KR20170007597A - Pipe for exchanging geothermal heat - Google Patents

Pipe for exchanging geothermal heat Download PDF

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Publication number
KR20170007597A
KR20170007597A KR1020150097584A KR20150097584A KR20170007597A KR 20170007597 A KR20170007597 A KR 20170007597A KR 1020150097584 A KR1020150097584 A KR 1020150097584A KR 20150097584 A KR20150097584 A KR 20150097584A KR 20170007597 A KR20170007597 A KR 20170007597A
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South Korea
Prior art keywords
circumferential surface
fluid
along
inner circumferential
geothermal
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KR1020150097584A
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Korean (ko)
Inventor
민철기
문선
김도경
백태연
정대교
김미래
박성구
이준석
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주식회사 한국피이엠
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Priority to KR1020150097584A priority Critical patent/KR20170007597A/en
Publication of KR20170007597A publication Critical patent/KR20170007597A/en

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    • F24J3/08—
    • F24J3/081—
    • F24J2003/087—
    • 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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  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A geothermal exchange pipe is disclosed.
The geothermal exchange pipe of the present invention is a geothermal heat exchange pipe embedded in the ground and provided with a fluid transfer pipe for heat exchange with the geothermal heat. And a spiral rib provided on the inner circumferential surface of the body in a spiral shape along the longitudinal direction of the body to generate a vortex in the inner fluid.
According to the present invention, it is possible to provide a sufficient amount of heat exchange between the fluid and the underground by increasing the residence time of the fluid as the spiral vortex is generated by providing the spiral rib on the inner circumferential surface of the body.

Description

{PIPE FOR EXCHANGING GEOTHERMAL HEAT}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a geothermal heat exchange pipe, and more particularly, to a geothermal heat exchange pipe that increases the residence time of a fluid flowing along a vertical pipe in a pipe or increases a thermal contact area with an underground heat, To the geothermal exchange pipe.

As we all know, geothermal energy is a generic term for earth's thermal energy, but recently geothermal energy is often used to refer to the heat of the earth that can be discovered, developed, or developed by humans. The origin of geothermal heat is about 83% due to the collapse of radioactive isotopes inside the crust and mantle, about 17% due to the release of mantle and its lower heat, It is estimated that about 40% of the geothermal heat in the surface is due to crust.

Technology for utilizing geothermal energy resources can be classified into power generation (indirect use) technology using geothermal fluid (steam and geothermal water) at 150 ° C or more and direct utilization technology using geothermal water at a lower temperature for district heating. In recent years, geothermal heating and cooling systems, which collect heat from geothermal heat that maintains a relatively constant temperature in the ground within a depth of 300 m and convert it into effective energy and utilize it as a system for heating and cooling the building and for hot water supply, are also classified.

Unlike geothermal power generation, which uses geothermal water at high temperature, the geothermal heating and cooling system is a highly efficient, environmentally friendly system that solves both heating and cooling simultaneously by using an underground heat source (15 ± 5 ℃) Is the most efficient way to use geothermal energy resources in the same region as Korea.

The geothermal heating and cooling system uses the principle of absorbing the warmest heat in the winter and heating it in the summer and the heat of the room in the cold in the summer. In order to increase the desired temperature and efficiency, Use a heat pump.

On the other hand, according to the installation method of the heat exchange pipe serving as the heat exchanger, the heat exchange system is classified into vertical type, horizontal type, surface type, ground type. In case of vertical type, pipe is buried vertically to the depth of about 200m under the ground, and it is the most installed type in Korea.

Such a vertical pipe is generally made of a straight tube. Since the fluid flowing along the inside flows straight without any obstacle, the circulation speed of the fluid is too fast, and sufficient heat exchange can not be performed. Accordingly, conventionally, in order to increase the heat exchange efficiency, the construction depth of the heat exchange pipe for geothermal cooling and heating is inevitably deepened to 200 m or more under the ground, and the cost of the raw material is increased accordingly.

Korean Patent Publication No. 10-2010-0085432 (published on July 29, 2010)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems of the prior art, and it is an object of the present invention to increase the residence time of a fluid flowing along a vertical pipe in a pipe or increase a thermal contact area with the underground heat, And a plurality of geothermal heat exchanger pipes.

The objects of the present invention are not limited to those mentioned above, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a geothermal exchange pipe embedded in a ground and provided with a fluid conveyance pipe for heat exchange with the geothermal heat, the geothermal exchange pipe comprising: a straight pipe-shaped body; And a spiral rib provided on an inner circumferential surface of the body in a spiral shape along the longitudinal direction of the body to generate a vortex in the inner fluid.

