碱性燃料电池-温差热电制冷混合系统的性能分析  

Performance Analysis of Integrated Alkaline Fuel Cell-Thermoelectric Cooling Hybrid System

作　　者：焦恺彬 黄跃武[1] JIAO Kaibin;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：《东华大学学报（自然科学版）》2020年第4期628-635,共8页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金资助项目(51078068)。

摘　　要：建立了由碱性燃料电池(alkaline fuel cell,AFC)、热电发电器、热电制冷器和一组板翅式热交换器组成的混合系统模型。考虑系统的电化学和热力学不可逆性损失,导出了混合系统的等效输出功率和效率的表达式,确定了燃料电池电流密度的优化区间,讨论了工作压力、工作温度、热电元件数量、热电元件传热系数、板翅式热交换器传热系数对混合系统的等效输出功率和效率的影响。结果表明,混合系统的最大输出功率密度及对应的效率,相比单独的碱性燃料电池分别提高了7.56%和6.40%,相比无板翅式热交换器时分别提高了7.55%和8.04%。所得结果可为碱性燃料电池温差热电制冷混合系统的优化设计提供理论依据。This paper established a hybrid system including alkaline fuel cell(AFC),thermoelectric generator,thermoelectric cooler and a group of plate-fin heat exchanger.The thermodynamic and electrochemical irreversible losses in each component were fully considered.Numerical expressions for the equivalent output power and efficiency of the hybrid system were obtained respectively,and the optimal range of AFC current density was determined.Then we discussed the influences of working pressure and temperature,the number of thermoelectric elements,heat transfer coefficients of thermoelectric elements and plate-fin heat exchanger on the equivalent output power and efficiency of hybrid system.The results show that the maximum output power density and efficiency of the hybrid system increase by 7.56%and 6.40%respectively compared with the stand-alone AFC,and increase by 7.55%and 8.04%respectively compared with the non-plate-fin heat exchanger.The results can provide theoretical basis for the optimal design of AFC thermoelectric cooling hybrid system.

关 键 词：热电制冷器 碱性燃料电池 热电发电器 板翅式热交换器 等效输出功率 

分 类 号：TM911.4[电气工程—电力电子与电力传动]