Heat source water piping, underground heat utilization heat pump system and heat exchange method

摘要

To provide a heat source water pipe for improving heat exchange efficiency with a simple structure.SOLUTION: A heat source water pipe includes: a first branch pipe provided between a branch point A at a first connection X side, and a branch point B of a second connection Y side on a main pipe; a second branch pipe provided between a branch point C provided between the first connection X and the branch point A, and a branch point D provided in a position far from a first side heat exchanger than the branch point B at the second connection Y side on the main pipe; a circulation pump provided in a position far from the first side heat exchanger than the branch point A on the main pipe, and discharging toward the branch point A; a first switch means capable of switching a flow channel at a first branch pipe side and a flow channel at a branch point C side in the branch point A; and a second switch means capable of switching a flow channel at a second branch pipe side and a flow channel at a branch point B side in the branch point D.SELECTED DRAWING: Figure 1