The helical ribs may be provided to be spaced from each other along the circumferential direction of the inner circumferential surface of the body.

The helical ribs may be provided such that at least one of opposite sides of the helical rib is tapered with respect to the inner circumferential surface of the body.

The helical rib may be formed so that its width gradually increases from one side contacting the inner circumferential surface of the body to the other side.

The helical rib may be formed so that the width gradually decreases from one side contacting the inner circumferential surface of the body to the other side.

And an outwardly bent bent portion may be provided at the upper end of the helical ribs which are most distant from the inner circumferential surface of the body.

And a plurality of barriers spaced apart from each other along the longitudinal direction of the body and protruding from the inner circumferential surface of the body in the radial direction of the body.

The protrusion height of the plurality of barriers may gradually increase along the fluid flow advancing direction in the body.

The end portions of the plurality of barriers may be provided with a bending connection portion that is bent in a direction opposite to the fluid flow advance direction in the body.

The plurality of barriers may be inclined toward the direction opposite to the direction of the flow of the fluid in the body.

The inclination angle of the plurality of barriers may gradually increase along the fluid flow advancing direction in the body.

The pitch of the helical ribs may be 1 to 10 times the inner diameter of the body, and the height and thickness of the helical ribs may be 1 to 5 times the thickness of the body.

The outer circumferential surface of the body may have a spiral groove along the longitudinal direction of the body, and may have the same shape at a position corresponding to the position where the spiral rib is formed.

Wherein a plurality of helical ribs are provided so as to be spaced apart from each other along a circumferential direction of the inner circumferential surface of the body, a plurality of helical grooves are provided so as to be spaced apart from each other along a circumferential direction of the outer circumferential surface of the body, Or the like.

The spiral rib may be provided with a plurality of through holes to penetrate both side surfaces thereof.

The spiral rib includes a first region formed to rotate clockwise along the longitudinal direction of the body and a second region connected to the first region and configured to rotate counterclockwise along the longitudinal direction of the body And the first region and the second region may be alternately repeated a plurality of times.

According to the present invention, a spiral rib is provided on the inner circumferential surface of the body to increase the residence time of the fluid as the spiral vortex is generated, thereby enabling sufficient heat exchange between the fluid and the underground heat.

In addition, a plurality of barriers are provided on the inner circumferential surface of the body so as to be spaced apart from each other along the longitudinal direction, and the protrusion height of the barrier and the inclination angle inclined with respect to the inner circumferential surface of the body are varied in various sections of the pipe, The time can be further increased.

In addition, by providing the helical groove so as to correspond to the helical rib on the outer circumferential surface of the body, heat can be uniformly transferred to the fluid side at any portion of the pipe.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a state diagram showing a state in which a geothermal exchange pipe according to the present invention is installed.
2 is a perspective view and a front view showing a geothermal exchange pipe according to a first embodiment of the present invention.
3 is a cross-sectional view showing another example of the geothermal exchange pipe according to the first embodiment of the present invention.
4 is a front view showing still another example of the geothermal exchange pipe according to the first embodiment of the present invention.
5 and 6 are graphs showing the results of measurement of the heat transfer coefficient using the geothermal exchange pipe according to the first embodiment of the present invention.
7 is a cross-sectional view showing a geothermal exchange pipe according to a second embodiment of the present invention.
8 and 9 are sectional views showing a geothermal exchange pipe according to a third embodiment of the present invention.
10 is a perspective view showing a geothermal exchange pipe according to a fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout.

A geothermal exchange pipe (hereinafter, referred to as 'pipe') according to a preferred embodiment of the present invention is formed in the shape of an intrinsic pipe which is embedded in the ground and has a fluid conveyance path for heat exchange with the geothermal heat so that heat can be exchanged between the fluid and the geothermal heat.

2 is a perspective view and a front view showing a geothermal heat exchange pipe according to a first embodiment of the present invention. FIG. 3 is a cross-sectional view of a geothermal exchange pipe according to a first embodiment of the present invention. FIG. 4 is a front view showing still another example of the geothermal heat exchange pipe according to the first embodiment of the present invention, and FIGS. 5 and 6 are cross sectional views showing the first embodiment of the present invention And the heat transfer coefficient is measured using a geothermal exchange pipe according to the following formula.

