| 摘要 |
PROBLEM TO BE SOLVED: To circulate the hot water for use in a facility storing the hot water inside the bedrock. SOLUTION: When storing the hot water in a reservoir 1 inside the bedrock and taking the stored hot water out to utilize it for power generation, in a process for storing the hot water in the reservoir, a part of the hot water already stored in taken out of the bottom part of the reservoir to utilize it as the steam generating water, and in a process for utilizing the hot water, the steam is taken out of a steam storage part 1a in an upper part of the reservoir for utilization, and the warm water obtained by distilling the steam after utilizing it is returned to the bottom part of the reservoir. A steam pipe 3 is connected to a top part of the reservoir, and a hot water pipe 4 is connected to the bottom part of the reservoir. A lower end of the hot water pipe is connected to the bottom part of the reservoir through a U-bent 4a.
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