PEFC-CGS) that has been developed as a distributed power and heat source system, and examined its effect. To develop a numerical simulation program, we set up the prototype model of PEFC-CGS by the Energy Sufficient Sustainable House at Island City in Fukuoka, figured out its partial load efficiency, start up energy consumption, heat loss from the hot water tank and so on, and those date for it. By using this program, we calculated the introduction effect on the detached house by the operation methods, and the regions, on the case of it shared, and on the case of using it together with other systems such as the desiccant ventilation system.
    From the results of the calculations, it became clear that DSS operation was the most effective method to operate. In the case of the double income family with two children, if they adopt the DSS operation tracking the electric load without reverse power flow, they can reduce 11% of the primary energy consumption and 16% of the CO_2 emission per year. Furthermore they can save 1〜2% more with the contract of reverse power flow. If the 1kW PEFC-CGS is shared by 2 to 3 families, the introduction effect increase 6% more than the case of single family.
    Today, there are a lot of types of the distributed power and heat source systems, such as a gas engine CGS, a solar cell and heat system and so on, and the combinations of those equipments exist innumerably. We would like to continue the study and improvement to be able to figure out the best combination according to the family make-up, natural environment, their life style and life stage.

  • Utilization of the Deep Underground Space in Tokyo

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Project Year :

    2002
    -
    2004
     

    OJIMA Toshio, TAKAHASHI Nobuyuki, DEWANKER Bart, WEIJUN Gao, TAKAGUC Hiroto

     View Summary

    In 2001, the law concerning Deep Subterranean Utilization went into effect in Japan. The law states that the use of space at a certain depth underground does not violate the right of the private above-land ownership. In order to provide for urban disaster mitigation in Tokyo and lessen the environmental burden, technological planning should be applied to Tokyo. This researcher focuses on deep underground space as the last precious unused space of the mega city, Tokyo. We present an effective way of developing a deep underground space network in a closed-off section of Tokyo Bay to promote urban renewal in Tokyo.
    Our research group has been working on projects related to the utilization of deep underground spaces. We have proposed several projects since the 1970s and examined their effectiveness. An outline of the latest project that aims at effective utilization of deep underground is presenter in this research. The way effective implementation of the project can be achieved is also discussed. These projects are major public- works and need to receive higher budget priority Accordingly, it is very important to work out new public- works schemes. This researcher also focuses on the results of feasibility studies and shows how the project can be realized by integrating urban disaster prevention with urban environment improvement.

  • Prediction of Heating Conditions and Thermal Response of Structural Members Exposed to Localized Flies

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Project Year :

    1999
    -
    2001
     

    HASEMI Yuji, WAKAMATSU Takashi, KAGIYA Koji, TAKAGUCHI Hiroto

     View Summary

    Through experiments and numerical studies, following results have been obtained.
    (1)Demonstration of the effectiveness of the localizedness of fire exposure for the fire safety of columns
    Through model experiments on a steel column exposed to a localized fire source, it has been found that its maximum temperature rise be reduced to 50 - 90 % of the column adjacent to an even flame heating.
    (2)Modeling and tabulation of heat flux distribution along a beam and a column exposed to a localized heating
    Model experiments using steel structures and porous propane burners have yielded sole dependence of heat flux distribution along a beam/ column for respective configurations and structure/fire configurations. The experimental correlations have been validated against a series of full-scale heat flux measurements. Numerical fluid dynamcs has been applied to the reproduction of the heat flux field of the steelbeam above a fire source, which has resulted in th e reproduction within the error of 30 % by the improvement of the modeling of flame radiation.
    (3)Numerical cabulation of temperature response of metal structure exposed to a localized heating
    Finite difference method has been applied to the prediction of the temperature field of a steel column exposed to a localized fire. Empirical constants such as heat transfer coeffifent have been tuned against a reference test. The cabulation has resulted in a fine reproduction of the experimental results.

