| 摘要 |
PURPOSE: A heat exchanger for a heat pipe and an integral steel pipe using underground heat is provided to prevent corrosion due to moisture in a soil layer and a rock layer since the outer surface of a steel pipe buried in the soil layer and the rock layer is coated with coating agent. CONSTITUTION: A heat exchanger for a heat pipe and an integral steel pipe using underground heat comprises a heat transfer unit, a heat exchange unit, a flow-rate control unit and a warning tape. The heat transfer unit comprises a steel pipe and a heat pipe. The steel pipe forms an underground bore hole on the ground surface. The steel pipe is buried in a soil layer(30) and a rock layer(40). The steel pipe is coated with coating agent. The coating agent prevents corrosion due to moisture in the soil layer and the rock layer. The heat exchange unit is buried in a sand layer(20) on the steel pipe. The heat exchange unit heat-exchanges fluid in the fluid pipes of the heat transfer unit.
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