KR101322470B1 - Geothermal heat exchanger and heat exchange system using the same - Google Patents

Geothermal heat exchanger and heat exchange system using the same Download PDF

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Publication number
KR101322470B1
KR101322470B1 KR1020110129889A KR20110129889A KR101322470B1 KR 101322470 B1 KR101322470 B1 KR 101322470B1 KR 1020110129889 A KR1020110129889 A KR 1020110129889A KR 20110129889 A KR20110129889 A KR 20110129889A KR 101322470 B1 KR101322470 B1 KR 101322470B1
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South Korea
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heat exchange
heat
heat exchanger
geothermal
unit
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KR1020110129889A
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Korean (ko)
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KR20130063394A (en
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김필수
허남수
김인환
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유한회사 한마루에너지
김인환
허남수
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)

Abstract

The present invention relates to a geothermal heat exchanger and a heat exchange system using the same, wherein the geothermal heat exchanger communicates with an inlet pipe having a flow path through which a heat exchange medium flows, and communicates with the inlet pipe, so that the heat exchange medium can exchange heat with underground geothermal heat. The first unit pipes are connected in communication with each other and are sequentially arranged, and the adjacent first unit pipes have a heat exchanger formed so that the outer circumferential surface thereof is in contact with each other, It communicates with one unit pipe and has the discharge pipe extended upward.
The geothermal heat exchanger according to the present invention and the heat exchange system using the same have the advantage of improving heat exchange efficiency by increasing the heat contact area and heat contact time of the heat exchange medium to the geothermal heat by expanding the flow path through which the heat exchange medium flows underground.

Description

Geothermal heat exchanger and heat exchange system using same {Geothermal heat exchanger and heat exchange system using the same}

The present invention relates to a geothermal heat exchanger and a heat exchange system using the same, and more particularly, to a geothermal heat exchanger and a heat exchange system using the same by using geothermal heat such as underground air and groundwater.

In general, energy used for cooling and heating uses fossil fuel, or fossil fuel or power energy produced by using nuclear power. However, the fossil fuel is used to control water quality and environment due to various pollutants generated during combustion. Recently, development of alternative energy is actively progressed due to the disadvantage of polluting and the increase of unit cost due to resource limitation.

Among these alternative energies, research on wind energy, solar heat, geothermal energy, etc., which have infinite energy, and air-conditioning devices using them are used. These energy sources have the advantage of obtaining energy with little effect on air pollution and climate change. The disadvantage is that the energy density is very low.

In particular, in order to obtain energy using wind and solar heat, a large area must be secured along with the limit of the installation site, and energy production due to environmental variability may not always be constant. In addition, installation and maintenance are expensive.

Therefore, a constant energy can be obtained at all times, and a lot of air-conditioning and heating devices using geothermal energy, which is relatively inexpensive to install and maintain, are used. This is a technology that uses geothermal energy of a constant underground temperature.

Commonly used geothermal heating and cooling device is composed of a geothermal heat exchanger for recovering geothermal heat and a heat pump to move the recovered geothermal heat to a necessary place to perform the cooling and heating.

The installation of the geothermal heat exchanger drills the bore-holes 50m ~ 200m deep at a predetermined interval, inserts the geothermal heat exchanger into each of the excavated boreholes, and then interconnects the adjacent geothermal heat exchangers. After that, install them by connecting them with a heat pump. Each bore hole installed in the geothermal heat exchanger is filled with soil and then grouted.

In general, the geothermal heat exchanger is provided with a heat exchanger tube extending in the vertical direction to enter the bore hole. However, since the heat exchanger tube is formed to extend in a straight line, the heat contact area and thermal contact time with respect to geothermal heat are limited, so the heat exchange efficiency is low.

The present invention has been made to improve the above problems, to provide a geothermal heat exchanger having a heat exchanger tube formed so as to extend the thermal contact area and the thermal contact time of the heat exchange medium to underground geothermal heat and a heat exchange system using the same. Its purpose is to.

The geothermal heat exchanger according to the present invention for achieving the above object is in communication with the inlet pipe, the inlet pipe is provided with a flow path through which the heat exchange medium flows, and the base heat exchange medium is introduced into the base to heat exchange with the underground geothermal heat It is to be connected in communication with each other, and having a plurality of first unit pipes arranged sequentially, adjacent first unit pipes and the heat exchange portion formed so that the outer peripheral surface is in contact with each other, the outermost located from the inlet pipe Communicating with the first unit pipe, the discharge pipe extending upward.

