KR101088440B1 - Earth heat exchange pipe, earth heat exchange system and manufacturing method of the same - Google Patents

Abstract

A geothermal heat exchange pipe, a geothermal heat exchange system, and a construction method thereof are disclosed. A geothermal heat exchange pipe buried in the ground and the heat transfer fluid for heat exchange with the geothermal heat is moved, including a hole tube formed with a plurality of holes through which groundwater flows, and a heat exchange tube inserted into the hole tube, the heat transfer fluid is moved, Geothermal heat can be easily obtained in the ground where the groundwater level exists, and the heat exchange pipe can be easily replaced when the heat exchanger tube is broken.

Geothermal heat, heat exchange, air conditioning, underground space, perforated pipe, heat exchange pipe, circulation pump

Description

Geothermal exchange pipe, geothermal exchange system and construction method {Earth heat exchange pipe, earth heat exchange system and manufacturing method of the same}

The present invention relates to a geothermal heat exchange pipe, a geothermal heat exchange system and a construction method thereof. More specifically, the present invention relates to a geothermal heat exchange pipe that is easy to heat exchange with geothermal heat in the ground where an underground water level exists, and a geothermal heat exchange system constructed between underground spaces and a construction method thereof.

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, underground underground areas such as subways used for public transportation, underground parking lots and distribution lines of buildings, cable broadcasting cables, water pipes, hot water pipes for heating and maintenance areas for their maintenance are installed. . These underground spaces are constructed in the ground of several meters to several tens of meters deep from the ground surface, which has the advantage of effectively securing geothermal heat.

Since these underground spaces have already been constructed at a depth that is easy to secure geothermal heat, it is advantageous to apply a horizontal geothermal heat exchange system rather than a vertical geothermal heat exchange system to secure geothermal heat. There is a problem that construction methods such as digging and backfilling cannot be applied to embed a geothermal heat exchange pipe like a system.

The present invention provides a geothermal heat exchange pipe that can easily secure geothermal heat in the ground where the groundwater level exists.

In addition, the present invention is to provide a geothermal heat exchange system and a construction method that can ensure geothermal heat by embedding the geothermal heat exchange pipe in the through hole by drilling through-holes through the previously constructed underground space.

According to an aspect of the present invention, a pipe which is buried in the ground, the heat transfer fluid for heat exchange with the geothermal heat is moved, the hole is formed with a plurality of holes through which the groundwater flows, and the heat exchanger is inserted into the oil hole, the heat transfer fluid is moved There is provided a geothermal heat exchange pipe comprising a pipe.

The heat exchanger tube may be inserted into a plurality of perforated tubes, and in this case, the heat exchanger tube may further include a gap maintaining material for maintaining a gap of the plurality of heat exchanger tubes.

The heat exchange tube may include an inner tube into 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.

In addition, according to another aspect of the invention, the through-hole penetrating through the wall of the other underground space in the wall of one underground space, the hole is inserted into the through hole, the hole is formed in a plurality of holes through which the groundwater flows, and inserted into the hole The present invention provides a geothermal heat exchange system including a heat exchange tube through which a heat transfer fluid for heat exchange with geothermal heat moves, a circulation pump for pumping heat transfer fluid along a heat exchange tube, and a heat exchanger coupled to the heat exchange tube to heat exchange the heat transfer fluid.

The heat exchange tube may be inserted into a plurality, and may further include a gap maintaining material for maintaining a gap of the plurality of heat exchange tubes.

The heat exchange tube may include an inner tube into 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.

In addition, according to another aspect of the present invention, the through-hole penetrating through the wall of the other underground space in the wall of one underground space, the through-hole pipe is formed in the through-hole and the ground water flows into the through-hole, and inserted into the hole And a first heat exchanger tube and a second heat exchanger tube to which the heat transfer fluid for heat exchange with geothermal heat moves, a first heat exchanger coupled to one end of the first heat exchanger tube, and a heat exchange fluid is heat exchanged, and one end of the second heat exchanger tube, And a first circulation pump for pumping the heat transfer fluid heat-exchanged in the first heat exchanger to the other end of the second heat exchanger tube, and a second heat exchanger unit coupled to the other end of the second heat exchanger tube, and the pressurized heat transfer fluid is heat-exchanged. A geothermal heat exchange system is provided that includes a second circulation pump coupled to the other end of the heat exchanger tube and transferring the heat transfer fluid heat-exchanged in the second heat exchanger to one end of the first heat exchanger tube.

Meanwhile, the through hole may include a first through hole and a second through hole, and the perforated pipe may include a first perforated pipe and a second perforated pipe inserted into the first through and the second through holes, respectively. The heat exchange tube and the second heat exchange tube may be inserted into the first and second hole tubes, respectively.

