Abstract: The thermal connection and electrical connection of two thermoelectric modules are analyzed when Thomson effect is taken into consideration.The discussion is focused on the refrigerating capacity and coefficient of performance of the four connection patterns，to analyze the contribution of following factors to the performance of thermoelectric refrigeration system，i.e.，the number of thermocouples ratio，operating current，and the ratio of the cross-sectional area to the length of thermoelectric element.It was found that the thermal parallel and electrical series mode could be chosen at the high cooling load or low temperature difference requirement.At the high temperature difference requirement,the thermal series mode could be chosen，and the cooling capacity of thermal series and electrical series mode is always larger than thermal series and electrical parallel mode.However，at the middle temperature difference requirement,the thermal parallel and electrical series mode could be chosen at the large cooling load requirement，and the thermal series and electrical series mode could be chosen at the high coefficient of performance (COP)requirement.The optimum working conditions and range of application obtained for the four connection patterns will be a theoretical support for selection and optimization of the connection strategy for thermoelectric refrigeration modules in practical applications.

Key words: thermal connection, electrical connection, thermoelectric modules

摘要： 在考虑汤姆逊效应情形下，分析两块热电制冷模块的热连接与电连接方式的制冷性能，讨论热电偶对数比、工作电流和面长比对4种连接方式的制冷量和制冷系数的影响，探讨4种连接方式的最佳工况和适用范围。发现在大制冷量或较小温差需求下可选择热并联电串联模式；在较大温差需求下可选择热串联模式，且热串联电串联的制冷量始终大于热串联电并联的；然而对于中等温差需求，当需要大的制冷量时，可选用热并联电串联，当需要较高的制冷系数时，可选用热串联电串联。为实际应用中多个制冷模块的连接方式的选取提供了理论指导。

关键词: 热连接, 电连接, 热电制冷模块