FIG. 1 shows a geothermal exchange apparatus including a pipe 100 according to an embodiment of the present invention. The geothermal exchange apparatus includes a plurality of pipes 100 as a transfer pipe of fluid supplied from the ground and buried in the ground so as to be perpendicular to the ground surface and a plurality of pipes 100 And a geothermal heat recovery pipe 150 for discharging the fluid heat exchanged with the geothermal heat to the ground. Although the plurality of pipes 100 are shown as a single bundle in the drawing, the present invention is not limited thereto, and a plurality of bundles may be provided so as to be spaced apart from each other and each bundle may be configured to communicate with the geothermal heat recovery pipe 150 have.

Hereinafter, the pipe 100, which is a characteristic part of the present invention, will be described with reference to various embodiments.

As shown in FIG. 2, the pipe 100 according to the first embodiment of the present invention can be manufactured through an extrusion process. The pipe 110 includes a straight pipe-shaped body 110, a body 110 And a spiral rib 120 provided in a spiral shape along the longitudinal direction of the inner fluid to generate a vortex in the inner fluid.

First, the body 110 has a straight pipe shape having an outer diameter and an inner diameter, and a fluid such as water flows as a medium for heat exchange with the geothermal heat. The body 110 may be made of PB, PE, HDPE, ABS, PP, HIPS, or the like.

Next, the helical ribs 120 are provided on the inner circumferential surface of the body 110 so as to protrude spirally along the longitudinal direction thereof. Accordingly, while the fluid flows along the inside of the body 110, the fluid is lowered while generating a spiral vortex due to the shape of the helical ribs 120. In this case, the fluid can stay in the unit length section of the body 110 for a longer time relative to the case where the spiral rib 120 is not provided, and it is possible to absorb a large amount of energy of the geothermal heat do.

In this embodiment, since the fluid contacts the inner circumferential surface of the body 110 and the outer surface of the helical rib 120 in the body 110 to exchange heat with the geothermal heat, heat exchange efficiency is increased according to the increase of the contact area .

When the pipe 100 is installed perpendicularly to the ground, the outer shape may be deformed due to the pressure of the gravel embedded in the ground. The spiral rib 120 is formed on the inner surface of the body 110, It is possible to prevent the shape of the body 110 from being deformed by gravel or the like.

3, the plurality of helical ribs 120 may be spaced apart from one another along the circumferential direction of the inner circumferential surface of the body 110. As shown in FIG.

In the case where the plurality of helical ribs 120 are provided as described above, the fluid eddy current intensity in the body 110 is further increased to cause an increase in residence time, and an increase in contact area for heat exchange with the geothermal heat There is an advantage that the heat exchange efficiency is increased.

4, at least one of opposite side surfaces of the helical ribs 120 is tapered against the inner circumferential surface of the body 110 in order to smoothly flow the fluid in the body 110, as shown in FIG. .

For example, as shown in Fig. 4 (a), the helical rib 120 may be provided so that its width gradually decreases from one side contacting the inner peripheral surface of the body 110 to the other side.

When the spiral rib 120 is provided in such a cross-sectional shape, the fluid not only generates a spiral vortex while flowing along the spiral structure of the spiral rib 120, but also causes the inclined first side of the spiral rib 120 Accordingly, the residence time in the body 110 increases with the increase of the vortex intensity, and the heat exchange efficiency can be further increased.

The bent portion 121 may be formed at the upper end of the spiral rib 120, which is the most distant from the inner circumferential surface of the body 110. It is preferable that the bending portion 121 is provided to extend from the upper end of the spiral rib 120 to both the left and right sides so that the spiral vortex can be generated more efficiently. Accordingly, this embodiment minimizes mixing between fluid particles that are in close contact with the helical ribs 120 or in contact with the left and right sides of the helical ribs 120 when viewed in the direction of the central axis of the body 110 The vortex intensity can be increased.

As another example, as shown in Fig. 4 (b), the spiral rib 120 may be provided so that its width gradually increases from one side contacting the inner circumferential surface of the body 110 to the other side.

If the spiral ribs 120 are provided in such a cross-sectional shape, the fluid will also generate a spiral vortex while flowing along the spiral structure of the spiral rib 120, similar to that described above, The mixing of the fluid particles flowing in a state of being in contact with the left and right side surfaces of the helical ribs 120 is minimized and the vortex intensity can be further increased. Here, the above-mentioned bending portion 121 may be provided at the upper end of the spiral rib 120, and the advantages generated by the bending portion 121 are the same as described above.

