Buried pipe heat exchange system with adjustable heat exchange loop

Abstract

The invention discloses a buried pipe heat exchange system with an adjustable heat exchange loop. The buried pipe heat exchange system comprises a first-stage water distributor, a first-stage water collector, a plurality of second-stage water distributors, and a plurality of second-stage water collectors; a plurality of water outlets and a water inlet are formed in each first-stage water distributor and each second-stage water distributor respectively, the plurality of water outlets in the first-stage water distributor are connected with water inlets of a plurality of second-stage water distributors through pipelines respectively; the first-stage water collector and the second-stage water collectors are provided with a water outlet and a plurality of water inlets respectively, the plurality of water inlets of the first-stage water collector are connected with the plurality of water outlets of the second-stage water collectors through pipelines respectively, the outer walls of the pipelines at the plurality of water inlets of the second-stage water collectors are provided with a heat preservation layer respectively; the plurality of water outlets of the second-stage water distributors communicates with a water inlet end of a heat exchange unit composed of a plurality of U-shaped buried pipes in parallel, and the water outlet end of the heat exchange unit communicates with a water inlet of the second-stage water collector. The device is simple and novel in structure, strong in functionality and capable of being flexibly applied.

Description

Technical field [0001] The invention relates to the technical field of geothermal energy utilization, in particular to a buried pipe heat exchange system with an adjustable heat exchange loop. Background technique [0002] The buried pipe heat exchanger is the core component of the ground source heat pump system. The heat transfer performance of the buried pipe heat exchanger determines the heat transfer efficiency of the entire ground source heat pump system, which is of great importance to the adjustment of the heat transfer of the ground source heat pump. Meaning. my country's geothermal resources are not only widely distributed but also very rich. The research on underground heat exchangers has broad application prospects and development value. [0003] Ordinary buried pipe heat exchangers cannot change the distance and depth of the heat exchange circuit, and are flexible; the distance between the inlet and outlet branch pipes of the buried pipe is very limited, resulting in d...

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Problems solved by technology

[0003] Ordinary buried pipe heat exchangers cannot change the distance and depth of the heat exchange circuit, and the flexibility is single; the distance between the inlet and outlet branch pipes of the buried pipe is very limited, resulting in direct heat exchange between the two pipes due to mutual contact, or heat conduction through the backfill between the buried pipes Indirect heat exchange, resulting in "thermal short circuit" phenomenon

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