熔融碳酸盐燃料电池与斯特林热机耦合系统的性能优化分析  

Performance Optimum Analysis of a Molten Carbonate Fuel Cell-Stirling Heat Engine Hybrid System

作　　者：陈礼炜[1] 

机构地区：[1]三明学院机电工程学院,福建三明365004

出　　处：《三明学院学报》2014年第4期45-53,共9页Journal of Sanming University

基　　金：福建省教育厅科技项目(JA13291)

摘　　要：建立一个主要由熔融碳酸盐燃料电池(MCFC)和斯特林热机组成的新型耦合系统,其中斯特林热机是由在MCFC中产生的高品质废热驱动的。基于电化学和非平衡热力学,考虑各种不可逆损失的影响得到了耦合动力系统的效率和功率输出的解析表达式。研究表明,MCFC的性能可以通过耦合斯特林热机以进一步将废热转化为电输出而大幅度提高。此外,采用数值计算,不仅分析了多个不可逆损失对耦合系统性能的影响,并且还讨论了一些工作条件比如工作温度、输入气体组合以及工作压强对耦合系统性能响。A new hybrid system mainly consists of a molten carbonate fuel cell（MCFC） and a Stirling heat engine is established, where the Stirling heat engine is driven by the high-quality waste heat generated in the MCFC. Based on the electrochemistry and non-equilibrium thermodynamics, analytical expressions for the efficiency and power output of the hybrid system are derived by taking various irreversible losses into account. It is showed that the performance of the MCFC can be greatly enhanced by coupling a Stirling heat engine to further convert the waste heat for power generation. By employing numerical calculations, not only the influences of multiple irreversible losses on the performance of the hybrid system are analyzed, but also the impacts of some operating conditions such as the operating temperature, input gas compositions and operating pressure on the performance of the hybrid system are also discussed.

关 键 词：熔融碳酸盐燃料电池 斯特林热机 耦合系统 性能优化分析 

分 类 号：TM911.4[电气工程—电力电子与电力传动]