2022/01/23 更新

写真a

ユリアント ムハマド
ユリアント ムハマド
所属
理工学術院 理工学術院総合研究所
職名
次席研究員(研究院講師)

学歴

  • 2009年09月
    -
    2013年01月

    Universitas Indonesia   Mechanical Engineering   Energy Convertion  

  • 2007年02月
    -
    2009年04月

    University of Trisakti   Mechanical Engineering   Energy Convertion  

  • 2005年07月
    -
    2006年11月

    University of Muhammadiyah Metro   Mechanica Engineering   Manufacturing  

  • 2002年10月
    -
    2005年09月

    Polytechnic State of Bandung (Polytechnics of ITB)   Mechanical Engineering   Maintenance  

経歴

  • 2011年01月
    -
    2019年03月

    University of IPB   Department of Mechanical and Biosystem Engineering   Lecturer

  • 2009年10月
    -
    2010年10月

    University of Sultan Agung Tirtayasa   Mechanical Engineering   Lecturer

  • 2008年03月
    -
    2009年08月

    PT. LG Electronics Indonesia   Research and Development

  • 2007年01月
    -
    2008年02月

    PT. Kawan Lama Sejahtera   Product Measuring and Testing

  • 2005年11月
    -
    2006年02月

    PT. Phillips Seafood Indonesa   Maintenance Staff

 

研究分野

  • 熱工学

研究キーワード

  • Refrigeration

  • Energy

  • Mechanical Engineering

論文

  • Design Modification of Greenhouse Effect Solar-Hybrid Rack Type Dryer

    D. Wulandani, S. E. Agustina, M. Yulianto, L. O. Nelwan, L. M. Rahman

    IOP Conference Series: Materials Science and Engineering   557  2019年06月

     概要を見る

    © Published under licence by IOP Publishing Ltd. Hybrid solar-type rack dryers are modified to improve efficiency and to save the drying energy. Modifications are made to the main components, namely; furnace and heat exchanger. The dimension of dryer was 1.8 m length, 0.7 m width and 1.8 m high. The dryer was equipped by 22 racks with dimension of 0.5 m x 0.65m. The furnace was modified to a cylindrical shape instead of rectangular shape and was designed with optimization of heat utilization and comfortable to be operated. To reduce heat loss, the wall of furnace was designed contact directly the drying room. The furnace material was iron galvanized plate with a thickness of 2 mm. The foregoing design of heat exchanger was tube bank type with horizontal fins attached on tubes. In this research, the adoption of vertical fins has enlarged the heat transfer area and increase the effectiveness of heat exchanger. The smoke flow from the combustion chamber of furnace was directed at the opposite side of the ambient air inlet for drying, so that smoke does not enter the drying chamber.

    DOI

  • Experimental study of thermoacoustic cooling with parallel-plate stack in different distances

    A. Amirin, T. Triyono, M. Yulianto

    IOP Conference Series: Materials Science and Engineering   539  2019年01月

     概要を見る

    © Published under licence by IOP Publishing Ltd. Thermo-acoustic is one of Non-Vapor compression cooling technologies also environmentally friendly technology developed rapidly to the present time due to its only use the sound wave to get the magnitude of cooling temperature with the oscillatory motion of the working gas pass through the stack inside a resonator is made in such manner, not use moving part such as the compressor. No lubrication system, low electricity consumption, and without the use of any chemical refrigerants so that the constructions, it will be more simplified and cheaper. The Stack is considered as the heart of the thermo-acoustic system which is the important heat transfer processes will be occur in this area. The variation of the shape, stack distances, kind of material stack applied on the system will be influenced the output of temperature as well. The writer will build a thermo-acoustic refrigerator with the parallel plate stack that is made from PVC Rigid sheets. This study will be done to see how the stack performance with temperature different aspect that would be achieved in the stack, the expectation on this experiment that the performance will have optimum result. The Writer also tried to conduct simulation with the DeltaEC's Software.

