How to Size Water Cold Pack or Chilled Water System Air Conditioning Flow Rate (Imperial Gallon Per Minute, Igpm)
Once you know how much is your building cooling load (Refrigerant Ton, Rton), the next step is to size your water cold pack or chilled water system pump, how much is the flow rate of the designed pump required?
Here are simple and typical consultancy ways of calculation.
Example: The building cooling load is 500 Rton
For Condensed Water System, the pump flow rate required is= 500 Rton x 3 Igpm/Rton = 1500 Igpm
For Chilled Water System, the pump flow rate required is = 500 Rton x 2.5 Igpm/Rton= 1250 Igpm
Hope that the above can help in your air conditioning system pump design sizing.
