KR20100085416A - Earth heat exchange system for tunnel - Google Patents

Earth heat exchange system for tunnel Download PDF

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Publication number
KR20100085416A
KR20100085416A KR1020090004683A KR20090004683A KR20100085416A KR 20100085416 A KR20100085416 A KR 20100085416A KR 1020090004683 A KR1020090004683 A KR 1020090004683A KR 20090004683 A KR20090004683 A KR 20090004683A KR 20100085416 A KR20100085416 A KR 20100085416A
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KR
South Korea
Prior art keywords
heat
heat exchange
tunnel
exchange pipe
pipe
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KR1020090004683A
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Korean (ko)
Inventor
전성권
허은녕
Original Assignee
서울대학교산학협력단
주식회사 태영건설
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Application filed by 서울대학교산학협력단, 주식회사 태영건설 filed Critical 서울대학교산학협력단
Priority to KR1020090004683A priority Critical patent/KR20100085416A/en
Publication of KR20100085416A publication Critical patent/KR20100085416A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/06—Heat pumps characterised by the source of low potential heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/002—Compression machines, plants or systems with reversible cycle not otherwise provided for geothermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Structures (AREA)

Abstract

A tunnel geothermal exchange system is disclosed. It is buried in the longitudinal direction of the tunnel outside the tunnel, the first heat exchange pipe and the second heat exchange pipe, the heat transfer fluid for heat exchange with geothermal heat, and coupled to one end of the first heat exchange pipe is installed on one side of the tunnel, the heat transfer fluid And a first circulation pump coupled to one end of the second heat exchange pipe, the first circulation pump for pumping the heat transfer fluid heat exchanged in the first heat exchanger to the other end of the second heat exchange pipe, and the other end of the second heat exchange pipe. Coupled to the other side of the tunnel and coupled to the second heat exchanger and the other end of the first heat exchanger pipe in which the pressurized heat transfer fluid is heat-exchanged, and transfers the heat transfer fluid heat-exchanged in the second heat exchanger to one end of the first heat exchanger pipe. Tunnel geothermal heat exchange system including a second circulation pump to build a geothermal system by using the underground of the tunnel outside the unused space to build a geothermal system on a large scale It can be recovered.

Description

Earth heat exchange system for tunnel

The present invention relates to a tunnel geothermal exchange system. More particularly, the present invention relates to a geothermal heat exchange system capable of heat exchange using geothermal heat around a tunnel as a heat source.

Geothermal heat refers to the amount of heat that flows from the inside of the earth to the outside through the surface. The ground temperature varies depending on the terrain, but the temperature in the ground near the surface is approximately 10 to 20 degrees Celsius, which remains constant throughout the year. This geothermal source has the advantage of providing a stable heat source, unlike renewable energy such as solar or wind power.

The heat exchange system using a geothermal source is configured to simultaneously cool and heat ground water, surface water, and ground, which are constant year round, by using a heat sink for cooling and a heat source for heating.

1 and 2 show a geothermal heat exchange system according to the prior art, in which a vertical-loop geothermal heat exchange system and a horizontal-loop geothermal heat exchange are performed according to the arrangement direction of the looped pipes 104a and 104b. Can be divided into systems.

In the vertical geothermal heat exchange system, the roof type pipe 104a is buried in the vertical direction of the ground below the structure 102 such as a house and circulates fluid to exchange heat with the ground. ) And horizontally looped pipe 104b is buried in the ground to circulate the fluid to exchange heat with the ground.

Vertical geothermal heat exchange systems do not occupy a lot of land, so they are used in narrow areas such as single buildings. However, in order to bury the looped pipe 104a in the vertical direction, boring must be carried out to drill the borehole vertically on the ground surface 106, and the U-shaped pipe must be buried in the borehole, thus installing and maintaining the pipe. Difficult to manage

In addition, the horizontal geothermal heat exchange system is used when a large site is secured, and the digging and backfilling cost is lower than the vertical boring cost, and the roof pipe 104b is installed horizontally with the ground surface 106. It has the advantage of being easy, but it should be excavated more than a certain depth in order to effectively utilize geothermal. In addition, in order to effectively utilize the geothermal heat loop type pipe (104b) is installed in the lower groundwater surface it is good to directly exchange heat with the groundwater, but if the depth is low, using the heat of the ground rather than groundwater can be less efficient.

