基于热管散热的热电制冷器性能综合分析  

Comprehensive Performance Analysis of Thermoelectric Coolers Based on Heat Pipe Heat Dissipation

作　　者：孟凡凯[1] 陈赵军 徐辰欣 江帆 谢志辉[1] MENG Fankai;CHEN Zhaojun;XU Chenxin;JIANG Fan;XIE Zhihui(College of Power Engineering,Naval University of Engineering,Wuhan 430033,Hubei,China)

机构地区：[1]海军工程大学动力工程学院,湖北武汉430033

出　　处：《华南理工大学学报（自然科学版）》2021年第10期104-113,共10页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11974429,51979278);基础加强计划领域基金项目(2101070)。

摘　　要：热管具有导热性能高、轻便化、小型化的优点。建立了基于热管散热的热电制冷器有限时间热力学模型,给出了冷、热端热阻的具体计算方法。为了反映热电模块单位面积下的制冷能力,采用制冷率密度分析方法和折算面积热阻法,用数值算例分析了关键运行参数和设计参数的影响。为了比较不同工况下的制冷性能,首次引入热力学完善度性能指标,对热电制冷器的制冷性能进行了综合分析。给出了制冷器运行的最佳电流工作区间以及制冷温差范围,分析了制冷模块填充系数、制冷温差、热管参数(蒸发段长度和管壁厚度)对制冷器制冷率密度、制冷系数和热力学完善度的影响,并与风冷散热方式进行了比较,所得结果可为基于热管散热的制冷器设计和运行提供理论指导。The heat pipe has the advantages of high thermal conductivity,lightness and miniaturization.This study proposed a finite-time thermodynamic model of thermoelectric coolers based on heat pipe heat dissipation and the specific calculation methods for the thermal resistance of the cold and hot junctions.In order to reflect the cooling capacity per unit area of the thermoelectric module,the refrigeration rate density analysis method and the converted area thermal resistance method were used to analyze the influence of key operating parameters and design parameters with numerical examples.In order to compare the refrigeration performance under different working conditions,the thermodynamic perfectibility was introduced and the refrigeration performance of the thermoelectric refrigerator was comprehensively analyzed.The paper also revealed the optimum current working range and temperature diffe-rence range of thermoelectric coolers and analyzed the influence of the refrigeration module filling factor,cooling temperature difference,heat pipe parameters(evaporation section length and tube wall thickness)on the refrigeration density,coefficient of performance(COP)and thermodynamic perfectibility of the refrigerator.Its performance was compared with that of air cooling and the results can provide theoretical guidance for the design and operation of refrigerators based on heat pipe heat dissipation.

关 键 词：热电制冷器 热管 有限时间热力学 热力学完善度 制冷率密度 制冷系数 

分 类 号：TB66[一般工业技术—制冷工程]