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) 

To calculate the heat pump efficiency, divide the total heat removed by the pump by the total work needed to remove the heat, then multiply by 100.

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 (%)


FAQ

What factors can affect the efficiency of a heat pump?

The efficiency of a heat pump can be influenced by several factors, including the temperature difference between the source and destination, the quality of the heat pump’s components, and the condition of the system (e.g., cleanliness and maintenance level). External environmental conditions, such as extreme cold or heat, can also impact efficiency.

How does the efficiency of a heat pump compare to traditional heating systems?

Heat pumps are generally more energy-efficient than traditional heating systems, such as furnaces and boilers, especially in mild climates. This is because they move heat rather than generate it by burning fuel. However, their efficiency can decrease in extremely cold climates, making them less efficient than traditional systems in those conditions.

Can the efficiency of a heat pump improve over time with technological advancements?

Yes, the efficiency of heat pumps has improved over time due to technological advancements in materials, design, and control systems. Manufacturers continue to innovate, leading to heat pumps that operate more efficiently, even in colder climates. Future advancements are expected to further improve efficiency, reduce environmental impact, and expand the usability of heat pumps in a wider range of climates.