How does air source heat pump work?

How does air source heat pump work?

Air source heat pumps are able to produce more energy than they consume.Although it needs electricity,in order to drive the device to transfer heat. So it can save much energy consumption than gas heater, electric heater and fuel boiler, heat pump water heater can produce up to four times more energy than they use during operation.The heat pump is made up of 4 main components that carry out this refrigeration cycle to produce the energy to heat your home and hot water.

(1) Energy from the outside air is transferred to the liquid refrigerant that is circulated through the evaporator. As the refrigerant is much cooler than the air, heat is transferred from the air to the refrigerant causing the refrigerant to change state from liquid to gas.

(2) The heated refrigerant gas is then compressed by the electrically driven compressor, which reduces its volume but increases its temperature significantly.

(3) The compressed hot gas is now drawn into the heat exchanger (condenser) where it is surrounded by the water from the property’s heating system. As the gas is much hotter than the water, the gas gives up its heat to the water and condenses back into liquid form, but still at a high pressure.

(4) The cooler liquid refrigerant then passes through an expansion valve which reduces the pressure. The liquid refrigerant is now able to absorb heat from the external air, allowing the cycle to begin again.