The first unit pipes are arranged along the up and down direction, and are formed to extend in parallel to each other in a direction crossing the array direction, and are connected in communication so that the flow path through which the heat exchange medium flows is formed in a zigzag shape.

On the other hand, the discharge pipe according to another embodiment of the present invention is sequentially arranged along the vertical direction, extending parallel to the extending direction of the first unit pipe, the flow path through which the heat exchange medium flows is formed in a zigzag shape It is provided with a plurality of second unit pipes connected in communication with each other, the adjacent second unit pipes are formed so that the outer peripheral surface is in contact with each other.

In addition, the discharge pipe according to another embodiment of the present invention is sequentially arranged along a direction parallel to the extending direction of the first unit pipe, extends in a direction crossing the extension direction of the first unit pipe, The flow path through which the heat exchange medium flows is provided with a plurality of second unit pipes connected to each other so as to be formed in a zigzag shape, and the collected second unit pipes are formed so that the outer circumferential surfaces thereof are in contact with each other.

On the other hand, the first unit pipes according to another embodiment of the present invention are arranged in an up and down direction, is formed in an annular shape so that the flow path through which the heat exchange medium flows in a spiral form, the discharge pipe is the first unit pipe It is preferable that it is formed so as to extend upward through the spiral center portion of the field.

In addition, the discharge pipes according to another embodiment of the present invention are arranged sequentially in the vertical direction, communicate with each other, a plurality of second unit pipes formed in an annular shape so that the flow path through which the heat exchange medium flows spirally provided It is provided with, the adjacent second unit pipes are formed so that the outer peripheral surface is in contact with each other.

On the other hand, the heat exchange system using a geothermal heat exchanger according to the present invention is to be introduced into the basement to heat exchange the heat exchange medium with the underground geothermal heat, there is provided a flow path through which the heat exchange medium flows, are connected to each other, sequential It includes a plurality of first unit pipes arranged in a row, adjacent adjacent first unit pipes and the outer peripheral surface formed so as to contact with each other, and a supply unit for supplying the heat exchange medium to the geothermal heat exchanger;

The supply unit includes a heat exchange chamber accommodating the heat exchange medium therein, a supply pipe and a return pipe connecting the geothermal heat exchanger and the heat exchange chamber, and a circulation pump installed in the supply pipe or the return pipe to pump the heat exchange medium. It is preferable.

According to another embodiment of the present invention, a heat exchange system using a geothermal heat exchanger includes a first heat exchanger installed in the heat exchange chamber to exchange heat with the heat exchange medium, a second heat exchanger to heat exchange with a heating object, and the first and second heat exchanges. To the first and second refrigerant circulation pipes through which refrigerant flows, an expansion valve installed in the first refrigerant circulation pipe to control the flow of the refrigerant, and a second refrigerant circulation pipe. It further comprises a heat pump unit provided with a compressor and a four-way valve is installed.

The geothermal heat exchanger according to the present invention and the heat exchange system using the same have the advantage of improving heat exchange efficiency by increasing the heat contact area and heat contact time of the heat exchange medium to the geothermal heat by expanding the flow path through which the heat exchange medium flows underground.

1 is a circuit diagram of a heat exchange system using a geothermal heat exchanger according to an embodiment of the present invention,
2 is a perspective view of the geothermal heat exchanger of the heat exchange system of FIG.
3 is a perspective view of a geothermal heat exchanger according to another embodiment of the present invention;
Figure 4 is a perspective view of a geothermal heat exchanger according to another embodiment of the present invention,
5 is a perspective view of a geothermal heat exchanger according to another embodiment of the present invention;
6 is a perspective view of a geothermal heat exchanger according to another embodiment of the present invention.

Hereinafter, a geothermal heat exchanger and a heat exchange system using the same according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 illustrate a heat exchange system 100 using a geothermal heat exchanger 110 according to an embodiment of the present invention.

Referring to the drawings, the heat exchange system 100 using a geothermal heat exchanger is provided with a geothermal heat exchanger 110 is introduced into the ground, and the supply unit 200 for supplying a heat exchange medium to the geothermal heat exchanger (110).