  • Prediction of Heating Conditions and Thermal Response of Structural Members Exposed to Localized Flies

  • Utilization of the Deep Underground Space in Tokyo

  • A study on the energy self-sufficient house with the distributed power and heat source system

  • Earthquake Damage Prediction in Fukuoka Area due to Kego Fault and its Environmental and Economic Impact Evaluation

  • 家族用分散型電熱源のエネルギー利用効率向上と省エネライフスタイル

    科学研究費助成事業(九州大学)  科学研究費助成事業(基盤研究(C))

  • Development of a discussion tool for sustainable city

  • Construction and application of Database for Energy Consumption of Commercial building

  • 家庭用燃料電池の導入効果に関する共同研究

  • A study onZero Energy Residence

  • サステイナブル建築の設計プロセスの日米比較

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Presentations

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Specific Research

  • 恒久転用可能な災害即応型仮設住宅の研究

    2019   吉村靖孝

     View Summary

    本研究の目的は、仮設住宅を備蓄することで供給までの期間を短縮し、被災者に救援物資と住宅を同時に提供できる、恒久住宅にも転用可能な災害即応型仮設住宅(以下、恒即仮設)を開発し、その運用システムを提案することにある。特定課題研究では、① コンテナ型仮設住宅の海外での生産を想定し、タイ・バンコク郊外の住宅ユニット製造メーカーの工場を視察し、実現可能であることを確認。また、② 仮設住宅と共に、応急仮設住宅の柱になるであろう借り上げ住宅の供給可能数の想定を行い、建設型の仮設住宅と役割分担を明確にした。

  • 後発開発途上国における調理・給湯・空調の低炭素化とリープフロッグ型発展

    2014  

     View Summary

    プノンペン近郊農村部の戸建て住宅23件を対象として、農村部の住居形態とライフスタイル、エネルギー消費の実態調査、及び室内外温熱環境の実測調査を実施した。ライフスタイルとエネルギー消費に関して、給湯器・空調器を使用している世帯がなく、年間エネルギー消費量に占める種別割合は、調理に用いる薪・木炭が8割を占めた。住居形態に関しては、農村部住居の8割近くを占める高床式住居のうち3割は床下空間に増改築を施しており、床上空間は昼夜共にあまり使用されていなかった。しかし、増改築を施して新設された空間は、寝室やリビングといった用途で使われているにも関わらず他の空間に比べて室温が高い傾向にあった。

  • カンボジアにおける太陽熱冷房システムによるネット・ゼロエネルギー住宅の実現

    2012  

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    カンボジアのような途上国においては、今後のエネルギー消費の増大は、生活水準の向上に伴い避けられない。また同時に、現在先進国で行われているような対策は、所得水準の低さから導入は困難であり、経済発展に応じた逐次的対策の実施が求められる。そこで、カンボジアにおける太陽熱冷房システム導入の検討に先だって、ヒアリング調査により現地の住宅の企画から設計、建材設備の調達、販売までを含む住宅に関する現状を網羅的調査し、これまでの調査結果も踏まえ、居住者の所得、住宅内エネルギー消費量、対策の導入費用の推移を予測に基づく省エネ技術普及予測を行った。最期に、各対策を導入した際の住宅内エネルギー消費削減量、投資に対する利益率を比較し、行政による補助金等に頼らなくとも実現可能な省エネ改修計画を作成した。 住宅購入時(2016年)には、29.6[GJ/年]である住宅内エネルギー消費量も、2041年には73.8[GJ/年]と約2.5倍に増加することがわかる。特に、2016年からの2021年にかけては高度経済成長期に差し掛かり世帯所得の伸びが非常に大きいと予測されるため、住宅内エネルギー消費量の伸びもそれに比例して大きくなる。 改修計画では世帯所得の6[%]を改修予算に充てるものとし、次の3点を考慮して対策導入の順位付けを行う。①:1回の導入でより多くの年間住宅内エネルギー消費量を増加抑制できるもの、②:導入後の光熱費増加抑制効果によって導入費用を回収できるもの、③:①②のペースがより速いもの。結果は、すだれを毎年導入し、加えて2016年に屋根断熱、LED照明、2021年に太陽熱温水器、2026年に内断熱、2031年に高効率冷房、LED照明、2036年に太陽熱温水器、2041年に太陽光パネルを導入するものであった。2016年時の増加抑制量は3.2[GJ/年](12.5%)であるが、2041年時点では56.9[GJ/年](77.1%)と年代が進むにつれて、その量、割合共に増加している。しかし、2045年時点では投資回収可能期間が残り5年となって、多くの対策で導入費用の回収が見込めなくなるため、すだれのような簡易的な対策しか導入できずに、増加抑制量は減少に転じることとなる。本計画は行政による助成等に期待しない計画となるが、それでも最終的には、35年間で1.156[TJ]の住宅内エネルギー消費量の増加抑制効果が見込める。

