阅读说明：本技术 地下换热管凝结热获取和释放方法及装置 (Method and device for acquiring and releasing condensation heat of underground heat exchange tube ) 是由 奉政一 于 2020-06-09 设计创作，主要内容包括：地下换热管凝结热获取和释放方法及装置属于地源热泵领域,具体涉及地下换热管凝结热获取和释放方法及装置。本发明提供的一种大幅度提升取热/储冷能量的地下换热管凝结热获取和释放方法及装置。本发明的地下换热管凝结热获取和释放装置,包括地上换热装置,其特征在于：地上换热装置与地下换热管相连,所述地下换热管内设置有凝固点低于0℃的防冻液或相变制冷剂。(A method and a device for acquiring and releasing condensation heat of an underground heat exchange tube belong to the field of ground source heat pumps, and particularly relate to a method and a device for acquiring and releasing condensation heat of an underground heat exchange tube. The invention provides a method and a device for acquiring and releasing condensation heat of an underground heat exchange tube capable of greatly improving heat/cold storage energy. The invention relates to a device for acquiring and releasing condensation heat of an underground heat exchange tube, which comprises an overground heat exchange device and is characterized in that: the overground heat exchange device is connected with an underground heat exchange tube, and an anti-freezing solution or a phase-change refrigerant with the freezing point lower than 0 ℃ is arranged in the underground heat exchange tube.)

1. Underground heat exchange tube condensation heat obtains and release device, including ground heat transfer device, its characterized in that: the overground heat exchange device is connected with an underground heat exchange tube (1), and an anti-freezing solution or a phase-change refrigerant with the freezing point lower than 0 ℃ is arranged in the underground heat exchange tube (1); soil moisture at the lower part of the ground source hole (3) connected with the heat exchange tube (1) is frozen to release condensation heat as acquired heat, and the frozen soil is used as stored cooling energy in summer.

2. The subterranean heat exchange tube condensation heat harvesting and releasing device of claim 1, wherein: and a section of heat insulation sheath (4) is arranged at the inlet and/or the outlet (2) of the underground heat exchange pipe (1).

3. The subterranean heat exchange tube condensation heat harvesting and releasing device of claim 1, wherein: the ground heat exchange device is an outdoor heat exchanger and is arranged on the ground or a wall.

4. The subterranean heat exchange tube condensation heat harvesting and releasing device of claim 1, wherein: the overground heat exchange device comprises a cooling tower (8) and an indoor heat exchanger (7), an outlet (2) of the underground heat exchange pipe (1) is connected with a circulating pump (6), and an outlet of the circulating pump (6) is respectively connected with inlets of the cooling tower (8) and the indoor heat exchanger (7); outlets of the cooling tower (8) and the indoor heat exchanger (7) are connected with an inlet of the underground heat exchange pipe (1); a cooling valve is arranged at the inlet of the cooling tower, and a control valve is arranged at the inlet of the indoor heat exchanger (7).

5. The subterranean heat exchange tube condensation heat harvesting and releasing device of claim 1, wherein: a refrigerant heat exchange tube (11) is arranged in the same ground source hole (3) of the underground heat exchange tube (1), and the refrigerant heat exchange tube (11) is connected with an outdoor heat exchanger (10) on the ground; a circulating pump (6) is arranged between the underground heat exchange pipe (1) and the ground heat exchange device.

6. The subterranean heat exchange tube condensation heat harvesting and releasing device of claim 1, wherein: the overground heat exchange device comprises a circulating pump (6) connected with the underground heat exchange pipe (1), and an outlet of the circulating pump (6) is connected with the outdoor heat exchanger (10) through a pipeline; the pipeline passes through a compressor unit (13) and a plate heat exchanger (12) respectively, a port on one side of the compressor unit (13) is connected with one end of an indoor heat exchanger (7), the other end of the indoor heat exchanger (7) is connected with one end of the plate heat exchanger (12) and one end of a heat exchange device pump (14) at the same time, the other end of the plate heat exchanger (12) is also connected with the heat exchange device pump (14), and the other end of the heat exchange device pump (14) is connected with a port on the other side of the compressor unit (13); a control valve (5) is arranged between the indoor heat exchange device (7) and the heat exchange device pump (14); and a cooling valve (9) is arranged between the plate heat exchanger (12) and the heat exchange device pump (14).

