Regarding the calculation of the evaporation rate in cooling towers!
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Current situation: The circulation pump has a capacity of 700 M3/H; after accounting for losses in the pipelines and the flow rate through the shallow filters, the actual flow rate is around 600 M3/H. The temperature difference between the inlet and outlet water in the cooling tower is 7.3°C. Based on these figures, I calculated the flow rate as 600*7.3/550 = 7.96 M3/H. I would like to know if this calculation is correct. I found various calculation methods online. When I contacted the manufacturer, they said that the evaporation rate has nothing to do with the temperature difference, and that it’s sufficient to calculate it based on 0.5% of the total water volume. However, the values obtained from these different methods differ significantly. I seek your guidance!
Primary consideration should be given to air humidity, heat dissipation area, air flow rate, and inlet water temperature; manufacturers have experienced formulas for calculations. Thank you