KR101403687B1 - Geothermal heating and cooling system for heat exchanger - Google Patents

Abstract

The present invention relates to a geothermal heat exchange apparatus for a cooling and heating system, and, more specifically, to a geothermal heat exchange apparatus for a cooling and heating system, which allows the heat exchange of geothermal heat to be performed by branching multiple branch pipes off from a portion at which an inlet pipe and an outlet pipe meet each other, thereby improving heat exchange efficiency. According to the present invention, the geothermal heat exchange apparatus for a cooling and heating system comprises: a housing consisting of a body and a cover coupled thereto; a first branch unit and a second branch unit integrally having connection parts, and having branch main bodies with multiple connection through-holes; a first direction converting connection unit and a second converting connection unit which integrally have storage containers and pipe connection units, and which convert the flow direction of the heat medium; the branch pipes installed between the branch units and the direction converting connection units respectively; and a connection pipe connecting the first and the second direction converting connection units, wherein the body has a space filled with a heat medium; the cover has a coupling hole and a through-hole; the connection parts have an inlet pipe or an outlet pipe connected thereto; and the storage containers having connection through-holes corresponding to the connection through-holes of the branch units collect a distributed fluid.

Description

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

The present invention relates to a heat exchanger for a cooling / heating system using geothermal heat, and more particularly, to a heat exchanger for a cooling / heating system using geothermal heat, The present invention relates to a heat exchanger for a cooling / heating system using a geothermal heat.

Generally used domestic and industrial energy sources are fossil fuels such as petroleum and natural gas, or nuclear fuel. The use of such energy sources not only causes the main cause of environmental pollution but also has a limitation of the reserves. Alternative energy development is actively under way.

Generally, fossil fuels such as coal, oil, and natural gas are used as energy sources for heating and cooling, or electric energy produced by using these fossil fuels or nuclear power is mainly used.

However, since fossil fuels have a disadvantage of polluting the water quality and the environment due to various pollutants generated in the combustion process, in recent years, development of alternative energy capable of replacing them has been actively carried out.

Among these alternative energies, studies on wind power, solar heat, geothermal energy, etc., which have infinite energy sources, are being used, and these energy sources have the advantage of obtaining energy without affecting air pollution and climate change On the other hand, the energy density is very low.

In particular, in order to obtain energy using wind power and solar heat, it is necessary to secure a large area along with the limit of the installation site, and these devices have a low energy production capacity per unit device and a large installation and maintenance cost.

Geothermal energy, which is a part of alternative energy, is used for power generation by using high-temperature geothermal heat in deep underground, and it is applied to heating and cooling system using geothermal heat at 10 ~ 20 ℃. It is applied to heating and cooling technology It is possible to save energy by 40% or more compared with the conventional heating and cooling apparatus, and it is known that it can reduce the energy generation cost by 40 ~ 70%.

The geothermal heat pump system, which is an electric device using natural heat storage such as ground water for the purpose of cooling and heating the building using the geothermal heat, is equipped with a geothermal heat exchanger so that heat is released to the ground during the summer season by the heat exchanger, So that the cooling and heating performance is not lowered due to the geothermal temperature maintaining a substantially constant temperature at 10 to 20 ° C throughout the year, and stable operation is possible.

Therefore, there are many heating and cooling devices using geothermal energy that are relatively inexpensive to install and maintain. This is a technology using the thermal energy of the ground, which is 10 to 20 ° C in temperature.

The conventional cooling and heating apparatus using geothermal heat is composed of a geothermal exchanger for recovering geothermal heat and a heat pump for cooling and heating by moving the recovered geothermal heat to a required place.

In most cases, the installation of the geothermal heat exchanger is installed in such a manner that the heat exchange pipe is buried by excavating the borehole in a substantially vertical direction after securing a sufficient ground.

The installation of such a geothermal exchanger is well suited for larger buildings with no rocks near the surface or few slope collapses. In the installation of such a geothermal heat exchanger, a borehole having a depth of about 50 to 1000 m underground is excavated at a predetermined interval, and a pipe having a U-shaped end is wound in each bore hole once or twice.