    DOI

  • The Influence of the Density of Coconut Fiber as Stack in Thermo-Acoustics Refrigeration System

    E. Hartulistiyoso, M. Yulianto, L. Sucahyo

    IOP Conference Series: Earth and Environmental Science   147  2018年05月

     概要を見る

    © Published under licence by IOP Publishing Ltd. An experimental study of using coconut fiber as stack with varying density in thermo-acoustics refrigeration system has been done. Stack is a device which is described as the "heart" in thermo-acoustics refrigeration system. The length of stack is a fix parameter in this experiment. The performance of the coconut fiber was evaluated from the density of stack (varied from 30%, 50% and 70%), position of stack (varied from 0 to 34 cm from the sound generator), and frequency of sound generator (varied from 150 Hz, 200Hz, 250Hz and 300Hz). The inside, outside, and environment temperatures were collected every second using Data Acquisition (DAQ). The result showed that the increase of stack density will increase the performance of thermo-acoustics refrigeration system. The higher density produced temperature differences in cold side and hot side of 5.4°C. In addition, the position of stack and frequency of sound generator have an important role in the performance of thermo-acoustics refrigeration system for all variations of the density.

    DOI

  • CFD-based Analysis of Non-Premixed Combustion Model in Biomass Grate Furnaces

    M. Hafiz, L. O. Nelwan, M. Yulianto

    IOP Conference Series: Earth and Environmental Science   147  2018年05月

     概要を見る

    © Published under licence by IOP Publishing Ltd. Biomass grate furnace is widely used as heat source for various uses including grain drying. In this study, a CFD simulation using Fluent 18.0 academic was performed on a biomass ladder grate furnace, which can be used later to improve the design as well as the operation technique of the furnace. A downscaled overfeed type furnace with size of 15 x 30 x 50 cm was built to validate the model. The turbulence model used in this study was k-epsilon while the combustion model of non-premixed combustion was used. The simulation was performed with the biomass feed rate of 4 kg/h and air flow velocity of 7.5 m/s at 3.81 cm inlet diameter. The simulation result at outlet temperature was 673 °C and inside temperature were 775 and 717 °C, while the composition of gases was 0.18 for CO, 0.2 for CO2, 0.001 for CH4, 0.09 for H2O, 0.51 for N2 and 0.029 for other gases. Test results from a biomass ladder grate furnace were used to validate the model and the results are 646 °C for the outlet temperature, 712 and 582 °C for inside temperature. Comparison between simulation and measurement results shows good value with average percentage of deviation 12.12%.

    DOI

  • Simulation of Oil Palm Shell Pyrolysis to Produce Bio-Oil with Self-Pyrolysis Reactor

    R. Fika, L. O. Nelwan, M. Yulianto

    IOP Conference Series: Earth and Environmental Science   147  2018年05月

     概要を見る

    © Published under licence by IOP Publishing Ltd. A new self-pyrolysis reactor was designed to reduce the utilization of electric heater due to the energy saving for the production of bio-oil from oil palm shell. The yield of the bio- oil was then evaluated with the developed mathematical model by Sharma [1] with the characteristic of oil palm shell [2]. During the simulation, the temperature on the combustion chamber on the release of the bio-oil was utilized to determine the volatile composition from the combustion of the oil palm shell as fuel. The mass flow was assumed constant for three experiments. The model resulted in a significant difference between the simulated bio-oil and experiments. The bio-oil yields from the simulation were 22.01, 16.36, and 21.89 % (d.b.) meanwhile the experimental yields were 10.23, 9.82, and 8.41% (d.b.). The char yield varied from 30.7 % (d.b.) from the simulation to 40.9 % (d.b.) from the experiment. This phenomenon was due to the development of process temperature over time which was not considered as one of the influential factors in producing volatile matters on the simulation model. Meanwhile the real experiments highly relied on the process conditions (reactor type, temperature over time, gas flow). There was also possibilities of the occurrence of the gasification inside the reactor which caused the liquid yield was not as high as simulated. Further simulation model research on producing the bio-oil yield will be needed to predict the optimum condition and temperature development on the newly self-pyrolysis reactor.

