Efficiency Enhancement on Hybrid Power System Composed of Irreversible Solid Oxide Fuel Cell and Stirling Engine by Finite Time Thermodynamics

Hsin-Yi Lai, Yi-Ting Li and Yen-Hsin Chan
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Hsin-Yi Lai: Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan
Yi-Ting Li: Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan
Yen-Hsin Chan: Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan

Energies, 2021, vol. 14, issue 4, 1-14

Abstract: This paper presents the work for efficiency enhancement on a hybrid power system with an irreversible Solid Oxide Fuel Cell (SOFC) and Stirling Engine (SE) for various system design using the approach of finite-time thermodynamics. The SOFC-based cogeneration system was integrated with an SE and several heat components. The effects of design configurations using various interface components on system performance were investigated. By analyzing the SE with finite-time thermodynamics and considering multiple irreversible factors of output power given by the SOFC, the efficiency of the calculation can be more practical and accurate. In this study, the working efficiency of the proposed hybrid system was enhanced by 16.37% compared to that of the conventional system at an intermediate temperature of 873 K. The design approach proposed herein is considered an essential package for building highly efficient power systems working in the intermediate temperature range.

Keywords: finite-time thermodynamics; hybrid system; Solid Oxide Fuel Cell; Stirling Engine (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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