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Author: search.filters.author.Arpornwichanop, AmornchaiSubject: search.filters.subject.Ethanol

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    Integrated System of Solid Oxide Fuel Cell and Ethanol Partial Oxidation: Process Simulation and Heat Exchanger Network
    (2024-01-01)
    Saebea, Dang
    ;
    Thanomjit, Chollaphan
    ;
    Arpornwichanop, Amornchai
    ;
    Patcharavorachot, Yaneeporn
    A solid oxide fuel cell (SOFC) fueled by reformate obtained from an ethanol partial oxidation (POX) was investigated regarding electrical and the thermal performances. Performance analysis was performed through Aspen Plus simulator. Gas compositions obtained from POX and SOFC were computed through the Gibbs free energy minimization method. Three voltage losses that include activation, ohmic and concentration losses was considered in an electrochemical model. Effects of operating parameters in both POX and SOFC on performance of SOFC-POX system were examined. From the simulation results, it was found that the suitable condition of POX was at the reformer temperature of 700 ℃ and oxygen to ethanol molar ratio of 0.1. While, the operating temperature of SOFC should be 900 ℃. Under these operating conditions, the maximum electrical and thermal efficiencies of 67.24% and 25.77%, respectively, can be achieved. Finally, the heat integration of the SOFC-POX system was considered using pinch analysis. The minimum cold utility is 88.1 kW while the hot utility is no need for this system.
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    Effect of anode-cathode exhaust gas recirculation on energy recuperation in a solid oxide fuel cell-gas turbine hybrid power system
    (2016-01-01)
    Saebea, Dang
    ;
    Authayanun, Suthida
    ;
    Patcharavorachot, Yaneeporn
    ;
    Arpornwichanop, Amornchai
    A solid oxide fuel cell-gas turbine (SOFC-GT) hybrid system supplying liquid fuel as ethanol exhibits promise as an auxiliary power unit. In this study, the recirculation of anode and cathode exhaust gas in the SOFC-GT system is proposed to improve the efficiency of heat management in the SOFC-GT hybrid system. The key operating parameters, such as fuel utilization factor and the cell and GT temperatures, are analyzed in terms of the performance of the SOFC-GT hybrid systems. The simulation results show that the recirculation of anode and cathode exhaust gas has a direct impact on the turbine performance. To maintain the inlet temperature of the small turbine in the range of 873-1223 K, the amount of fuel and air added to the combustor to control the turbine inlet temperature on the system performance is also investigated. A SOFC-GT hybrid system with both anode and cathode exhaust gas recirculation achieves the highest system and thermal efficiency.
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    Thermodynamic analysis of solid oxide fuel cell system using different ethanol reforming processes
    (2015-06-08)
    Thanomjit, Chollaphan
    ;
    Patcharavorachot, Yaneeporn
    ;
    Ponpesh, Pimporn
    ;
    Arpornwichanop, Amornchai
    In this study, a performance of a solid oxide fuel cell (SOFC) system integrated with different ethanol reforming processes (i.e., steam reforming (SR), partial oxidation (POX) and autothermal reforming (ATR)) is investigated with the aim to determine a suitable ethanol reforming process for the SOFC system. The thermodynamic analysis of the SOFC system operated under steady state conditions was performed using flowsheet simulator. A detailed electrochemical model incorporating all voltage losses (i.e., activation, ohmic and concentration losses) was considered. The simulation results showed that increases in reformer and SOFC temperatures can improve the electrical performance of the SOFC system. The electrical performance of the SOFC-SR is maximized because this reforming process provides the highest hydrogen yield. However, because the SOFC included an internal methane reformation, electrical performances of SOFC systems with different reforming systems are slightly different. When the thermal efficiency was determined, it was revealed that the SOFC-POX system had a higher thermal efficiency with an increasing O/E and decreasing reformer and SOFC temperatures.