Terrestrial heat well near zero temperature drop and heat exchange system
A heat exchange system and deep well technology, applied in geothermal power generation, heat collectors using groundwater as the working fluid, etc., can solve the problems of no breakthrough in heat exchange technology, affecting development enthusiasm, and low heat exchange efficiency in wells, so as to avoid Insufficient heat exchange, avoiding a large amount of loss, and high efficiency in running and lifting the well
Inactive Publication Date: 2018-06-05
沈国华
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Problems solved by technology
[0002] Geothermal deep well heat exchange technology is a method that uses the principle of heat exchange without water exchange to solve the dependence on groundwater resources and prevent groundwater level decline, groundwater pollution, thermal pollution and other problems. However, due to the core heat exchange technology There is no breakthrough, so there are defects such as serious temperature loss and small circulation volume, which directly lead to low heat exchange efficiency in the well, seriously affecting its economic benefits, and thus affecting the enthusiasm for development
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[0009] The geothermal deep well near-zero temperature drop heat exchange system provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0010] Such as figure 1 As shown, the geothermal deep well near-zero temperature drop heat exchange system provided by the present invention includes: heat exchange tube 1 in the thermal insulation section, heat exchange tube 2 in the heat exchange section, threaded pipe fittings 3, completely waterproof insulation material 4, and circulation pipeline 5 and pump 6; wherein the thermal insulation section heat exchange tube 1 is located at the inner upper part of the steel well wall tube 7 of the geothermal deep well, and the upper end is located at the wellhead; the heat exchange section heat exchange tube 2 is located at the inner lower part of the steel well wall tube 7, The upper end is connected with the lower end of the heat exchange tube 1 of the thermal i...
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A terrestrial heat well near zero temperature drop and heat exchange system comprises a heat preservation and heat insulation section heat exchange tube, a heat exchange heat exchange tube, a screw thread pipe fitting, a full type waterproof thermal insulation material, a circulation loop and a water suction pump. According to the terrestrial heat well near zero temperature drop and heat exchangesystem, the gradient temperature rising law of soil and rock is used, a certain temperature layer is designated as a middle demarcation point, the upper half part is a heat preservation and heat insulation section, heat preservation treatment is performed, and accordingly, the heat exchange efficiency is reduced. The lower half part is a heat exchange section, heat in the rock and soil is transmitted to cold water as possible, and the cold water is heated. By the layering design, the defect that the heat exchange amount is not enough due to the single temperature preservation structure is avoided, loss of a lot of heat due to single heat dissipation type pipes is avoided, and the heat exchange efficiency of the deep well geothermal well is seriously affected by the two conditions. Besides,the terrestrial heat well near zero temperature drop and heat exchange system has the advantages that the system is reusable, long in service life and high in corrosion resistance, the well descending and lifting efficiency is high, the cost is low and the like.
Description
technical field [0001] The invention belongs to the technical field of geothermal heat exchange, in particular to a near-zero temperature drop heat exchange system for deep geothermal wells. Background technique [0002] Geothermal deep well heat exchange technology is a method that uses the principle of heat exchange without water exchange to solve the dependence on groundwater resources and prevent groundwater level decline, groundwater pollution, thermal pollution and other problems. However, due to the core heat exchange technology There is no breakthrough, so there are defects such as serious loss of temperature and small circulation, which directly lead to low heat exchange efficiency in the well, seriously affecting its economic benefits, and thus affecting the enthusiasm for development. The sustainable and environmentally friendly development of geothermal energy is an inevitable way to utilize geothermal energy, so a breakthrough must be made to the original heat e...
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IPC IPC(8): F24T10/20
CPCY02E10/10
Inventor 沈国华
Owner 沈国华