应用热电制冷元件的新型磁制冷系统数值模拟研究

Numerical Simulation of a New Magnetic Refrigeration System Using Thermoelectric Refrigeration Elements

借助COMSOL多物理场耦合软件,构建了使用热电制冷元件的新型磁制冷二维瞬态模型,研究了输入电流、利用系数及制冷单元数等参数对新型磁制冷系统制冷性能的影响。结果表明:制冷功率和温跨均随输入电流增大呈比例增大,对于不同的输入电流,最佳COP对应不同的利用系数;制冷功率和COP均存在最佳的利用系数,且制冷功率的最佳利用系数随输入电流的增大而增大;制冷功率和COP均随制冷单元数的增加而增大。研究结果为新型磁制冷系统的机理和实验研究提供有价值的参考。

A two-dimensional transient model of a new magnetic refrigeration system using thermoelectric refrigeration elements was established using COMSOL Multiphysics.The effects of input current,utilization factor,and number of refrigeration units on the performance of the new system were studied.The results showed that:both the cooling power and the temperature span increase proportionally with the increase of the input current.For different input currents,the optimum COP corresponds to different utilization factor.The optimal utilization factor of refrigeration power and COP is found,and the optimal utilization factor of refrigeration power increases with the increase of input current.The cooling power and COP increases as the number of refrigeration units increases.The simulation results provide valuable reference for the mechanism and experimental study of the new magnetic refrigeration system.