设通风阁楼层冷库屋顶传热系数计算方法及其影响因素分析

论文介绍了基于稳态导热情况下的设通风阁楼屋顶传热系数三种计算方法，计算值分别为0．1214w／（m^2℃）、0．1210w／（m^2℃）、0．1298w／（m^2℃）。考虑两侧温差修正系数后，计算结果出现了变化，其值分别为0．1396w／（m^2℃）、0．1392w／（m^2℃）、0．1298w／（m^2℃）。计算结果表明：三种方法得出的屋顶传热系数相差不大，可用来工程上计算通过屋顶的传热量；用传热系数和温差修正系数的乘积大小来考察屋顶传热性能更有说服力。

The Analysis on Calculation Methods of Heat Transfer Coefficient and Its Influence Factors of the Cold Storage Roof with Ventilated Attic

Based on the steady-state heat conduction, this paper introduced three calculation methods of heat transfer coefficient with ventilated attic, the results were 0.1214 w/（m2℃）, 0.1210 w/（m2℃）, 0.1298w/（m2℃）. After considering the correction factor of temperature difference both sides of the roof, the results have changed, the values were 0.1396 w/（m2℃）, 0.1392 W/（m2 ℃）, 0.1298w/（m2℃）. The results show that heat transfer coefficient of the roof derived from three methods has small difference, and can be used to calculate the heat transfer through the roof; it is more convincing to investigate the heat transfer characteristics of the roof with the size of the product of heat transfer coefficient and the correction factor of temperature difference.