How many Kilowatt-hours does an Air Source Heat Pump need to Generate one Gigajoules of Heat

The energy efficiency ratio (COP) of an air source heat pump is usually between 3 and 4, which means that 3 to 4 kilowatt-hours of heat can be generated for every kilowatt-hour of electricity consumed.

To calculate the amount of electricity required to generate one gigajoules (GJ) of heat, we can use the following steps:

1. First determine the energy efficiency ratio (COP) of the heat pump:

The COP of a general air source heat pump is usually between 3 and 4.

2. Calculate the amount of electricity required for each gigajoules of heat:

1 gigajoules (GJ) is equal to 1,000,000 kilojoules (kJ).

If the COP is 3, 3 kilowatt-hours of heat can be generated for every kilowatt-hour of electricity consumed.

Therefore, the amount of electricity required to generate 1 gigajoules of heat is:

Electricity = Heat/COP = 1,000,000 kJ / 3 kJ(kilowatt-hours) = 333333 kilowatt-hours

If the COP is 4, 4 kilowatt-hours of heat can be generated for every kilowatt-hour of electricity consumed.

Therefore, the amount of electricity required to generate 1 GJ of heat is:

Electricity = Heat/COP = 1,000,000 kJ / 4 kJ (kWh) = 250,000 kWh

The amount of electricity required to generate 1 GJ of heat by an air source heat pump is approximately between 250,000 and 333,333 kWh, depending on the energy efficiency ratio (COP) of the heat pump.