牛顿冷却定律是由英国物理学家艾萨克·牛顿爵士(1642-1727)所提出的一个经验性的关系。其论述一个物体所损失的热的速率与物体和其周围环境间的温度差是成比例的。
通常，对流换热系数是在实验中以电加热试验管壁面后根据牛顿冷却定律计算得来的。
Normally, coefficient of convective heat transfer is gotten through experiments which is heating testing tube by electricity and computed through Newton cooling law.
指出集中空调冷却水系统为开式系统，一般不适用功率三次方定律，静压头应为冷却塔塔体扬程，并提出了冷却水泵变速时轴功率的计算公式；
Points out that the cubic law of pump power is not valid for the cooling water system of central air conditioning for it is an open system. The static head should be the lift in a cooling tower.
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