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根据麦克亚当斯(Mcadams)公式绘制的计算图表,常用来计算各种大小水管内侧的水膜系数。麦克亚当斯公式如下: h_i=(150(1+0.011t)V~(0.8))/((d_i)~0.2) 但是,这个公式在水温高于250°F时就不准确了。当水温增高时,用这个公式算出的水膜系数都比对任何液体用普兰特
Calculated graphs based on the McAdams formula are commonly used to calculate the water film coefficients on the inside of various sizes of pipes. The McAdams equation is as follows: h_i = (150 (1 + 0.011t) V ~ (0.8)) / ((d_i) ~ 0.2) However, this formula is inaccurate at water temperatures above 250 ° F. When the water temperature increases, using this formula to calculate the water film coefficient than any liquid Plant