    DOI

  • The performance of solar collector CPC (compound parabolic concentrator) type with three pipes covered by glass tubes

    Yogi Sirodz Gaos, Muhamad Yulianto, Mulya Juarsa, Nurrohman, Edi Marzuki, Dwi Yuliaji, Kabul Budiono

    AIP Conference Proceedings   1826  2017年03月

     概要を見る

    © 2017 Author(s). Indonesia is a tropical country that has potential energy of solar radiation worth of 4.5 until 4.8 kWh/m2. However, this potential has not been utilized regularly. This paper will discuss the performance of solar collector compound parabolic concentrator (CPC) type with water as the working fluid. This CPC solar collector utilized three pipes covered by glass tubes. This paper has contribution to provide the temperature achievement between three pipes covered by glass tubes with and without glass cover of solar collector CPC type. The research conducted by varying the water flow rate of 1 l/m up to 6 l/m with three pipes arranged in series and parallel. From the results, the used of solar collector CPC type in the current study shows that the decrease of solar radiation, which was caused by climate change, did not influence the heat absorbance by water in the pipe. Therefore, the design of the solar collector in this research has potential to be used in future when solar radiation are used as the energy source.

    DOI

  • Study of temperature characterization of agricultural waste in the development of stove for combine heat power

    Muhamad Yulianto, Sri Endah Agustina, Edy Hartulistiyoso, Leopold, Oscar Nelwan, Nurlela

    AIP Conference Proceedings   1826  2017年03月

     概要を見る

    © 2017 Author(s). Indonesia is one of tropical country in the world, therefore biomass product can find a lot in Indonesia. In the other side, waste of agricultural product is one of biomass resources which is can be converting to energy using Combine Heat Power for the example. In this paper, will be discussed about the temperature characterization due to influence of feeding rate and air flow rate. The contribution of this paper will show the temperature achievement of flue gas as the result of direct combustion in a stove. The research conducted using coconut shell as raw fuel material with varying feed rate and air flow rate. In this research also use the excess air to know the effect. The result show that the temperature of flue gas in direct combustion of coconut shell can reach of 520°C and temperature at combustion chamber reach 840°C. This achievement is occurring in the certain variation of experiment.

    DOI

  • Temperature distribution of the plastics Pyrolysis process to produce fuel at 450 degrees C

    Edy Hartulistiyoso, Febri A. P. A. G. Sigiro, Muhamad Yulianto

    5th Sustainable Future for Human Security (SustaiN 2014)   28   234 - 241  2015年  [査読有り]

     概要を見る

    This paper aims to investigate the temperature distribution in the reactor of a plastics pyrolysis process from waste bottles of beverage to produce fuel. This process is considered an alternative technology to replace fossil fuel. This experiment was conducted using a cylindrical reactor, which has dimension of 0.31 m in diameter and 1 m high. In order to understand the temperature distribution in the reactor, five thermocouples were placed to measure temperature at the bottom and the top of the reactor as well as in the middle, with the different position of each thermocouple of 0.19 m respectively. The temperature outside the reactor and outside the condenser was also measured. Data Acquisition recorded all temperature data. The reactor was used to process 1,500 g plastics. The Computational Fluid Dynamic (CFD) was also used to know the contour of temperature inside the reactor. The result showed that to increase temperature from the ambient temperature to 450 degrees C, 72 minutes of time were needed. The lowest temperature of 310 degrees C was measured at the top of the reactor, whereas different temperature in the middle of the reactor was found to be 46 degrees C respectively. The pyrolysis process of 1,500 g plastics was completed in 110 minutes to produce 21 g of fuel. This fact shows that the pyrolysis process of plastics can produce fuel at 450 degrees C in the reactor and 75 degrees C outside the reactor. (C) 2015 The Authors. Published by Elsevier B.V.

