Simulation and Thermodynamic Analysis of a Combined Gas Turbine Power with a Solid Oxide Fuel cell and Analysis Irreversibility Hybrid Systems

This paper presents a gas turbine cycle combined with a solid oxide fuel cell with hydrogen fuels is thermodynamically modeled. In this way all components of the system are separately modeled. Fuel cell model presented, as well as show its behavior in different condition performance. Then, the effects of various parameters on efficiency, power and entropy generation was evaluated and for accuracy, the results were compared with results of references and show a good match. Increasing the turbine inlet temperature results in decreasing the thermal efficiency of hybrid system, however it improves the net power output. Moreover, an increase in either the turbine inlet temperature and compression ratio leads to higher rate of entropy generation and increases irreversibility of the hybrid system. The results in the design point showed that 32% of entropy generation takes place in the combustion chamber, 28% in the SOFC and 17% in recuperate. About 60% of the irreversibility takes place in the SOFC and combustion chamber. Hybrid system efficiency is 56.9%, while the system without SOFC efficiency is 31.4%, which is a combination of superior performance system.