KR101792145B1 - Geothermal system include heat exchange in well - Google Patents

Abstract

The present invention relates to a geothermal system constituting an internal heat exchanger, and more particularly, to a geothermal system constituting an internal heat exchanger, more specifically, when an underground water level is low and an operation power of an underwater pump is excessively required or a heat pump is installed at a close position, It is possible to make an economical geothermal system operation even in a region where the natural water level of the ground water is low and also to constitute the gas side heat exchanger of the heat pump in the air heat exchanger by making the underground heat exchange and the heat pump heat exchange inside the air heat exchanger will be.
The geothermal system constituting the in-hole heat exchanger according to the present invention comprises a geothermal hole (10) formed in the ground, a heat pump (20) installed on the ground around the geothermal hole, An in-air heat exchanger (30) installed inside the tearing hole to recover the heat of the groundwater and heat-exchange the heat with the heat pump; Groundwater circulation means (40) for supplying and returning groundwater to the in-air heat exchanger; And a heat medium circulation means (50) for performing heat exchange between the heat pump and the in-air heat exchanger through circulation of the heat medium, wherein the in-air heat exchanger is heat-exchanged with the heat source side heat exchanger of the heat pump via the heat medium circulation means And is a separate heat exchange.
The geothermal system constituting the in-hole heat exchanger according to the present invention comprises a geothermal hole (10) formed in the ground, a heat pump (20) installed on the ground around the geothermal hole, An in-air heat exchanger (30) installed inside the tearing hole to recover the heat of the groundwater and heat-exchange the heat with the heat pump; And an underground water circulation means (40) for supplying and returning groundwater to the in-hole heat exchanger, wherein the in-hole heat exchanger is a heat source side heat exchanger of the heat pump.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a geothermal heat exchanger,

The present invention relates to a geothermal system constituting an internal heat exchanger, and more particularly, to a geothermal system constituting an internal heat exchanger, more specifically, when a groundwater level is low and an operation power of a submersible pump is excessively required or a heat pump is installed at a close position, The heat exchange and the heat pump heat exchange can be performed in the inside of the heat exchanger, and in particular, the geothermal system can be operated economically even in a low natural water level of the ground water, and the gas side heat exchanger of the heat pump is configured in the in- The present invention relates to a geothermal system constituting an in-house heat exchanger capable of construction, maintenance, and economical operation with facility cost and easy operation.

Geothermal heat refers to the natural heat and ground heat of groundwater pumped by excavating groundwater. Generally, the ground surface is excavated at a deep depth of about 100 meters or more and 500 meters or so, and there is a pipe for heat exchange, The groundwater pumping pump and the pumping water were installed in the same way as the groundwater treatment facility, and the groundwater was pumped, and the heat of the groundwater was heat-exchanged using the heat pump, and then the groundwater exchanged with the heat- And a heat exchange system for returning to the inside is used.

The groundwater temperature is maintained at a temperature of 15 ° C to 17 ° C throughout the year without changing the ground temperature. When the groundwater having this temperature is pumped and heat is used by using the heat pump, the amount of water of the groundwater pump is reached to 1000 liters per hour. At 4 ℃, it is possible to obtain 4000 calories per hour of heat. The temperature of the groundwater that has been exchanged by the heat exchange is lowered through the heat exchanger pipe to the inside of the groundwater trench and heat exchanged again by the heat in the ground. So that such cycles can be maintained in a continuously available state. The facility using this principle is a geothermal heating and cooling system.

In the geothermal heating and cooling system, it is essential that the excavated groundwater is an excavated groundwater facility. In particular, in the case of a facility for pumping groundwater and exchanging heat, it is necessary to connect the groundwater pump and the pumping water pipe to the inside of the excavated groundwater .

In contrast to general groundwater care, groundwater treatment for geothermal water does not disappear by using a large amount of ground water, but only the heat of the ground water is exchanged, and the underground water that has been pumped is returned to the inside of the groundwater trench For this reason, unlike the underground water that uses underground water, the drilling is carried out with a diameter that can secure the minimum space where the groundwater pump and the water pipe are installed in order to lower the facility cost. On the other hand, There was a problem that the groundwater could not be put into the depths of the groundwater along the water pipe.

On the other hand, geothermal underground heat exchangers using groundwater trenches are classified into two types: sealed type and open type.

In the closed type, the high density polyethylene pipe (HDPE) for heat exchange is vertically connected by the U tube in the tear hole, and the heat exchanging brine is circulated inside the trench and the ground heat can be exchanged.

Open type is similar to general ground water system, but ground water pumped by underwater motor pump is heat-exchanged through heat exchanger of the heat pump installed on the ground, and ground water returned to circulation is again returned to the inside of the trench so that the earth heat can be exchanged .

A typical open-type geothermal heat exchanger is constructed by a PVC pipe with a diameter of 100 to 125 mm inside the trench, excavated at a depth of 300 ~ 500m and a depth of 200 ~ 250mm. .

