Modeling and analysis of a combined power generation system performance equipped with three electrical energy generators

Document Type : Research Article

Authors

Department of Aerospace Engineering, Malek Ashtar University of Technology, Tehran, Iran

Abstract

The purpose of this paper is thermodynamic modeling of a new hybrid system to provide electrical power. The new hybrid system consists of a solid oxide fuel cell and gas turbine cycle equipped with a Stirling engine. For all components of the cycle, a thermodynamic analysis and for utilized fuel cell, electrochemical and thermal analyses have been done. Then, with the parametric study of hybrid system, the effect of compressor pressure ratio, turbine inlet gas temperature, type of fluid used in the Stirling engine and the number of cells in fuel cell on the efficiency and net power output of the hybrid system is studied. The results show that the electrical efficiency of the new hybrid system will increase by increasing the compressor pressure ratio and turbine inlet gas temperatures up to about 81 percent. Also, in the case of using helium in Stirling engine, its weight will reduce and efficiency will increase about 15 percent. The results also show that increasing the number of cells in fuel cell causes increase in electrical power and overall efficiency of the hybrid system.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 49, Issue 1
April 2017
Pages 185-202

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