管翅式相变蓄热装置的三因素优化

Three Factors Optimization of Tube-fin Phase Change Heat Storage Device

本文为了研究不同内管半径、翅片长度、翅片厚度对管翅式相变蓄热装置蓄热量的影响,采用三元二次回归正交试验结合数值模拟的方法,建立了可靠且不失拟的回归方程并对三个因素进行了优化。试验结果表明:对蓄热量的影响程度从大到小依次为翅片长度、内管半径、翅片厚度,三个因素的交互作用也会对蓄热量产生一定的影响。回归方程满足回归试验的显著性检验以及失拟性检验。为了检验方程的准确性,任意给出了一组数据,结果显示回归方程的相对误差为0.2%。通过回归方程得出,在5000 s时间段内蓄热量最大时对应的内管半径、翅片长度、翅片厚度分别为30 mm、20 mm、20 mm。本文的研究为管翅式相变蓄热装置的优化和应用奠定了基础。

In order to study the effect of different inner tube radius,fin length and fin thickness on heat storage of tube-fin phase change heat storage device,a reliable and fitting regression equation was established by using the method of orthogonal test combined with numerical simulation,and the three factors were optimized.The test results show that the three factors all have obvious influence on the heat storage device.The influence degree on the heat storage,from large to small,is the fin length,the inner tube radius and the fin thickness,and the interaction of the three factors will also have a certain influence.The regression equation satisfies the significance test and the misfitting test.To test the accuracy of the equation,an arbitrary set of data is given,and then the error of the equation is only 0.2%.The regression equation shows that the inner tube radius,fin length and fin thickness is 30 mm,20 mm and 20 mm respectively when the heat storage reaches its maximum in the period of 5000 s.The research in this paper lays a foundation for the optimization and application of the tube-fin phase change heat storage device.