磷酸燃料电池-两级热电系统性能分析及负载匹配  

PERFORMANCE ANALYSIS AND LOAD MATCHING OF PHOSPHORIC ACID FUEL CELL-TWO STAGE THERMOELECTRIC GENERATOR SYSTEM

作　　者：蒋树伟 黄跃武[1] Jiang Shuwei;Huang Yuewu(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：《太阳能学报》2021年第7期28-34,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51078068)。

摘　　要：建立一个利用磷酸燃料电池(PAFC)余热驱动两级半导体温差热电发电器(TTEG)的复合发电系统模型,考虑了PAFC电化学反应中的过电势损失、回热损失、热漏以及TTEG中的主要不可逆损失,导出PAFC,TTEG和复合系统的输出功率和效率的一般表达式,得到PAFC和TTEG电流密度之间的关系。确定系统的优化工作区间,分析主要参数对复合系统性能的影响,给出负载电阻的最佳匹配条件,所得结果可为实际的PAFC-TTEG复合发电系统的设计和优化运行提供理论依据。The model of a hybrid power generation system that utilizes the waste heat of phosphoric acid fuel cell(PAFC)to drive a twostage semiconductor thermoelectric generator(TTEG)is established,where the overpotential losses in electrochemical reaction of PAFC,the regenerative losses,the heat leak and the main irreversibilitiy losses in TTEG are taken into account.General expressions of power output density and efficiency of the PAFC,TTEG and hybrid system are derived.The fundamental relationship between the operating current density of PAFC and TTEG is obtained.The optimal regions of the hybrid system are determined.The optimum match condition for the load resistances is given.The effects of some parameters on the performance of the hybrid system are analyzed.The results obtained here may offer some theoretical guidance for the design and operation of a practical PAFC/TTEG hybrid system.

关 键 词：磷酸燃料电池 热电发电器 余热回收 负载匹配 

分 类 号：TM911.4[电气工程—电力电子与电力传动]