The first heat exchanger tube and the second heat exchanger tube may be inserted in plural numbers, and in this case, the first heat exchanger tube and the second heat exchanger tube may further include a gap maintaining material that maintains a gap between the plurality of first heat exchanger tube and the second heat exchanger tube.

Each of the first heat exchange tube and the second heat exchange tube 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.

In addition, according to another aspect of the present invention, by using a geothermal heat exchange pipe including a heat pipe which is formed in the lengthwise direction in the hole and the hole is formed in the hole and a plurality of holes through which groundwater flows, the heat transfer fluid for heat exchange with geothermal heat A method of constructing a geothermal heat exchange system, comprising: drilling a through hole penetrating a wall of one underground space from a wall of another underground space, and inserting a geothermal heat exchange pipe into the through hole. This is provided.

The punching step may be performed by a tunnel boring machine (TBM).

The heat exchange tube may be inserted into a plurality of holes in the hole, and may further include a gap maintaining material for maintaining a gap of the plurality of heat exchange tubes.

The heat exchange tube may include an inner tube into 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.

Geothermal heat can be easily obtained in the ground where the groundwater level exists, and the heat exchange pipe can be easily replaced when the heat exchanger tube is broken.

In addition, it is possible to recover geothermal heat on a large scale by building a geothermal heat exchange system using an underground space that was not used.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed 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, when 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 a geothermal heat exchange pipe, a geothermal heat exchange system, and a construction method thereof 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 the same drawings. The numbering and duplicate description thereof will be omitted.

3 is a perspective view of a geothermal heat exchange pipe according to a first embodiment of the present invention, FIG. 4 is a cross-sectional view of a geothermal heat exchange pipe according to a first embodiment of the present invention, and FIG. 5 is a first embodiment of the present invention. It is a figure which shows the space keeping material of a geothermal heat exchange pipe. 6 is a perspective view of a heat exchange tube of a geothermal heat exchange pipe according to a first embodiment of the present invention. 3 to 6, the geothermal heat exchange pipe 11, the hole tube 12, the holes 12c, 14c, the heat exchange tube 14, the inner tube 14a, the outer tube 14b, the spacer ( 16, a holding ring 16a and a protrusion 16b are shown.

The geothermal heat exchange pipe 11 according to the present embodiment is a pipe in which a heat transfer fluid, which is buried in the ground and heat-exchanges with geothermal heat, is moved, and includes a hole 12 and a hole 12c having a plurality of holes 12c into which groundwater flows. 12) is inserted in the longitudinal direction, including a heat exchange tube 14, the heat transfer fluid is moved, it is possible to easily secure the geothermal heat in the ground where the groundwater level.

The hole 12 has a plurality of holes 12c formed on the surface thereof, and when there is an underground water level in the ground, groundwater flows through the hole 12c of the hole 12. In heat exchange between geothermal and heat transfer fluid, it is more efficient to heat exchange directly with groundwater having geothermal heat than heat exchange with geothermal heat through underground soil or rock. Therefore, the heat transfer fluid in heat exchange pipe 14 installed in oil pipe 12 is ground water. In order to exchange heat directly with the hole 12 to form a plurality of holes (12c) on the surface of the ground water to be introduced into the hole 12.

Since the perforated pipe 12 is embedded in the ground and used semi-permanently, a pipe made of durable material may be used to prevent damage during use. For example, concrete, polymer compounds, steel pipes and the like can be used.

The heat exchange tube 14 is inserted into the hole tube 12 and provides a passage through which the heat transfer fluid moves. A pipe made of a material having high thermal conductivity may be used so that the heat exchange with the groundwater introduced through the hole 12 may be efficiently performed. For example, polyethylene pipes can be used. In addition, a tube of a material that is obvious to those skilled in the art having high thermal conductivity may be used as the heat exchange tube 14.

Since the heat exchange tube 14 is inserted into the perforated tube 12, it can be easily replaced when damage occurs during construction or use.

The heat transfer fluid moves in the heat exchange tube 14 and heat exchanges with the geothermal heat. For example, when the geothermal heat exchange pipe 11 according to the present embodiment is used for cooling and heating, the heat and geothermal heat of the heat transfer fluid occurs during heat cooling, so that the heat of the heat transfer fluid is discharged to the ground, and the heat is transferred to the ground during heating. The fluid will absorb. As the heat transfer fluid, water or an antifreeze may be used.

The heat exchange tube 14 may be inserted into a plurality of air hole 12. In order to increase the heat exchange efficiency between the heat transfer fluid moving in the heat exchange tube 14 and the geothermal heat, a plurality of heat exchange tubes 14 may be disposed in the oil hole tube 12.

