固体氧化物燃料电池-温差热电混合系统的性能优化

本文建立了一类不可逆固体氧化物燃料电池(SOFC)与半导体温差热电发电器(TEG)的混合发电系统模型,基于非平衡态热力学理论,导出混合系统一些重要性能参数诸如输出功率、效率和最小电流密度等的一般表达式,分析系统的性能特性和优化性能,给出系统在最大输出功率或最大效率时的优化条件,确定系统一些重要性能参数的优化工作区域,详细讨论系统的一些主要不可逆性对系统优化性能的影响,得到一些有意义的新结论.所得结果可为实际混合发电系统的设计和优化运行提供理论依据.

The optimal performance of solid oxide fuel cell-thermoelectric generator hybrid system

The model of a class of irreversible solid oxide fuel cell（SOFC） and the semiconductor thermoelectric generator（TEG） hybrid power system is established. The general expressions of several important performance parameters of the system such as the power output, efficiency, and minimum electric current density of the hybrid system are derived, based on the theory of non-equilibrium thermodynamics. The performance characteristics and optimal the performance of the hybrid system are analyzed. The optimum conditions for maximum efficiency or maximum output power of the hybrid system are given. The optimal regions of several important performance parameters of the hybrid system are determined. The influences of some of the main irreversibility on the optimal performance of the system are discussion in detail. Some significant new conclusions are obtained. The results obtained will provide theoretical foundation for the design and optimization of practical power hybrid system.