Middle-deep layer single well heat removal system adopting convection speed-increasing pipe to enhance heat exchange
A technology of strengthening heat exchange and speed-increasing tube, which is applied in the direction of household heating, heating system, household heating, etc., to achieve the effect of simple structure, scientific and reasonable design, and enhanced convective heat transfer.
Pending Publication Date: 2022-04-08
TIANJIN UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a medium-deep single well heat extraction system that uses convective speed-up tubes to enhance heat transfer. The thermal effect can ensure the circulating heat exchange of the fluid in the wellbore and completely overcome the difficulty of recharging; at the same time, the convection increasing tube can be used to strengthen the natural convection between the geothermal water and the fluid in the tube, thereby improving the heat extraction efficiency of the single well heat exchange
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[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.
[0011] A medium-deep single-well heat extraction system that uses convective speed-increasing tubes to enhance heat transfer, such as figure 1 As shown, it includes an inner casing 5 arranged in the geothermal well 3. The inner casing is made of a material with low thermal conductivity to reduce heat loss. An inner casing filter pipe 2 is arranged at the bottom of the inner casing. The lower part of the inner casing filter pipe is provided with a convection speed-up tube 1. The convection speed-up tube is set in the underground aquifer, and the natural convection is enhanced through the density difference of the aquifer to enhance heat exchange. The convection speed-up tube is arranged under the conve...
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The invention relates to a medium-deep layer single well heat removal system adopting a convection speed-increasing pipe to enhance heat exchange, which comprises an inner sleeve arranged in a geothermal well, an inner sleeve water filter pipe arranged at the lower part of the inner sleeve, and a convection speed-increasing pipe arranged at the lower part of the inner sleeve water filter pipe and arranged at an underground aquifer. The lower portion of the convection speed-increasing pipe is provided with a convection speed-increasing pipe water suction port, and the two sides of the upper portion of the convection speed-increasing pipe are symmetrically provided with convection speed-increasing pipe water outlets. The device is convenient to install and low in manufacturing cost, plays a role in enhancing heat exchange of the convection speed-increasing pipe, can ensure circulating heat exchange of fluid in a shaft, and completely overcomes the problem of difficulty in recharging; and meanwhile, natural convection of geothermal water and fluid in the pipe can be enhanced by utilizing the convection speed-increasing pipe, so that the heat extraction efficiency of single well heat exchange is improved.
Description
technical field [0001] The invention belongs to the field of utilization of geothermal resources, and relates to a medium-deep single-well heat extraction technology, in particular to a medium-deep single-well heat extraction system that adopts a convective speed-increasing tube to enhance heat exchange. Background technique [0002] With the increasing severity of the greenhouse effect and air pollution, traditional fossil fuels dominated by coal can no longer meet the needs of my country's environment-friendly social development. The development and utilization of clean alternative energy such as solar energy, wind energy, and geothermal energy have attracted more and more attention, and their proportion in the energy composition will increase year by year. Geothermal energy is a clean and renewable energy resource that exists in the form of thermal energy. Compared with solar energy and wind energy, it uses heat for heat without conversion, has natural advantages, and is ...
Claims
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IPC IPC(8): F24T10/17F28D9/00F24D19/00F28F19/01
CPCY02E10/10
Inventor 雷海燕李嘉舒张伟戴传山
Owner TIANJIN UNIV