When the plurality of heat exchange tubes 14 are disposed in the hole tube 12, the gap maintaining material 16 may be further provided to maintain the gap of the plurality of hole tubes 12. As shown in FIG. 5, the spacer 16 protrudes from a plurality of fixing rings 16a into which a plurality of heat exchange tubes 14 are inserted, and a fixing ring 16a of the outside, respectively, and has an inner wall of the perforated tube 12. It may include a protrusion (16b) to be coupled. The gap retaining material 16 may be disposed in plural at regular intervals in the longitudinal direction of the perforated tube 12.

The heat exchange tube 14 may include an inner tube 14a through which the heat transfer fluid moves and an outer tube 14b into which the inner tube 14a is inserted. If the heat exchanger tube 14 is damaged during use or construction, remove the inner tube 14a through which the heat transfer fluid moves, insert a new inner tube 14a into the outer tube 14b, and replace the inner tube 14a. will be. Meanwhile, as shown in FIG. 6, the outer tube 14b may have a plurality of holes 14c formed therein. When the geothermal heat exchange pipe 11 is buried below the groundwater level, the groundwater flows in through the holes 12c of the perforated pipe 12, and again flows through the holes 14c of the outer pipe 14b to transfer the heat transfer fluid. This is to facilitate direct heat exchange by making direct contact with the inner tube 14a.

In this embodiment, the outer tube 14b is inserted into the fixing ring 16a of the spacer 16, and the inner tube 14a is inserted into the outer tube 14b.

 7 is a configuration diagram showing a geothermal heat exchange system according to a second embodiment of the present invention. Referring to FIG. 7, the oil hole tube 12, the heat exchange tube 14, the wall 18, the through hole 20, the circulation pump 22, and the heat exchange unit 24 are illustrated.

In the geothermal heat exchange system according to the present embodiment, a through hole 20 penetrating through a wall 18 of one underground space and a wall 18 of another underground space is inserted into the through hole 20, and groundwater is introduced. A circulating pump for circulating the heat transfer fluid along the heat exchange pipe 14 and the heat exchange tube 14 inserted into the hole hole 12, the heat transfer pipe circulating through the heat transfer fluid for heat exchange with geothermal heat, 22, and a heat exchanger 24 coupled to the heat exchanger tube 14 for heat exchange of the circulating heat transfer fluid, can be used to recover geothermal heat on a large scale by constructing a geothermal heat exchange system using an underground space that has not been used. have.

In the underground of the city, underground common areas such as subway used for public transportation, underground parking lots and distribution lines of buildings, cable broadcasting cable, water pipes, hot water pipes for heating, and maintenance areas for their maintenance are installed. These underground spaces are constructed in the ground of several meters to several tens of meters deep from the ground surface, which has the advantage of effectively securing geothermal heat.

Since these underground spaces are already formed at a depth that is easy to secure geothermal heat, the through holes 20 penetrate the two underground spaces, and the pipes through which the heat-transfer fluid is circulated in the through holes 20 are buried in the unused spaces of the underground. It is possible to build a geothermal heat exchange system at low cost.

The through hole 20 penetrates the wall 18 of another underground space from the wall 18 of one underground space. Underground space refers to underground spaces already constructed underground such as subway tunnels, underground common areas, underground parking lots. The through hole 20 passing through the underground space may be drilled by a tunnel propulsion method known to those skilled in the art, such as a tunnel boring machine (TBM) method, a steel pipe propulsion method, a NATM (New Austrian Tunneling Method) method.

The hole tube 12 is inserted into the through hole 20 and a plurality of holes into which groundwater flows is formed. The hole 12 may be inserted at the same time as the through-hole 20 puncture to serve as the support.

In use, a plurality of holes are formed on the surface of the perforated pipe 12 so that groundwater flows into the perforated pipe 12 through the hole of the perforated pipe 12 when there is a groundwater level in the ground.

The heat exchange tube 14 is inserted into the oil hole tube 12, and provides a passage through which the heat transfer fluid moves. As illustrated in FIG. 7, the heat exchange tube 14 is inserted into and installed in the space formed by the through hole 20 so that the heat transfer fluid that exchanges heat with geothermal heat can be circulated (see arrows in FIG. 7).

The air hole pipe is inserted into the through-hole 20 by inserting a geothermal heat exchange pipe 14 including a heat pipe 14 and a heat pipe 14 through which the heat-transfer fluid is moved. 12) and the heat exchanger tube 14 can be installed simultaneously. In this case, the U-shaped tube may be coupled to the ends of the pair of heat exchange tubes 14 to allow the heat transfer fluid to circulate in the heat exchange tubes 14.

The circulation pump 22 circulates the heat transfer fluid along the heat exchange tube 14, and heat exchange with geothermal heat occurs through the circulation of the heat transfer fluid.

The heat exchange part 24 is a place where heat transfer heat exchanged with geothermal heat is introduced while circulating along the heat exchange tube 14, and heat exchange is performed. The cold heat energy or hot heat energy obtained through heat exchange with the heat transfer fluid in the heat exchange part 24 is adjacent to each other. It can be used for heating and cooling of the structure.

