| 摘要 |
<p>Snow lying on a road (5) or building structure is melted and removed without sprinkling water on the snow by pumping up from a well (A) and circulating underground water, which is contained in an underground aquifer (7) and warmed by geothermy of the aquifer utilizing the heat retaining function thereof, through pipe arrangement (4) laid under the surface of the road (5) or building structure. The used and cooled underground water is returned into another artesian well (B) without being wasted and exposed to the atmosphere. Underground water warmed by the solar heat and stored in the aquifer (7) in a hot season may be preferably used in a snowy and cold season. An antifreezing liquid may be filled and circulate in the pipe arrangement (4) to perform effective heat transfer through a heat exchanger (10) between the antifreezing liquid and the underground water which circulates from one well to the other well. A pipe (11) having excellent crystal structure of the welded joint portion can be used for the pipe arrangement.</p> |
