Heat pumps
The principle of heat pumps is simple. Underneath the earth's surface temperatures are so high that it is worthwhile drilling a hole and using the warmth for heating purposes. A liquid is then heated to between 80 and 100 , a heat exchanger uses this heat to heat the thermal circuit and this in turn provides central heating.
Heat pumps are among the most efficient heating and water-heating systems since they use solar radiation which is stored in the atmosphere, in the ground or in ground water throughout the year. This free environmental energy supplies the heat pump with about 75 % of its thermal energy. This means that a heat pump requires only 25 % extra energy in the form of electricity to produce 100 % heating power. The heat pump can be supported with solar energy in order to optimise the energy consumption.