The heat exchanger 24 may include a heat pump (not shown), and may heat and cool adjacent structures. It is also possible to use cold heat energy or hot heat energy obtained from the heat exchanger 24 as it is, 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 heating and cooling.

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.

Hereinafter, when cooling and heating using the geothermal heat exchange system according to the present embodiment will be described by dividing the geothermal heat exchange process into a cooling cycle and a heating cycle.

First, when the summer cooling cycle is described, the heat transfer fluid circulates the heat exchange tube 14 by the circulation pump 22 and discharges heat that the heat transfer fluid has in the ground during heat exchange with the geothermal heat. Heat is discharged to the heat transfer fluid having cold heat energy reaches the heat exchange unit 24 through the heat exchange tube 14, the heat transfer fluid having cold heat energy is heat exchanged with hot air or cooling circulating water in the heat exchange unit (24) It uses cold heat energy for cooling. In this process, the heat transfer fluid absorbs heat, and the heat transfer fluid having hot heat energy through heat exchange in the heat exchange unit 24 again exchanges heat with geothermal heat by moving the heat exchange tube 14 by the circulation pump 22. During the heat exchange process with the geothermal heat, the hot heat energy of the heat transfer fluid is discharged to the ground and the cold heat energy is obtained again. The heat transfer fluid with cold heat energy reaches the heat exchange part 24 by the circulation pump 22, and the heat transfer fluid with cold heat energy is heat exchanged again in the heat exchange part 24 to use cold heat energy for cooling. By repeating this process, geothermal heat is used for cooling in summer.

 In addition, when the winter heating cycle is described, the heat transfer fluid absorbs geothermal heat in the process of heat exchange with the geothermal heat while the heat transfer fluid moves through the heat exchange tube 14 by the circulation pump 22. The heat transfer fluid having hot heat energy by absorbing the geothermal heat reaches the heat exchange unit 24 through the heat exchange tube 14, and the heat transfer fluid having hot heat energy undergoes heat exchange with cold air or heating circulating water in the heat exchange unit 24. Thermal energy is used for heating. The heat transfer fluid having cold heat energy through heat exchange in the heat exchange part 24 exchanges heat with geothermal heat by moving the heat exchange tube 14 again by the circulation pump 22, and in this process, it absorbs geothermal heat and heats again hot heat energy. Will have The heat transfer fluid having hot heat energy reaches the heat exchange part 24 by the circulation pump 22, and the heat transfer fluid having hot heat energy is heat exchanged in the heat exchange part 24 to use hot heat energy for heating. This process is repeated to use geothermal heat for winter heating.

Since other components are as described above, description thereof will be omitted.

8 is a configuration diagram showing a geothermal heat exchange system according to a third embodiment of the present invention. Referring to FIG. 8, the air hole tube 12, the wall, the through hole 20, the first heat exchange tube 26, the second heat exchange tube 28, the first heat exchanger 30, and the second heat exchanger 32 The first circulation pump 34 and the second circulation pump 36 are shown.

In the geothermal heat exchange system according to the present embodiment, a through hole 20 penetrating through a wall of another underground space from a wall of one underground space and a plurality of holes inserted into the through hole 20 and into which ground water flows are formed. The first heat exchange tube 26 and the second heat exchange tube 28 and the first heat exchange tube 26 coupled to the oil hole tube 12, the heat transfer fluid inserted into the oil hole tube 12 to exchange heat with geothermal heat, and one end of the first heat exchange tube 26 are coupled to each other. The first heat exchanger part 30, in which the heat transfer fluid is heat-exchanged, and the heat transfer fluid heat exchanged in the first heat exchange part 30 by being coupled to one end of the second heat exchanger pipe 28, are transferred to the other end of the second heat exchanger pipe 28. It is coupled to the other end of the first circulation pump 34 and the second heat exchange tube 28, and the other end of the second heat exchange unit 32 and the first heat exchange tube 26 through which the pressurized heat transfer fluid is heat-exchanged. And a second circulation pump 36 for transferring the heat-transfer fluid heat-exchanged in the second heat exchanger 32 to one end of the first heat exchange tube 26. In addition, geothermal heat recovery can be recovered on a large scale by constructing a geothermal heat exchange system using underground spaces that were previously unused.

The through hole 20 penetrates walls of one underground space from walls of another underground space. Underground space refers to underground spaces already constructed underground such as subway tunnels, underground common areas, underground parking lots. The through hole 20 passing through the underground space may be drilled by a tunnel propulsion method known to those skilled in the art, such as a tunnel boring machine (TBM) method, a steel pipe propulsion method, a NATM (New Austrian Tunneling Method) method.

