二级半导体温差发电器性能优化分析

由于受温差和发电效率等因素的制约,单级半导体温差发电器已经不可能满足各种不同的需要,故提出一种二级半导体温差发电器。基于温差电技术的基本原理,采用有限时间热力学理论,建立了内外均不可逆情况下二级半导体温差发电器的理论模型和性能分析的数学模型。并以工作效率、输出功率和火用效率为目标函数,通过仿真计算分析其性能特性,计算出不同情况下半导体温差发电器的最大效率、输出功率和火用效率,进而优化了温差发电器的内部结构,确定了工作电流的最佳范围。所得结果可为二级半导体温差发电器的优化设计和最佳运行提供有价值的理论指导。

Performance Optimization Analysis of Two-stage Semiconductor Thermoelectric-generator

The single stage semiconductor thermoelectric-generator can't meet various requirements for the restriction of temperature difference and work efficiency.So a type of two-stage semiconductor thermoelectric-generator is put forward.Based on the principles of thermoelectric-generation technology and the finite-time thermodynamics,a two-stage semiconductor thermoelectric-generator theoretical model and a performance analysis mathematical model in the case of the internal and external irreversibility are establ...