How does heat pump work

Working of heat pump

A heat pump is a refrigerator operating in reverse order
A heat pump is a thermodynamic system operating in a cycle that removes heat from a low-temperature body and delivers it to a high-temperature body.
It does work to pump, heat from a cold reservoir such as a river or the surrounding land into a hot sink such as the inside of a house.
Heat pumps are used to heat houses and commercial buildings during the winter and cool them during the summer.

During winter, the liquid refrigerant is allowed to evaporate in coils kept in the outside air.
Heat is absorbed from the low-temperature source and the liquid gets vaporized during this stage.
The vapor is then compressed to such a pressure that it can be condensed at a high temperature.
In the condenser, the heat is transferred to cooling water or air which is used for heating the houses.
By reversing the flow of the refrigerant, the same unit can be used to absorb heat from the rooms and reject it to the outside air during summer.
The coefficient of performance (COP) of a heat pump is defined depending upon the primary purpose for which it is used.
When heat output is a primary purpose, the COP is defined as the ratio of heat rejected (Q₁) to the work input (W)
For heat pump