The geothermal heat exchanger (110) is an inlet pipe (120) provided with a flow path through which a heat exchange medium flows, and the heat exchanger is connected to the inlet pipe (120), and the heat exchanger is introduced into the basement so as to exchange heat with the underground geothermal heat. The unit 130 and a discharge pipe 140 for discharging the heat exchange medium passing through the heat exchange unit 130 to the outside.

The inlet pipe 120 is connected to the supply pipe of the supply unit 200 which will be described later to allow the heat exchange medium to flow from the supply unit 200, and is formed as a pipe extending a predetermined length in the vertical direction.

The heat exchange part 130 is connected in communication with each other, is arranged in the vertical direction sequentially, and has a plurality of first unit pipes 131 extending in a direction crossing the array direction. At this time, the adjacent first unit pipes 131 are connected to each other so that end portions thereof may communicate with each other so that a flow path through which the heat exchange medium flows may be formed in a zigzag shape.

In addition, adjacent first unit pipes 131 are formed to be in contact with each other so that a plurality of unit pipes can be introduced into the bore hole formed in the ground. The first unit pipe 131 of the uppermost side is in communication with the inlet pipe 120, the heat exchange medium introduced through the inlet pipe 120 flows through the zigzag flow path formed by the first unit pipe (131) Heat exchange with underground geothermal

As mentioned above, since the heat exchanger 130 provides a zigzag flow path, the heat exchanger 130 has an advantage of improving heat exchange efficiency by increasing the heat contact area and heat exchange time of the heat exchange medium.

The discharge pipe 140 communicates with an end of the lowermost first unit pipe 131 and extends vertically upwardly so that the heat exchange medium passing through the heat exchange part 130 flows to the ground.

On the other hand, Figure 3 is shown the discharge pipe 150 according to another embodiment of the present invention.

Elements having the same functions as those in the previous drawings are denoted by the same reference numerals.

Referring to the drawings, the discharge pipe 150 is sequentially arranged in the vertical direction, and has a plurality of second unit pipes 151 communicating with each other.

The second unit pipes 151 are formed to extend in parallel with the extending direction of the first unit pipe 131, and the ends of the second unit pipes 151 are connected to each other so that the flow path through which the heat exchange medium flows is formed in a zigzag shape. In addition, the adjacent second unit pipe 151 is preferably formed so that the outer peripheral surface is in contact with each other.

As mentioned above, the discharge pipe 150 composed of the second unit pipes 151 provides a zigzag flow path so that when the heat exchange medium passing through the heat exchanger 130 moves to the ground, the heat contact time and heat for the geothermal heat There is an advantage of increasing the contact area to increase the heat exchange efficiency.

4 illustrates another embodiment of the discharge pipe 160.

Referring to the drawings, the discharge pipe 160 is sequentially arranged along the direction parallel to the extending direction of the first unit pipe 131, and has a plurality of second unit pipes 161 communicating with each other.

The second unit pipes 161 extend in a direction orthogonal to an extension direction of the first unit pipe 131 so as to maintain a lattice structure with respect to the first unit pipes 131, and a flow path through which the heat exchange medium flows. The ends are respectively connected in communication so as to form a zigzag shape. Also. Adjacent second unit pipes 161 are preferably formed so that the outer peripheral surface is in contact with each other.

As mentioned above, since the discharge pipe 160 including the second unit pipes 161 provides a zigzag flow path, the heat exchange medium and the geothermal heat exchange time are extended to improve heat exchange efficiency.

On the other hand, Figure 5 shows a heat exchanger 170 according to another embodiment of the present invention.

Referring to the drawings, the heat exchanger 170 is arranged in the vertical direction, and has a plurality of first unit pipes 171 formed in communication with each other. The first unit pipes 171 may be formed in an annular shape so that a flow path through which the heat exchange medium flows may be provided in a spiral shape.

At this time, the discharge pipe 172 is in communication with the lowermost first unit pipe 171, is formed to extend vertically upward through the spiral center portion of the first unit pipe (171). The heat exchange medium introduced into the heat exchange unit 170 through the inflow pipe 120 passes through the plurality of first unit pipes 171 forming the spiral flow path, and then is discharged to the ground through the discharge pipe 172.

