| 摘要 |
PURPOSE:To construct an extremely large heat storage tank having a good efficiency under the ground by surrounding the periphery of a natural water retaining layer by natural water impervious layers spaced apart up and down and water impervious walls artificially constructed, and inserting a pipe into the water retaining layer in the interior thus surrounded. CONSTITUTION:The titled heat storage tank is a tank which utilizes a place where a water impervious layer 3 is formed by a rock bed or the like into a groove shape, and a clayey water impervious layer 2 exists at the upper part of the layer 3. A water retaining layer 1 consisting of pebbles and the like exists in the groove-like portions. Walls 4 are provided separately from each other between the water impervious layers 2 and 3, and a part of the outer periphery of the water retaining layer 1 is surrounded by the walls 4 and the water impervious layers 2 and 3. Embedded pipes 6 are inserted through two independent water retainining layers 1, and pipes 5 are also inserted therethrough. In summer season, hot water heated by a solar water heater is poured into a heat storage tank on the left side by means of a pump P. In winter season, hot water pumped up and the heat thereof is utilized by a heat utilizing body 7 such as a space heater or the like. Water whose temperature becomes relatively low by the above utilization is further cooled by external air, and is poured into a heat storage tank on the right side. In summer season, cooled water is pumped up, and can be utilized for space cooling.
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