District heating from geothermal water sources - uses heat pump to raise temperature and increase output for groups of buildings

摘要

Water from a geothermal source is pumped through heat exchangers (16, 17, 18) in series before being returned to the source. The output of one of the heat exchangers is used for district heating. The water heating a first group of buildings (G1) is taken through the condenser (C1) of a heat pump to raise its temperature before it is used further in other heat exchangers. The return to the geothes through the evaporator (E1) so that more heat is taken out of the water before it is returned to the source. In further groups of buildings, the heating water passes through condensers and evaporators of heat pumps so that its temperature is raised at entry to the buildings and lowered at exit.