After the pipes are installed, each bore hole is filled with bentonite or cement, which is impermeable material, and then grouted. During the grouting process, the boreholes are filled with special materials to prevent the infiltration of surface water into the aquifer or the penetration of water due to the failure of adjacent aquifers.

However, such a conventional geothermal heat exchanger uses a method in which a geothermal heat is directly transferred to a circulation pipe by inserting a heat exchange pipe into a borehole and performing a grouting operation, so that a heat storage function can not be given and a calorific value is small There is a problem that the heat exchange performance is inevitably lowered.

FIG. 1 is a schematic view showing a geothermal heat pump system of a conventional geothermal heat pump system. FIG. 1 is a schematic view showing a groundwater heat exchanger according to a first embodiment of the present invention. A ground hole 17 is formed in the soil layer 16 between the ground surface 19 and a U-shaped underground heat exchanger 11 is disposed in the borehole 17 and the heat exchanger The inner space of the corresponding borehole 17 of the rock layer 15 is filled with a large number of gravel 14 so that the groundwater flowing into and out of the rock layer 15 and the permeable pipe 12 The supplied water is filled in the space between the gravel 14 and the gravel 14 so as to mutually exchange heat with the underground heat exchanger 11. The inner space of the corresponding borehole 17 of the soil layer 16 is filled with bentonite 18), and then finishing Rock structure.

On the other hand, when the depth of the borehole 17 is about 30M underground, the temperature is about 16-17C. When the depth is about 100M, the temperature is about 17-18C. It is observed that a temperature change of about 500C to about 30C is generated when the temperature is about 24 to 26 DEG C and the underground temperature is about 100M.

In order to utilize the geothermal heat with the above-mentioned temperature, the conventional underground heat exchanger is constructed by bending a pipe in the form of "U" as in Korean Patent Registration No. 771934 or by using the "I" form as in Korean Utility Model Registration No. 434648 Which has a structure of a simple structure using a connecting pipe connecting the pipes.

Conventional underground heat exchangers having the above-described structure have a problem in that heat transfer efficiency is lowered as the size of the pipe is increased by using a single pipe with a heating medium filled therein.

1. Korean Patent Registration No. 771934. 2. Korean utility model registration No. 434648.

According to the present invention, which is devised in view of the above-described problems, the present invention provides a connecting function for increasing the efficiency of heat exchange and connecting the inlet pipe to the outlet pipe by branching into a plurality of branch pipes at a portion where the inlet pipe and the outlet pipe meet, And to provide a heat exchanging apparatus for a cooling / heating system using geothermal heat that is easily exchanged when the heat exchanger is broken or damaged.

According to the present invention, there is provided a heat exchange apparatus for use in a cooling / heating system using geothermal heat, comprising: a housing having a body provided with a space for filling a heating medium and a lid having a coupling hole and a through hole; A first branching means and a second branching means each comprising a branch body formed integrally with a connecting pipe connecting the inlet pipe or the outlet pipe and having a plurality of through holes; A first direction switching connection means and a second direction switching connection means for forming a connection through-hole corresponding to the connection through-hole and switching the flow direction of the heat sink; A plurality of branch pipes installed between the branching means and the direction switching connection means; And a connection pipe connecting the first direction switching connection means and the second direction switching connection means. The present invention is also directed to a heat exchange apparatus for a cooling / heating system using geothermal heat.

Wherein the lid is further provided with a ring for facilitating the removal of the heat exchanger installed in the borehole.

Wherein the connection pipe is formed in a shape of ∩, in which the direction of movement of the fluid is shifted from the lower part to the upper part and then the lower part is changed to the lower part.

Wherein the connecting pipe is further provided with an orifice.

