Middle-deep ground temperature compound mode buried pipe heat exchange device

Abstract

The invention provides a middle-deep ground temperature compound mode buried pipe heat exchange device, belongs to the technical field of heat exchange and heat conduction of geothermal energy, and solves the technical problems that in the prior art, a device is complex in structure, high in operation energy consumption, and low in heat exchange efficiency, and is likely to cause surface subsidence or threaten and pollute an underground water source. The heat exchange device comprises a deep buried heat exchange pipe filled with a first heat exchange working medium and buried in the undersoil. The two ends of the deep buried heat exchange pipe are connected with user sides. One or more middle buried heat exchange pipes filled with a second heat exchange working medium and buried in the undersoil are arranged on one side of the upper end of the middle buried heat exchange pipe. The two ends of the middle buried heat exchange pipe are separately connected with the user sides. The deep buried heat exchange pipe is divided into a heat insulation area and a heat exchange area from top to bottom. All or part of the middle buried heat exchange pipes are located in the heat insulation area. The heat exchange device has the advantages of being simple in structure, high in heat exchange efficiency and high in rate of geothermal utilization.

Description

technical field [0001] The invention belongs to the technical field of geothermal energy heat exchange and heat conduction, and in particular relates to a heat exchange buried pipe device. Background technique [0002] Geothermal energy is a kind of clean energy with huge reserves, and the rational development and utilization of geothermal energy is more and more favored by people. The deep geothermal technologies that have been developed and applied, such as geothermal power generation, geothermal heating, etc., mostly use the natural steam or hot water stored in the ground from geothermal wells to the surface for use, which is inefficient and will lead to ground subsidence over time; Irrigation technology will pose a threat and pollution to groundwater sources; the in-depth utilization of geothermal energy is affected by uncertain factors such as local geological conditions, the utilization range is small, and the technical conditions are harsh. These problems restrict the...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the above problems, to provide a medium-deep ground temperature compound mode heat exchange buried pipe device; to solve the complex structure of the equipment in the prior art, high energy consumption in operation, low heat exchange efficiency, and long-term use Technical problems that cause land subsidence or pose a threat and contamination to groundwater sources, etc.

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