Underground heat store with ground heat collector - comprises concrete tank containing sand or water covered over with soil for landscaping

摘要

The store is used for the heat energy supplied by solar collectors or absorbers and simultaneously acts as a collector for the ground heat. It comprises a tank inserted in a ground pit with a concrete bed (14) overlaid by a water-tight elastomer skin (4) and containing sand or water acting as the heat storage medium (9). A series of pipes (10) carrying the heat transfer fluid are embedded in the heat storage medium (9) to transfer heat to it from a solar collector etc. and to transfer heat from it to a heat pump or underfloor heating system. The surface of the heat storage medium (9) is covered by a heat insulation layer (2) comprising a number of superimposed layers over which the soil etc. is replaced.