| 摘要 |
PURPOSE:To escape gas, produced from earth in the vicinity of the bottom part or the side wall of solar pond, without staying therein and to prevent breakdown of the solar pond, by a method wherein a sheet being impermeable to liquid but permeable to gas or steam is laid to a side wall part and a bottom part. CONSTITUTION:A waterproof sheet, e.g. polytetraphloroethylene porous material, being impermeable to liquid but permeable to gas, is used between a solar pond 1 and earth 2. When a gas pressure increases, gas permeates the sheet into liquid in the solar pond situated above the sheet. Since bubbles, incoming through the sheet to the interior of liquid, gradually raise in such a state as to form small bubbles thanks to very fine meshes of the sheet, a concentration gradient in the solar pond, produced by salt, is prevented from breaking down. |
