| 摘要 |
PURPOSE:To prevent dry out of a heat collecting surface, to increase a heat carrying amount, and to effect efficient recovery and fetching of a terrestrial heat, by a method wherein liquid phase working fluid is stored in a liquid reservoir part independently separated from a heat incoming spot, and is returned to a spot where heat incomes in a state in that the working fluid is isolated from a steam flow. CONSTITUTION:The temperature of a heat dissipation part 15 is set to a value lower than an underground temperature, and with a flow rate regulating valve 19 opened, working fluid 12 in a reservoir 14 is caused to outgo to a reflux distribution pipe 20, and the working fluid is injected toward the inner wall surface of a closed pipe 11. The liquid phase working fluid 12 is uniformly distributed and fed to the inner wall surface of the closed pipe 11, is vaporized and evaporated resulting from receipt of a terrestrial heat during flow down, and flows toward the heat dissipation part 15. The liquid phase working fluid 12 is fed directly to a spot in the vicinity of the inner wall surface of the closed pipe 11 through the reflux distribution piston 20, a section, where a convection flow is produced between a steam flow and the working fluid, is extremely shortened, and the working fluid is prevented from flying. The opening of a flow rate regulating value 19 is regulated so that an amount of the working fluid vaporized by a terrestrial heat becomes equal to an amount of the working fluid fed through the flux distributing pipe 20, and this regulation prevents a liquid column from being produced to the bottom part of the closed pipe 11, and permits the whole of the inner surface of the closed pipe 11, positioned to a heat absorbing part 13, to form the vaporizing surface of the working fluid. |
