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Enhanced geothermal and solar combined power generation method and system

A power generation system and combined power generation technology, applied in geothermal energy systems, solar thermal power generation, mechanical power generated by solar energy, etc., can solve the problems of development and utilization limitations, poor operating stability of solar power generation systems, and inability to be used as base loads, etc.

Active Publication Date: 2015-04-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, solar energy is affected by factors such as weather, and the operation stability of solar power generation systems is not good, so it cannot be used as a base load guarantee, and its development and utilization are limited.

Method used

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  • Enhanced geothermal and solar combined power generation method and system
  • Enhanced geothermal and solar combined power generation method and system
  • Enhanced geothermal and solar combined power generation method and system

Examples

Experimental program
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Embodiment

[0042] Embodiment: In the enhanced geothermal system 1, the first thermal storage layer 11 is located at a depth of 3000 m underground, and its temperature is 145° C.; the second thermal storage layer 12 is located at a depth of 6,000 m underground, and its temperature is 225° C. According to the technical requirements of the enhanced geothermal system 1, the first injection well 13 and the first production well 14 are both arranged in the first thermal reservoir 11, and the second injection well 15 and the second production well 16 are both arranged in the In the second heat storage layer 12.

[0043] Inject CO with a pressure of 17.8MPa, a temperature of 57°C, and a flow rate of 132kg / s into the first injection well 13 2 , CO 2 Inject the first thermal reservoir 11 through the first injection well 13, CO 2 After absorbing heat in the first thermal reservoir 11, it is produced through the first production well 14, and the first production well 14 produces supercritical CO w...

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PUM

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Abstract

The invention relates to an enhanced geothermal and solar combined power generation method and an enhanced geothermal and solar combined power generation system. The method comprises the steps that CO2 serving as a working medium absorbs heat in an enhanced geothermal system, so that the temperature is raised; the enhanced geothermal system outputs supercritical CO2 with different temperatures and certain pressure; part of the supercritical CO2 enters a basic load generation system, and the basic load generation system converts part of the heat absorbed by the supercritical CO2 from the enhanced geothermal system into electric energy serving as a basic load of a power station; the other part of the supercritical CO2 enters a solar generation system, and the solar generation system continuously heats the supercritical CO2 to certain temperature by utilizing solar energy through an energy grade matching method, a heat regeneration series optimization method, an air exhaust compression series optimization method and a heat regenerator flow adjusting method, and then efficiently converts the heat into the electric energy.

Description

technical field [0001] The invention relates to a power generation method and power generation system, in particular to an enhanced geothermal and solar energy combined power generation method and power generation system. Background technique [0002] Enhanced Geothermal Systems (Enhanced Geothermal Systems) or Engineering Geothermal Systems (Engineered Geothermal Systems) are referred to as EGS. The U.S. Department of Energy has given a general definition of enhanced geothermal systems: enhanced geothermal systems are artificial underground water storage heat exchange systems created to extract economical amounts of thermal energy from heat sources with low permeability and / or low porosity . At present, the experiments or demonstration projects of enhanced geothermal system power generation in the United States, Japan, Europe and Australia all use water as the heat carrier. Water is an efficient heat transfer agent, but it is also a strong solvent, especially at high temp...

Claims

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Application Information

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IPC IPC(8): F03G4/00F03G6/04
CPCF03G6/04F03G7/00Y02E10/46
Inventor 姜培学张富珍胥蕊娜欧阳小龙
Owner TSINGHUA UNIV
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