Performance Characteristic Modeling Of Hybrid Proton Conducting Solid Oxide Fuel Cell (Psofc) And Micro Gas Turbine (Mgt) System Using A Double Bypass Valve For Heat Management

Pranoto, Bayu (2016) Performance Characteristic Modeling Of Hybrid Proton Conducting Solid Oxide Fuel Cell (Psofc) And Micro Gas Turbine (Mgt) System Using A Double Bypass Valve For Heat Management. Magister thesis, Universitas Brawijaya.


Conducting Proton-Solid Oxide Fuel Cell (pSOFC), by attaching Micro Gas Turbine (MGT) is oneof outstanding hybrid system nowadays. intermediate temperature of pSOFC(around 700 – 800 [0C])is used to raise performance of micro gas turbine in apowerplantsystem. pSOFC has a lower temperature characteristic than old type of SOFC, which can afford more rapid start up/down and improve durability. A new model is proposed in research based on models developed by earlier researchers. proposed hybrid system is simulated using Matlab-Simulink. Simulations were performed to study behavior of pSOFC-MGT hybrid system by changing respective parameters such as pressure, steam to carbon ratio, and fuel utilization.In our research, we proposed, three different configurations by changing bypass position in my proposed system i.e., with placing bypass(i) after combustor, (ii) after turbine, and (iii) after combustor and turbine. results show that higher operating pressure will reduce system efficiency for configuration 1 and 2, and increase efficiency for configuration 3. effect of raising Steam to Carbon Ratio will reduce efficiency of configuration 1 for anoperating pressure of 1 – 2 [bar], but it increases efficiency of configuration 2 and configuration 3. higherfuel utilization will increase efficiency for all configurations. For bypass ratio variation, increase in bypass ratio will increase efficiency of all configurations. Considering all results ofconfiguration 3 provide best performance compared to configuration 1 and 2 in all three models. efficiencies of configuration 1, configuration 2, and configuration 3 are 49%, 63%, and68% respectively. study obtained that using overall heat exchanger over 5 W/K will not give an effect to configuration 3 performance so much. cost analysis can be taken into consideration bychoosing an appropriate device to build a configuration 3 model. exergy analysis has a same tendency with energy analysis, but it will different in value. Due to exergy destruction during process, value of energy is higher than exergy. To know an amount of exergy destruction, it carried out calculations based on amount of entropy generation and found devices that have lost exergy from largest to smallest in a sequence is combustor 60.2[kW], pSOFC 22.8 [kW] Compressor 21.7 [kW], Pump 5.5 [kW], Fuel Heater 0.9 [kW], reformer 0.7 [kW], water heater 0.4 [kW], air heater 0.23 [kW], and MGT 0.21 [kW].

Item Type: Thesis (Magister)
Identification Number: TES/FT/2015/627.86/041604372
Subjects: 600 Technology (Applied sciences) > 627 Hydraulic engineering > 627.8 Dams and reservoirs
Depositing User: Nur Cholis
Date Deposited: 24 Jun 2016 08:51
Last Modified: 24 Jun 2016 08:51
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