| 摘要 |
PURPOSE:To enable heat exchange in a latent heat accumulating device for storing power for midnight by an arrangement wherein a heat accumulating material of a type utilizing latent heat and a working liquid whose density is higher than that of the fused or liquid heat accumulating medium are charged in the device and a heating medium flow passage is formed in the outer periphery thereof. CONSTITUTION:The arrangement is made such that when water as a heating medium flows in through an inlet 7, vapor 9 of a working liquid or Freon R113 radiates heat through a vapor phase zone 6 in the inner wall of a heat accumulating container 3 to thereby liquefy. By the liquefaction, the vapor pressure in the vapor phase zone 6 falls, whilst the freon in the heat accumulating material 4 of the type utilizing latent heat comprised of sodium acetate trihydrate evaporates to generate bubbles 10 so as to make up for the fall in the vapor pressure. The liquefied Freon has an increased specific gravity, and so it settles in the heat accumulating material 4, but part of it deprives heat from the material 4 so as to vaporize again. Whilst, in the heat transfer surface in the liquid phase part, the material 4 radiates its latent heat to thereby solidify. However, because the material 4 is stirred violenty by the liquid and bubbles of Freon, it does not deposit on the heat transfer surface so that the latent heat can be taken out efficiently. |