On the other hand, in the case of subways or mountainous areas that are used as public transportation in the city, the tunnel is constructed by excavating or resetting most of the ground. However, in the case of the underground tunnel, there is an advantage of effectively securing geothermal heat.

Since the tunnel is in the form of a long structure extending in one direction, it is advantageous to apply a horizontal geothermal exchange system in that a long and wide site can be secured. A large capacity pump is required for circulation, and if a part of the looped pipe is damaged during use, it is difficult to replace the pump.

The present invention provides a tunnel geothermal exchange system capable of recovering geothermal heat on both sides of a tunnel long in one direction.

In addition, the heat exchange pipe smoothly circulates the heat transfer fluid to facilitate heat exchange with the ground, and to provide a tunnel geothermal heat exchange system that can easily replace the heat exchange pipe in the event of breakage.

According to an aspect of the present invention, the first heat exchange pipe and the second heat exchange pipe which is buried in the longitudinal direction of the tunnel outside the tunnel, the heat transfer fluid for heat exchange with geothermal heat, and one end of the first heat exchange pipe coupled to the tunnel A first circulation pump installed at one side of the first heat exchanger, in which the heat transfer fluid is heat-exchanged, and coupled to one end of the second heat exchange pipe, for transferring the heat transfer fluid heat-exchanged at the first heat exchanger to the other end of the second heat exchange pipe. And a second heat exchanger coupled to the other end of the second heat exchanger pipe and installed at the other side of the tunnel, and coupled to the second heat exchanger and the other end of the first heat exchanger pipe where the pressurized heat transfer fluid exchanges heat. A tunnel geothermal heat exchange system is provided that includes a second circulation pump that pumps to one end of a first heat exchange pipe.

The first heat exchanger may include a first heat pump installed at one side of the tunnel, and the second heat exchanger may include a second heat pump installed at the other side of the tunnel.

The first heat exchange pipe and the second heat exchange pipe may be buried in the lower portion of the groundwater surface formed outside the tunnel.

The first heat exchange pipe and the second heat exchange pipe may be buried under the bottom surface of the tunnel.

The bottom of the tunnel may comprise a rubble layer, and the first heat exchange pipe and the second heat exchange pipe may be embedded in the rubble layer.

The first heat exchange pipe and the second heat exchange pipe may include an inner tube through which the heat transfer fluid moves and an outer tube into which the inner tube is inserted. In this case, a plurality of holes may be formed in the outer tube.

The geothermal system can be recovered on a large scale by constructing a geothermal system using the ground outside the tunnel, which was an unused space.

In addition, the ground heat can be recovered from both sides of the tunnel long in one direction, and the heat transfer fluid can be smoothly circulated through the heat exchange pipe to facilitate heat exchange with the ground.

In addition, the heat exchange pipe can be easily replaced when the heat exchange pipe breaks.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, embodiments of the tunnel geothermal heat exchange system according to the present invention will be described in detail with reference to the accompanying drawings. In the following description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals and Duplicate explanations will be omitted.

Figure 3 is a block diagram showing a tunnel geothermal heat exchange system according to an embodiment of the present invention. Figure 4 is a cross-sectional view of the tunnel to which the tunnel geothermal heat exchange system according to an embodiment of the present invention is applied. And, Figure 5 is a perspective view of a heat exchange pipe of the tunnel geothermal heat exchange system according to an embodiment of the present invention. 3 to 5, the tunnel 12, the first heat exchange pipe 14, the second heat exchange pipe 16, the first heat exchanger 18, the first circulation pump 20, and the second heat exchanger 22, the second circulation pump 24, groundwater surface 26, rubble layer 28, concrete perforated pipe 30, finishing layer 32, inner pipe 34, outer pipe 36, hole ( 38 is shown.