In the lower section, a pipe with a strainer is connected, and an underwater pump is installed in the upper part of the inner casing to circulate the ground water up to the ground heat pump through a pumping pipe.

Various types of open-loop heat exchangers have been developed and applied.

The so-called Gehoil method has an inner casing on the inner side of the trench and a porosity pipe on the bottom. Filling the inner casing with the trench is filled with bean gravel, for example, And installed. The advantage of this method is that an open geothermal underground heat exchanger can prevent an accident that the excavation hole is drowned during operation, while the flow resistance of circulating groundwater, which is returned through the water distribution pipe, There is a problem that cases are frequently found. Furthermore, among the internal casings installed for the circulation of the open geothrophy, the distribution of the pipe installation is intensively arranged at the lower part near the bottom of the geothermal hole, so that when the soil slurry flowing together with the groundwater accumulates during the operation of the facility, As well as the end portion of the circulation pipe, consequently causing a circulatory disorder.

In order to improve this, a circulation duct is formed at the bottom of the inner casing, and the circulation flow of the circulating groundwater is greatly improved by connecting the return pipe to the circulation pipe.

However, in such an open geothermal system, it is possible to operate in a region where the natural water level from the surface of the earth to the groundwater is maintained at about 10 to 20 m. However, in Jeju Island, which is a volcanic basalt region, The groundwater level is maintained based on the height of the sea surface, and the groundwater level is high in the region close to the sea level, so there is no great difficulty in constructing the geothermal system. However, when the groundwater level goes up to the middle mountainous region, the groundwater level is located 100 to 200 m below the ground surface. The operation head of the underwater pump is excessively large in construction, and the cost of the operation power is increased, so that the economical geothermal system operation can not be operated.

In addition, when the installation position of the heat pump is installed close to the tail hole, the gas-side heat exchanger of the heat pump is installed inside the tail hole so that the facility cost can be greatly reduced and the system configuration can be simplified. There was a need for technology development.

Published Japanese Patent Application No. 10-2016-0104591

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide an economical geothermal system configuration, The present invention has been made to provide a geothermal system in which an in-air heat exchanger having an inexpensive facility cost and a simple configuration is constructed.

Another object of the present invention is to provide a geothermal heat exchanger which can improve the efficiency of the geothermal heat exchanger by making the aquifer underground water at different depths in the geothermal hole to be watered and returned to the heat pump side heat exchanger, The purpose is to provide

The geothermal system constituting the in-hole heat exchanger according to the present invention includes a geothermal hole formed in the ground, a heat pump installed on the ground around the ground hole, An in-air heat exchanger installed in the tearing hole to recover the heat of groundwater and heat-exchange the heat with the heat pump; Groundwater circulation means for supplying and returning groundwater to the in-air heat exchanger; And a heat medium circulation means for effecting heat exchange between the heat pump and the in-air heat exchanger through the circulation of the heat medium, wherein the in-air heat exchanger is provided with a heat exchanger for heat exchange with the heat source side heat exchanger of the heat pump via the heat medium circulation means .

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According to the geothermal system constituting the in-hole heat exchanger according to the present invention, the ground water is circulated through the pumping of the underwater pump even in a region where the ground water level is very low, and water is supplied to the in-hole heat exchanger. The geothermal system using the groundwater circulation can be completed and the geothermal system can be economically operated even on the excessively low groundwater. In addition, the gas-side heat exchanger of the heat pump installed so as to be close to the ground hole can be incorporated in the air-to-air heat exchanger, thereby providing an economical system configuration.

In addition, geothermal heat system can be operated by shortening the geothermal heat recovery time by utilizing the geothermal heat by partitioning the aquifers developed by different geological layers with different depths.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall configuration diagram of a geothermal system constituting an in-air heat exchanger according to the present invention; FIG.
2 is a cross-sectional view of a heat exchanger of a geothermal system constituting an air-to-air heat exchanger according to the present invention.
3 is a plan view of the upper end plate of the geothermal system constituting the in-hole heat exchanger according to the present invention.
FIG. 4 is an upper part plan view of a geothermal system constituting the public heat-exchanger according to the present invention. FIG.
FIG. 5 is a bottom view of a bottom partition of a geothermal system constituting an in-air heat exchanger according to the present invention. FIG.
6 is a cross-sectional view of a heat exchanger in the form of a U-band coin tube of a geothermal system constituting an air-to-air heat exchanger according to the present invention.
FIG. 7 is a sectional view of a geothermal system in which an inner casing of a geothermal system constituting an in-air heat exchanger according to the present invention is installed.
FIG. 8 is a sectional view of a circulation diaphragm in a geothermal system constituting an in-hole heat exchanger according to the present invention; FIG.
FIG. 9 is an exemplary diagram showing a water heat exchanger applied to a geothermal system constituting an air-to-air heat exchanger according to the present invention; FIG.
FIG. 10 is an exemplary view of a geothermal system constituting an air-to-air heat exchanger according to the present invention, to which a drop-water heat exchanger is applied and a shield member for an aquifer compartment is applied.
FIG. 11 is an enlarged view of a drop-water heat exchanger applied to a geothermal system constituting an in-hole heat exchanger according to the present invention. FIG.
FIG. 12 is a view showing a flow of falling water from a drop-water heat exchanger to a geothermal system constituting an in-hole heat exchanger according to the present invention; FIG.
FIG. 13 is a view showing an example in which a geothermal system constituting an air-to-air heat exchanger according to the present invention is divided into water supply and water return sections per aquifer, and a water return pipe is located above the water supply pump.
FIGS. 14 and 15 are a front view and a plan view, respectively, in which an outer wall heat exchange coil pipe is applied to a geothermal system constituting an in-air heat exchanger according to the present invention.
16 is a view showing the application of the shielding packer to the in-air heat exchanger of the geothermal system constituting the air-to-air heat exchanger according to the present invention.
17 is a plan view of the shielding packer;
18 and 19 are views showing an example in which the geothermal system constituting the air-to-air heat exchanger according to the present invention is divided into water supply and water return sections by aquifer and water pipes are installed to communicate with the upper aquifer.
FIG. 20 is a diagram showing another example of an in-hole heat exchanger applied to a geothermal system constituting an in-hole heat exchanger according to the present invention; FIG.
Fig. 21 is a modification of the air-to-air heat exchanger of Fig. 20;

