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To calculate the IKW/TR (Kilowatts per Ton of Refrigeration) using an ultrasonic flow meter for chiller performance, you will need to gather a few pieces of information and follow these steps:

Gather the necessary data:

  • Chilled water flow rate (in gallons per minute or liters per second)
  • Chilled water supply and return temperature differentials (ΔT) (in Fahrenheit or Celsius)
  • Cooling capacity of the chiller (in tons of refrigeration)

Measure the chilled water flow rate:

  • Install the ultrasonic flow meter in the chilled water supply line according to the manufacturer’s instructions.
  • Ensure that the flow meter is properly calibrated and functioning correctly.
  • Record the chilled water flow rate reading from the flow meter.

Calculate the chilled water flow rate in gallons per minute (GPM) or liters per second (L/s) based on the flow meter reading.

Calculate the total heat transfer rate (KW) using the formula:
KW = Flow rate (GPM or L/s) * ΔT * 500 (for GPM) or KW = Flow rate (L/s) * ΔT * 4.1868 (for L/s)

Convert the total heat transfer rate (KW) to tons of refrigeration (TR):
1 ton of refrigeration = 12,000 BTU/h = 3.516 KW
TR = KW / 3.516

Calculate the IKW/TR (Kilowatts per Ton of Refrigeration) using the formula:

By following these steps and using the ultrasonic flow meter readings, you can calculate the chiller performance in terms of IKW/TR. Remember to ensure accurate measurements and proper calibration of the ultrasonic flow meter for accurate results.

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