7. The subterranean heat exchange tube condensation heat harvesting and releasing device of claim 1, wherein: be provided with ground source refrigerant heat exchange tube (11) in ground source hole (3), the upper port of plate heat exchanger (12) is connected through first check valve (16) to the trachea of refrigerant heat exchange tube (11), plate heat exchanger (12) lower port passes through second check valve (15), series connection outdoor heat exchanger (10), the liquid pipe of refrigerant heat exchange tube (11) is connected in outdoor heat exchanger (10), compressor (17) import is connected to plate heat exchanger (12) opposite side upper port, compressor (17) exit linkage indoor heat exchanger (7), plate heat exchanger (12) opposite side lower port is connected through cooling valve (9) to indoor heat exchanger (7) other port, at compressor (17) two end parallel control valve (5), refrigerant heat exchange tube (11) and outdoor heat exchanger (10), fill carbon dioxide liquid or refrigerant according to the volume.

8. The subterranean heat exchange tube condensation heat harvesting and releasing device of claim 1, wherein: a refrigerant heat exchange tube (11) is arranged in the ground source hole (3), an air tube of the refrigerant heat exchange tube (11) is connected with an inlet of the indoor heat exchanger (7) through a first one-way valve (16), an outlet of the indoor heat exchanger (7) is connected with a liquid tube of the refrigerant heat exchange tube (11) through a throttle valve (18) in series connection with the outdoor heat exchanger (10), two ends of the first one-way valve (16) are connected with a compressor (17) in parallel, and the refrigerant heat exchange tube (11) and the outdoor heat exchanger (10) are filled with carbon dioxide liquid or refrigerant according.

9. The subterranean heat exchange tube condensation heat harvesting and releasing device of claim 1, wherein: a refrigerant heat exchange tube (11) is arranged in the ground source hole, a branch tube on the left side of the refrigerant heat exchange tube (11) is connected with a liquid storage tank (19) and an inlet of a first check valve (16) through the first check valve (16), an outlet of a second check valve (15) is connected with a port on one side of the outdoor heat exchanger (10), and a port on the other side of the outdoor heat exchanger (10) is connected with a branch tube on the right side of the refrigerant heat exchange tube (11).

10. A heat acquisition and release method using the apparatus for acquiring and releasing condensation heat of an underground heat exchange pipe according to any one of claims 1 to 9, characterized in that: when the temperature on the ground is lower than 0 ℃, the antifreeze or the phase-change refrigerant in the underground heat exchange tube (1) dissipates heat in the above-ground heat exchange device, the above-ground heat exchange device controls the circulation of the antifreeze or the phase-change refrigerant, and when the temperature of the antifreeze or the phase-change refrigerant is lower than 0 ℃, the antifreeze or the phase-change refrigerant in the underground heat exchange tube (1) can enable the underground to form frozen soil; when the temperature on the ground is high, the underground heat exchange tube (1) is matched with the ground heat exchange device to release the cold energy stored in the frozen soil to the ground.

Technical Field

The invention belongs to the field of ground source heat pumps, and particularly relates to a method and a device for acquiring and releasing condensation heat of an underground heat exchange tube.

Background

The traditional ground source heat pump adopts a water pipe for heat exchange, in order to prevent freezing and frost damage, the lowest heat exchange water temperature is 3 ℃, even if antifreeze liquid circulation is adopted, various technical standards still calculate heat energy by cooling soil to 4-5 ℃, and the 100-meter deep hole heat-taking heating/refrigerating building area is 50-60 m²，10000m²The building needs to be drilled with 200 ground source holes, the cost is high, the land around the urban building almost has no position capable of drilling such multiple holes, the market proportion of the ground source heat pump is less than 5% of that of the air-cooled heat pump, no matter which heat pump is adopted, heat extraction and power consumption of a compressor in summer are large, a power system without refrigeration equipment at present completely depends on pump circulation, sunlight heat energy is not utilized, and rooms are not providedThe cooling and heating equipment with internal and external temperature difference circulation does not have equipment with a single pipeline capable of transferring cold and heat, and is difficult to apply in agriculture because the cooling energy density obtained by the existing heat pump soil heat taking is small, and the power consumption and the equipment cost are higher.

At present, in outdoor stadiums, high-speed railway stations, bus stations and other places, a method and a device for automatically heating and storing cold in winter and automatically cooling in summer are not provided, and a natural working medium carbon dioxide is used for realizing the thousand-year dream of human beings.

Disclosure of Invention

The invention aims at the problems and provides a method and a device for acquiring and releasing the condensation heat of an underground heat exchange tube capable of greatly improving heat/cold storage energy.