≪ Example 1 >

1, the geothermal system constituting the in-hole heat exchanger according to the present embodiment includes a geothermal hole 10 formed in the ground, a heat pump 20 installed on the ground around the geothermal hole 10, A groundwater circulation means 40 for supplying and returning groundwater to and from the in-hole heat exchanger 30, a heat pump (not shown) 20) and the in-air heat exchanger (30).

The trench 10 includes all forms that are drilled in the ground for geothermal systems.

In order to prevent clogging of the ground hole 1 due to the collapse of the ground and contamination of ground water, a recess-preventing casing 11 may be installed on the inner wall of the ground hole 10. In addition, the grouting wall 12 may be formed on the outer side of the depression preventing casing 11.

The heat pump 20 is constituted by the compressor 21, the first and second heat exchangers 22 and 23, and the expansion valve 24, and a four-way valve may be used together. The second heat exchanger (23) is connected to the in-air heat exchanger (30) and the heat medium circulation means (50). The first heat exchanger (22) is a load side heat exchanger, and the second heat exchanger (23) is a heat source side heat exchanger.

The in-hole heat exchanger 30 is configured to perform heat exchange between groundwater circulated by the groundwater circulation means 40 and a heat medium circulated by the heat medium circulation means 50, and for example, two flow paths are formed.

The in-air heat exchanger (30) uses a product having the same ability as that of the second heat exchanger (23) so that the heat exchange with the second heat exchanger (23) is performed smoothly.

The in-air heat exchanger (30) can be installed so as to be submerged in the groundwater and not to be immersed in the groundwater.

All or part of the groundwater can be submerged under the premise of heat exchange with groundwater.

The groundwater circulation means 40 includes a water supply pump 41 for pumping groundwater in the ground hole 10 and a water supply pipe 42 for supplying groundwater pumped by the water supply pump 41 to the in- And a water return pipe 43 for returning the ground water that has passed through the in-hole heat exchanger 30 to the ground hole 10. The water feed pump 41 is selectively applied as needed.

The water supply pipe 41 is connected to the water supply pump 41 and the in-pipe heat exchanger 30 and supplies the ground water pumped by the water supply pump 41 to the in- So that heat exchange is performed between the groundwater and the heating medium of the in-air heat exchanger 30. The one end of the heat exchanger 43 is connected to the in-air heat exchanger 30 And the groundwater is returned to the inside of the tearing hole 10 through the other water returning hole. That is, the groundwater circulates through the underwater pump 41, the water supply pipe 42, the in-air heat exchanger 30, the water return pipe 43, and the underwater pump 41 as a path.

The power panel for driving the water feed pump 41, the power cable, and the control that is turned on and off by the water level control can be operated with a common facility and configuration, and all the related configurations are included in the range of the water pump 41 And detailed description thereof will be omitted.

The water return pipe 43 is installed such that the circulation means (the portion having the return hole) is disposed close to the separate aquifer below the installation section of the water supply pump 41, or close to the bottom of the ground hole 10. The circulation means of the water return pipe (43) constitutes the pipe tube (10) with a length of about 10 m so that even if the circulating means is clogged with sand and the like, the circulation of the ground water is prevented through the pipe tube.

In addition, as shown in FIG. 14, the circulation means of the water return pipe 43 may be installed above the installation section of the water supply pump 41, so that the groundwater of the aquifer inhaled by the water supply pump 41 may be injected into a separate aquifer It is also possible to clearly distinguish the water supply and the water return section for each aquifer. As a result, it is possible to operate the geothermal system having high efficiency at all times since the ground water of the water supply section and the water return section is not mixed and mixed in the trench 10.