  • カンボジアにおける蒸暑パッシブ住宅技術開発とその誘導施策

    2011  

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    1.はじめに 本研究では、経済発展による人口増加と生活水準向上が著しいカンボジアにおいて、将来的に見込まれる住宅内冷房エネルギー消費量の急増を抑制するためのパッシブ住宅技術の開発を行った。パッシブ住宅技術を導入する住宅タイプには、都市部で増加傾向にあるテラスハウス型の住宅を選定した。また、2010年度のシミュレーション研究により、テラスハウスの冷房エネルギー消費量急増抑制には、屋根面の遮熱対策が効果的である判明していたため、本研究では特に、テラスハウスの屋根面における蒸暑パッシブ住宅技術の開発を実施した。2.パッシブ住宅技術の選定とシミュレーションによる室内温熱環境改善効果の事前検証 先進国にて導入されている屋根面におけるパッシブ住宅技術を整理すると、アルミシートや塗料を用いて屋根面の日射反射率を高め、建物への侵入する熱量を減少させるものが多い。そこで本研究では、それらの代表的な手法としてアルミシートと高反射塗料を取り上げ、この2手法について、熱・換気回路計算プログラムNETSを用い、その導入による室内温熱環境改善効果の事前検証を行った。その結果、アルミ箔を屋根面から5cm浮かせて設置したモデル(以下、アルミモデル)では、一日の平均室温が現状モデルから3.5℃低下し、クリーム色の高反射塗料を屋根面に塗布したモデル(以下、高反射塗料モデル)では、現状モデルから2.6℃低下するという結果となった。3.実測調査よる室内温熱環境改善効果の検証 実測調査では、カンボジア王立大学(Royal University of Fine Art)の協力を得て、現地のテラスハウス一棟に対して順番に各手法を導入し、各モデル3日間ずつ室内温熱環境の実測データを収集した。その結果、屋根面における一日の平均日射反射率は、現状モデルで37.8%、アルミモデルで74.1%、高反射塗料モデルで67.6%となり、屋根面からの一日の平均熱取得は、現状モデルで93.8[W/㎡]、アルミモデルで17.1[W/㎡]、高反射塗料モデルで24.6[W/㎡]となった。また、屋根面からの熱取得が減少したことで、アルミモデルでは現状モデルから、一日の平均屋根表面温度が平均3.9℃低下し、一日の平均最上階天井表面温度が平均2.7℃低下した。同様に、高反射塗料モデルでは屋根表面温度が2.0℃低下し、天井表面温度は1.6℃低下した。さらに、天井表面温度が低下したことで、最上階における室温、放射温度も低下した。アルミモデルでは、現状モデルから一日の平均室温が1.4℃低下し、一日の平均放射温度が1.3℃低下した。同様に、高反射塗料モデルでは、室温が0.5℃低下し、放射温度が0.5℃低下した。以上の室温、放射温度に関する実測データより、快適性指標SET*を算出したところ、アルミモデルでは、現状モデルから一日平均1.7℃の改善効果が見られ、高反射塗料モデルでは、一日平均0.4℃の改善効果が見られた。4.シミュレーションによる年間住宅内冷房エネルギー消費量の削減効果の検証 年間の住宅内冷房エネルギー消費量の削減効果を算出する為に、実測調査の結果を踏まえ、屋根面の日射反射率と開口部の換気流量係数の変更を加えた修正モデル作成した。そのモデルを用いてシミュレーションを行った結果、年間住宅内冷房エネルギー消費量は、現状モデルで7.7[GJ/年]、アルミモデルで4.7[GJ/年]、高反射塗料モデルで6.0[GJ/年]という結果となった。また、この年間住宅内冷房エネルギー消費量を電気代に換算すると、現状モデルでは405.7[USD/年]、アルミモデルでは249.1[USD/年]、高反射塗料モデルでは315.7[USD/年]となった。5.まとめ カンボジアにおける蒸暑パッシブ住宅技術としては、アルミシートを屋根面の5cm浮かせて設置することが室内温熱環境改善に効果的であり、冷房エネルギー消費量の削減効果も高いことが明らかとなった。

