| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an underground freezing control type storage facility, in which the frozen ground around an underground storage tank is economically maintained and managed for a long period of time. <P>SOLUTION: The underground freezing control type storage facility of low-temperature liquified gas includes: storage tanks 2 of low-temperature liquified gas LG constructed by vertically excavating a plurality of points Q1, Q2, Q3, Q4, ... spaced from each other on the surface E of the ground; heat medium pipes 10U vertically downwardly formed respectively at a plurality of positions along a loop line U surrounding the plurality of points Q1, Q2, Q3, Q4, ...; heat medium pipes 10R vertically downwardly formed at a plurality of positions along border lines R between the neighboring points Q1, Q2, Q3, Q4, ...; and a heat medium circulation device 15 circulating a heat medium T into each of the heat medium pipes 10U, 10R. The freezing control around each of the storage tanks 2 is performed by circulation of the heat medium T. Preferably, the heat medium circulation device 15 includes control means 16U, 16R to control the circulation of the heat medium T with respect to each heat medium pipe 10U, 10R, independently of each other. The plurality of points Q1, Q2, Q3, Q4, ... can be respectively located at vertex positions of a polygon on the surface E of the ground. <P>COPYRIGHT: (C)2013,JPO&INPIT |