The heat medium circulation means 50 is for transferring the heat recovered from the groundwater in the in-hole heat exchanger 30 to the second heat exchanger 23 of the heat pump 20 and includes a heat medium pump 51, A heating medium supply pipe 52 connecting the in-air heat exchanger 30 and the second heat exchanger 23 and supplying the heating medium supplied through the heating medium pump 51 to the second heat exchanger 23, a second heat exchanger 23 And a heat medium return pipe 53 (a heat medium supply pipe 52) which connects the internal heat exchanger 30 and the internal heat exchanger 30 and returns the heat medium that has passed through the second heat exchanger 23 to the internal heat exchanger 30 ], And fresh water or brine is used as the heating medium. That is, the heating medium circulates through the air heat exchanger 30, the heating medium supply pipe 52, the second heat exchanger 23, the heating medium return pipe 53, and the in-air heat exchanger 30 by the heating medium pump 51, And is then supplied to the second heat exchanger 23 through the heat medium supply pipe 52 and flows through the heat medium 20 of the heat pump 20 while passing through the second heat exchanger 23, Exchanged, and returned to the in-air heat exchanger (30) through the heat medium return pipe (53).

The heat medium supply pipe 52 and the heat medium return pipe 53 of the heat medium circulation means 50 are piped inside the tearing hole 10 and are piped to a length of about 100 to 200 m in accordance with the depth of the heat exchange heat exchanger 30, 10, heat insulation covers 52a and 53a may be applied to compensate for the heat loss. The heat insulating covers 52a and 53a are all heat insulating materials that surround the heat medium supply pipe 52 and the heat medium return pipe 53 to warm them.

The heating medium supply pipe 52 and the heating medium return pipe 53 may be connected to flow the fluid through the U-band or may be connected to flow the fluid through the enclosed chamber.

That is, in the present invention, since a multi-layered geological layer composed of volcanic basalt rock is formed as a multi-layered layer like a so-called diaphragm layer, an aquifer 13, 14 in which groundwater flows between the respective geological layers is formed, So that the groundwater circulated through the in-air heat exchanger 10 without being focused on the heat exchange by thermal conduction of the rocky lipid is separated by the volcanic rock layer The aquifer is formed so as to be injected into the aquifer which is recycled in the aquifer constituted by the space or the vacant space on the groundwater level. In this way, the aquifer for taking in the groundwater for the water supply and the aquifer selected for the water exchange are separated from each other, so that the temperature of the groundwater circulating in the air heat exchanger 10 can be kept constant, So that the effect can be greatly improved. It is a matter of course that the position of the circulation means of the return water pipe 43 to be returned may be located above or below the feed water pump 41 depending on the position of the aquifer. In this case, as shown in FIG. 8 or 9, The shielding packer 16 may be formed so as to be shielded by separating the water layer. When the casing 15 is inserted as shown in FIG. 11 or 14, A circulation diaphragm 17 is provided for shielding the space between the plates. 17 and 18, the shielding packer 16 is constituted by an expansion tube 47 and a tube body 46 that expand when the compressed fluid is injected through the fluid injection tube 71, It can be constructed with various materials and shapes such as rubber pail or rubber plate. The circulating diaphragm (17) is also shielded from the space between the aeration hole (10) and the space between the aeration hole (10) and the casing (15) by using a multiple layer rubber plate, brush or synthetic resin plate or using rubber O ring In particular, a grouting material such as silicone or quick-setting cement may be injected into the upper part of the circulation diaphragm 17 to prevent leakage after shielding. The configuration of the logarithmic interlayer partitioning means (the combination of the circulation partition 17 or the shielding packer 16 or the circulation partition 17 and the shielding packer 16) by using the circulation partition 17 or the shielding packer 16 is, The groundwater heat exchanger having a large capacity of heat exchange ability can be constructed even if the depth of water is low even if the groundwater level is very low from the surface of the ground, Thereby lowering the running head of the water supply pump 41, thereby making it possible to use the geothermal heat even at a low water level while reducing the power cost of the geothermal system.

When the heat exchanger of the heat pump 20 is used as it is and the heat exchanger 30 is additionally provided and the heat medium circulation means 50 is constituted as in this embodiment, (Not shown) or a buffer tank (not shown) in which a heating medium circulating from the tearing hole 10 is collected in a geothermal system is constructed. The storage tank (not shown) or the buffer tank And the second heat exchanger 23 of the heat pump 20 may be constituted by a separate circulation pump (not shown). In this case, it should be understood that the present invention includes the heat pump as a component of the heat pump.

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Hereinafter, the configuration applied to the embodiments of the present invention will be described in detail.