    DOI

  • Effect of hot air reservoir and insulator tray in the development of vacuum freeze drying

    Muhammad Idrus Alhamid, Nasruddin, Engkos A. Kosasih, Muhamad Yulianto

    Applied Mechanics and Materials   388   139 - 145  2013年10月

     概要を見る

    The Objective of this work is to know the effect of inserting hot air from reservoir to the process of vacuum freeze drying. Tentacle of jelly fish as a sample with constant weight of 50 g and placed at insulator and teflon container which isolated. The samples were freezed and dried with condition at experiment varying between inserting and without inserting hot air at temperature of 27°C and also heating from heat loss condenser. The result of experiment shows that while inserting hot air into vacuum freeze drying makes the pressure to rise until the pressure reaches 40 mbar. This phenomenon makes the material evaporation and this event cannot be done in vacuum freeze drying. When without hot air reservoir the pressure can reach 3.5 mbar and the subimation can be done in this process. Vacuum freeze drying process without hot air reservoir needs time 12.5 hours and for vacuum freeze drying with hot air reservoir needs time 11 hour to drying 50 g of jelly fish tentacle. For process with insulator tray the material can be done in 22,7 hour with internal freezing. From this experiment, it can be concluded that for vacuum freeze drying with inserting hot air needs more ability of vacuum pump specially in flowrate and ultimate vacuum to keep the chamber pressure below the triple point condition. © (2013) Trans Tech Publications, Switzerland.

    DOI

  • Development of a compact vacuum freeze drying for jelly fish (schypomedusae)

    M. Idrus Alhamid, M. Yulianto, Nasruddin, Engkos A. Kosasih

    Jurnal Teknologi (Sciences and Engineering)   58   25 - 32  2012年12月

     概要を見る

    A new design of a vacuum freeze drying with internal cooling and heater from condenser's heat loss was built and tested. The dryer was used to dry jelly fish (scyphomedusae) to study the effect of drying parameter such as temperature within the drying chamber on mass losses (evaporation) during freezing stage and moisture ratio at the end of drying process and also the drying rate of vacuum drying process. The cold trap temperature rise in when activated the heating from condenser's heat loss. The midili thin layer mathematical drying model was used to estimate and predict the moisture ratio curve base on different drying chamber temperature. The result of this experiment show that mass loss during freezing stage decreased with a decrease in drying chamber temperature with constant pressure. Drying time reduced with an increase in drying temperature. Drying chamber temperature decreasing has a result pressure saturation of material lower than drying chamber pressure have an effect mass transfer should not occurs. © 2012 Penerbit UTM Press.

  • Development of a Compact Freeze Vacuum Drying for Jelly Fish (Schypomedusae)

    M. Idrus Alhamid, M. Yulianto, Nasruddin

    4TH INTERNATIONAL MEETING OF ADVANCES IN THERMOFLUIDS (IMAT 2011), PT 1 AND 2   1440   1246 - 1256  2012年

     概要を見る

    A new design of a freeze vacuum drying with internal cooling and heater from condenser's heat loss was built and tested. The dryer was used to dry jelly fish (schypomedusae), to study the effect of drying parameters such as the temperature within the drying chamber on mass losses (evaporation) during the freezing stage and the moisture ratio at the end of the drying process. The midili thin layer mathematical drying model was used to estimate and predict the moisture ratio curve based on different drying chamber temperatures. This experiment shows that decreasing the drying chamber temperature with constant pressure results in less mass loss during the freezing stage Drying time was reduced with an increase in drying temperature. Decreasing the drying chamber temperature results in lower pressure saturation of the material has no effect of drying chamber pressure on mass transfer.

    DOI

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