Middle-deep geothermal heat energy conversion device used in winter and summer

Abstract

The invention discloses a winter and summer dual-purpose medium-deep geothermal heat energy conversion device which comprises an outer pipe and an inner pipe, the lower end of the inner pipe is communicated with the outer pipe, the axis of the outer pipe and the axis of the inner pipe are located on the same straight line, a flange plate is arranged at the upper end of the outer pipe, embedded concrete is arranged below the flange plate, and the embedded concrete is poured on the ground. The outer pipe penetrates through embedded concrete and extends into the ground, an input pipe is installed at the upper end of the outer pipe, an output pipe is installed at the upper end of the inner pipe, circulating heat conduction mechanisms are arranged at the two ends of the outer pipe, and a circulating switching mechanism is arranged on one side of the outer pipe. The geothermal well has the beneficial effects that the circulation depth of a medium can be changed according to the actual environment requirement through the effect of the circulation switching mechanism, the geothermal well is prevented from being in an idle state, the utilization rate of the geothermal well is increased, and a certain blocking effect can be achieved on the medium in the shallow layer and the medium in the deep layer; through the effect of the circulating heat conduction mechanism, the internally-circulating heat conduction fluid can be inserted between the stratum and the outer pipe in a reciprocating mode, and the heat exchange rate is increased.

Description

technical field [0001] The invention relates to the technical field of mid-deep geothermal application technology, and more specifically relates to a mid-deep geothermal thermal energy conversion device for both winter and summer. Background technique [0002] Middle-deep geothermal heat is renewable heat energy from the shallow surface or depth of the earth. It originates from the decay of the earth's molten magma and radioactive substances. The deeper the formation, the higher the temperature. The temperature range is 25-150 ° C. The heat should be extracted according to the actual Depending on the temperature of the water, different application technologies should be selected, mainly direct use of geothermal water for heating and ground source heat pump technology. Most of them use the heat in the deep underground to supply heat to the surface through the circulation of the medium. However, when the surface temperature is high, the heat in the deep underground is not need...

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Problems solved by technology

[0002] Middle-deep geothermal heat is renewable heat energy from the shallow surface or depth of the earth. It originates from the decay of the earth's molten magma and radioactive substances. The deeper the formation, the higher the temperature. The temperature range is 25-150 ° C. The heat should be extracted according to the actual Depending on the temperature of the water, different application technologies should be selected, mainly direct use of geothermal water for heating and ground source heat pump technology. Most of them use the heat in the deep underground to supply heat to the surface through the circulation of the medium. However, when the surface temperature is high, the heat in the deep underground is not needed at this time, and the geothermal well is in an idle state at this time, and the energy utilization rate is low;

[0003] Existing geothermal extraction devices, for example, the patent number is CN202021562662.5, and the patent name is a patent for a geothermal coupling heat exchange system for the shallow layer and the mid-deep layer of the same well. This patent adds a set of spiral heating on the basis of the original geothermal energy heating. Type heat exchanger, which is equivalent to setting up two sets of heat exchangers, which greatly increases the cost of use; and when working, the heat of deep geothermal heat will be transferred to one side of the spiral heat exchanger through the medium, resulting in the mutual influence of cooling and heating. low work efficiency

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