In the tunnel geothermal heat exchange system according to the present embodiment, the first heat exchange pipe 14 and the second heat exchange pipe, which are embedded in the longitudinal direction of the tunnel 12 on the outside of the tunnel 12, to which the heat transfer fluid that exchanges heat with geothermal heat moves. The first heat exchanger 18 coupled to one end of the first heat exchange pipe 14 and installed at one side of the tunnel 12 to exchange heat transfer fluid, and one end of the second heat exchange pipe 16. The first circulation pump 20 coupled to the other end of the second heat exchange pipe 16 for transporting the heat transfer fluid heat exchanged in the first heat exchange unit 18 to the other end of the second heat exchange pipe 16, the tunnel The heat exchange fluid installed on the other side of the heat exchange fluid and heat exchanged in the second heat exchange part 22 and the second heat exchange part 22 and the other end of the first heat exchange pipe 14 are heat exchanged in the second heat exchange part 22. The unused space using the second circulation pump 24 which is pumped to one end of the heat exchange pipe 14 as a component. By establishing the tunnel had 12 geothermal exchange system using an unused ground outside can be recovered in the smelting on a large scale. In addition, the ground heat can be recovered from both sides of the underground structure long in one direction, it is possible to facilitate the heat exchange with the ground by smoothly circulating the heat transfer fluid through the heat exchange pipe.

Tunnel 12 means a passage through the ground for passage through roads, railroads, waterways, etc., means an underground structure that is long in one direction installed in the ground.

In the present embodiment will be described centering on the heat exchange system of the subway tunnel constructed in the city center.

The heat exchange pipes 14 and 16 are buried in the longitudinal direction of the tunnel 12 on the outside of the tunnel 12, and provide a passage through which the heat transfer fluid in which heat is exchanged with the geothermal heat is moved. As the heat exchange pipes 14 and 16, pipes having a high thermal conductivity may be used. For example, polyethylene pipes may be used as the heat exchange pipes 14, 16.

The heat transfer fluid moves in the heat exchange pipes 14 and 16 and heat exchanges with the geothermal heat.

When the geothermal heat exchange system according to the present embodiment is used for cooling and heating, heat and geothermal heat of the heat transfer fluid occurs during cooling, thereby dissipating heat from the heat transfer fluid into the ground, and during heating, the heat transfer fluid absorbs the geothermal heat. As the heat transfer fluid, water or an antifreeze may be used.

The heat exchange pipes 14, 16 are embedded in the longitudinal direction of the tunnel 12 outside of the tunnel 12. In the case of subways or mountainous areas used as public transportation in the city, the tunnel 12 is constructed by excavating or resetting the ground, and in the case of the tunnel 12 which is constructed in the ground over a certain depth, it is possible to effectively secure geothermal heat. There is an advantage.

Since the tunnel 12 is a long underground structure extending in one direction, it is advantageous to apply a horizontal geothermal heat exchange system in that it can secure a long and wide site. However, when the heat exchange pipe is installed horizontally in a long loop type, a large capacity pump is required for circulation of the heat transfer fluid, and when a part of the loop pipe is damaged during use, it is difficult to replace it. Therefore, in the present embodiment, the first and second heat exchange pipes 14 and 16 are respectively installed in the longitudinal direction of the tunnel 12 so that the heat transfer fluid is pumped in the longitudinal direction of the tunnel 12 on both sides of the tunnel 12. do.

When the heat exchange pipe is embedded in a loop shape using a U-shaped pipe, it is difficult to replace the heat exchange pipe when the heat exchange pipe is damaged. Therefore, the heat exchange pipe of the present embodiment is buried in a straight line in the longitudinal direction of the tunnel 12 so that it is easy to replace the heat exchange pipe. You can do that.

In addition, since the tunnel 12 is constructed in the ground more than a predetermined depth, it is possible to easily construct the heat exchange pipes 14 and 16 in the longitudinal direction of the tunnel 12 without additional excavation for the construction of the heat exchange pipes 14 and 16. .

In this embodiment, heat exchange pipes 14 and 16 are buried in the longitudinal direction of the tunnel 12 in a lower portion of the bottom surface of the tunnel 12 so as to smoothly circulate the heat transfer fluid, and easily replace when broken. I did it.

The second heat exchange pipe 16 is buried so that the heat transfer fluid moves to the other side on one side of the tunnel 12, and the first heat exchange pipe 14 is buried so that the heat transfer fluid moves to the one side on the other side of the tunnel 12. The first and second heat exchange pipes 14 and 16 may be provided in plural to increase the heat exchange efficiency between the heat transfer fluid and the geothermal heat.

The heat transfer fluid moving in the second heat exchange pipe 16 is heat exchanged with the geothermal heat while moving from one side of the tunnel 12 to the other side, and the heat transfer fluid heat-exchanged with the geothermal heat is the first heat exchanger at one side of the tunnel 12. The unit 18 provides thermal energy through heat exchange. In addition, the heat transfer fluid moving in the second heat exchange pipe 16 is heat-exchanged with the geothermal heat while moving from one side of the tunnel 12 to the other side, the heat transfer fluid heat-exchanged with the geothermal heat is formed on the other side of the tunnel 12 The heat exchanger 22 provides heat energy through heat exchange.

