平板磁制冷和热电磁复合制冷微元循环数值研究  

Numerical Study on the Micro-element Cycle of Flat-plate Magnetic Refrigeration and Hybrid Refrigeration Combining Thermoelectric Refrigeration With Magnetic Refrigeration

作　　者：黄红梅 李振兴[1,2,3] 李珂 海鹏[1,3] 郑文帅 戴巍[1,2] 沈俊 HUANG Hongmei;LI Zhenxing;LI Ke;HAI Peng;ZHENG Wenshuai;DAI Wei;SHEN Jun(Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Ganjiang Innovation Academy,Chinese Academy of Sciences,CGanzhou 341000,China)

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院赣江创新研究院,赣州341000

出　　处：《工程热物理学报》2023年第7期1774-1782,共9页Journal of Engineering Thermophysics

基　　金：国家重点研发计划(No.2019YFA0704900);国家自然科学基金资助项目(No.51925605);中科院基础前沿科学研究计划(No.ZDBS-LY-JSC017);中国科学院科研仪器设备研制项目(No.YJKYYQ20200076);中国博士后科学基金资助项目(No.2021T140681)。

摘　　要：本文借助COMSOL多物理场耦合软件,构建了二维瞬态平板磁制冷微元模型和热电磁复合制冷微元模型,考察了热电臂厚度、电流、运行频率、外界对流换热系数对复合制冷性能的影响。模拟结果显示,在大多数工况下热电磁复合模型的比制冷功均大于磁制冷模型的比制冷功率;改变不同几何和运行参数对复合制冷性能有不同的影响。在研究工况范围内,改变热电臂厚度(0.05~0.5mm)、电流(0.4~0.8A)、运行频率(0.5~4Hz)和对流换热系数(500~2000W·m^(-2)·K^(-1)),热电磁复合制冷微元模型相比于平板磁制冷微元模型,制冷功率密度最大提高分别为2.05倍、2.12倍、2.68倍、1.87倍。本研究对后续开展热电磁复合制冷系统机理研究提供重要指导。In this paper,a two-dimensional transient fat-plate magnetic refrigeration micro-element model and a hybrid refrigeration micro-element model combining thermoelectric refrigeration with magnetic refrigeration are constructed by means of COMSOL Multiphysics 5.5.The effects of thermocouple thickness,input current,operating frequency,and external convection heat transfer coefficient on the performance of the hybrid refrigeration were investigated.The simulation results show that,under most operating conditions,the specific cooling power of the hybrid refrigeration model is greater than that of the magnetic refrigeration model.Changing different geometric and operating parameters has diferent effects on the performance of hybrid refrigeration.Within the research conditions,by changing the thickness of the thermocouple(0.05~0.5 mm),input current(0.4~0.8 A),operating frequency(0.5~4 Hz),and convective heat transfer coefficient(500~2000 W·m^(-2)·K^(-1)),compared with the fat-plate magnetic refrigeration,the hybrid refrigeration has the maximum increase in cooling power density is 2.05 times,2.12 times,2.68 times,and 1.87 times,respectively.This study has an important reference value for the follow-up research on the mechanism of the hybrid refrigeration system combining thermoelectric refrigeration with magnetic refrigeration.

关 键 词：磁制冷 热电制冷 微元循环 数值模拟 性能优化 

分 类 号：TB651[一般工业技术—制冷工程]