The hole tube 12 is inserted into the through hole 20 and a plurality of holes into which groundwater flows is formed. At the same time as the through hole 20 is inserted into the perforated tube 12 may serve as the support material. In use, a plurality of holes are formed on the surface of the perforated pipe 12 so that when there is a groundwater level in the ground, groundwater flows through the hole of the perforated pipe 12.

The heat exchange tubes 26 and 28 are inserted into the perforated tube 12 and provide a passage through which the heat transfer fluid moves. A pipe made of a material having high thermal conductivity may be used so that the heat exchange with the groundwater introduced through the hole 12 may be efficiently performed. For example, polyethylene pipes may be used. In addition, a tube of a material that is obvious to those skilled in the art having high thermal conductivity may be used as a heat exchange tube.

A plurality of heat exchanger tubes may be inserted into the air hole 12, some of the plurality of heat exchanger tubes constitute the first heat exchanger tube 26, and some of the plurality of heat exchanger tubes constitute the second heat exchanger tube 28. The first heat exchange tube 26 and the second heat exchange tube 28 are divided according to the moving direction of the heat transfer fluid.

Each of the first heat exchange tube 26 and the second heat exchange tube 28 may be provided in plural in the oil hole tube 12 to increase the heat exchange efficiency between the heat transfer fluid and the geothermal heat. When the plurality of first heat exchanger tube 26 and the second heat exchanger tube 28 are inserted into the perforated tube 12, the interval maintaining the interval between the plurality of first heat exchanger tube 26 and the second heat exchanger tube 28 is maintained. It may further comprise ash.

The heat transfer fluid moving in the first heat exchange tube 26 is heat exchanged with the geothermal heat in the process of moving along the first heat exchange tube 26, the heat transfer fluid heat exchanged with the geothermal heat is one end of the first heat exchange tube 26 Heat exchange occurs in the first heat exchange unit 30 coupled to the heat energy obtained through this can be used externally such as heating and cooling.

In addition, the heat transfer fluid moving in the second heat exchange tube 28 is heat exchanged with the geothermal heat in the process of moving along the second heat exchange tube 28, the heat transfer fluid heat-exchanged with the geothermal heat is the second heat exchange tube (28) Heat exchange occurs in the second heat exchanger 32 coupled to the other end of the heat energy obtained through this can be used externally such as heating and cooling.

In addition, each of the first heat exchange tube 26 and the second heat exchange tube 28 may include an inner tube through which the heat transfer fluid moves and an outer tube into which the inner tube is inserted. If the heat exchanger tube is damaged during use or construction, the inner tube through which the heat transfer fluid moves is removed and a new inner tube is inserted into the outer tube to replace the defect. On the other hand, a plurality of holes can be formed in the outer tube. When the heat exchanger tube is buried below the groundwater level, the groundwater flows in through the hole of the outer tube so that the heat exchange fluid is in direct contact with the inner tube to facilitate heat exchange.

The heat exchanger (30, 32) is a place where the heat transfer heat exchanged with geothermal heat flows into the heat exchanger (30, 32) cold heat energy or hot heat energy obtained through heat exchange with the heat transfer fluid in the heat exchange unit 30, 32 will be used for cooling and heating of the adjacent structure Can be.

The first heat exchanger 30 is coupled to one end of the first heat exchanger tube 26 to exchange heat transfer fluid. The heat transfer fluid undergoes heat exchange with geothermal heat in the process of moving the first heat exchange tube 26, and the heat transfer fluid introduced from one end of the first heat exchange tube 26 undergoes heat exchange in the first heat exchange unit 30. The heat energy obtained through heat exchange in the heat exchanger 30 may be used for external cooling and heating.

The second heat exchange part 32 is coupled to the other end of the second heat exchange tube 28 so that the heat transfer fluid pressurized by the first circulation pump 34 is heat exchanged.

The heat transfer fluid heat-exchanged in the first heat exchange unit 30 is pumped to the other end of the second heat exchange tube 28 by the first circulation pump 34, and the geothermal heat in the process of being pressured through the second heat exchange tube 28. Heat exchange occurs, and the heat transfer fluid introduced from the other end of the second heat exchange tube 28 undergoes heat exchange in the second heat exchange unit 32, and thermal energy obtained through heat exchange in the second heat exchange unit 32 may be used for cooling and heating. have.

It is also possible to use the cold heat energy or hot heat energy obtained from the heat exchanger (30, 32), but it is also possible to use a heat pump (heat pump) for cooling and heating to increase the efficiency of heating and cooling.

The circulation pumps 34 and 36 allow the heat transfer fluid to circulate the ground through the heat exchange tubes 26 and 28 so that heat and heat exchange occurs.

