| 摘要 |
PURPOSE:To provide a solar pond having no deterioration in performance by a method wherein a sheet material at a side wall other than a non-convection flow layer of a solar pond is of a sheet material having a high rate of reflection. CONSTITUTION:Although a bottom surface and a side wall of a thermal accumulation layer 4 of a solar pond 1 are covered with a black sheet 5 in order to improve a rate of absorption of solar light, a side wall and a ground part other than a non-convection layer 3 are covered with, for example, a white sheet material 6 having a low optical absorption and a high rate of reflection. Due to this fact, the solar light is not absorbed by the sheet material 6, but most of it are reflected by the sheet material and reach a thermal accumulation layer 4 and effectively accumulated there. Thus, an abnormal heating is salt water at the sheet material and a part near the sheet material is not produced, and a gradient in concentration can always be kept constant and a thermal loss can be prevented from being increased upwardly. This may be helpful for increasing the temperature of the sheet material through a direct radiation of solar light and preventing the deterioration of the material. |
