Is Bunyamin Suryo | Institut Teknologi Sepuluh Nopember (original) (raw)
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Papers by Is Bunyamin Suryo
Lecture notes in electrical engineering, 2022
Progress in Computational Fluid Dynamics, An International Journal
Prosiding - Seminar Nasional Teknik Elektro UIN Sunan Gunung Djati Bandung, Jan 8, 2021
IOP Conference Series: Materials Science and Engineering, 2021
The domination of coal-fired power plant as power generation due to its feasibility to ensure a s... more The domination of coal-fired power plant as power generation due to its feasibility to ensure a stable supply of electricity to customer. Unfortunately, the use of coal as power plant fuel faces an issue of air pollution. Some efforts have been proposed to make the operated coal-fired power plant meeting the environmental regulations. One of the most potential ways to solve the problem is by improving the coal-fired power plant efficiency and then equate to a greenhouse gas reduction. Thus, heat balance simulation of coal-fired power plant which operates in different conditions have to be studied in order to analyse the power plant performance. In this paper, the heat balance of a 315 MW low rank coal-fired power plant is simulated by Cycle-Tempo. The simulations are carried out for several different operation conditions of the power plant. The Heat Rate will increase of 3.66% when all HPH are on off-duty while it increases by 2.63% when all LPH are on off-duty. Furthermore, the inc...
Pada sebuah profil silinder yang diam, bila dialiri aliran fluida dengan bilangan Reynolds (Re) t... more Pada sebuah profil silinder yang diam, bila dialiri aliran fluida dengan bilangan Reynolds (Re) tertentu, akan menghasilkan gaya hambat (drag), tetapi tidak terjadi gaya angkat (lift). Hal ini dikarenakan tekanan yang terjadi pada permukaan setengah bagian alas dart silinder tersebut sama dengan tekanan pada setengah bagian bawah silinder. Hal ini menunjukkan bahwa karakteristik dari aliran di sekitar permukaan silinder sangat dipenggaruhi gaya-gaya tersebut. Profil silinder utama akan mengalami lift jika pada silinder ini diberikan gangguan pada alirannya. Pengganggu aliran yang dimaksud adalah sebuah silinder kecil dengan penampang teriris (type J) yang dipasang menyudut, Dimana irisan tersebut selalu menyinggung lintasan putar, dalam posisi sudut stagger yang divariasikan terhadap free stream, akan menimbulkan lift pada silinder utama. Hal ini akibat perbedaan tekanan pada permukaan setengah bagian bawah dan bagian atas silinder. Untuk membuktikan fenomena tersebut, maka peneliti...
Ejector are an essential part in refrigeration and air conditioning, desalination, petroleum re p... more Ejector are an essential part in refrigeration and air conditioning, desalination, petroleum re petrochemical and chemical industries. The ejectors form an integral part of distillation columns, condensers and other heat exchange processes. In this work, theoritical and experimental analysis are developed to evaluate the design and performance of ejector. The ejector system based on the constant area ejector performed. The analysis presented here has been evaluated pressure drop and efficiency of ejector. The working fluid are carbon dioxide (CO2) representation as heavy gas and nitrogen (N2) as light gas which are utilized as a primary and secondary fluid respectively. And the other configuration to replace nitrogen as primary fluid and carbon dioxide as secondary fluid. Theoritical and experimental results indicated that nitrogen as primary fluid obtained higher entrainment ratio than carbondioxide.
The International Journal of Mechanical Engineering and Sciences, 2018
The electroencephalography (EEG) is a non-invasive technique to study electrical brain activity (... more The electroencephalography (EEG) is a non-invasive technique to study electrical brain activity (while the brain is performing a cognitive task). The electrical brain activity is a complex process of electrical propagation because the brain structure is an incredibly complex structure. This complex structure leads to different conductivity properties in terms of its magnitude and orientation, called anisotropic conductivity. Using Maxwell's equations, electrical brain activity has been studied intensively. For simplification, the quasistatic Maxwell’s equations are used to model the electrical brain activity and it leads to deal with a Poisson’s equation. In this research, a feasibility study of using a new method, called Operator Splitting Method (OSM), to solve anisotropic 2-Dimensional (2D) Poisson’s equation is performed. Freeware of the finite element method (FEM), FreeFEM++, is employed to build matrices used in the OSM algorithm. The OSM algorithm which is written in Mat...
