半导体温差发电器的热力学准则和性能参数

Thermodynamics Criteria and Performance parameter of a semiconductor Thermoelectric Generator

应用非平衡态热力学和有限时间热力学理论,导出了半导体温差发电器输出功率和效率的一般表达式;兼顾输出功率和效率,给出了半导体温差发电器优化性能的热力学准则;分析了效率随塞贝克系数与汤姆孙系数之比的变化,指出塞贝克系数与汤姆孙系数之比是半导体温差发电器的一个重要性能参数.

The general expressions of the power and the efficiency of a semiconductor thermoelectric generator are derived by using the theory of non-equilibrium thermodynamics and finite-time thermodynamics.The thermo-dynamics criteria on the optimal performance of a semiconductor thermoelectric generator is given while both the power and the efficiency are at a relatively high level.The efficiency varying with the ratio of Seebeck＇s coeffi-cient to Thomson＇s coefficient is analyzed,and it is pointed out that the ratio of Seebeck＇s coefficient to Thomson＇s coefficient is an important performance parameter of a semiconductor thermoelectric generator.