摘要
热电制冷器(TEC)可以强化散热器冷却性能,但受热端散热强度、工作电流、工作热负荷等参数影响较大。本文建立了TEC强化风冷散热模块的有限元分析模型,对其温度分布、工作特性进行了系统的理论和实验研究,并提出了确定TEC强化风冷散热模块有效工作电流、有效热负荷和有效制冷系数范围的方法。仿真和实验结果表明:特定的TEC强化风冷散热模块存在一个极限热负荷Qc,max,仅在工作热负荷Qc<Qc,max,且TEC工作电流处在有效范围内时,才可获得比无TEC的风冷散热模块更低的芯片结温,即TEC表现出强化散热器冷却性能的特点;有效工作电流范围会随Qc的增大而减小;增大热端散热强度可以降低芯片结温,但对于提升Qc,max效果较小;制冷系数(COP)在有效范围内存在一个极值点,小于此值时芯片结温会随COP的减小而迅速增大。
Thermoelectric coolers(TEC)can enhance the cooling performance of the radiator but are greatly affected by parameters such as heat dissipation intensity,working current,and working heat-load.In this study,the finite element analysis model of TEC enhanced air-cooling module is established,and the system theory and experimental research on the temperature distribution and operating characteristics of the module are carried out.The study proposes a method to determine the effective operating current,heat load,and cooling coefficient range of TEC enhanced air-cooling module.Simulation and experimental results indicate that there is a limit heat-load Qc,max for a specific TEC enhanced air-cooling module,only when the working heat load Qc<Qc,max,and the operating current of TEC is in the effective range,a lower chip junction temperature than the air-cooling module without TEC can be obtained.TEC can enhance the cooling performance of the radiator.The effective operating current range will decrease with an increase in Qc,while increasing the heat dissipation intensity of the hot side can reduce the junction temperature,but has little effect on improving Qc,max.The coefficient of performance(COP)has an extreme point in the effective range,smaller than which the temperature of chip junction will increase rapidly as the COP decreases.
作者
王子成
蔡兰兰
高鹏
付亚宇
李鹏
Wang Zicheng;Cai Lanlan;Gao Peng;Fu Yayu;Li Peng(School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan, 430070, China;No.18 Research Institute, China Electronics Technology Group Corporation, Tianjin, 300384, China)
出处
《制冷学报》
CAS
CSCD
北大核心
2020年第2期48-55,共8页
Journal of Refrigeration
基金
国家自然科学基金国际合作与交流项目(51620105014)
国家国际科技合作专项项目(2014DFA63070)资助。
关键词
热电制冷器
工作特性
风冷散热
有限元分析
thermoelectric cooler
operating characteristics
air cooling
finite element analysis
