Simple heating system capable of efficiently and cleanly utilizing geothermal energy

Abstract

The invention discloses a simple heat removal system capable of efficiently and cleanly utilizing geothermal heat energy, and solves the problems of huge equipment, high construction cost and easinessin underground water pollution in the existing geothermal heat removal. A total thought of taking heat without taking water is adopted, a traditional mode of extracting underground hot water is abandoned, a heat exchanger for exchanging heat between supercritical CO2 and hot water is arranged in an underground hot well, heat energy of the underground hot water is directly exchanged into a supercritical CO2 working medium underground, the obtained supercritical CO2 working medium is pumped to the ground for power generation or heat exchange through a supercritical CO2 circulating pump, the supercritical CO2 after acting is sent back to the underground heat exchanger to obtain heat energy again, and the process is repeated, so that efficient utilization of the underground heat energy is achieved; and in the whole process, underground hot water does not need to be pumped to the ground and isolated from a heat exchange medium, so that clean utilization is achieved, and the ground surfacestructure is protected.

Description

technical field [0001] The invention relates to a geothermal energy utilization system, in particular to a simple and fast heat extraction system and a heat extraction method that can cleanly utilize geothermal energy with high efficiency. Background technique [0002] Supercritical CO 2 The circulatory system (Supercritical Carbon Dioxide Cycle) is a system that utilizes supercritical CO 2 As a working fluid power generation system, the system uses CO in a supercritical pressure state 2 As a circulating working fluid, heat is absorbed in the heat exchanger, and then converted into supercritical CO 2 , entering the turbine to expand and do work, thereby driving the generator to generate electricity, and completing the work of supercritical CO 2 , return to the heat exchanger to absorb heat through the cooler and circulating pump, and then enter the turbine to expand and do work, so that the power generation task is completed; supercritical CO 2 The heat exchanger in the ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a simple and efficient heat extraction system for efficient and clean use of geothermal heat energy, which solves the technical problems of existing geothermal heat extraction with huge equipment, high construction costs, and groundwater pollution.

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