Calculation of cooling capacity for cooling towers

Ah, no need to bother everyone; I found the answer myself! Let me share this: The cooling number N represents the number of characteristic values required for the water temperature to drop from t1 to t2; it indicates the magnitude of the cooling task. In the cooling number, (i” - i) represents the difference between the enthalpy of the saturated air layer above the water surface and the enthalpy of the outside air. The smaller this value is, the more difficult it is for water to dissipate heat. It is related to external air parameters, and has nothing to do with the structure and type of the cooling tower. When the ratio of air volume to water volume remains the same, a larger N value indicates that more heat needs to be dissipated, and thus a larger volume of water spraying equipment is required. In the characteristic number N”, βx reflects the heat dissipation capability of the water spray device; therefore, this characteristic number indicates the cooling capacity of the cooling tower. It is related to the structural dimensions of the water spray device, its heat dissipation performance, as well as the flow rates of water and air.