非常规条件下热电制冷器的性能分析  

Performance Analysis of Thermoelectric Refrigerators under Unconventional Conditions

作　　者：陆青青 申利梅[2] 唐佳新 刘泽宇 陈焕新[2] 刘煜 LU Qingqing;SHEN Limei;TANG Jiaxin;LIU Zeyu;CHEN Huanxin;LIU Yu(Dongfang Electric(Chengdu)Hydrogen Fuel Cell Technology Co.Ltd.,Chengdu 611731,Sichuan,China;School of Energy and Power Engineering,HuaZhong University of Science and Technology,Wuhan 430074,Hubei,China;Sichuan Key Laboratory of Long-life Fuel Cell,Chengdu 611731,Sichuan,China)

机构地区：[1]东方电气(成都)氢燃料电池科技有限公司,四川成都611731 [2]华中科技大学能源与动力工程学院,湖北武汉430074 [3]长寿命燃料电池四川省重点实验室,四川成都611731

出　　处：《制冷技术》2023年第6期1-7,19,共8页Chinese Journal of Refrigeration Technology

基　　金：四川省重大科技专项(No.2019ZDZX0002)。

摘　　要：本文建立了热电制冷器的仿真模型,研究了其在非常规条件下的性能变化规律及原因,分析了随温度变化的物性参数的影响。结果表明:随着热端温度(t_(h))的升高,热电制冷器的最大制冷温差(Δt_(max))和最大制冷量(Q_(c,max))先增大后减小。与t_(h)=27℃对比,t_(h)=-60℃时,Δt_(max)和Q_(c,max)分别衰减51.7%和40%;t_(h)=150℃时,Δt_(max)和Q_(c,max)分别增长48.6%和31.52%。在低温范围,物性参数的变化对Δt_(max)和Q_(c,max)影响较小;在高温范围,功率因子(PF)的衰减对Q_(c,max)影响较大,th>70℃优化PF可以有效提高Q_(c,max),而th>150℃时优化优值系数Z才可以显著提高Δt_(max)。在大热负荷条件下,随着热负荷的增加,最大有效性能系数逐渐降低。A simulation model of thermoelectric coolers is established,and its performance changes and reasons under unconventional conditions are studied,and the influence of physical parameters is analyzed.The results show that with the increase of the hot end temperature(t_(h)),The maximum cooling temperature difference(Δt_(max))and the maximum cooling capacity(Q_(c,max))of the thermoelectric cooler first increase and then decrease.Compared with th=27℃,when th=-60℃,Δt_(max) and Q_(c,max) attenuate by 51.7%and 40%,respectively;when th=150℃,Δt_(max) and Q_(c,max) increase by 48.6%and 31.52%,respectively.In the low temperature range,the change of physical property parameters has little effect onΔt_(max) and Q_(c,max);in the high temperature range,the attenuation of the power factor(PF)has a big influence on Q_(c,max).Optimiting PF at th>70°C can effectively increase Q_(c,max),and when th>150℃,optimizing the coefficient of merit Z can significantly increaseΔt_(max).Under high heat load conditions,as the heat load increases,the maximum effective coefficient of performance gradually decreases.

关 键 词：热电制冷器 非常规温度 大热负荷 制冷性能 

分 类 号：TB611[一般工业技术—制冷工程] TQ051.5[化学工程]