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Heat storage type geothermal energy full-well-section dry well heat collection system and application

A technology of geothermal energy and the whole well section, applied in the direction of geothermal energy, geothermal energy power generation, application, etc., can solve the problems of heat loss and low outlet water temperature, achieve the effect of reducing quantity, reducing initial investment, and highlighting economic advantages

Active Publication Date: 2021-02-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method that can effectively solve the serious heat loss and low outlet water temperature existing in the existing system of using dry geothermal wells with little or no water output. and other issues, the thermal geothermal energy full-well section dry well heating system applied to winter heating and summer heat storage conditions at the same time

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  • Heat storage type geothermal energy full-well-section dry well heat collection system and application
  • Heat storage type geothermal energy full-well-section dry well heat collection system and application
  • Heat storage type geothermal energy full-well-section dry well heat collection system and application

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specific Embodiment approach

[0031] In the heat storage condition in summer, the opening and closing conditions of the water pumps and valves are as follows: the middle water injection pump is 2 open, the outer water outlet valve is 15 open, the outer water pump is 16 open, and the other water pumps and valves are closed. The working process is as follows: , the hot water in the heat pump unit 1 enters the middle channel 7 through the middle water injection pump 2, and directly enters the outer channel 6 under the action of the outer pump 16, and will not continue to enter the high temperature section 9 of the geothermal well downward for heat exchange. In channel 6, the hot water exchanges heat with the low-temperature section 10 of the geothermal well, and transfers the heat in the hot water to the rock formation in the low-temperature section 10 through heat conduction, realizing the heat storage process in summer, and the water after heat exchange is pumped through the outer layer. The water pump 16 en...

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Abstract

The invention relates to a heat storage type geothermal energy full-well-section dry well heat collection system, the system comprises a heat collection and supply unit and an underground heat collection unit, the underground heat collection unit comprises a center pipe, the center pipe is coaxially sleeved with a sleeve, the center pipe is inserted into and penetrates through a low-temperature layer and a high-temperature layer of a geothermal well, and the sleeve is inserted into the low-temperature layer. The heat collection system comprises a heating loop and a heat storage loop, and is further innovatively provided with a preheating and heat preservation loop, and the preheating and heat preservation loop is composed of a heat pump unit, an outer-layer water injection pump, an outer-layer water injection valve, an outer-layer channel, an inner-layer channel, an inner-layer water suction pump and a bypass valve. The system breaks the dependence of a geothermal heating building group on a hydrothermal geothermal heating system, dry geothermal wells without water or with less water yield can be converted into a single-well mining system, each geothermal well is fully utilized, and the number of the geothermal wells can be reduced under the same heating condition, so that the initial investment of the geothermal heating system is reduced, and the economic advantage highlighting.

Description

technical field [0001] The invention belongs to the field of exploitation and utilization of geothermal resources, and relates to a technology for exploitation and utilization of deep carbonate rock geothermal resources, in particular to a heat storage type geothermal energy full well section dry well heating system and its application. Background technique [0002] With the rapid development of my country's economic construction, the demand for energy is increasing rapidly. Traditional energy such as coal has a serious impact on the ecological environment. Increasing the development and utilization of clean and renewable energy is an important measure to change the energy development mode and adjust the energy structure. [0003] Deep carbonate rock geothermal resources, as a clean energy source, are getting more and more attention in northern heating. For the development of mid-deep geothermal energy, the current domestic main mode is mining and extracting groundwater hot w...

Claims

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Application Information

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IPC IPC(8): F24T10/15
CPCF24T10/15F24T2010/56Y02E10/10
Inventor 张伟刘东喜张家琪孟庆瑶吕心力任亚鹏柳佳丽
Owner TIANJIN UNIV
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