Reasonably priced and environmentally friendly at the same time
The principle of the refrigerator is familiar to all of us. The heat is removed from the interior of the refrigerator using a cooling circuit, and subsequently the heat is given off outside the device.
A heat pump functions in the same way, only in the opposite direction. It pulls heat from the environment and uses it, in order to heat our rooms or warm our water to a corresponding temperature in an inexpensive and environmentally friendly way.
The heat pump is a closed circuit. Coolant circulates in it, which evaporates at very low temperatures. In this process, it removes heat from the surroundings. Subsequently, the evaporated coolant is compressed by a compressor. To operate the compressor, energy in the form of electrical current has to be expended. Thanks to the higher pressure, the temperature then rises. In the end, the coolant is made fluid, whereby the stored heat is given off to the heating system. Afterwards the circuit begins anew.
Since a heat pump pulls 75 percent of its heating output from the environment and, simultaneously, only needs 25 percent as operating energy, it represents a very inexpensive and environmentally friendly was to obtain energy to heat (or cool).