| 摘要 |
The accumulator medium of the heat accumulator consists of various solid materials (5, 6, 9). In this case, the earth, which is surrounded at least partially by an insulation (8), forms the greatest proportion of the heat-accumulator medium in terms of volume. For supply and removal of heat transfer media in the form of air or water, lines (10, 11) to stone layers (9) and connections (2, 3) to pipes (1) are provided. The maintenance costs and the risk of accident are lower than in known heat accumulators. <IMAGE>
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