AIP Conference Proceedings, 2019
The electroencephalography is a non-invasive technique to study electrical brain activity. The el... more The electroencephalography is a non-invasive technique to study electrical brain activity. The electrical brain activity is a complex process of electrical propagation because the brain structure is an incredibly complex structure. This complex structure leads to different conductivity property in term of its magnitude and orientation, called anisotropic conductivity. Using Maxwell's equations, the electrical brain activity has been studied intensively. For simplification, the quasistatic Maxwell's equations are used to model the electrical brain activity and it leads to deal with a Poisson's equation. In this research, a feasibility study of using Operator Splitting Method (OSM) to solve anisotropic 2-Dimensional (2D) Poisson's equation is performed. A freeware of finite element method (FEM) is employed to build matrices used in the OSM algorithm. The OSM algorithm which is written in Matlab is then tested to solve anisotropic 2D Laplace's equation and anisotropic Poisson's equation with dipolar source. Some numerical experiments have been performed to test the performance of the OSM algorithm. The OSM solution of anisotropic 2D Laplace's equation coincide with the exact and direct numerical solution of the problem. For anisotropic 2D Poisson's equation with dipolar source, some similar results has been obtained too. The pattern of the OSM solutions are similar to the pattern of direct numerical solutions of the problem. The results arise a hope to attempt implementing the OSM algorithm for more complex problem such as a realistic human head model.
The International Journal of Mechanical Engineering and Sciences, Sep 28, 2019
In general, the hydrocarbon molecules in the fuel perform vibrational activity towards the core a... more In general, the hydrocarbon molecules in the fuel perform vibrational activity towards the core and attract each other, forming clustering molecules. Induction of a magnetic field in the fuel flow can change the hydrocarbon molecules so that their arrangement becomes more regular (de-clustering). The induction of the magnetic field in this research utilized a coil that was fed by an output current from the SINJAI-150 engine alternator. Magnetic field placement was placed before Bioethanol E100 fuel entered the injector. Observation of the magnetization of the fuel was carried out molecularly with the FTIR (Fourier Transform-Infra Red Spectroscopy) test and observing the characteristics of the fuel spray at the injector output. The results obtained were an increase in the fuel transmittance of Bioethanol E100 up to 41.31% for C-H compounds, 48.8% for CO compounds, and 114% for O-H compounds compared to standard conditions. In the spray characteristics, there was an increase in the spray angle up to 2 and a decrease in the Sauter Mean Diameter (SMD) to 1.312 mm, due to a decrease in the value of the fuel properties in the form of surface tension, viscosity, and density up to 2.6%, 10.28% and 10.15% from the standard state without magnetization. As a result of decreasing the density value, the mass flow rate of the fuel decreases to 10.28% from the standard conditions at 2,000 rpm.
IOP Conference Series: Materials Science and Engineering, 2021
The numerical studies of gas-solid two phase flow in a rectangular riser are carried out and eval... more The numerical studies of gas-solid two phase flow in a rectangular riser are carried out and evaluated. Eulerian-Eulerian approach using kinetic theory of granular flow is utilised in the simulation. Syamlal et al. drag model is utilised to calculate the energy exchange between gas and solid phase. Radial distribution model of Syamlal et al. and the restitution coefficient of 0.7 are used to predict the hydrodynamics flow in the riser. The simulation is carried out from 0 s to 40 s using time steps of 0.00015 s and on a single computer. The comparisons of numerical results with experimental data are made using lateral profiles of the solid phase velocity and the gas volume fraction. The simulation result overestimates the experimental value due to the coarse nature of the grid and probably due to uncertainties of the inlet flow properties.
