Middle-deep layer closed geothermal energy heat supply system and design method thereof

Abstract

The invention discloses a middle-deep layer closed geothermal energy heat supply system which comprises a boiling gas heat exchanger module used for feeding a heat exchange medium into the ground andguiding and inputting the heat exchange medium into the input end of an underground heat exchanger module after underground heat exchange, an underground heat exchanger module and a generator set; theunderground heat exchanger module is used for carrying out secondary heat exchange on the heat exchange medium subjected to heat exchange and circulating water, pumping the circulating water to a single-pipe circulating pipe network and conveying the circulating water to a multi-stage user side step by step through the single-pipe circulating pipe network, and the single-pipe circulating pipe network inputs return water formed after the circulating water is used by the multi-stage user side into the underground heat exchanger module; the generator set is used for being connected into the single-pipe circulating pipe network in a mode of being connected with the multi-stage user side in parallel, separating the heat exchange medium pumped into the generator set by the underground heat exchanger module from the circulating water function, feeding the heat exchange medium generated after separation into the input end of the boiling gas heat exchanger module, and conveying the circulatingwater generated after separation to the single-pipe circulating pipe network; and underground indirect multi-medium combined heat exchange is adopted, the terrestrial heat use efficiency is improved,and system water supply is stable.

Description

technical field [0001] The invention relates to the technical field of geothermal energy heating, in particular to a medium-deep closed geothermal energy heating system and a design method thereof. Background technique [0002] The research and development of key technologies for mid-to-deep geothermal energy heating has become a research hotspot in some scientific research institutes in my country. Coupled with the policy support of the state and relevant provinces and cities, the future development prospects are very broad. At present, some commercial buildings and residential buildings in Shaanxi, Hebei, Shanxi, Henan and other places have adopted medium-deep geothermal energy heating technology to achieve winter heating, and this technology is still blank in Yanwei area. Due to the disadvantages of initial investment and adjustment performance, as well as the dependence on geological conditions and the uncertainty of the impact on the surrounding environment, the utiliza...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a medium-deep closed geothermal energy heating system and its design method to solve the problem that the existing medium-deep geothermal energy development is subject to geographical restrictions and ecological restrictions

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