In the embodiment of the present invention, as shown in Fig. 4, the spiral rib 120 may further include a plurality of through holes 122 to penetrate both sides thereof.

The through hole 122 is a kind of flow path that allows mixing between fluid particles that are in close contact with the spiral rib 120 or in contact with the left and right sides of the spiral rib 120. The through hole 122 The flow residence time is increased through the flow interfering effect caused by mixing with each other, so that heat exchange efficiency can be further increased.

Hereinafter, experimental results for comparing heat transfer characteristics in a case where a spiral rib 120 is provided in a single row on a body 110 and in a general case where a spiral rib is not provided will be described.

5 is a graph showing the heat transfer coefficient according to the height and thickness of the spiral rib 120 in a state where the pitch of the spiral rib 120 is set to 50.2 mm. And a heat transfer coefficient according to a pitch change of the spiral rib 120 in a state where the pitch of the spiral rib 120 is set to 4.9 mm.

5 and 6, it can be seen that the pipe 100 provided with the spiral rib 120 has a higher heat transfer coefficient than the smooth pipe without the spiral rib 120 to be compared.

In particular, it can be seen from FIG. 5 that the height and thickness of the helical ribs 120 exhibit a relatively high heat transfer coefficient in a section having 1/5 to 1/6 of the pitch, 120) exhibits a relatively high heat transfer coefficient in a section having a height and a thickness of 1/20 to 1/10 of the thickness.

As the height and thickness of the spiral rib 120 increase, the pressure drop in the body 110 increases due to the increased vortex intensity occurring in the body 110. As the pitch of the spiral rib 120 increases, The pressure drop is reduced due to the weakening of the strength. That is, the height, thickness, and pitch of the helical ribs 120 have opposing effects on the pressure drop.

The Applicant has found that the pitch of the helical ribs 120 is set to be 1 to 20 times the inner diameter of the body 110 and the height and thickness of the helical ribs 120 can be adjusted 110) thickness (the distance between the outer surface and the inner circumferential surface) is set to be 1 to 5 times, which is an optimum value.

7 is a cross-sectional view showing a geothermal exchange pipe according to a second embodiment of the present invention.

Hereinafter, a pipe according to a second embodiment of the present invention will be described. Repeated explanations of the construction overlapping with the first embodiment will be omitted, and the same reference numerals beginning with 200 will be used for the same structure.

7, in the second embodiment of the present invention, the helical rib 220 includes a first region A formed to rotate clockwise along the longitudinal direction of the body 210, And a second region B connected to the region A and configured to rotate counterclockwise along the longitudinal direction of the body 210. Here, 'clockwise and counterclockwise' means the rotation of the spiral vortex and the direction of rotation of the spiral rib 220 when the operator looks at the body 210 in the direction of the central axis thereof.

For example, the spiral rib 220 is provided so as to rotate in a clockwise direction in a section where one pitch is provided, that is, in the first area A, and a section provided with the next pitch to be connected with the pitch, ) Is provided to rotate counterclockwise.

Thus, the fluid rotates clockwise while passing through the first region A and counterclockwise in the second region B. In other words, a rotational force for reversing the rotational direction of the fluid currently in progress is generated in the connection region between the first region A and the second region B, and thus a stronger vortex is generated in the connection region . The present embodiment can increase the fluid retention time in the body 210 by increasing the eddy current intensity occurring in a specific portion of the pipe 200 and thereby improve the heat exchange efficiency between the fluid and the geothermal heat .

Although the first region A and the second region B are provided one by one in the drawing, the present invention is not limited to this, and may be formed by alternately repeating a plurality of times corresponding to the length of the pipe 200.

8 and 9 are sectional views showing a geothermal exchange pipe according to a third embodiment of the present invention.

Hereinafter, a pipe according to a third embodiment of the present invention will be described. Repeated explanations of the construction overlapping with the first embodiment will be omitted, and the same reference numerals beginning with 300 will be used for the same construction. Further, the pipe according to the third embodiment of the present invention may be provided including the contents described in the second embodiment, and a duplicate description thereof will be omitted.

8 and 9, the pipe 300 according to the third embodiment of the present invention is provided to be spaced apart from each other along the longitudinal direction of the body 310, 310 which are radially outwardly protruding from the outer circumferential surface. Here, the plurality of barriers 330 are each formed in the shape of a disc. These plurality of barriers 330 are provided for the purpose of increasing the fluid retention time by lowering the fluid flow pressure within the body 310 within an allowable range.