1. In-house heat exchanger.

≪ In-Air Heat Exchanger Embodiment 1 >

2, the in-air heat exchanger 30 includes a cylindrical body 31 having both sides open in the longitudinal direction, upper and lower covers 32 and 33, respectively, which are coupled to the upper and lower portions of the body 31 The upper and lower partition plates 34 and 34 are formed at positions spaced apart from the upper and lower covers 32 and 33 by a predetermined distance to form the upper and lower chambers 36 and 37, respectively, 35, and a plurality of heat exchange tubes 38 connected to the upper and lower partitions 34, 35 to communicate the upper and lower chambers 36, 37, respectively. The water supply pipe 42 may be connected to the inside of the body 31 or may be connected to the water supply pipe 42 to connect the water supply pipe to the ground water supply pipe.

The body 31 has a tubular structure in which a space is provided for installing a pipe such as a heat exchange pipe 38, and both sides in the longitudinal direction (vertical direction) are preferably opened for installation of the pipe.

The upper lid 32 is provided with holes 32a and 32b through which the supply gas pipe 25 (heat medium supply pipe 52) and the reflux gas pipe 26 (heat medium return pipe 53) respectively pass, Holes are formed and assembled into the body 31 by bolting.

The upper lid (32) is constituted by an air vent (32a) for drawing air into the air heat exchanger (30). The air vent 32a draws air in the inside of the air heat exchanger 30 to the outside, but a check valve can be configured so that air or ground water can not penetrate from the outside.

The lower lid 33 is provided with a hole through which the water supply pipe 42 and the water return pipe 43 pass.

The upper and lower covers (32, 33) are not only plate-shaped but also cap-shaped with a space open toward one side.

2 and 4, the upper diaphragm 34 includes holes 34a and 34b through which the supply gas pipe 25 (heat medium supply pipe 52) and the reflux gas pipe 26 (heat medium return pipe 53) And a hole 34c through which the water supply pipe 42 passes. In addition, a plurality of holes 34d are provided so that the heat exchange tubes 38 communicate with the upper chamber 36, respectively.

2 and 5, the lower partition plate 35 has holes 35a and 35b through which the supply gas pipe 25 (heat medium supply pipe 52) and the reflux gas pipe 26 (heat medium return pipe 53) And a hole 35c through which the water supply pipe 42 passes. Further, a plurality of holes 35d are provided so that the heat exchange tubes 38 communicate with the upper chamber 36, respectively.

The heat exchange pipe 38 is connected to the upper and lower chambers 36 and 37 so as to communicate with the openings of the upper and lower partition plates 34 and 35, To be returned to the tearing hole (10).

The inside of the body 31 of the in-hole heat exchanger 30 is connected to the upper diaphragm 34 and the lower diaphragm 35 so as to divide the space around the water supply pipe 42 so that the water supply section is separated from the water return section. The partition plate 39 can be constructed. The in-hole heat exchanger 30 configured in this way can be installed in an external shape of a conventional shell-and-tube heat exchanger constructed in the conventional heat pump 20 through an engineering design, a heat exchanger, and a scale that does not deviate greatly from the heat capacity size. Of course.

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The groundwater in the ground hole 10 flows into the water supply pipe 42 by the pumping of the water supply pump 41 and is discharged to the upper chamber 36, Flows into the lower chamber 37 through the heat exchange pipe 38 and is collected in the lower chamber 37 and then is returned to the ground hole 10 through the water return pipe 43. [ On the other hand, the heating medium passes through the interior of the air heat exchanger 30 through the supply gas pipe 25 (heat medium supply pipe 52), exchanges heat with groundwater flowing through the surrounding heat exchanger pipe 38, (Heat medium return pipe 53) and is supplied to the heat pump 20. Through this process, the heat exchange between the groundwater and the heat medium, and the heat exchange between the heat medium and the heat pump are performed.

≪ In-Air Heat Exchanger Embodiment 2 >

As shown in FIG. 6, the in-air heat exchanger 30 is configured by changing its structure without using a separate body and a heat exchange pipe.

The in-air heat exchanger 30 is preferably constituted by a heat exchange coil pipe 30a and both sides of the heat exchange coil pipe are connected to the feed gas pipe 25 and the reflux gas pipe 26, respectively. A plurality of heat exchange coil tubes are connected to the supply manifold 30b while a large amount of heat exchange coil tubes are connected to a U band in order to increase heat exchange efficiency, while the other heat exchange coil tubes are connected to a return manifold And the supply manifold 30b and the return manifold 30c are connected to the supply gas pipe 25 and the reflux gas pipe 26, respectively.

The groundwater circulation means 40 is constructed as follows according to the configuration of the in-air heat exchanger 30 described above.

The water supply pipe 42 of the groundwater circulation means 40 is constituted by the injection pipe 44 and one or more injection nozzles 45.

