A heat pump is a refrigeration machine used to switch heat from one room or house to another. The heat pump is designed to take heat from a medium-temperature source, akin to out of doors air, and convert it to higher-temperature heat for distribution within a structure. By way of a specifically designed reversing valve, the pump also can extract heat from the indoor air and expel it outdoors.
Because a heat pump system makes use of the reverse-cycle principle of operation, its working precept is sometimes referred to as reverse cycle conditioning or reverse-cycle refrigeration. The latter term isn’t correct because there are fundamental differences between the working rules of a heat pump and a real refrigeration unit. The confusion probably stems from the truth that through the cooling cycle, the operation of a pump is identical to that of the mechanical refrigeration cycle in a packaged air conditioning unit. The indoor coil operate as an evaporator, cooling the indoor air. The out of doors coil is condenser, in which the new refrigerant gas releases heat to the outside air.
Heat Pump Operating Ideas
The two principal phases of heat pump operation are the heating and cooling cycles. A third section, the defrost cycle is used to protect the coils from extreme frost buildup.
Heating Cycle
The heating cycle of a heat pump begins with the circulation of a refrigerant by means of the out of doors coils. Initially, the refrigerant is in a low-pressure, low-temperature liquid state nevertheless it quickly absorbs sufficient heat from the outside air to raise its temperature to the boiling point. Upon reaching the boiling point, the refrigerant modifications into a sizzling vapor or gas. This gas is then compressed by the compressor and circulated under high pressure and temperature by the indoor coils, where it comes into contact with the cooler room air that circulates around the coils. The cooler air causes the gas to chill, condense and return to the liquid state. The condensation of the refrigerant vapor releases heat to the interior of the structure. After the refrigerant has returned to a liquid state, it passes by a special pressure-reducing system and back via the coils where the heating cycle starts throughout again.
Cooling Cycle
In the cooling cycle, the reverse valve causes he stream of the refrigerant to be reversed. Consequently, the compressor pumps the refrigerant in the opposite direction in order that the coils that heat the building or space in cold climate cool it in warm weather. In different words, the heat is extracted from the interior, cycled by way of the heat pump after which expelled outside the building or area during the condensation of refrigerant.
Defrost Cycle
Because the outside air is relatively cool when the heat pump is on the heating cycle, and the out of doors coil is performing as an evaporator, frost kinds on the surface of the coil under certain conditioners of temperature and relative humidity. Because this layer of frost on the coils interferes with the environment friendly operation of the heat pump, it must be removed. This is achieved by placing the pump by a defrost cycle.
If you loved this article and you wish to receive more info regarding pompe de caldura aer aer i implore you to visit our own page.