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Device and method for extracting and utilizing geothermal energy

A technology of geothermal energy and heat exchange device is applied in the field of devices for extracting and utilizing geothermal energy, which can solve the problems of high fluid rate, high consumption and high cost, and achieve the effects of expanding the diameter of the wellbore, improving the heat absorption efficiency and saving the amount of consumption.

Inactive Publication Date: 2016-06-15
姚国敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It costs a lot, and there are problems such as low utilization efficiency, complex equipment, and high cost. The specific manifestations are: the geothermal extraction efficiency is generally about 1-5%, and the underground heat exchange loss fluid rate is high (about 7%-12%) )

Method used

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  • Device and method for extracting and utilizing geothermal energy
  • Device and method for extracting and utilizing geothermal energy
  • Device and method for extracting and utilizing geothermal energy

Examples

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Effect test

Embodiment 1

[0091] Such as figure 1 and figure 2 As shown, a device for extracting and utilizing geothermal energy includes: a wellbore 7, an outer pipe 2, a liquid inlet pipe 11, a liquid outlet pipe 12 and a heat exchange device 9; the top and the bottom of the wellbore 7 are open, and the bottom of the wellbore 7 Deep into the geothermal source rock formation 15, the wellbore 7 and the outer pipe 2 are filled with a first liquid medium;

[0092] The top of the outer pipe 2 is closed and the bottom is open, and the top of the outer pipe 2 is provided with a thermometer 1 for conveniently observing the temperature inside the outer pipe 2; the outer pipe 2 is sleeved in the wellbore 7, and the outer pipe 2 2 and the wellbore 7 are fixed by the cement sheath 4, the material of the cement sheath 4 is oil field cement, the upper part of the outer pipe 2 is a heat exchange section, and the middle part of the outer pipe 2 is a heat preservation section, The lower part of the outer pipe 2 is...

Embodiment 2

[0110] Such as image 3 and Figure 4 As shown, a device for extracting and utilizing geothermal energy includes: a wellbore 7, an outer pipe 2, a liquid inlet pipe 11, a liquid outlet pipe 12 and a heat exchange device 9; the top and the bottom of the wellbore 7 are open, and the bottom of the wellbore 7 Deep into the geothermal source rock formation 15, the outer pipe 2 in the wellbore 7 is equipped with a first liquid medium;

[0111] The top of the outer pipe 2 is closed and the bottom is open, and the top of the outer pipe 2 is provided with a thermometer 1 for conveniently observing the temperature inside the outer pipe 2; the outer pipe 2 is sleeved in the wellbore 7, and the outer pipe 2 2 and the wellbore 7 are fixed by a cement sheath 4, the material of the cement sheath 4 is oil field cement, the upper part of the outer pipe 2 is a heat exchange section, and the middle part of the outer pipe 2 is a heat preservation section, The lower part of the outer pipe 2 is a...

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Abstract

The invention relates to a device and a method for extracting and utilizing geothermal energy. The device for extracting and utilizing the geothermal energy, disclosed by the invention, comprises a shaft, an outer tube, a liquid inlet tube, a liquid outlet tube and a heat exchange device; the top part and the bottom part of the shaft are separately unenclosed, and the bottom part of the shaft goes deep into a geothermal energy rock stratum; a first liquid medium is held in the shaft and the outer tube; the top part of the outer tube is enclosed, and the bottom part of the outer tube is unenclosed; the outer tube is fixedly sheathed in the shaft; the upper part of the outer tube is a heat exchange section, the middle part of the outer tube is a thermal insulation section, and the lower part of the outer tube is a heat absorption section; the heat absorption section is located in the geothermal energy rock stratum; the heat exchange device is arranged at the outer side of a position corresponding to the heat exchange section of the outer tube; one end of the liquid outlet tube is connected with the liquid outlet of the outer tube, and the other end of the liquid outlet tube is connected with the liquid inlet of a heat supply system; the liquid outlet end at the bottom part of the liquid outlet tube penetrates through the top part of the outer tube and extends into the shaft and communicates with the first liquid medium; and the top part of the liquid inlet tube is connected with the liquid outlet of the external power supply system. The device disclosed by the invention is high in heat efficiency, simple in structure, low in cost, and the like.

Description

technical field [0001] The invention relates to the field of new energy utilization, in particular to a device and method for extracting and utilizing geothermal energy. Background technique [0002] Currently, the whole world is looking for green energy. Solar energy and wind energy have become more popular, and geothermal energy has also attracted widespread attention. Geothermal resources are mainly divided into hydrothermal type and dry hot rock type. Among them, medium-high temperature dry hot rock formations or high-gradient geothermal formations are very rich in reserves on the earth. However, the development of geothermal technology is not satisfactory. [0003] Because hot dry rocks have no permeability, no pores, and deep reservoirs, the current technology is mostly artificial fracturing to create formation fractures and use water injection to produce them. It usually requires multiple wells to be used together, for example, high-pressure injection of water at a...

Claims

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Application Information

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IPC IPC(8): F24J3/08
CPCY02E10/10F24T10/30
Inventor 姚国敏
Owner 姚国敏
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