In order to achieve the above purpose, the invention adopts the following technical scheme that the device for acquiring and releasing the condensation heat of the underground heat exchange tube comprises an overground heat exchange device, and is characterized in that: the overground heat exchange device is connected with an underground heat exchange tube, and an anti-freezing solution or a phase-change refrigerant with the freezing point lower than 0 ℃ is arranged in the underground heat exchange tube.

As a preferable scheme of the invention, the inlet and/or the outlet of the underground heat exchange pipe is/are provided with a heat insulation sheath.

The invention relates to a method for acquiring and releasing condensation heat of an underground heat exchange tube by using the device, which is characterized in that: when the temperature on the ground is lower than 0 ℃, the antifreeze or the phase-change refrigerant in the underground heat exchange tube dissipates heat in the ground heat exchange device, the ground heat exchange device controls the circulation of the antifreeze, and when the temperature on the antifreeze is lower than 0 ℃, the antifreeze or the refrigerant in the underground heat exchange tube can enable the underground to form frozen soil; when the temperature on the ground is high, the underground heat exchange tubes are matched with the ground heat exchange device to release the cold energy stored in the frozen soil to the ground.

The invention has the beneficial effects that: 1. the invention is based on: specific heat of water: 4.2j/g, heat of condensation released by freezing of water: 366j/g, the underground soil temperature is reduced to be below 0 ℃, freezing is carried out to release water condensation heat in the soil, the heat released by the soil water in one ground source hole is 80 times of the heat exchange energy of the traditional ground source at the temperature of 3-5 ℃, so that the construction cost is reduced by several times, and the problems of insufficient low-temperature heat and low energy efficiency of an air-cooled air conditioner are solved.

2. Compared with the traditional water cooling type, the number of the ground source holes is reduced by 5-8 times, the occupied area is greatly reduced, the local heat exchanger can be applied to urban dense building groups, the melting, cooling and erosion of high-density energy storage frozen soil are less, the cooling power cost is reduced by more than 95% in summer, and the method has important significance on the sustainable development of human beings.

3. The overground heat exchange device is suitable for the reconstruction of various old cooling towers and air-cooled heat exchange air conditioners besides the new construction, does not use a compressor with huge power consumption, utilizes severe cold in winter for heat dissipation, improves the heat dissipation capacity of the heat exchanger by multiple times compared with heat dissipation in summer, and is more reliable in system, simpler in maintenance and greatly reduced in cost.

4. The overground heat exchange device can adopt various isolation devices such as a heat exchange micro-pipe, a sleeve heat exchanger and a plate heat exchanger indoors, then transfers heat through a water circulation geothermal pipe or a fan coil, adopts a solar panel as an external heat exchanger, has a scientific and ingenious structure, realizes heating and cooling without cost for buildings, and is also suitable for agricultural application.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.

Fig. 4 is a schematic structural diagram of embodiment 4 of the present invention.

Fig. 5 is a schematic structural diagram of embodiment 5 of the present invention.

Fig. 6 is a schematic structural diagram of embodiment 6 of the present invention.

In the figure, 1 is an underground heat exchange pipe, 2 is an outlet, 3 is a ground source hole, 4 is a heat insulation sheath, 5 is a control valve, 6 is a circulating pump, 7 is an indoor heat exchanger, 8 is a cooling tower, 9 is a cooling valve, 10 is an outdoor heat exchanger, 11 is a refrigerant heat exchange pipe, 12 is a plate heat exchanger, 13 is a compressor unit, 14 is a heat exchange device pump, 15 is a second one-way valve, 16 is a first one-way valve, 17 is a compressor, 18 is a throttle valve, 19 is a liquid storage tank, and 20 is a heat insulation layer.

Detailed Description

The invention relates to a device for acquiring and releasing condensation heat of an underground heat exchange tube, which comprises an overground heat exchange device and is characterized in that: the overground heat exchange device is connected with an underground heat exchange tube 1, and an anti-freezing solution or a phase-change refrigerant with the freezing point lower than 0 ℃ is arranged in the underground heat exchange tube 1.

As a preferable scheme of the invention, a section of heat insulation sheath 4 is arranged at the inlet and/or the outlet 2 of the underground heat exchange pipe 1.

In another preferred embodiment of the present invention, the above-ground heat exchange device is an outdoor heat exchanger and is installed on the ground or on a wall.