The first circulation pump 34 is coupled to one end of the second heat exchange tube 28 to pump the heat transfer fluid that has undergone heat exchange in the first heat exchange unit 30 to the other end of the second heat exchange tube 28. A second heat transfer fluid absorbing heat or heat generated in the first heat exchanger 30 is pressurized through the second heat exchanger tube 28 to be heat-exchanged with the geothermal heat and connected to the other end of the second heat exchanger tube 28. It is moved to the heat exchange unit (32). The heat transfer fluid heat-exchanged in the first heat exchange unit 30 by the first circulation pump 34 is pumped to the other end of the second heat exchange tube 28, and the heat transfer fluid flows through the other end of the second heat exchange tube 28. The heat exchange is made in the second heat exchanger (32).

The second circulation pump 36 is coupled to the other end of the first heat exchanger pipe 26 to pump the heat transfer fluid that has undergone heat exchange in the second heat exchanger 32 to one end of the first heat exchanger pipe 26. The first heat exchanger 30 connected to one end of the first heat exchanger tube 26 by performing heat-exchange with geothermal heat while the heat transfer fluid that has undergone heat exchange in the second heat exchanger unit 32 is pressurized through the first heat exchanger tube 26. To be moved.

9 is a configuration diagram showing a geothermal heat exchange system according to a fourth embodiment of the present invention. 9, the first through hole 12a, the second through hole 20b, the first heat exchange tube 26, the second heat exchange tube 28, the first heat exchange unit 30, and the second heat exchange unit 32, a first circulation pump 34, a second circulation pump 36, a first oil hole 38, and a second oil hole 40 are shown.

In the geothermal heat exchange system according to the third embodiment described above, the first heat exchanger tube 26 and the second heat exchanger tube 28 are inserted together in one perforated tube so as to exchange heat with the geothermal heat. Shows a form in which the first heat exchanger tube 26 and the second heat exchanger tube 28 are respectively inserted into each of the pair of perforated tubes 38 and 40.

That is, the first through hole 20a and the second through hole 20b penetrating through the wall 18 of one underground space are drilled, and the first through hole 20a and In each of the second through holes 20b, a first hole hole 38 and a second hole hole 40 are respectively inserted. In addition, a first heat exchanger tube 26 and a second heat exchanger tube 28 are inserted into the first and second hole tubes 38 and 40, respectively.

When constructing a large-scale geothermal heat exchange system, a plurality of through holes penetrating between the walls 18 of the underground space are drilled into a plurality of through-holes. The heat exchange parts 30 and 32 may be provided at the ends, respectively.

A part of the plurality of heat exchanger tubes inserted into the plurality of air hole tubes may be constituted by the first heat exchange tube 26, and the remaining heat exchange tube may be constituted by the second heat exchange tube 28. It is also possible to construct the geothermal heat exchange system by configuring the heat exchanger tube with the first heat exchanger tube 26 and the second heat exchanger tube 28.

Since other components are as described above, a description thereof will be omitted.

Hereinafter, referring to FIGS. 8 and 9, when the air conditioning is performed using the geothermal heat exchange system of the third and fourth embodiments, the geothermal heat exchange process will be divided into a cooling cycle and a heating cycle.

First, in the summer cooling cycle, the heat transfer fluid moves the first heat exchange tube 26 by the second circulation pump 36 to discharge heat that the heat transfer fluid has in the ground during heat exchange with the geothermal heat. . Heat is discharged so that the heat transfer fluid having cold heat energy reaches the first heat exchange unit 30 through the first heat exchange tube 26, and the heat transfer fluid having cold heat energy is heated in the first heat exchange unit 30. 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 thermal energy through heat exchange in the first heat exchange unit 30 moves the second heat exchange tube 28 by the first circulation pump 34, and thus, Heat exchange. In this process, the hot heat energy of the electrothermal fluid is discharged to the ground, and the cold heat energy is again obtained. The heat transfer fluid having cold heat energy reaches the second heat exchange part 32 through the second heat exchange tube 28 and heat exchange is performed in the second heat exchange part 32 to use the cool heat energy for cooling. The heat transfer fluid having hot thermal energy through heat exchange in the second heat exchanger 32 exchanges heat with geothermal heat while moving the first heat exchange tube 26 by the second circulation pump 36.

In addition, when the winter heating cycle is described, the heat transfer fluid absorbs the geothermal heat in the process of heat exchange with the geothermal heat while the heat transfer fluid moves to the first heat exchange tube 26 by the second circulation pump 36. The heat transfer fluid having geothermal heat absorbing the hot heat reaches the first heat exchange unit 30 through the first heat exchange tube 26, and the heat transfer fluid having hot heat energy passes through the cold air or heating circulation in the first heat exchange unit 30. 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 30 exchanges heat with geothermal heat while moving the second heat exchange tube 28 by the first circulation pump 34. In the process, it absorbs geothermal heat and again has hot thermal energy. The heat transfer fluid having hot heat energy reaches the second heat exchange part 32 through the second heat exchange tube 28 and heat exchange is performed in the second heat exchange part 32 to use hot heat energy for heating. The heat transfer fluid having cold thermal energy through the heat exchange in the second heat exchanger 32 exchanges heat with the geothermal heat while moving the first heat exchanger tube 26 by the second circulation pump 36.

