Geothermal energy hot dry rock tree-shaped heat exchange system and heat exchange method thereof

Abstract

The invention discloses a geothermal energy hot dry rock tree-shaped heat exchange system and a heat exchange method thereof, and belongs to the technical field of clean energy. The technical problems that the geothermal energy hot dry rock heat extracting efficiency is low, and the underground heat exchange fluid wastage rate is high are solved. According to the technical scheme, carbon fibers and titanium-nickel metal wires are blended and woven into heat exchange tube single bodies, and the heat exchange single bodies and a heat exchange packaging sleeve are used for making a heat exchange tube set wrapped with a coating layer; and a separating plate is arranged at the bottom of a main shaft, the heat exchange tube set is arranged in the main shaft, and after the heat exchange tube set is subjected to separation of the separating plate, heat exchange tubes extend into corresponding auxiliary shafts. A heat exchange medium carrying high-temperature geothermal energy is obtained through the sequential steps that geothermal energy detection and drilling are conducted; the heat exchange tube single bodies are prepared; the heat exchange tubes are prepared and packaged; the heat exchange tube set is subjected to separation; and geothermal energy exchange is conducted. The main shaft and the auxiliary shafts are distributed in a tree shape, the number of the drilled shafts is decreased, and efficiently-intensified hot dry rock geothermal energy heat exchange is facilitated; and meanwhile, by adoption of the heat exchange tubes, the heat exchange efficiency is improved while waste of heat exchange medium resources is reduced.

Description

technical field [0001] The invention belongs to the technical field of clean energy, and in particular relates to a dendritic multi-point heat exchange system for geothermal dry hot rocks and a heat exchange method thereof. Background technique [0002] Compared with other new energy sources such as solar energy, wind energy and biomass energy, geothermal resources have the characteristics of wide distribution, little external influence (such as day and night, wind speed, temperature difference), low carbon emissions and maintenance costs, etc. Geothermal resources are mainly divided into Hydrothermal type and hot dry rock type. Hot dry rock type geothermal heat refers to the heat stored in high-temperature rock mass or magma at a depth of 3-10km, and the reservoir temperature can reach 100-650°C. At present, the hydrothermal type medium and low temperature geothermal mainly used by countries in the world only accounts for a very small part of the proven geothermal resources...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies in the prior art and solve the technical problems of low heat extraction efficiency of geothermal dry rock and high loss rate of underground heat exchange fluid, the present invention provides a tree-shaped multi-point heat exchange system for geothermal dry rock and its heat transfer method

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