The jetting pipe 44 is disposed above the supply manifold 30a (or the supply manifold 30a and the return manifold 30b), and the jetting nozzles 45 are disposed above the groundwater supplied from the jetting pipe 44 The supply manifold 30a (or the supply manifold 30a and the return manifold 30b) and the heat exchange coil pipe 30a are sprayed to perform heat exchange between the ground water and the heating medium (gas) of the heat pump 20 .
The in-air heat exchanger 30 may have the same structure as that of the in-air heat exchanger 30 described in FIG. 2, and the underground water circulating means 40 is configured in accordance with the structure of the in-

The supply gas pipe 25 (the heating medium supply pipe 52) and the reflux gas pipe 26 (the heating medium return pipe 53), which are connected from the inside of the tearing hole 10 to the ground, (Not shown) to prevent contaminants from entering the trench 10 from the ground surface, and the pipe connection portion is formed inside to facilitate the connection and separation.

Meanwhile, the in-air heat exchanger 30 can be installed directly below or below the deep water surface where the water level of the groundwater is formed, so that the head of the water pump 41 can be minimized so that the operation power ratio can be minimized. This is because the operating power ratio of the heat medium circulating through the in-hole heat exchanger 30 is not large because the heat medium circulating through the in-hole heat exchanger 30 is circulated in the closed space. However, the operating power ratio of the underground water circulating through the in-hole heat exchanger 30 is set to the installation height of the in- This is because it can be greatly affected by the cyclic head that varies.

2. Compartment by aquifer (circulating diaphragm, shielding packer).

As shown in FIGS. 7 and 8, the shielding packer 16 is formed in the water return pipe 43 so that the inter-layer partition between the geologic layers is formed inside the underground heat exchanger. The ground water and the recovered ground water are divided into aquifer So that the heat recovery can be accelerated in the single tearing hole 10, so that the effect of increasing the heat exchange capacity of the tearing hole 10 can be developed.

The shielding packer 16 is provided at a lower portion of the water supply pump 41 and above the circulation means of the water return pipe 43. The shielding packer 16 is sized so as not to interfere with supply of ground water by the water supply pump 41, , And all the configurations for achieving this purpose are possible.

7, in the case where the casing 15 is installed on the entirety of the ground hole 10 in order to protect the water supply pump 41 and the water return pipe 43 from a sinking accident or the like of the ground hole 10 A rubber plate or a shielding packer 16 may be installed on the outer periphery of the casing 15 or grouting may be performed on the upper portion of the shielding packer 16 to separate and operate the upper aquifer 13 and the lower aquifer 14 Of course. At this time, the casing 15 is provided with a flow channel 15a (using a pipe) for each aquifer zone to be shielded so that the flow of the groundwater can be prevented by the upper aquifer 13 and the lower aquifer 14.

3. Draft heat exchanger.

As shown in FIGS. 10 to 12, a drop-water heat exchanger 60 may be constructed on the in-air heat exchanger 30. FIG.

In particular, the geology of Jeju Island has a characteristic that a large amount of groundwater is dripped from the upper part of the underground water in various strata. Therefore, it is also necessary to construct a heat exchanger capable of exchanging heat from a large amount of the groundwater. The circulation diaphragm 17 is installed between the casing 15 and the air holes of the ground hole 10 and the circulation diaphragm 17 is installed on the upper part of the drop-water heat exchanger 60 So that the groundwater stored between the inner wall of the ground hole 10 and the casing 15 is dripped through the oil hole 15a drilled in the casing 60 at the upper portion of the dewatering heat exchanger 60.

The downfalling heat exchanger (60) is constructed so that groundwater, which is dewatered in a state in which the heat exchange coil pipe is exposed, can be directly brought into contact with the heat exchange coil pipe to perform heat exchange, and a plurality of tube tubes, Side tube tube 61 is connected to the supply side of the in-air heat exchanger 30 through the feed-side lower manifold 63 and the return-side tube tube 62 is connected to the return- Side manifold 64 to the return side of the in- Of course, the water supply side tube pipe 61 and the water return side tube pipe 62 are connected to the supply gas pipe 25 (heat medium supply pipe 52) and the reflux gas pipe 26 (The heat medium return pipe 53) so as to circulate the heat medium.

In particular, the upper and lower water supply manifolds 65 and 66 are formed with inclined water drop guiding portions 65a and 66a so that the ground water falling down from the upper portion can be dropped down to the heat exchange tube pipes 61 and 62 sequentially Respectively.

As shown in FIG. 12, the water supply and water return side upper manifolds 65 and 66 are formed at different heights and downwardly inclined toward each other so that the falling water can naturally drop down the inclined water drop guiding portions 65a and 66a. do.

In addition, the heat exchange tubes 61 and 62 are fixed by applying the support plate 67 at regular intervals so that there is no shaking due to pulsation in the circulation process.

Of course, the casing 15 in the section in which the water reducing heat exchanger 60 is installed may be a non-hollow tube, so that the entire drop water heat exchanger 60 may be immersed in the ground water to increase the heat exchange efficiency, 100 in the vicinity of the drop-water heat exchanger (60) so that the ground water that is dripped can evenly contact the drop-water heat exchanger (60).

It is also possible to apply the wire rope 68 capable of withstanding the load during lifting and installation of the drop-water heat exchanger 60 and the in-hole heat exchanger 30. The wire rope 68 is applicable even when only the in-room heat exchanger 30 is applied.