At this time, since the heat exchanger 170 provides a spiral flow path, the heat exchange area 170 and the heat contact time of the heat exchange medium with respect to geothermal heat are extended to improve heat exchange efficiency of the heat exchanger 170.

In addition, Figure 6 is shown in the discharge pipe 180 according to another embodiment of the present invention.

Referring to the drawings, the discharge pipe 180 is sequentially arranged in the vertical direction, and communicate with each other, the plurality of second unit pipes 181 formed in an annular shape so that the flow path through which the heat exchange medium flows can be provided in a spiral form. do. At this time, the adjacent second unit pipe 181 is preferably formed so that the outer peripheral surface is in contact with each other.

The heat exchange medium passing through the spiral flow path of the heat exchange part 170 flows to the ground along the flow path of the spiral formed by the second unit pipes 181 and exchanges heat again with the geothermal heat. In this case, since the discharge pipe 180 forms a spiral flow path, the heat contact area and the heat contact time of the heat exchange medium with respect to geothermal heat are extended to improve heat exchange efficiency.

The supply unit 200 is provided in the heat exchange chamber 211 containing the heat exchange medium, the supply pipe 213 and the return pipe 214 connecting the geothermal heat exchanger 110 and the heat exchange chamber 211, and the heat supply chamber 213 to exchange heat. A circulation pump 215 for pumping a medium and a heat pump unit 20 installed in the heat exchange chamber 211 to transfer heat supplied from the geothermal heat exchanger 110 to a heating target such as a facility house.

The heat exchange medium heated by heat exchange with geothermal heat through the geothermal heat exchanger 110 is supplied to the heat exchange chamber 211 through a supply pipe 213. The high temperature heat exchange medium introduced into the heat exchange chamber 211 exchanges heat with the first heat exchanger 22 of the heat pump unit 20 described later. As mentioned above, the first heat exchanger 22 absorbs a large amount of heat energy by exchanging heat with a high temperature heat exchange medium heated by geothermal heat, and thus heating efficiency of the second heat exchanger 21 of the heat pump unit 20 described later. To improve.

The heat pump unit 20 is installed in the heat exchange chamber 211 to heat exchange with the heat exchange medium, the first heat exchanger 22, the second heat exchanger 21 installed in the heating and cooling target, and the first and second heat exchanger Expansion of the first and second refrigerant circulation pipes (23, 24) and the first refrigerant circulation pipe (23), which controls the flow of the refrigerant, by connecting the (21, 22) to form a closed circuit and the refrigerant flowing therein The valve 26 and the compressor 25 and the four-way valve 27 provided in the 2nd refrigerant circulation pipe 24 are provided.

At a position adjacent to the second heat exchanger 21 installed outside of the heating and cooling target, a circulation fan may be installed so that the refrigerant passing through the second heat exchanger 21 can easily exchange heat with air outside the cooling and heating target. Do.

At this time, the second refrigerant circulation tube 24 mutually connects the first heat exchanger 21 and the compressor 25 with the first pipe member 28 and the second heat exchanger 22 and the compressor 25. A second pipe member 29 for connecting is provided.

Referring to the operation of the heat exchange system 100 using the geothermal heat exchanger 110 according to the present invention configured as described above in detail as follows.

The heat exchange medium accommodated in the heat exchange chamber 211 flows into the geothermal heat exchanger 110 through the supply pipe 213. The heat exchange medium introduced into the geothermal heat exchanger 110 flows along a zigzag or spiral flow path of the geothermal heat exchanger 110 and exchanges heat with underground geothermal heat. The heat exchange medium heated by geothermal heat is introduced into the heat exchange chamber 211 through the return pipe 214. The heat exchange medium is heated while circulating the heat exchange chamber 211 and the geothermal heat exchanger 110.

The high temperature heat exchange medium accommodated in the heat exchange chamber 211 heats the first heat exchanger 22 to heat the refrigerant. The refrigerant having a low temperature and low pressure gas evaporated by absorbing heat from the outside in the first heat exchanger 22 is introduced into the compressor 25 through the second pipe member 29. The low temperature low pressure refrigerant is compressed to be in a state of high temperature and high pressure by the compressor 25, and the high temperature high pressure refrigerant flows into the second heat exchanger 21 through the first pipe member 28.

