Enter the total heat removed by the heat pump (J) and the total work needed to remove the heat (J) into the calculator to determine the Heat Pump Efficiency. 

Heat Pump Efficiency Formula

The following formula is used to calculate the Heat Pump Efficiency. 

Ehp = HR / W *100

  • Where Ehp is the Heat Pump Efficiency (%)
  • HR is the total heat removed by the heat pump (J) 
  • W is the total work needed to remove the heat (J) 

How to Calculate Heat Pump Efficiency?

The following two example problems outline how to calculate the Heat Pump Efficiency.

Example Problem #1:

  1. First, determine the total heat removed by the heat pump (J). In this example, the total heat removed by the heat pump (J) is given as 594.
  2. Next, determine the total work needed to remove the heat (J). For this problem, the total work needed to remove the heat (J) is given as 1000.
  3. Finally, calculate the Heat Pump Efficiency using the equation above: 

Ehp = HR / W *100

Inserting the values from above and solving the equation: 

Ehp = 594 / 1000 *100 = 59.4 (%)


Example Problem #2: 

Using the same process as above, first define the variables required by the formula. In this case, these values are:

total heat removed by the heat pump (J) = 500

total work needed to remove the heat (J) = 600

Entering these values yields:

Ehp = 500 / 600 *100 = 83.33 (%)