Since a cooling tower ton is based on 15,000 BTU/Hr, the formula is: The first step in selecting a cooling tower is to determine the Nominal cooling tower load. The fluid factor is obtained by using the weight of a gallon of water (8.33 lbs.) multiplied by the specific heat of the water (1.0) multiplied by 60 (minutes/hour). So, as you can see, the Design GPM and the ° Range of cooling, are directly proportional to the Heat Load.Īnd, 500 is the “fluid factor” which is based on water as the heat transfer fluid. More importantly, if the Heat Load and one of the other two factors are known, either the GPM or the ° Range of cooling, the other can be calculated using this formula.įor example: GPM = Heat Load (BTU/Hr), or 500 X ° Range of cooling ° Range of cooling = Heat Load (BTU/Hr) 500 X GPM ![]() The Design Heat Load is determined by the Flow Rate, and the Range of cooling, and is calculated using the following formula: Heat Load (BTU/Hr) = GPM X 500 X ° Range of cooling. The following design data is required to select cooling towers: The cooling tower selection table may look confusing, but after you have made a few selections, the process is straightforward. How comfortable are you working up a cooling tower selection? Let Us Help You With Cooling Tower Sizing & Selecting The range of cooling is directly proportional to the Heat Load. ° Range of cooling = Heat Load (BTU/Hr) / 500 X GPM The Design GPM and the °. ![]()
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