On the other hand, the high temperature and high pressure refrigerant gas introduced into the second heat exchanger 21 releases heat to the inside of the heating and cooling target while exchanging heat with the internal air of the heating and cooling target. Here, the refrigerant is liquefied into a liquid state at low temperature and high pressure. The refrigerant having a low temperature and high pressure in the liquid state is passed through the expansion valve 26 through the first refrigerant circulation pipe 23 by the second heat exchanger 21, and the refrigerant is decompressed by the expansion valve 26 to reduce the temperature at low temperature. Becomes Refrigerant, which is in a low pressure state by the expansion valve 26, flows into the first heat exchanger 22 through the first refrigerant circulation pipe 23, and the refrigerant introduced into the first heat exchanger 22 receives external heat. Absorbed into a gaseous state of low temperature and low pressure flows into the compressor (25).

The geothermal heat exchanger and the heat exchange system 100 using the same according to the present invention configured as described above expand the flow path through which the heat exchange medium flows underground to increase the thermal contact area and the thermal contact time of the heat exchange medium against geothermal heat. There is an advantage to improve the efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

100: heat exchange system using geothermal heat exchanger
110: geothermal heat exchanger
120: inlet pipe
130: heat exchanger
131: first unit
140: discharge pipe
200: supply unit
211: heat exchange chamber
213: supply pipe
214: return pipe
215: circulation pump

Claims (9)

An inlet pipe having a flow path through which a heat exchange medium flows;
In communication with the inlet pipe, the heat exchange medium is introduced into the base so as to exchange heat with the underground geothermal heat, are connected in communication with each other, having a plurality of first unit pipes arranged in sequence, adjacent to the first The unit pipes and the heat exchange portion formed so that the outer peripheral surface is in contact with each other;
And a discharge pipe communicating with the first unit pipe located at the outermost part of the inflow pipe and extending upwardly.
The first unit pipes are arranged along the up and down direction, extend in parallel to each other in a direction crossing the array direction, are connected in communication so that the flow path through which the heat exchange medium flows is formed in a zigzag shape,
The discharge pipes are sequentially arranged along a direction parallel to the extension direction of the first unit pipe, extend in the vertical direction, and a plurality of second units connected in communication with each other such that a flow path through which the heat exchange medium flows is formed in a zigzag shape. Geothermal heat exchanger having a tube, the adjacent second unit tube is formed so that the outer peripheral surface is in contact with each other.
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KR1020110129889A 2011-12-06 2011-12-06 Geothermal heat exchanger and heat exchange system using the same KR101322470B1 (en)

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KR1020110129889A KR101322470B1 (en) 2011-12-06 2011-12-06 Geothermal heat exchanger and heat exchange system using the same

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101771645B1 (en) * 2016-12-28 2017-08-31 주식회사 에너솔라 Heatpump System Having The Heat Exchanger
KR101771646B1 (en) * 2016-12-28 2017-08-31 주식회사 에너솔라 Heatpump System
KR101771647B1 (en) * 2016-12-28 2017-08-31 주식회사 에너솔라 Heatpump Sequential Control Device Having The Heat Exchanger

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101340979B1 (en) * 2013-08-30 2013-12-13 김영근 Heating and cooling apparatus
WO2015050372A1 (en) * 2013-10-02 2015-04-09 김영선 System for generating electricity using compound heat sources
KR101462251B1 (en) 2013-10-08 2014-11-20 서울시립대학교 산학협력단 Underground Heat Exchange System

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100834005B1 (en) * 2007-03-29 2008-05-30 삼양에코너지 주식회사 Underwater heat exchanger
KR100967179B1 (en) * 2008-06-11 2010-07-05 한국건설기술연구원 Large Diameter Geo-heat Exchanger and Its Installation Method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100834005B1 (en) * 2007-03-29 2008-05-30 삼양에코너지 주식회사 Underwater heat exchanger
KR100967179B1 (en) * 2008-06-11 2010-07-05 한국건설기술연구원 Large Diameter Geo-heat Exchanger and Its Installation Method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101771645B1 (en) * 2016-12-28 2017-08-31 주식회사 에너솔라 Heatpump System Having The Heat Exchanger
KR101771646B1 (en) * 2016-12-28 2017-08-31 주식회사 에너솔라 Heatpump System
KR101771647B1 (en) * 2016-12-28 2017-08-31 주식회사 에너솔라 Heatpump Sequential Control Device Having The Heat Exchanger

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