13 shows an example in which different aquifers 13 and 14 are used as a water supply layer and a water return layer in ground water and a shielding packer 16 is disposed at a depth between the aquifers 13 and 14, A water supply pump 41 is installed below the shielding packer 16 and a circulation means of the water return pipe 43 is provided on the upper part of the shielding packer 16. In addition, . Therefore, the groundwater flowing through the aquifer under the ground 14 is supplied through the water supply pump 41, and the groundwater, which is returned through the water return pipe 43, is returned to the upper aquifer 13.

On the other hand, the configuration of the air-to-air heat exchanger (30)

The water supply pipe 41 is connected to the water supply pump 41 and the in-pipe heat exchanger 30 and supplies the ground water pumped by the water supply pump 41 to the in- And the heat exchange between the groundwater and the heating medium of the in-air heat exchanger 30 is performed by supplying the air to the inside of the in-room heat exchanger 30 through the air- The groundwater pumped by the water supply pump 41 is discharged through the lower chamber 37 and is distributed to the plurality of heat exchange tubes 38 and collected into the upper chamber 36, (13) of the tearing hole (10) through the upper tank (43). At this time as well, the shielding packer (16) is configured to function to partition between the logarithmic layers.

Of course, even in the case where the water reducing heat exchanger (60) is installed above the air heat exchanger (30), the shielding packer (16) The circulation diaphragm 17 is provided so that the aquiferspace can be shielded against the space between the casing 15 and the ground hole 10.

18, it is possible to utilize the structure in which the circulation means of the water return pipe 43 can be located in the aquifers above the in-air heat exchanger 30. That is, the water return pipe 43 is connected to the water pump The upper part aquifer 13 in the upper part of the groundwater is disposed to communicate with the upper part aquifer 13 through the shielding packer 16 as shown in Fig. 17, (The empty space), it is possible to constitute a form in which the reclaimed groundwater can be flowed without obstacles, thereby making it possible to construct an efficient geothermal system. This is because the groundwater level of Jeju Island is almost the same as that of the sea surface at all times. Even if the water pump 41 pumped and pumped a lot of groundwater to return the heat-exchanged groundwater to the upper aquifer 13, The groundwater can be replenished at all times, and a geothermal system having a stable heat capacity can be constructed. At this time, the shielding packer 16 is formed by passing a return pipe 43, a heat medium supply pipe 52, a heat medium return pipe 53, or a supply gas pipe 25 and a reflux gas pipe 26 to the tube body 46, The expansion tube 47 is formed on the outer surface of the outer tube 47 or a plurality of rubber plates are formed to provide a shielding function. 19, the same applies to the example in which the water reducing heat exchanger 60 is applied, and the water return pipe 43 is formed in such a manner that the water introducing pipe 43 is formed in such a manner that, So that the upper side aquifer 13 can be returned to the upper side.

 14 and 15 illustrate the structure of the air-to-air heat exchanger 30 shown in FIG. 2 and the air-to-air heat exchanger 30 and the air- Heat exchange with groundwater flowing between the ground holes 10 and heat exchange with groundwater supplied by the water pump 41 is carried out and the outer wall heat exchange pipe 38-1 is connected to the outside of the plurality of heat exchange pipes 38, . A plurality of outer wall heat exchange tubes 38-1 are arranged in a circular shape and are connected by welding or the like so that the upper and lower portions are connected to the inside of the upper and lower chambers 36 and 37 to communicate with the upper chamber 36 through the water supply pipe 42 So that heat exchange with the groundwater flowing through the inner wall of the tearing hole 10 is performed.

≪ Example 3 >

20, the outer housing is removed from the structure of the above-described in-air heat exchanger 30, and the upper chamber 30-2 and the lower U-band or the lower chamber 30-3 are formed as shown in FIG. 4 A plurality of heat exchange coil tubes 30-1 are connected to form an in-hole heat exchanger 30 and a water feed pump 41 as an underwater circulation pump and an in-air heat exchanger 30 are provided to ensure a watertight heat exchange space, And a shielding packer 16 is formed on the upper chamber 30-2 above the coin tube 30-1. At this time, the casing 15 in the section where the in-air heat exchanger 30 is located is provided with a non-hollow pipe so as to form a boundary with the air hole of the tearing hole 10.

The ground water in the lower aquifer 13 is sucked into the inside of the in-hole heat exchanger 30 which is shielded by the shielding packer 16 by the water supply pump 41 and the heat-exchanged groundwater is supplied to the shielding packer And the water is introduced into the upper aquifer 13 through a water return pipe 43 (which may extend from a separate water pipe socket through the shielding packer 16) This configuration simplifies the components and achieves the same heat exchange effect, thereby enabling an economical construction in which a low facility cost is input.

