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本文从表明热湿交换相似关系的Lewis比例出发,经过较严格的数学推导,得出了利用干工况传热效率计算表面式空气冷却器(简称表冷器)湿工况传热的简便方法——焓值效率法和湿球温度效率法。用这个方法,函数关系清晰明了,可不用试算而简便地直接算出结果,而且便于制成计算图表,使各类计算更加方便直观;同时,经过与实测结果的比较表明,计算精度也令人满意。
Based on the Lewis ratio, which shows the similarities and differences between heat and moisture exchange, the mathematical derivation of the heat transfer efficiency shows that the heat transfer efficiency of the surface air cooler (referred to as surface cooler) The enthalpy efficiency method and wet bulb temperature efficiency method. With this method, the function relationship is clear and straightforward, and the result can be calculated directly and conveniently without trial calculation. Moreover, it is convenient to make the calculation chart and make all kinds of calculation more convenient and intuitive. Meanwhile, the comparison with the measured results shows that the calculation accuracy is also impressive satisfaction.