Lecture notes in electrical engineering, 2022
Progress in Computational Fluid Dynamics, An International Journal
Prosiding - Seminar Nasional Teknik Elektro UIN Sunan Gunung Djati Bandung, Jan 8, 2021
IOP Conference Series: Materials Science and Engineering, 2021
The domination of coal-fired power plant as power generation due to its feasibility to ensure a s... more The domination of coal-fired power plant as power generation due to its feasibility to ensure a stable supply of electricity to customer. Unfortunately, the use of coal as power plant fuel faces an issue of air pollution. Some efforts have been proposed to make the operated coal-fired power plant meeting the environmental regulations. One of the most potential ways to solve the problem is by improving the coal-fired power plant efficiency and then equate to a greenhouse gas reduction. Thus, heat balance simulation of coal-fired power plant which operates in different conditions have to be studied in order to analyse the power plant performance. In this paper, the heat balance of a 315 MW low rank coal-fired power plant is simulated by Cycle-Tempo. The simulations are carried out for several different operation conditions of the power plant. The Heat Rate will increase of 3.66% when all HPH are on off-duty while it increases by 2.63% when all LPH are on off-duty. Furthermore, the inc...
Pada sebuah profil silinder yang diam, bila dialiri aliran fluida dengan bilangan Reynolds (Re) t... more Pada sebuah profil silinder yang diam, bila dialiri aliran fluida dengan bilangan Reynolds (Re) tertentu, akan menghasilkan gaya hambat (drag), tetapi tidak terjadi gaya angkat (lift). Hal ini dikarenakan tekanan yang terjadi pada permukaan setengah bagian alas dart silinder tersebut sama dengan tekanan pada setengah bagian bawah silinder. Hal ini menunjukkan bahwa karakteristik dari aliran di sekitar permukaan silinder sangat dipenggaruhi gaya-gaya tersebut. Profil silinder utama akan mengalami lift jika pada silinder ini diberikan gangguan pada alirannya. Pengganggu aliran yang dimaksud adalah sebuah silinder kecil dengan penampang teriris (type J) yang dipasang menyudut, Dimana irisan tersebut selalu menyinggung lintasan putar, dalam posisi sudut stagger yang divariasikan terhadap free stream, akan menimbulkan lift pada silinder utama. Hal ini akibat perbedaan tekanan pada permukaan setengah bagian bawah dan bagian atas silinder. Untuk membuktikan fenomena tersebut, maka peneliti...
Ejector are an essential part in refrigeration and air conditioning, desalination, petroleum re p... more Ejector are an essential part in refrigeration and air conditioning, desalination, petroleum re petrochemical and chemical industries. The ejectors form an integral part of distillation columns, condensers and other heat exchange processes. In this work, theoritical and experimental analysis are developed to evaluate the design and performance of ejector. The ejector system based on the constant area ejector performed. The analysis presented here has been evaluated pressure drop and efficiency of ejector. The working fluid are carbon dioxide (CO2) representation as heavy gas and nitrogen (N2) as light gas which are utilized as a primary and secondary fluid respectively. And the other configuration to replace nitrogen as primary fluid and carbon dioxide as secondary fluid. Theoritical and experimental results indicated that nitrogen as primary fluid obtained higher entrainment ratio than carbondioxide.
The International Journal of Mechanical Engineering and Sciences, 2018
The electroencephalography (EEG) is a non-invasive technique to study electrical brain activity (... more The electroencephalography (EEG) is a non-invasive technique to study electrical brain activity (while the brain is performing a cognitive task). The electrical brain activity is a complex process of electrical propagation because the brain structure is an incredibly complex structure. This complex structure leads to different conductivity properties in terms of its magnitude and orientation, called anisotropic conductivity. Using Maxwell's equations, electrical brain activity has been studied intensively. For simplification, the quasistatic Maxwell’s equations are used to model the electrical brain activity and it leads to deal with a Poisson’s equation. In this research, a feasibility study of using a new method, called Operator Splitting Method (OSM), to solve anisotropic 2-Dimensional (2D) Poisson’s equation is performed. Freeware of the finite element method (FEM), FreeFEM++, is employed to build matrices used in the OSM algorithm. The OSM algorithm which is written in Mat...