The first heat exchange pipe 14 and the second heat exchange pipe 16 may be embedded in the lower portion of the groundwater surface 26 formed outside the tunnel 12. Since it is more efficient to exchange heat with groundwater that has geothermal heat than to recover the heat through the soil or rock in the ground, if there is a groundwater level 26 around the tunnel 12, the heat exchange pipes 14 and 16 It is possible to effectively recover the geothermal heat by being buried in the ground below the water surface.

In addition, the first heat exchange pipe 14 and the second heat exchange pipe 16 may be buried under the bottom surface of the tunnel 12. In order to install the heat exchange pipes 14 and 16 on the outer wall of the tunnel 12, installation of a fixture (not shown) for fixing the heat exchange pipes 14 and 16 is required and heat exchange is performed during the construction of the tunnel 12. Although the pipes 14 and 16 may be damaged, when the heat exchange pipes 14 and 16 are installed at the bottom of the tunnel 12, the heat exchange pipes 14 and 16 are disposed in the longitudinal direction of the tunnel 12 and the finishing layer The heat exchange pipes 14 and 16 can be easily provided in the lower part of the bottom surface of the tunnel 12, just to form 32.

Meanwhile, the bottom of the tunnel 12 may include a rubble layer 28, and the first heat exchange pipe 14 and the second heat exchange pipe 16 may be embedded in the rubble layer 28. In general, in the case of constructing the tunnel 12, in preparation for the presence of groundwater around the tunnel 12, a rubble layer 28 capable of draining groundwater at the bottom of the tunnel 12 is installed and concrete in the center of the tunnel 12 By placing the air pipe 30 to discharge the groundwater to the outside of the tunnel 12. In this case, the heat exchange pipes 14 and 16 may be installed to be embedded in the rubble layer 28 to efficiently recover the geothermal heat.

In addition, the first heat exchange pipe 14 and the second heat exchange pipe 16 may include an inner tube 34 through which the heat transfer fluid moves and an outer tube 36 into which the inner tube 34 is inserted. If the heat exchange pipes 14 and 16 are damaged during use or construction, remove the inner tube 34 through which the heat transfer fluid moves and insert a new inner tube 34 into the outer tube 36 to replace the defect. To do that. Meanwhile, as shown in FIG. 5, the outer tube 36 may have a plurality of holes 38 formed therein. When the heat exchange pipes 14 and 16 are buried below the groundwater surface 26 around the tunnel 12, the groundwater flows through the holes 38 of the outer pipe 36 to move the heat transfer fluid to the inner pipe 34. This is to make the heat exchange easily by being in direct contact with the.

In the present embodiment, as shown in FIG. 4, the heat exchange pipe is embedded in the rubble layer 28 with the rubble layer 28 disposed under the bottom surface of the tunnel 12.

The heat exchanger (18, 22) is a place where the heat transfer heat exchanged with geothermal heat flows into the heat exchanger (18, 22), the cold heat energy or hot heat energy obtained through heat exchange with the heat transfer fluid in the heat exchange unit 18, 22 to be used for cooling and heating of the adjacent structure, etc. Can be.

The first heat exchanger 18 is installed at one side of the tunnel 12, and the second heat exchanger 22 is installed at the other side of the tunnel 12. When structures that require air conditioning and the like, such as subway stations, are constructed on one side and the other side of the tunnel 12, the heat energy obtained through heat exchange in the first and second heat exchangers 18 and 22 may be used for heating and cooling of the subway station.

The first heat exchanger 18 is coupled to one end of the first heat exchanger pipe 14 and installed at one side of the tunnel 12. The heat transfer fluid is ground heat and heat exchanged in the process of moving through the first heat exchanger pipe 14. Happening, the heat transfer fluid flowing from one end of the first heat exchange pipe 14 is heat exchanged in the first heat exchange unit 18 and the heat energy obtained through heat exchange in the first heat exchange unit 18 is air-conditioned at one side of the tunnel 12 Or the like.

