| 摘要 |
A heat accumulator for the storage of energy comprises a mass of material (2), such as clay or chemical waste, situated in the soil and thermally insulated from the surrounding mass of soil by an insulating layer (3). The layer (3) comprises a plurality of separate thermally insulating boards (4). Each board (4) comprises a sheet of thermally insulating material (6) completely enclosed by a water tight foil layer (7). In a preferred embodiment, the layer (3) comprises at least two layers of boards (4) wherein the boards of one layer are staggered relative to the boards of the other layer. <IMAGE> |
