| 摘要 |
PURPOSE:To store large capacities of heat by a method in which water vapor of a temperature higher than the temperature of the ground is placed into the underground, diffused, and condensed to heat the ground and warm water is also impregnated into the ground. CONSTITUTION:When a hygroscopic substance 2 is heated by a heater 3 to high temperatures, the water in the hygroscopic substance is discharged in the form of water vapor. Although the water vapor so discharged becomes water by being cooled by soil 1, its sensible heat and latent heat of evaporation are discharged. When the heating of the heater 3 is stopped and cold water is passed through a heat recovery pipe 5 to cool the hygroscopic substance 2, the hygroscopic property of the substance 2 is increased as its temperature is lowered, the partial pressure of water vapor is lowered, and warm water held by the soil 1 is vaporized to water vapor, whereupon the heat of the soil is absorbed by water vapor. The water vapor so vaporized is absorbed by the substance 2, but if discharges its sensible heat and latent heat of vaporization to raise the temperature of the substance 2. The fluid in the pipe 5 can thus be heated by the substance 2. |
