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How to Calculate the chilled water flow rate demand for 1 Ton of Refrigeration or Airconditioning

How to Calculate the chilled water flow rate demand for 1 Ton of Refrigeration or Airconditioning

How to Calculate the chilled water flow rate demand for 1 Ton of Refrigeration or Airconditioning

How to Calculate the chilled water flow rate demand for 1 Ton of Refrigeration or Airconditioning

The chilled water flow rate demand for 1 ton of air conditioning refers to the amount of water required to cool the refrigerant in the air conditioning system, measured in gallons per minute (gpm) or liters per minute (lpm).


To calculate the chilled water flow rate demand for 1 ton of air conditioning, the following factors should be taken into consideration:

  1. Refrigerant type: The type of refrigerant used in the air conditioning system affects the amount of water required to cool it.
  2. Evaporator temperature: The temperature of the refrigerant in the evaporator coil affects the amount of water required to cool it.
  3. Condenser temperature: The temperature of the refrigerant in the condenser coil affects the amount of water required to cool it.
  4. Refrigerant flow rate: The amount of refrigerant flowing through the system affects the amount of water required to cool it.

To estimate the chilled water flow rate demand, you can use the following formula:

Chilled water flow rate (gpm) = 1 ton * 12,000 BTUs / (ΔT * 500)

Where ΔT is the difference between the evaporator temperature and the condenser temperature.

It’s important to note that these calculations are just an estimate and may not take into account all of the specific factors that affect the chilled water flow rate demand in a particular air conditioning system. It is always recommended to consult with a professional HVAC contractor or engineer to accurately determine the chilled water flow rate demand for a specific system.

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