Solar-energy-combined dual-well closed enhanced type geothermal heating system

A dual-well closed-type heating system technology, applied in solar heating systems, solar thermal energy, solar thermal power generation, etc., can solve the problems of low heat extraction power, easy fluid leakage, and low thermal conductivity of rocks.

Active Publication Date: 2020-07-03
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, EGS mainly faces four problems: 1. High cost of hydraulic fracturing; 2. Difficult to control the direction of fractures;
Although DBHE is a promising geothermal development technology, it mai

Method used

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  • Solar-energy-combined dual-well closed enhanced type geothermal heating system
  • Solar-energy-combined dual-well closed enhanced type geothermal heating system
  • Solar-energy-combined dual-well closed enhanced type geothermal heating system

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Embodiment

[0023] Such as figure 1 As shown, a solar energy combined double-well closed-type enhanced geothermal heating system includes a first heating system, a second heating system and a heat storage system. The first heating system includes a circulation pump 1, a heat pump 2 and a double-well closed type enhanced geothermal system 3, double well closed enhanced geothermal system 3 includes injection well 31, production well 32 and horizontal well 34 connecting injection well 31 and production well 32, injection well 31, production well 32 and horizontal well 34 The outer sides are covered with well pipes, and part of the well pipes of the horizontal well 34 is covered with a cement sheath 35. The injection well 31 is connected with the circulation pump 1 and the first inlet 21 of the heat pump 2 in sequence, and the production well 32 is connected with the first outlet of the heat pump 2. 22, the second inlet 23 and the second outlet 24 of the heat pump 2 are connected to the targe...

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Abstract

The invention discloses a solar-energy-combined dual-well closed enhanced type geothermal heating system. The system comprises a first heat supply system, a second heat supply system and a heat storage system. The first heat supply system comprises a circulating pump, a heat pump and a dual-well closed enhanced type geothermal system body. The dual-well closed enhanced type geothermal system bodycomprises an injection well and a production well. The injection well is connected with the circulating pump and a first inlet of the heat pump in sequence. The production well is connected with a first outlet of the heat pump. Both a second inlet and a second outlet of the heat pump are connected with a target building. The second heat supply system comprises a solar thermal collector, a heat storage water tank and a hot water pump. An outlet of the solar thermal collector is connected with the heat storage water tank, the hot water pump and the target building in sequence. An inlet of the solar thermal collector is connected with the target building. According to the solar-energy-combined dual-well closed enhanced type geothermal heating system, solar energy and the dual-well closed enhanced type geothermal system body are combined to carry out heating during heating seasons, and the problem that solar energy is unstable is solved by utilizing the adjustment capacity of the geothermal system body; and heat of solar energy is stored into the geothermal system body during non-heating seasons.

Description

technical field [0001] The invention relates to the technical field of clean energy heating, in particular to a closed-type enhanced geothermal heating system combined with solar energy and double wells. Background technique [0002] For areas where hydrothermal geothermal resources are scarce, if large-scale exploitation of geothermal energy is required, two methods are often used, one is to use the traditional enhanced geothermal system (EGS), and the other is to use closed deep well heat exchangers ( DBHE). EGS creates high-permeability fractures in low-permeability rocks by means of hydraulic fracturing, and realizes convective heat exchange between fluid and rock. This heat exchange method can greatly improve the heat exchange of water and rocks, and is a way to realize thermal energy exploitation of dry hot rocks. a promising way. However, EGS mainly faces four problems: (1) high cost of hydraulic fracturing, (2) difficulty in controlling the direction of fractures, ...

Claims

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Application Information

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IPC IPC(8): F24D11/00F24D19/10F24S20/40F24T10/20
CPCF24D11/003F24D19/1015F24S20/40F24T10/20F24T2010/56F24D2200/32Y02E10/10Y02E10/40Y02B10/20Y02B10/70Y02B10/40
Inventor 卜宪标蒋坤卿王令宝李华山
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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