A heat pump is a device that transfers heat energy from a source of heat to a destination called a “heat sink”. Heat pumps are designed to move thermal energy in the opposite direction of spontaneous heat transfer, by absorbing heat from a cold space and releasing it to a warmer one. A heat pump uses external power to accomplish the work of transferring energy from the heat source to the heat sink.Heat pumps are used in heating, cooling and refrigeration applications. In each of these cases, the heat pump moves thermal energy in the opposite direction of spontaneous heat transfer. There are some other things you need to know before you buy a heat pump that we will share in this blog. But are heat pumps better than ACs?
How Does a Heat Pump Work?
There are many types of heat pumps but most of them follow the same general principles. A heat pump has four main components: an evaporator, a condenser, a compressor, and an expansion valve (or metering device). The refrigerant fluid goes through a cycle of evaporation and condensation as it is alternately drawn into and released from the compressor.
As the refrigerant passes through the evaporator, it vaporizes and absorbs heat from the surrounding air, cooling the air in the process. The now warm refrigerant vapor is drawn into the compressor where it is compressed, raising its temperature. The hot refrigerant vapor then passes through the condenser where it releases its heat to the surrounding air and condenses back into a liquid. Finally, the refrigerant passes through the expansion valve where its pressure is reduced, cooling it and causing it to evaporate once again. And the cycle begins anew. If this working process is perfect, you are able to save your home’s heat pump from damage.
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