According to the present invention, heat exchange is performed in a short time by branching into a plurality of branch pipes at a portion where an inlet pipe and an outlet pipe meet, thereby improving the heat exchange efficiency and improving the connection function for connecting the inlet pipe and the outlet pipe, It is a very useful invention that has an easy effect of exchange when damaged.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view showing a heat exchange method of a cooling / heating system using geothermal heat. FIG.
FIG. 2 is a schematic view showing the installation state of a heat exchanger for a cooling / heating system using geothermal heat to which the technology of the present invention is applied. FIG.
3 is a cross-sectional view showing the structure of a heat exchange device for a cooling / heating system using geothermal heat applied to the technique of the present invention.
4 is an enlarged view of the "A" portion of FIG.
5 is a sectional view showing another structure of a heat exchanger for a cooling and heating system using geothermal according to the present invention.
6 is a sectional view showing a structure in which an orifice is further installed in a connection pipe which is a component of the heat exchange device of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a schematic view showing the installation state of a heat exchange apparatus for a cooling / heating system using geothermal heat applied the technology of the present invention, and FIG. 3 is a sectional view showing the structure of a heat exchange apparatus for a cooling / heating system using geothermal heat applied with the technique of the present invention The heat exchanging apparatus 1 of the present invention is installed in a housing 100 having a body 110 having a space 120 filled with a heating medium and a lid 130 having a coupling hole and a through hole, .

The lid 130 is further provided with a ring 140 to facilitate the removal of the heat exchanger 1 installed in the borehole.

The branch bodies 230 and 330 are formed integrally with the inlet pipes 210 and 310 and the connection holes 220 and 320 are formed as shown in FIG. The connecting portions 210 and 310 of the first branching means 200 and the second branching means 300 of the first branching means 200 and the second branching means 300 of the branching body 230 ) 330 are positioned.

The connection through holes 420 and 520 corresponding to the connection through holes 220 and 320 of the first branching means 200 and the second branching means 300 installed at the upper portion are formed and the direction of flow of the heat- The first direction switching connection means 400 and the second direction switching connection means 500 are provided at the lower portion.

The structure of the first direction switching connection unit 400 and the second direction switching connection unit 500 is the same as that of the first embodiment shown in FIGS. 3 and 4B, except that the connection through holes 420 and 520 are formed, 510 and pipe connecting ports 430, 530, which are collectively assembled in one place.

Meanwhile, a plurality of branch pipes 600 are installed between the branching means and the direction switching connection means in the connection through holes 220, 320, 420 and 520, and the first direction switching connection means 400 and the second The direction switching connection means 500 is connected by a connection pipe 700.

As shown in FIGS. 3 and 5, the connection pipe 700 is formed in an ∩-shape in which the direction of fluid movement is shifted from the lower part to the upper part and then the lower part is switched to the lower part.

The reason for switching the direction of the connection pipe 700 in the up-and-down direction is to increase the efficiency of the heat exchange and to prevent the branch pipe 600, specifically the first branching means 200 and the second branching means 300, So that the size of the apparatus can be reduced. As shown in FIG. 6, the connection pipe 700 may further include an orifice 800.

In the same manner as in the conventional method, the inner space of a borehole where a hole is vertically excavated in the ground is filled with a large number of gravel, Gas) and ground water are filled in the space between the gravel and the gravel to mutually exchange heat with the heat exchanger, and the inner space of the corresponding borehole in the soil layer is filled with bentonite to finish the structure.

At this time, the operation of the heat exchange apparatus 1 of the present invention is such that as shown in FIG. 3, when the geothermal heat is transferred to the heat medium which is filled in the inside of the body 110 forming the housing 100, The heating medium is heated, and an internal heating medium (typically, water is used) is supplied through an inlet pipe connected to the connecting portion 210 which is exposed to the outside through the through hole of the lid 130.

When the internal heating medium is supplied into the branch body 230 having a plurality of connection holes 220 formed integrally with the connection portion 210, the branching body 230 is branched by the plurality of branch pipes 600 installed in the first branching means 200, And the internal heat medium supplied to the inside of the main body 230 is divided into 1 / N and moved.

For example, when the internal heating medium of 10 L is infiltrated into the branch main body 230 of the first branching means 200 through the inlet pipe, as shown in FIG. 4A, the branch pipes 600 are divided into 2.5L, . Accordingly, since the branch pipe 600 is relatively smaller in diameter than the inlet pipe, the heat exchange efficiency is increased, so that the heat of the heating medium heated by the geothermal heat heats the branch pipe 600, .