The second heat exchange part 22 is coupled to the other end of the second heat exchange pipe 16 and installed at the other side of the tunnel 12. The heat transfer fluid undergoes geothermal heat and heat exchange in the process of moving through the second heat exchange pipe 16, and the heat transfer fluid introduced from the other end of the second heat exchange pipe 16 undergoes heat exchange in the second heat exchange part 22, and the second heat exchange fluid flows through the second heat exchange part 22. The heat energy obtained through heat exchange in the heat exchange part 22 may be used for cooling and heating on the other side of the tunnel 12.

Meanwhile, the first heat exchanger 18 includes a first heat pump (not shown) installed at one side of the tunnel 12, and the second heat exchanger 22 is a second installed at the other side of the tunnel 12. It may include a heat pump (not shown). It is also possible to use cold heat energy or hot heat energy obtained from the heat exchangers 18 and 22 as they are, but it is also possible to use a cold heat energy or hot heat energy for cooling and heating by placing a heat pump to increase the efficiency of cooling and heating.

The first heat pump may be installed at one side of the tunnel 12 to perform cooling and heating at one side of the tunnel 12, and the second heat pump may be installed at the other side of the tunnel 12 for cooling and heating at the other side of the tunnel 12. Can be performed. For example, subway stations may be constructed on one side and the other side of the subway tunnel 12, respectively, and the first and second heat pumps may perform heating and cooling of the subway stations respectively installed on both sides of the tunnel 12.

In case of heating and cooling by using geothermal heat, it is possible to obtain higher thermal efficiency than air heat source type heat pump because it uses underground heat with constant temperature without being influenced by outside temperature.

The heat pump is a cooling and heating device that transfers a low temperature heat source to a high temperature or a high temperature heat source to a low temperature by using heat of a refrigerant or heat of condensation.

The circulation pumps 20 and 24 allow the heat transfer fluid to circulate the ground through the heat exchange pipes 14 and 16 so that heat and heat exchange occurs.

The first circulation pump 20 is coupled to one end of the second heat exchange pipe 16 to pump the heat transfer fluid that has undergone heat exchange in the first heat exchange unit 18 to the other end of the second heat exchange pipe 16. A second heat transfer fluid absorbing heat or heat generated by the first heat exchanger 18 is pressurized through the second heat exchange pipe 16 so that heat exchange with the geothermal heat is performed again and is connected to the other end of the second heat exchange pipe 16. To be moved to the heat exchange unit 22. The heat transfer fluid heat-exchanged in the first heat exchange unit 18 by the first circulation pump 20 is pumped to the other end of the second heat exchange pipe 16 and flows in through the other end of the second heat exchange pipe 16. The heat exchange is made in the second heat exchanger (22).

The second circulation pump 24 is coupled to the other end of the first heat exchange pipe 14 to pump the heat transfer fluid that has undergone heat exchange in the second heat exchange unit 22 to one end of the first heat exchange pipe 14. The first heat exchanger 18 connected to one end of the first heat exchanger pipe 14 by performing heat-exchange with geothermal heat while the heat transfer fluid that has undergone heat exchange in the second heat exchanger 22 is pressurized through the first heat exchanger pipe 14. To be moved.

Hereinafter, referring to FIG. 3, the ground heat exchange process is divided into a cooling cycle and a heating cycle when the air conditioning is performed using the tunnel geothermal heat exchange system according to the present embodiment.

First, when the summer cooling cycle is described, the heat transfer fluid discharges heat that the heat transfer fluid has in the ground during heat exchange with the geothermal heat while the heat transfer fluid moves to the first heat exchange pipe 14 by the second circulation pump 24. . Heat is discharged so that the heat transfer fluid with cold heat energy reaches the first heat exchange unit 18 through the first heat exchange pipe 14, and the heat transfer fluid with cold heat energy is heated by the first heat exchange unit 18. Cooling circulating water and heat exchange are used to cool the heat energy. In this process, the heat transfer fluid absorbs heat, and the heat transfer fluid having hot heat energy through heat exchange in the first heat exchange unit 18 moves the second heat exchange pipe 16 by the first circulation pump 20, and thus, During the heat exchange process, the hot heat energy of the heat transfer fluid is discharged to the ground, and the cold heat energy is again obtained. The heat transfer fluid with cold heat energy reaches the second heat exchange part 22 through the second heat exchange pipe 16, and the heat transfer fluid with cold heat energy is heat exchanged in the second heat exchange part 22 to cool the heat energy to the air conditioner. Will be used. The heat transfer fluid having hot thermal energy through heat exchange in the second heat exchanger 22 exchanges heat with geothermal heat while moving the first heat exchange pipe 14 by the second circulation pump 24.

