磷酸燃料电池的能效、㶲及生态特性分析

Analysis of Energy,Exergy and Ecology Characteristics of Phosphoric Acid Fuel Cell

磷酸燃料电池(phosphoric acid fuel cell,PAFC)因具有启动时间短、无污染和结构简单等优点,成为当前商业化发展最快的一种燃料电池。根据热力学第一定律和第二定律,推导出了PAFC的电效率、输出功率、㶲损率、㶲效率、生态函数和生态性能系数的数学表达式,考虑多种优化目标之间的权衡,得到了燃料电池性能参数在不同情况下的最佳工作区域。此外,还详细地讨论了一些主要工作条件和设计参数对PAFC系统性能的影响。从保护自然资源的角度考虑了能源的利益和损失,研究结果可为高性能的PAFC系统设计提供一些理论支持。

Phosphoric acid fuel cell(PAFC)has become one of the fastest growing commercial fuel cells due to its short start-up time,no pollution and simple structure.According to the first and second laws of thermodynamics,the energy,exergy and ecology performances of PAFC were studied.The mathematical expressions of electric efficiency,output power,exergy destruction rate,exergy efficiency,ecological function and ecological coefficient of performance for fuel cell were derived.Considering the trade-off between various optimization criteria,the optimal working area of PAFC under different performance parameters was obtained.Finally,the effects of some main operating conditions and design parameters on the performance of PAFC system were discussed in detail.This work considers the benefits and losses of energy from the perspective of protecting natural resources,and the results can provide some theoretical support for the design of high-performance PAFC system.