 Meanwhile, the total internal flow rate of the internal heat medium is divided by the number of the branch pipes 600 by the branch pipe 600 and then transferred to the first direction switching connection means 400 located at the lower portion. The flow of the fluid is shifted to the upper side and moved.

The first direction switching connection means 400 is configured such that the internal heating medium divided by the branch pipe 600 is collected in the storage cylinder 410 and connected to the pipe connector The flow of the fluid moves from the lower part to the upper part and the heat exchange is performed through the connecting pipe 700 connected to the upper part 430. [

3 and 5, the reason why the structure of the connection pipe 700 is formed in the ∩ shape is to increase the efficiency of the heat exchange and to increase the efficiency of the branch pipe 600, (200) and the second branching means (300) so as to reduce the size of the apparatus. As shown in FIG. 6, the connection pipe 700 may further include an orifice 800.

As described above, when the orifice 800 is further installed at a certain portion of the connection pipe 700, pressure is generated inside the connection pipe 700, so that the fluid passing through the orifice 800 is mixed with the pressure, So that heat can be transferred evenly and fluid movement can be facilitated.

As described above, since the internal heat medium, which is located at the bottom by the first direction switching connection means 400, is moved through the connection pipe 700 at a time and moved from the lower part to the upper part, the moving speed is slower, Has an increasing effect.

Meanwhile, the internal heat medium via the first direction switching connection means 400 is transferred to the second direction switching connection means 500 through the connection pipe 600, and the internal heat medium transferred is transferred to the second direction switching connection means 500 (Not shown).

When a certain amount of the internal heat medium is collected in the storage cylinder 510 of the second direction switching connection unit 500, the internal heat medium is divided and moved by the branch pipe 600 fitted in the connection hole 520 .

The internal heat medium is divided into a small amount by the branch pipe 600 and heat exchange is facilitated. The internal heat medium is collected in the second branching means 300 installed at the end of the branch pipe 600, And is discharged to the outside by an outflow pipe connected to the outlet pipe.

On the other hand, when the heat exchanger 1 installed in the borehole is to be taken out due to aging, breakage or the like due to long use, the heat exchanger 1 can be taken out of the borehole conveniently and easily by using the ring 140.

In the present invention as described above, heat exchange is performed in a short time by branching into a plurality of branch pipes at a portion where an inlet pipe and an outlet pipe meet, thereby increasing the heat exchange efficiency and increasing the connection efficiency between the inlet pipe and the outlet pipe, And it is an extremely useful invention that has an effect of facilitating exchange when it is damaged.

1: Heat exchanger 100: Housing
110: body 120: space
130: cap 140: ring
200: first branch means 210, 310:
220, 320, 420, 520: connection through hole 230, 330:
300: second branch means 400: first direction switching connection means
410, 510: storage cylinder 430, 530: pipe connector
500: second direction switching connection means 600: branch pipe
700: connecting pipe 800: orifice

Claims (4)

1. A heat exchange apparatus for use in a cooling / heating system using geothermal heat,
A housing having a coupling body and a lid having a through hole coupled to a body provided with a space for filling the heating body;
A first branching means and a second branching means each comprising a branch body formed integrally with a connecting pipe connecting the inlet pipe or the outlet pipe and having a plurality of through holes;
A first direction switching connection means and a second direction switching connection means for integrally forming a storage cylinder and a pipe connection port for collecting the divided fluids in one place with connection through-holes corresponding to the connection through-holes to switch the flow direction of the fines;
A plurality of branch pipes installed between each of the branching means and each of the direction switching connection means;
And a connection pipe connecting the first direction switching connection means and the second direction switching connection means. The method according to claim 1,
Wherein the lid is further provided with a ring for facilitating the removal of the heat exchanger installed in the borehole. The method according to claim 1,
Wherein the connection pipe is formed in an ∩ shape in which a moving direction of the fluid is shifted from the lower part to the upper part and then the lower part is switched to the lower part. The method according to claim 1,
Wherein the connecting pipe is further provided with an orifice.

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