AIP Conference Proceedings, 2019
The electroencephalography is a non-invasive technique to study electrical brain activity. The el... more The electroencephalography is a non-invasive technique to study electrical brain activity. The electrical brain activity is a complex process of electrical propagation because the brain structure is an incredibly complex structure. This complex structure leads to different conductivity property in term of its magnitude and orientation, called anisotropic conductivity. Using Maxwell's equations, the electrical brain activity has been studied intensively. For simplification, the quasistatic Maxwell's equations are used to model the electrical brain activity and it leads to deal with a Poisson's equation. In this research, a feasibility study of using Operator Splitting Method (OSM) to solve anisotropic 2-Dimensional (2D) Poisson's equation is performed. A freeware of finite element method (FEM) is employed to build matrices used in the OSM algorithm. The OSM algorithm which is written in Matlab is then tested to solve anisotropic 2D Laplace's equation and anisotropic Poisson's equation with dipolar source. Some numerical experiments have been performed to test the performance of the OSM algorithm. The OSM solution of anisotropic 2D Laplace's equation coincide with the exact and direct numerical solution of the problem. For anisotropic 2D Poisson's equation with dipolar source, some similar results has been obtained too. The pattern of the OSM solutions are similar to the pattern of direct numerical solutions of the problem. The results arise a hope to attempt implementing the OSM algorithm for more complex problem such as a realistic human head model.
The International Journal of Mechanical Engineering and Sciences, Sep 28, 2019
In general, the hydrocarbon molecules in the fuel perform vibrational activity towards the core a... more In general, the hydrocarbon molecules in the fuel perform vibrational activity towards the core and attract each other, forming clustering molecules. Induction of a magnetic field in the fuel flow can change the hydrocarbon molecules so that their arrangement becomes more regular (de-clustering). The induction of the magnetic field in this research utilized a coil that was fed by an output current from the SINJAI-150 engine alternator. Magnetic field placement was placed before Bioethanol E100 fuel entered the injector. Observation of the magnetization of the fuel was carried out molecularly with the FTIR (Fourier Transform-Infra Red Spectroscopy) test and observing the characteristics of the fuel spray at the injector output. The results obtained were an increase in the fuel transmittance of Bioethanol E100 up to 41.31% for C-H compounds, 48.8% for CO compounds, and 114% for O-H compounds compared to standard conditions. In the spray characteristics, there was an increase in the spray angle up to 2 and a decrease in the Sauter Mean Diameter (SMD) to 1.312 mm, due to a decrease in the value of the fuel properties in the form of surface tension, viscosity, and density up to 2.6%, 10.28% and 10.15% from the standard state without magnetization. As a result of decreasing the density value, the mass flow rate of the fuel decreases to 10.28% from the standard conditions at 2,000 rpm.
IOP Conference Series: Materials Science and Engineering, 2021
The numerical studies of gas-solid two phase flow in a rectangular riser are carried out and eval... more The numerical studies of gas-solid two phase flow in a rectangular riser are carried out and evaluated. Eulerian-Eulerian approach using kinetic theory of granular flow is utilised in the simulation. Syamlal et al. drag model is utilised to calculate the energy exchange between gas and solid phase. Radial distribution model of Syamlal et al. and the restitution coefficient of 0.7 are used to predict the hydrodynamics flow in the riser. The simulation is carried out from 0 s to 40 s using time steps of 0.00015 s and on a single computer. The comparisons of numerical results with experimental data are made using lateral profiles of the solid phase velocity and the gas volume fraction. The simulation result overestimates the experimental value due to the coarse nature of the grid and probably due to uncertainties of the inlet flow properties.