Heat contained in underground water is also geothermal heat and is usually used indirectly. Heat pumps taking heat from water are called “water-water“. The used ground water should be chemically suitable, of sufficient purity and of a temperature of +8 °C at least during the whole heating season and available in sufficient quantity (e.g. a 10 kW water-water heat pump will require a flow-through quantity of about 28 l / min). Such sources are fairly scarce, however, when available, the water is led directly into the heat pump evaporator. During the heating season underground water has the highest temperature in comparison with other natural sources of heat, and the COP’s of water-water heat pump is often the best.
Heat is extracted from underground water by pumping the water from a well into the heat pump evaporator. In it the heat is extracted and the cooled down water is returned into the ground via a drain well. The depth and the mutual position of both wells must be discussed with a hydro-geological expert with regard to local hydro-geological conditions. Then, in case the depth and situation of wells are proper, neither underground water losses can occur nor its energetic potential can drop.
For the utilization of geothermal heat of underground water we can offer you the HPWW compact heat pumps. These heat pumps yield very high conversion of available energy and ensure an outstanding ratio of purchase price to performance. Application of the HPWW heat pumps may be also useful when they can be incorporated in the industrial process a waste product of which is hot water. detailed
For utilization of the heat of underground water we can offer you our compact heat pumps HPWW. These heat pumps yield a very high energetic effect and provide an excellent ratio of purchase price and performance. The application of the HPWW heat pumps is suggested also in cases when they can be integrated in process plants the waste product of which is warm water. detailed