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

10 is a flowchart illustrating a geothermal heat exchange system construction method according to a fifth embodiment of the present invention, and FIGS. 11 to 13 are flowcharts illustrating a geothermal heat exchange system construction method according to a fifth embodiment of the present invention. 11 to 13, the geothermal heat exchange pipe 11, the air hole tube 12, the heat exchange tube 14, the spacer 16, the wall 18, the through hole 20, and the TBM 42 Is shown.

The geothermal heat exchange system construction method according to the present embodiment is inserted into the oil hole tube 12 and the oil hole tube 12 in which a plurality of holes into which groundwater flows is formed in a longitudinal direction, and a heat exchange tube through which the heat transfer fluid that exchanges heat with geothermal heat is moved ( As a method of constructing a geothermal heat exchange system using a geothermal heat exchange pipe (11) comprising a 14), through-holes 20 penetrating through the walls 18 of one underground space to the walls 18 of the other underground space Including a step of drilling and inserting the geothermal heat exchange pipe 11 into the through hole 20, geothermal heat recovery can be recovered on a large scale by constructing a geothermal heat exchange system using an underground space that has not been used.

Looking at the geothermal heat exchange system construction method according to this embodiment, as shown in Figure 11 and 12, the through-hole 20 penetrating through the wall 18 of the other underground space from the wall 18 of one underground space Puncture) (S100). Since the underground space is a space that is already constructed at a depth that is easy to secure geothermal heat, by drilling a through hole 20 penetrating the walls 18 of the two underground spaces and embedding a tube through which the heat transfer fluid circulates in the through hole 20. The geothermal heat exchange system can be constructed at low cost in the unused underground space.

The through hole 20 penetrates the wall 18 of another underground space from the wall 18 of one underground space. Underground space refers to underground spaces already constructed underground such as subway tunnels, underground common areas, underground parking lots. The through hole 20 passing through the underground space may be drilled by a tunnel propulsion method known to those skilled in the art, such as a tunnel boring machine (TBM) method, a steel pipe propulsion method, a NATM (New Austrian Tunneling Method) method.

In this embodiment, the TBM 42 (Tunnel Boring Machine) is excavated in one underground space to reach the other underground space to provide a method of forming the through-hole 20. In this case, the diameter of the TBM 42 may be determined according to the size of the underground space. Excavation method using TBM (42) is a method of excavating shear surface with no vibration and no blasting, and it is advantageous for construction in urban area by rotating the cutter head equipped with a plurality of disc cutters in front and crushing the rock. .

Next, as shown in FIG. 12, the geothermal heat exchange pipe 11 is inserted into the through hole 20 (S200). The geothermal heat exchange pipe 11 includes a heat hole tube 12 in which a plurality of holes into which ground water flows is formed, and a heat exchange tube 14 inserted in a length direction in the hole hole 12 and in which a heat transfer fluid that exchanges heat with geothermal heat moves. . The geothermal heat exchange pipe 11 may be inserted at the same time as the through hole 20 is punctured to serve as the support material. In use, a plurality of holes are formed on the surface of the perforated pipe 12 so that when there is a groundwater level in the ground, groundwater flows through the hole of the perforated pipe 12.

When the geothermal heat exchange pipe 11 is installed, a circulation pump may be configured to arrange a circulation pump to circulate the heat fluid, and a geothermal heat exchange system may be constructed by installing a heat exchanger in the middle of the circulation structure.

Since other components are as described above, a description thereof will be omitted.

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.

3 is a perspective view of a geothermal heat exchange pipe according to a first embodiment of the present invention.

4 is a sectional view of a geothermal heat exchange pipe according to a first embodiment of the present invention.

5 is a view showing a spacer for the geothermal heat exchange pipe according to the first embodiment of the present invention.

6 is a perspective view of a heat exchange tube of a geothermal heat exchange pipe according to a first embodiment of the present invention.

7 is a block diagram showing a geothermal heat exchange system according to a second embodiment of the present invention.

8 is a block diagram showing a geothermal heat exchange system according to a third embodiment of the present invention.

9 is a configuration diagram showing a geothermal heat exchange system according to a fourth embodiment of the present invention.

10 is a flow chart of a geothermal heat exchange system construction method according to a fifth embodiment of the present invention.

11 to 13 is a flow chart showing a geothermal heat exchange system construction method according to a fifth embodiment of the present invention.

