多级温差发电器串并联分析模型

为了准确描述多级温差发电器的输出特性,本文提出了热电模块的三种连接方式。根据热力学理论、半导体热电理论和能量守恒定律,通过控制体积法建立了多级温差发电器串并联连接的分析模型。由Newton-Raphson数值算法仿真后得到了三种连接方式的输出特性,并分析了系统负载、热电模块的接触效应以及冷热端热阻对温差发电器输出性能的影响。结果表明,该模型具有参数求解简单、计算量小、适应性强等优点,能够描述多级温差发电器内部温度场、输出特性以及系统匹配负载等关键参数,为温差发电器的设计和优化提供了理论参考。

Analytical Model for Multi-stage Thermoelectric Generator with Series and Parallel Connection

In order to precisely represent the output performance of multi-stage thermoelectric generators, three kinds of connection modes for thermoelectric modules were proposed. Based on thermodynamics theory, semiconductor thermoelectric theory and law of energy conservation, the model was built with an elemental approach. Newton-Raphson method was introduced to simulate the model and return the results of the output performance. In addition, the load resistance, the contact effect of thermoelectric module and thermal resistance on both hot and cold ends of the module were discussed. The results showed that the proposed model is easy and robust to be solved with less computing time. And the model can be used to predict the important parameters such as the inner temperature, the output performance and the load resistance of multi-stage thermoelectric generator, which are of great significance to the design and optimization of thermoelectric generator.