  • サステイナブル建築のプロセスマネジメント研究

    2007  

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     本研究では、サステイナブル建築のプロセスマネジメント研究の一環として、屋上緑地の導入理由および経緯、管理状況、問題点を把握するため、屋上緑地を有する建物の所有者に対して屋上緑化の維持管理・運営に関するアンケート調査を郵便調査法により実施した。送付数は301件で回収数は64件、回収率は21.3%、回答数は57件であった。回答が得られた建物においては、屋上を全面的に緑化している例は無く、平均緑化率(緑化率=屋上緑地面積/屋上面積)は21.6%であった。施工件数、合計緑地面積ともに100~500㎡未満の物件が最も多く、26件で、その合計緑地面積は9,785㎡であった。 その導入目的であるが、全体では「ヒートアイランド対策」、「省エネ対策」、「条例への対応」の回答割合はそれぞれ18%、15%、15%の順に多い。また「その他」では、教育文化施設の建物の照り返しの緩和や、緑地の確保、環境教育の場があげられており、屋上緑化による環境改善効果に期待していることがわかる。用途別で見ると、商業施設以外の用途の環境改善効果に関する回答は、ほぼ同じで全体の半分近くを占めている。一方、商業施設は、「建物利用者から見た景観の向上」、「建物利用者への景観の向上や憩いの場の提供」などの、屋上緑化による利用者へ効果が環境改善効果に関する回答に比べて、多くを占めている。 その他特徴的な動きとしては、商業施設を中心に屋上緑化複合利用をした事例が見られることである。代表例としては、六本木ヒルズ、難波パークスなどが挙げられる。それらの施設では屋上緑地を地域住民やNPOなどに積極的に開放し、農地利用やイベント会場などに活用しており、屋上緑地を複合的に活用しようとする動きが見られる。 次年度においてはこの複合利用の計画、運用状況について詳細な調査を行い、その中からプロセスマネジメントに関する普遍的な知見を得たいと考えている。

  • ホームページにおけるVRML(仮想現実設計言語)を利用したまちづくり研究

    2000  

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     VRML(Virtual Reality Modeling Language)は、3次元空間をWebブラウザー内でシミュレートする技術であるが、インターネットなどのネットワークを用いて、不特定多数に3次元空間をモニター上で再現することが可能であることから、街並みや建物などのシミュレーション結果を広く住民などに体験させる技術として注目を集めている。 本研究では、富山県富山市の中心市街地に位置する太田口通り商店街の再生をテーマとしたまちづくりにおいて、このVRML技術がどのように活用可能であるかを検討した。具体的作業として、VRMLを用い、太田口通り1丁目をWeb上に再現することからはじめ、協力商店においては、この再現された空間から各商店のWebサイトへのハイパーリンクを行った。これらの作業結果は、太田口通り商店街に設置したまちづくり拠点「ギャラリー太田口」にパソコンを設置、広く来訪者に体験してもらうと共に、意見を求めた。 体験者の多くが、VRMLに感心するというよりは3次元空間のシミュレーションに感心していた。実際に自宅などでネットワークを介しての体験ではないため、博物館などに設置されている端末と同一視されたようである。しかし、街並みのシミュレーションがWeb上で閲覧できることに対しては、概ね好意的であった。 VRMLの現時点での問題点である、処理速度については、体験中でも問題となり、精緻な街並みを再現した場合にはまだ実用段階にないとの意見も聞かれた。いわゆるWeb上でのショッピングモールなどでVRMLを利用する場合、形状を単純化したり、ライブラリ的なパーツを用いることにより、処理速度を克服しているが、多様な街並みの場合は、これらのパーツの組み合わせを用いることができず、処理速度が大きな問題となった。 この処理速度を克服する街並みライブラリーの充実が今後の課題であるが、Web上での3次元空間シミューレート技術はいくつかの有力技術が標準を目指して競い合う過渡期にあり、今後の技術の発展によっては、まちづくりにおいて重要な合意形成ツールとなる可能性があると考えられる。

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