10: Geothermal hole, 2: Heat pump
30: in-air heat exchanger, 40: groundwater circulation means
41: water pump, 42: water pipe
43: a water return pipe, 50: a heat medium circulation means
51: heat medium pump, 52: heat medium supply pipe
53: heat medium return pipe, 60: drop water heat exchanger

Claims (13)

A ground hole 10 formed in the ground;
A heat pump (20) installed on the ground around the tearing hole and including a compressor, a load side heat exchanger connected to the compressor, an expansion side connected to the load side heat exchanger, and a heat source side heat exchanger connected to the expansion side and the compressor;
An in-air heat exchanger (30) installed inside the tearing hole to recover the heat of groundwater and supply the heat to the heat pump;
A heat medium circulation means connected to the in-air heat exchanger and the heat source side heat exchanger of the heat pump through the heat medium supply pipe 52 and the heat medium return pipe 53 for performing heat exchange between the heat pump and the internal heat exchanger through circulation of the heat medium 50), wherein the in-air heat exchanger is a separate heat exchanger for recovering the heat of the ground water through the heat medium circulation means and then supplying the heat to the heat source side heat exchanger of the heat pump, wherein the upper and lower chambers, And a plurality of heat exchange tubes formed between the upper and lower chambers so as to communicate with the upper and lower chambers and exchange heat between the ground water and the heating medium, wherein groundwater flows through the plurality of heat exchange tubes connecting the upper chamber and the lower chamber Exchanges heat with the heating medium and is collected in the lower chamber or the upper chamber And the geothermal heat is returned to the geothermal heat exchanger. delete A ground hole 10 formed in the ground;
A heat pump (20) installed on the ground around the tearing hole and including a compressor, a load side heat exchanger connected to the compressor, an expansion side connected to the load side heat exchanger, and a heat source side heat exchanger connected to the expansion side and the compressor;
An in-air heat exchanger (30) installed inside the tearing hole to recover the heat of groundwater and supply the heat to the heat pump;
A heat medium circulation means connected to the in-air heat exchanger and the heat source side heat exchanger of the heat pump through the heat medium supply pipe 52 and the heat medium return pipe 53 for performing heat exchange between the heat pump and the internal heat exchanger through circulation of the heat medium 50);
A casing installed inside the tearing hole and having the inside air heat exchanger installed therein;
And the upper and lower portions of the in-air heat exchanger are installed in the upper and lower portions of the casing, respectively, with reference to the in-air heat exchanger, so that the aquifers on one side of the in-air heat exchanger serve as water supply layers, Means,
The in-air heat exchanger is a separate heat exchanger that recovers the heat of the groundwater through the heat medium circulation means and then supplies the heat to the heat source side heat exchanger of the heat pump. The heat exchanger includes upper and lower chambers isolated from the upper and lower parts, And a plurality of heat exchange tubes formed to communicate with the upper and lower chambers and allowing heat exchange between the groundwater and the heating medium, wherein groundwater flows through the plurality of heat exchange tubes connecting the upper chamber and the lower chamber, And the air is collected in the lower chamber or the upper chamber, and is then returned to the geothermal heat exchanger.
delete [4] The apparatus according to claim 3, further comprising: an upper portion of the air-to-air heat exchanger and disposed below the flow-through of the casing, wherein the heat pump is directly connected to the heat pump or is connected through the heating medium, And a water heat exchanger for heat exchange with groundwater falling from the upper portion using the heat. The geothermal system as set forth in claim 1 or 3, wherein the in-air heat exchanger includes a body in which the upper and lower chambers and the heat exchange pipe are formed.
delete The heat exchanger according to any one of claims 1 to 3, further comprising a heating medium storage means for storing a heating medium of the heating medium circulation means, and the heating medium storage means and the heat pump are connected by a pipe, A geothermal system consisting of exchangers. The groundwater circulating means includes a water supply pump (41), a groundwater pump (41) for supplying groundwater pumped by the water supply pump to the groundwater circulation means (40) A water return pipe (43) connected to the water supply pipe to return the ground water heat-exchanged with the heat medium in the air heat exchanger to the inside of the tearing hole, a water return pipe (43) connected to the water return pipe Wherein the groundwater and the groundwater to be circulated are separated and circulated by the aquifer. [7] The apparatus of claim 6, wherein the groundwater pumped by the water supply pump is discharged through the lower chamber, divided into a plurality of heat exchange tubes and collected into the upper chamber, and then returned to the upper aquifer 13 through the water return pipe A geothermal system that constitutes an in-bore heat exchanger. [3] The apparatus of claim 1, further comprising: a casing installed inside the tearing hole and having the inside air heat exchanger installed therein; And a drain water heat exchanger formed on an upper portion of the in-hole heat exchanger and performing heat exchange with groundwater that drips through the flow-through of the casing. The geothermal system as set forth in claim 5, further comprising a water inducing portion for guiding groundwater falling between the casing and the tearing hole to the water fall heat exchanger inside the casing through the water flow of the casing. [12] The geothermal system according to claim 9, wherein the logarithmic interlayer partitioning means is a circulating diaphragm or a shielding packer or a combination of a circulating diaphragm and a shielding packer.

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