| 摘要 |
For heat extraction from the groundwater, the latter is removed from a supply well, conducted through a tube condenser and again supplied to an absorption well. The heat extraction must take place in the plus-range in order to avoid freezing up of the pipes and to satisfy the water-supply conditions of still having a temperature of at least +4 DEG C after extraction. Very great problems arise in the case of the deposition of lime and other residues, as a result of freezing up and bursting of the water-bearing pipes, and as a result of direct penetration of brines, oils and refrigerants into the groundwater. According to the present invention, these disadvantages are excluded by the groundwater being introduced into an open container. Heat-extraction profiles are immersed in this water and the water is moved to accelerate extraction. After small pieces of ice have formed around the profiles during the extraction process, the water tank tips downwards, the pieces of ice fall into a worm conveyor and are conveyed into the open with the residual water, where the pieces of ice melt and are resupplied to the groundwater as melt and residual water.
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