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Formation cold source-type hot dry rock thermoelectric power generation system and method

A technology of thermoelectric power generation and self-cooling source, applied in the direction of generator/motor, electrical components, etc., can solve the problems of high construction cost and operation cost

Active Publication Date: 2016-11-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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The technology is expensive to build and run

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  • Formation cold source-type hot dry rock thermoelectric power generation system and method
  • Formation cold source-type hot dry rock thermoelectric power generation system and method
  • Formation cold source-type hot dry rock thermoelectric power generation system and method

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Embodiment Construction

[0018] Such as figure 1 As shown, the hot dry rock reservoir 10 is a high-temperature rock mass with a buried depth of several thousand meters, a temperature greater than 200°C, and no fluid inside or only a small amount of underground fluid; From layer 10 to the surface covered by sedimentary rock or soil, the temperature of the formation gradually decreases from bottom to top, which is lower than the temperature of dry hot rock reservoir; wellbore 8 is a hole structure drilled through the formation, passing through The hot dry rock overlying formation 11 and the hot dry rock reservoir 10; the wellbore 8 part within the range of the hot dry rock overlying formation 11 is completed by casing cementing, and the wellbore 8 part within the range of the hot dry rock reservoir 10 is completed with open hole Completion way complete. The shaft 8 provides access for the downhole thermoelectric power generation module 33 , the negative lead wire 61 and the positive lead wire 62 .

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Abstract

The invention relates to a formation cold source-type hot dry rock thermoelectric power generation system, which comprises an underground thermoelectric power generation module, a negative lead and a positive lead, wherein one part of the underground thermoelectric power generation module is in a hot dry rock reservoir range and one part of the underground thermoelectric power generation module is in a hot dry rock overlying formation range; the part of the underground thermoelectric power generation module in the hot dry rock overlying formation range is in direct contact with a shaft part finished in a casing cementing manner to form a low-temperature cold end for formation cold source-type hot dry rock thermoelectric power generation; electric energy generated by the underground thermoelectric power generation module is supplied to a ground load through the positive lead and the negative lead; and the underground thermoelectric power generation module, the positive lead, the ground load and the negative lead are sequentially connected to form a closed circuit. Only one geothermal well for drilling a hot dry rock reservoir is needed; an artificial reservoir does not need to be constructed; on-site power generation of the hot dry rock reservoir is achieved through a thermoelectric module arranged underground; and heat energy extracted by the cold end of the thermoelectric power generation system in cycle can be applied to heating, farming, bathing and the like.

Description

technical field [0001] The present invention relates to the field of geothermal power generation, in particular to a system and method for thermoelectric power generation of hot dry rock with self-cooling source of formation. technical background [0002] Geothermal energy is a huge natural resource stored in the interior of the earth. It has large reserves and is clean and pollution-free. It has long been concerned by countries all over the world. The development and utilization of geothermal resources can achieve energy saving, emission reduction, and environmental protection, and is considered to be an effective means to solve smog. At present, hot water and steam geothermal resources are mainly developed and utilized, which are often used in heating, breeding and power generation. In contrast, the development of hot dry rock has just emerged, but its reserves are much higher than the hot water and steam geothermal resources that have been widely used. Power generation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N11/00
CPCH02N11/002
Inventor 刘均荣杜鹏李博宇史伟新曹世杰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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