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

11: geothermal heat exchange pipe 12, 38, 40: perforated pipe

14, 26, 28: heat exchanger tube 16: space keeping material

18: wall 20, 20a, 20b: through hole

22, 34, 36: circulation pump 24, 30, 32: heat exchanger

42: Tunnel Boring Machine (TBM)

Claims (19)

Buried in the ground, the heat transfer fluid that exchanges heat with geothermal heat is a pipe, A perforated pipe formed with a plurality of holes through which groundwater flows; A plurality of heat exchange tubes inserted into the plurality of oil holes and into which the heat transfer fluid is moved; And A plurality of fixing rings into which the plurality of heat exchange tubes are inserted, and the plurality of fixing rings are connected to each other so as to maintain a distance between the plurality of fixing rings, and protrude from an outer fixing ring of the plurality of fixing rings. Geothermal heat exchange pipe comprising a gap retaining material having a plurality of projections coupled to the inner wall to maintain the spacing of the plurality of heat exchange tubes. delete delete The method of claim 1, The heat exchanger tube, An inner tube through which the heat transfer fluid moves; And Geothermal heat exchange pipe comprising an outer tube into which the inner tube is inserted. 5. The method of claim 4, Geothermal heat exchange pipe, characterized in that the outer tube is formed with a plurality of holes. A through hole penetrating a wall of one underground space from a wall of another underground space; A perforated tube inserted into the through hole and having a plurality of holes through which groundwater flows; A heat exchange tube inserted into the oil hole and the heat transfer fluid to exchange heat with geothermal heat; A circulation pump for pumping the heat transfer fluid along the heat exchange tube; And Geothermal heat exchange system comprising a heat exchanger is coupled to the heat exchange tube and the heat transfer fluid circulated. The method of claim 6, The heat exchange tube is inserted into a plurality of, Geothermal heat exchange system further comprises a spacer for maintaining the interval of the plurality of heat exchanger tube. The method of claim 6, The heat exchanger tube, An inner tube through which the heat transfer fluid moves; And Geothermal heat exchange system comprising an outer tube into which the inner tube is inserted. The method of claim 8, Geothermal heat exchange system, characterized in that the outer tube is formed with a plurality of holes. A through hole penetrating a wall of one underground space from a wall of another underground space; A perforated tube inserted into the through hole and having a plurality of holes through which groundwater flows; A first heat exchanger tube and a second heat exchanger tube inserted into the air hole and into which heat transfer fluid that exchanges heat with geothermal heat is moved; A first heat exchanger coupled to one end of the first heat exchanger tube and configured to heat exchange the heat transfer fluid; A first circulation pump coupled to one end of the second heat exchanger tube and transferring the heat transfer fluid heat-exchanged in the first heat exchanger to the other end of the second heat exchanger tube; A second heat exchanger coupled to the other end of the second heat exchanger tube and configured to heat-exchange the pressurized heat transfer fluid; And And a second circulation pump coupled to the other end of the first heat exchanger tube and transferring the heat transfer fluid exchanged by the second heat exchanger to one end of the first heat exchanger tube. The method of claim 10, The through hole includes a first through hole and a second through hole, The perforated pipe includes a first perforated pipe and a second perforated pipe respectively inserted into the first through hole and the second through hole, And the first heat exchanger tube and the second heat exchanger tube are respectively inserted into the first oil hole and the second oil hole. The method of claim 10, The first heat exchange tube and the second heat exchange tube is inserted into a plurality of, Geothermal heat exchange system further comprises a spacer for maintaining a gap between the plurality of first heat exchange tube and the second heat exchange tube. The method of claim 10, Each of the first heat exchange tube and the second heat exchange tube, An inner tube through which the heat transfer fluid moves; And Geothermal heat exchange system comprising an outer tube into which the inner tube is inserted. The method of claim 13, Geothermal heat exchange system, characterized in that the outer tube is formed with a plurality of holes. A method of constructing a geothermal heat exchange system using a geothermal heat exchange pipe including an air hole tube in which a plurality of holes into which ground water flows is formed, and a heat exchange tube inserted into the hole tube in a longitudinal direction and in which a heat transfer fluid that exchanges heat with geothermal heat moves, Drilling through-holes through walls of one underground space and through walls of another underground space; Geothermal heat exchange system construction method comprising the step of inserting the geothermal heat exchange pipe into the through hole. The method of claim 15, The perforating step, Geothermal heat exchange system construction method characterized in that performed by TBM (Tunnel Boring Machine). The method of claim 15, The heat exchange tube is inserted into a plurality of the perforated tube, Geothermal heat exchange system construction method characterized in that it further comprises a gap retaining material for maintaining the interval of the plurality of heat exchange tubes. The method of claim 15, The heat exchanger tube, An inner tube through which the heat transfer fluid moves; And Geothermal heat exchange system construction method comprising the outer tube is inserted into the inner tube. The method of claim 18, Geothermal heat exchange system construction method characterized in that the outer tube is formed with a plurality of holes.

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