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【单选题】
空气通过换热面进行传热、管壁热阻和污后热阻可以忽略。若将水的对流传热系数提高至原来的2倍、则总传热系数( )A.
几乎不变
B.
变为接近原来的1、5倍
C.
变为接近原来的2倍
D.
为变接近原来的1、74倍 [参考答案]根据题意以及总传热系数的计算公式可知，本题目中水的对流传热系数对总传热系数基本没有影响，所以答案选A。
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