固态温差发电机能拥有卡诺热机效率吗?  

Can Solid-State Thermoelectric Generators Acquire Efficiency of Carnot Engines?

作　　者：段懿玲 刘作霖 林尚超 DUAN Yiling;LIU Zuolin;LIN Shangchao(China-UK Low Carbon College,Shanghai Jiao Tong University,Shanghai 201306,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学中英国际低碳学院,上海201306 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《上海交通大学学报》2021年第S01期112-115,共4页Journal of Shanghai Jiaotong University

基　　金：上海航天先进技术联合基金(USCAST2020-13);上海交通大学“深蓝计划”基金(SL2020MS008)资助项目。

摘　　要：简述了固态温差发电机与经典卡诺热机在热力学层面的异同,归纳了热电转换不可逆性的来源,分析表明了只有在限定电导率范围内提升材料热电优值才能使热电转换效率逼近理想卡诺热机效率.通过与内可逆卡诺热机最大输出功率的对比,得出接触热阻、热交换速率等对温差发电性能的重要影响.This paper briefly describes the differences and similarities between solid-state thermoelectric generators and classical Carnot engines at the thermodynamic level.The reasons behind the irreversibility in solid-state thermoelectric conversion are summarized.Enhancing thermoelectric figure of merit can only push the energy conversion efficiency towards the ideal Carnot limit within a certain electric conductivity region.By comparing with the output power of endoreversible Carnot engines,this paper demonstrates the importance of contact thermal resistance and heat exchanging rate to the thermoelectric conversion performance.

关 键 词：固态温差发电机 热电转换效率 卡诺热机 热力学循环 

分 类 号：TK12[动力工程及工程热物理—工程热物理] O469[动力工程及工程热物理—热能工程]