论文部分内容阅读
获取精确的热电模块的热物性参数值是热电制冷系统性能分析的关键。制冷量是衡量热电制冷性能的参数,根据厂商数据单以及半导体材料与温度相关的热物性经验公式,绘制了采用常物性参数法、变物性参数法分析制冷量的性能曲线图,并提出通过热电臂内热平衡的微分表达式获得不同工况下制冷量的准确值及标准性能曲线图;通过数值对比分析发现,常物性参数法在计算热电制冷量时有最大约6 W的绝对误差,但可以通过改善常物性参数获取精度减小计算误差;而变物性参数法最大绝对误差仅为1.5 W,该热物性参数获取方法精度较高,适用于分析热电制冷性能。
Obtaining the thermophysical parameter values of the accurate thermoelectric module is the key to the performance analysis of the thermoelectric cooling system. Refrigeration capacity is a measure of the performance of the thermoelectric refrigeration parameters, according to the manufacturer data sheet and the thermal properties of semiconductor materials and temperature-related empirical formula, drawn the use of common property parameter method, variable parameter analysis of the cooling capacity performance curve, and proposed by thermoelectric The differential expression of the heat balance in the arm obtains the accurate value and the standard performance curve of the cooling capacity under different working conditions. By numerical comparison and analysis, it is found that the ordinary parameter method has a maximum absolute error of about 6 W when calculating the thermoelectric cooling capacity, By improving the accuracy of the ordinary physical parameters, the calculation accuracy is reduced, while the maximum absolute error of the variable parameter method is only 1.5 W. The accuracy of the method for obtaining the thermal physical parameters is high and it is suitable for analyzing the thermoelectric cooling performance.