Air source heat pumps explained
The environment is full of energy, even at sub-zero temperatures there is plenty of energy available from outside.
Air source heat pumps use conventional refrigeration technology to extract the sun’s energy stored in the environment and raise it to a temperature suitable for heating purposes. This principle works even in the middle of winter at temperatures as low as -25°C.
An air source heat pump heating system consists of 3 components: the heat source, the heat pump itself and a heat distribution and storage system.
Air source heat pumps are able to produce more energy than they consume by using the conventional refrigeration cycle to absorb heat from the environment and raise it to a suitable level for heating.
75% of the energy is taken from the environment i.e the air and transferred to the air source heat pump.
25% of the energy is sourced from the national grid in the normal way of supplying your electricity. This is used to operate the heat pump but with very low consumption
The energy from the air is transferred to the refrigerant inside the heat pumps evaporator. This causes the temperature of the refrigerant to rise and change state from liquid to gas.
A heat exchanger (condenser) then extracts the heat energy from the hot refrigerant to heat water for central heating, underfloor heating or domestic hot water.
Using nature’s energy efficiently
Heat pumps are among the most efficient heating and hot water systems available today. Approximately 75% of the energy needed for heating comes from the environment. This means that for every 1kWh of electricity used to power the heat pump compressor, between 3 and 4 kWh of heating energy are produced, giving the heat pump an efficiency of 300-400% or higher.
The heat pump’s “efficiency” is known as it’s “Coefficient of Performance” (CoP). This is simply a ratio between the proportion of the total energy supplied that can be extracted from the environment and the amount supplied by electricity to run the heat pump compressor. The higher the CoP, the more “free” environmental energy the heat pump is using!
With Government incentives at an all time high there really hasn’t been a better time to switch over to a renewable technology – contact us today to arrange a survey