System for efficiently exploiting geothermal energy in dry-hot rock by means of heat pipe

Abstract

The invention discloses a system for efficiently exploiting geothermal energy in dry-hot rock by means of a heat pipe. The system comprises the geothermal heat pipe, hypertonicity geothermal reservoirs formed in a high-temperature dry-hot rock target area and filled with fluid working mediums, and a heat exchanger and a heat utilization device which are located on the ground. The geothermal heat pipe is provided with heat pipe condensation sections, a heat pipe heat insulation section and a heat pipe evaporation section, wherein the heat pipe condensation sections, the heat pipe heat insulation section and the heat pipe evaporation section communicate sequentially. The heat pipe evaporation section penetrates through the hypertonicity geothermal reservoirs, the heat pipe condensation sections and the heat utilization device conduct heat exchanging through the heat exchanger. According to the system for efficiently exploiting the geothermal energy in the dry-hot rock by means of the heat pipe, the problem that the heat recovery rate of a conventional geothermal heat pipe heat recovery technology is too low is solved. The geothermal energy in the dry-hot rock is exploited through the geothermal heat pipe, and the heat evaporation section of the geothermal heat pipe is arranged in the geothermal reservoirs, by means of the thermal convection effect of the fluid working mediums in the geothermal reservoirs, the heat recovery quantity of the heat pipe is greatly increased, and the economy of the heat pipe mining dry-hot rock geothermal technology is improved.

Description

technical field [0001] The invention relates to the field of development and utilization of geothermal energy, in particular to a system for exploiting hot dry rock geothermal energy efficiently by using heat pipes. Background technique [0002] In recent years, with the accelerated reduction of the total amount of global fossil fuels and the increasing environmental pollution caused by their development and utilization, the development of renewable and clean energy is imminent. The enhanced (or engineered) geothermal system (Enhanced or Engineered Geothermal System, EGS) with the goal of mining and utilizing the thermal energy in low-permeability crystalline hot dry rocks 3km to 10km underground is gradually becoming the focus of new energy development in countries around the world. one. [0003] Conventional EGS systems increase the permeability of deep underground rocks through hydraulic fracturing, chemical corrosion, etc. to form artificial heat storage, and then build...

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a system for efficiently exploiting hot dry rock geothermal energy by using heat pipes, which solves the problem of low heat recovery rate of conventional geothermal heat pipe heat recovery technology

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