热电制冷模组热端散热器性能优化研究

Study on performance optimization of hot-end radiator of thermoelectric cooling module

针对实际项目热电制冷模组进行了三维数值模拟,对比分析断槽数不同的四种典型散热器在不同电流、翅片厚度、断槽宽度下的散热能力,得到了性能较佳的工况与散热器模型。结果表明,随着电流增加,热电制冷模组冷面温度不断降低,当电流超过一定数值时,冷面温度趋于平衡,热面温度急剧上升。四类散热器中,断槽数为一的散热器散热能力较佳,并对此类散热器的翅片厚度进行优化,在研究范围内,翅片厚度2.5 mm散热效果较佳。断槽宽度有临界值,断槽宽度值小于9 mm时散热器面积减小不会使散热能力减弱,反之大于9 mm时散热能力急剧衰弱,为实际工程的分析提供了借鉴和参考。

Three-dimensional numerical simulation was carried out for the thermoelectric refrigeration module of the actual project,and the heat dissipation capacities of four typical radiators with different numbers of broken slots under different currents,fin thickness and width of the broken slots were compared and analyzed,and the working conditions with better performance and radiator models were obtained.The results show that as the current increases,the temperature of the cold surface of the thermoelectric cooling module continues to decrease.When the current exceeds a certain value,the temperature of the cold surface tends to balance and the temperature of the hot surface rises sharply.Among the four types of radiators,the radiator with one slot number has the better heat dissipation capacity,and the fin thickness of this type of radiator is optimized.In the research range,the fin thickness of 2.5 mm has the better heat dissipation effect.The width of the broken groove has a critical value.When the slot width value is less than 9 mm,the reduction of the heat sink area will not weaken the heat dissipation capacity.On the contrary,when the width of the broken groove is greater than 9 mm,the heat dissipation capacity will decline sharply,which provides a reference for the analysis of actual projects.