The pipe 300 according to the present embodiment is embedded in the ground up to several hundreds of meters to several hundred meters. Since the ground temperature difference is generated according to the depth of the ground, There is a need to increase the fluid residence time relatively quickly at a certain depth section and to flow the fluid quickly.

For this, in the third embodiment of the present invention, as shown in FIG. 8, the plurality of barriers 330 are provided so that the protruding height gradually increases along the fluid flow advancing direction in the body 310.

In other words, for example, in the case of summer, the depth of the ground is gradually lowered down to the ground. In order to increase mutual heat exchange efficiency between the heat of the ground and the fluid having a relatively low temperature, it is necessary to further increase the residence time of the fluid in the pipe 300 located at a deep position in the ground. In this embodiment, as described above, by applying the protrusion height of the barrier 330 differently according to the section of the pipe 300, the fluid can be applied to the upper and lower sides of the installation section of the pipe 300 So that it can pass therethrough with a relatively long residence time. When this structure is applied, for example, a fluid having a lower temperature due to heat exchange with the geothermal heat can be obtained in summer, and a fluid having higher temperature can be obtained by heat exchange with the geothermal heat in winter.

8, a bending connection portion 331 is provided at the ends of the plurality of barriers 330 and is bent toward the direction opposite to the direction of fluid flow in the body 310 .

The bending connection portion 331 is provided for the purpose of increasing the fluid retention time by lowering the fluid flow pressure within an allowable range as in the case of the barrier 330. The bending connection portion 331 is formed by connecting the pipe 300 through the bending connection portion 331, It is possible to increase the residence time by decreasing the flow rate of the fluid passing through a desired section of the geothermal fluid (for example, a section located at a deep position in the ground), so that the heat exchange efficiency between the geothermal fluid and the fluid can be increased as described above.

9, the plurality of barriers 330 are provided so as to be inclined in the direction opposite to the fluid flow advancing direction in the body 310, and the plurality of barriers 330 are provided in the body 310 The inclination angle alpha along the fluid flow advancing direction is gradually increased.

The structure in which the barrier 330 is inclined and the inclination angle is changed along the section of the pipe 300 is also provided for the purpose of increasing the fluid retention time by lowering the fluid flow pressure within the allowable range.

The present embodiment increases the residence time by reducing the flow rate of the fluid passing through a desired section of the pipe 300 (for example, a section located at a deep position in the ground) through the inclined structure of the barrier 330 and the inclination angle changing structure The heat exchange efficiency between the geothermal heat and the fluid can be increased as described above.

10 is a perspective view showing a geothermal exchange pipe according to a fourth embodiment of the present invention.

Hereinafter, a pipe according to a fourth embodiment of the present invention will be described. Repeated explanations of the construction overlapping with the first embodiment will be omitted, and the same reference numerals beginning with the 400th section will be used. Further, the pipe according to the fourth embodiment of the present invention may be provided including the contents described in the second and third embodiments, and a duplicate description thereof will be omitted.

10, in the fourth embodiment of the present invention, a spiral groove 440 is further formed on the outer circumferential surface of the body 410 along the longitudinal direction of the body 410. As shown in FIG. Here, it is preferable that they are provided in the same shape at positions corresponding to the positions where the helical ribs 420 are formed.

The helical grooves 440 are formed in a groove structure so that the contact area between the gravel and the like in the ground and the pipe 400 can be increased so that more underground heat is transmitted to the pipe 400, Lt; / RTI >

If the helical groove 440 is not provided, the thickness of the body 410 at the portion where the helical rib 420 is provided is formed to be relatively thicker than the remaining region where the helical rib 420 is not provided. The portion where the helical ribs 420 are provided has a relatively lower heat transfer efficiency than the other portions.

In this embodiment, the spiral grooves 440 are formed in the same shape at positions corresponding to the positions where the helical ribs 420 are formed, so that the thicknesses can be made uniform over the entire area of the pipes 400, So that heat can be uniformly transferred to the fluid side.

In the fourth embodiment of the present invention, although not shown in the drawing, a plurality of helical ribs 420 are provided so as to be spaced apart from each other along the circumferential direction of the inner circumferential surface of the body 410, and the helical groove 440 includes a body 410, And may be provided in the same shape at positions corresponding to the positions where the helical ribs 420 are formed.