In addition, when the winter heating cycle is described, the heat transfer fluid absorbs the geothermal heat during the heat exchange process with the geothermal heat while the heat transfer fluid moves the first heat exchange pipe 14 by the second circulation pump 24. The heat transfer fluid having the hot heat energy by absorbing the geothermal heat reaches the first heat exchange unit 18 through the first heat exchange pipe 14, and the heat transfer fluid having the hot heat energy passes through the cold air or heating circulation in the first heat exchange unit 18. Heat is exchanged with water to use hot thermal energy for heating. The heat transfer fluid having cold thermal energy through heat exchange in the first heat exchanger 18 absorbs geothermal heat during heat exchange with geothermal heat while moving the second heat exchange pipe 16 by the first circulation pump 20. It has hot heat energy. The heat transfer fluid with hot heat energy reaches the second heat exchange part 22 through the second heat exchange pipe 16, and the heat transfer fluid with hot heat energy undergoes heat exchange in the second heat exchange part 22 to provide hot heat energy to the heating. Will be used. The heat transfer fluid having cold thermal energy through heat exchange in the second heat exchanger 22 exchanges heat with geothermal heat while moving the first heat exchange pipe 14 by the second circulation pump 24.

By repeating the above process, geothermal heat is used for cooling and heating.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 is a view showing a vertical geothermal heat exchange system according to the prior art.

Figure 2 shows a horizontal geothermal heat exchange system according to the prior art.

Figure 3 is a block diagram showing a tunnel geothermal heat exchange system according to an embodiment of the present invention.

Figure 4 is a cross-sectional view of the tunnel to which the tunnel geothermal heat exchange system according to an embodiment of the present invention is applied.

5 is a perspective view of a heat exchange pipe of a tunnel geothermal heat exchange system according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

12: tunnel 14, 16: heat exchange pipe

18, 22: heat exchanger 20, 24: circulation pump

26: groundwater level 28: rubble layer

30: merit pipe 32: finishing layer

34: inner tube 36: outer tube

Claims (7)

A first heat exchange pipe and a second heat exchange pipe buried in the longitudinal direction of the tunnel outside the tunnel and in which a heat transfer fluid that exchanges heat with geothermal heat moves; A first heat exchanger coupled to one end of the first heat exchanger pipe and installed at one side of the tunnel, wherein the heat transfer fluid is heat-exchanged; A first circulation pump coupled to one end of the second heat exchange pipe and configured to pump the heat transfer fluid heat-exchanged in the first heat exchanger to the other end of the second heat exchange pipe; A second heat exchanger coupled to the other end of the second heat exchange pipe and installed at the other side of the tunnel, wherein the transported fluid is heat-exchanged; And And a second circulation pump coupled to the other end of the first heat exchange pipe and for transferring the heat transfer fluid exchanged in the second heat exchange unit to one end of the first heat exchange pipe. The method of claim 1, The first heat exchange part includes a first heat pump installed on one side of the tunnel, And the second heat exchange part includes a second heat pump installed at the other side of the tunnel. The method of claim 1, The first heat exchange pipe and the second heat exchange pipe, Tunnel geothermal heat exchange system, characterized in that the buried in the lower ground water surface formed on the outside of the tunnel. The method of claim 1, The first heat exchange pipe and the second heat exchange pipe, Tunnel geothermal heat exchange system characterized in that the buried in the bottom of the tunnel. The method of claim 1, The bottom of the tunnel includes a rubble layer, And the first heat exchange pipe and the second heat exchange pipe are embedded in the rubble layer. The method of claim 1, The first heat exchange pipe and the second heat exchange pipe, An inner tube through which the heat transfer fluid moves; And Tunnel geothermal heat exchange system characterized in that it comprises an outer tube is inserted into the inner tube. The method according to claim 6, Tunnel geothermal heat exchange system, characterized in that a plurality of holes are formed in the outer tube.
KR1020090004683A 2009-01-20 2009-01-20 Earth heat exchange system for tunnel KR20100085416A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106120854A (en) * 2016-07-04 2016-11-16 中冶东方工程技术有限公司 A kind of underground pipe gallery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106120854A (en) * 2016-07-04 2016-11-16 中冶东方工程技术有限公司 A kind of underground pipe gallery

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