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

Abstract

The invention relates to a composite cold-source hot dry rock thermoelectric power generation system, which comprises an underground thermoelectric power generation module, a negative electrode wire and a positive electrode wire, wherein the underground thermoelectric power generation module is partially located in a hot dry rock reservoir range and partially located in a hot dry rock overlying formation range; the thermoelectric power generation module is provided with a thermoelectric power generation module downhole radiator; electric energy generated by the underground thermoelectric power generation module supplies a ground load through the negative electrode wire and the positive electrode wire; and the underground thermoelectric power generation module, the positive electrode wire, the ground load and the negative electrode wire are sequentially connected to form a closed circuit. Compared with the prior art, the composite cold-source hot dry rock thermoelectric power generation system has the advantages that only a geothermal well of drilling a hot dry rock reservoir is needed; an artificial thermal reservoir does not need to be constructed; on-site power generation of the hot dry rock reservoir is achieved by a thermoelectric module arranged underground; and thermal energy extracted by a cold end of the thermoelectric power generation system in cycle can be applied to heating, cultivation, bathing and the like except for power generation.

Description

technical field [0001] The invention belongs to the field of geothermal power generation, and in particular relates to a composite cold source hot dry rock thermoelectric power generation system and method. 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 is considered to be...

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