With this structure, the present embodiment is able to uniformize the thickness throughout the entire area of the pipe 400 as described above, so that heat can be uniformly transferred to the fluid side from any portion of the pipe 400 . In addition, the present embodiment can increase the vortex generation intensity in the body 410 and increase the heat exchange efficiency as the residence time increases.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

100: pipe 120: spiral rib
121: bending section 122: through hole
330: Barrier

Claims (16)

1. A geothermal exchange pipe embedded in the ground and provided with a fluid conveying pipe for heat exchange with the geothermal heat,
A straight tube-shaped body; And
And a spiral rib provided on an inner circumferential surface of the body in a spiral shape along the longitudinal direction of the body to generate a vortex in the inner fluid. The method according to claim 1,
Wherein the helical ribs are spaced apart from each other along the circumferential direction of the inner circumferential surface of the body. The method according to claim 1,
Wherein the helical ribs are provided with a plurality of through holes so as to penetrate both side surfaces thereof. The method according to claim 1,
Wherein at least one of the opposite side surfaces of the helical ribs is tapered with respect to an inner circumferential surface of the body. 5. The method of claim 4,
Wherein the helical ribs are formed to gradually increase in width from one side contacting the inner circumferential surface of the body to the other side. 5. The method of claim 4,
Wherein the helical ribs are provided such that their width gradually decreases from one side contacting the inner circumferential surface of the body to the other side. 7. The method according to any one of claims 4 to 6,
And a bent portion bent outward is provided at the upper end of the helical ribs which are most distant from the inner circumferential surface of the body. 5. The method according to any one of claims 1 to 4,
Further comprising a plurality of barriers spaced from each other along the longitudinal direction of the body and protruding from the inner circumferential surface of the body in a radial direction of the body. 9. The method of claim 8,
Wherein the plurality of barriers gradually increase in height of protrusion along the direction of fluid flow progression in the body. 9. The method of claim 8,
Wherein the plurality of barriers are provided at the ends thereof with a bending connection portion bent toward a direction opposite to the direction of the fluid flow in the body. 9. The method of claim 8,
Wherein the plurality of barriers are provided so as to be inclined toward a direction opposite to a flow direction of the fluid in the body. 12. The method of claim 11,
Wherein the plurality of barriers gradually increases in the inclined angle along the direction of fluid flow progression in the body. 5. The method according to any one of claims 1 to 4,
Wherein the pitch of the helical ribs is 1 to 10 times the inner diameter of the body, and the height and thickness of the helical ribs are 1 to 5 times the body thickness. 5. The method according to any one of claims 1 to 4,
Wherein a spiral groove is formed along the longitudinal direction of the body on the outer circumferential surface of the body, and the same shape is provided at a position corresponding to a position where the helical rib is formed. 15. The method of claim 14,
A plurality of helical ribs spaced from each other along a circumferential direction of the inner circumferential surface of the body,
Wherein the helical grooves are provided in a plurality of spaced apart from each other along the circumferential direction of the outer circumferential surface of the body, and are provided in the same shape at positions corresponding to the positions where the helical ribs are formed. 5. The method according to any one of claims 1 to 4,
The spiral rib includes a first region formed to rotate clockwise along the longitudinal direction of the body and a second region connected to the first region and configured to rotate counterclockwise along the longitudinal direction of the body In addition,
Wherein the first region and the second region are alternately repeated a plurality of times.
KR1020150097584A 2015-07-09 2015-07-09 Pipe for exchanging geothermal heat KR20170007597A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020071628A1 (en) * 2018-10-01 2020-04-09 한국해양대학교 산학협력단 Spirally heating submarine pipeline
KR20200078775A (en) * 2018-12-21 2020-07-02 주식회사 유니크 Hydrogen recirculation apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100085432A (en) 2009-01-20 2010-07-29 서울대학교산학협력단 Earth heat exchange pipe, earth heat exchange system and manufacturing method of the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100085432A (en) 2009-01-20 2010-07-29 서울대학교산학협력단 Earth heat exchange pipe, earth heat exchange system and manufacturing method of the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020071628A1 (en) * 2018-10-01 2020-04-09 한국해양대학교 산학협력단 Spirally heating submarine pipeline
KR20200037517A (en) * 2018-10-01 2020-04-09 한국해양대학교 산학협력단 Helical Trace Heating Flowline
US12049977B2 (en) 2018-10-01 2024-07-30 Korea Maritime University Industry-Academic Cooperation Foundation Spirally heating submarine pipeline
KR20200078775A (en) * 2018-12-21 2020-07-02 주식회사 유니크 Hydrogen recirculation apparatus

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