磷酸燃料电池-两级并联热电发电器混合系统性能分析  

Performance analysis of phosphoric acid fuel cell-two stage parallel thermoelectric generator hybrid system

作　　者：崔祥苏 黄跃武[1] 梁珍[1] CUI Xiangsu;HUANG Yuewu;LIANG Zhen(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《东华大学学报（自然科学版）》2021年第4期99-106,共8页Journal of Donghua University(Natural Science)

摘　　要：为回收利用磷酸燃料电池(phosphoric acid fuel cell,PAFC)运行中产生的余热以提高系统整体性能,建立一个由PAFC、回热器与两级并联热电发电器(two-stage parallel thermoelectric generator,TPTEG)组成的混合系统模型。综合考虑PAFC的过电势损失、回热损失、热漏以及半导体的主要不可逆损失,通过数值分析得到PAFC的工作电流密度与TPTEG的工作电流密度之间的关系,确定混合系统中TPTEG的工作电流密度区间,推导混合系统的功率和效率表达式,分析TPTEG对PAFC余热回收的影响。结果表明,PAFC-TPTEG混合系统性能优于单一PAFC系统。研究燃料电池的工作温度、工作压力,热电元件对数、导热系数、优值系数对混合系统的影响,所得结果可进一步为研究PAFC与半导体热电发电器的混合系统性能提供一些理论依据。A hybrid system model consisting of a phosphoric acid fuel cell(PAFC),a regenerator,and a two-stage parallel thermoelectric generator(TPTEG)was established to harvest the waste heat during the operation of PAFC for performance enhancement.Taking account of the over-potential loss,heat recovery loss,heat leakage of PAFC and the main irreversible loss of the semiconductor,the relationship between the operating current density of PAFC and TPTEG was obtained through numerical analysis,the operating current density interval of TPTEG in the hybrid system was determined,the power and efficiency expressions of the hybrid system were derived,and the impact of TPTEG in parallel on the waste heat recovery of PAFC was analyzed.The results show that the performance of the PAFC-TPTEG hybrid system is better than that of a single PAFC system.The effects of operating temperature and pressure of the fuel cell,number of thermoelectric elements,thermal conductivity coefficient,and figure of meriton on the hybrid system were studied.The results can provide some theoretical basis for further research on the performance of hybrid systems of PAFC and semiconductor thermoelectric generators.

关 键 词：磷酸燃料电池 两级并联热电发电器 数值分析 混合系统 余热回收 

分 类 号：TM911.4[电气工程—电力电子与电力传动]