KR20190087741A - Geothermal heat exchanging system using automatic control device for underground water extraction - Google Patents

Abstract

Disclosed is a system for improving ground heat exchanger performance by an automatic control device for underground water extraction. The ground heat exchange system comprises: a ground heat exchange pore of a hollow shape; a geothermal heat pump arranged outside the ground heat exchange pore; a supply line to supply a heating medium to the geothermal heat pump; a return line to return the heating medium heat-exchanged by the geothermal heat pump; a heating medium circulation pump to move the heating medium; an underground water extraction line to extract underground water in the ground heat exchange pore out of the ground heat exchange pore; a water tank arranged outside the ground heat exchange pore; an input/output line connected to the water tank; and an underground water extraction pump arranged in the ground heat exchange pore, wherein one side thereof is connected to the underground water extraction line to extract underground water in the ground heat exchange pore out of the ground heat exchange pore. According to an embodiment of the present invention, underground water in the ground heat exchange pore can be replaced to allow excellent heat exchange efficiency and stable operation.

Description

TECHNICAL FIELD [0001] The present invention relates to a geothermal heat exchanging system for an underground water extraction automatic control apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground water heat exchange system, and more particularly, to an underground water heat exchange system by an underground water extraction automatic control apparatus for extracting groundwater in an underground heat exchange hole to improve heat exchange efficiency.

Generally, geothermal exchange is a general term for excavating underground water and performing heat exchange using heat of inherent heat and underground of groundwater existing in the ground. In general, the lower surface of the earth is excavated to a deep depth of about 100m to 500m, This is where the pipe for heat exchange is pumped or the ground water is pumped, and the heat of the ground water is recovered by using a heat exchanger or a heat pump.

The open-air underground heat exchange system pumps the groundwater to the ground by using the heart pump installed in the ground, absorbs condensation heat or evaporation heat generated during the operation of the heat pump, and then returns to the ground, and the groundwater returned to the underground heart is heat- It is a facility that is able to continuously operate the heat pump while recovering the original temperature and recirculating it to the ground heat pump by the heart pump.

The closed-type underground heat exchange system is equipped with a heat medium circulation pump and a heat pump installed on the ground, and a circulation circulation pipe bent in a U-shape is inserted into an underground hole drilled at a depth of about 200 to 250 m And is configured to emit evaporation heat or condensation heat absorbed from the heat pump while indirectly performing heat exchange with the surrounding soil.

In a closed-type geothermal heat exchange system, the whole piping installed in the ground and the ground is a closed structure, and a heat medium circulation pump is installed in the ground piping to circulate the heat medium in the piping. However, since the open-air heat exchange system requires that the groundwater in the heart be pumped to the ground, a heart pump is installed inside the heart.

In this geothermal exchange, the underground temperature of 20m or less maintains a constant temperature throughout the year without any change of all seasons, making it a stable energy source that is environmentally friendly and can operate throughout the year.

Generally, the efficiency of geothermal exchange increases as the amount of underground water is increased, and the heat transfer efficiency through the underground heat exchanger increases. However, in case of overflow of the well, there is a problem such as damage to the surrounding space, civil complaints of neighboring houses, and leakage of surrounding soil.

As time passes, the permeability of the groundwater is decreased, and smooth groundwater flow is difficult. In the operation of the groundwater heat exchange system for a long time, the groundwater in the ground is heat-exchanged with the accumulated state, Lower.

Korean Patent No. 10-1609382 Korean Patent No. 10-1359394

SUMMARY OF THE INVENTION It is an object of the present invention, which has been made in view of the above, to provide an underground heat exchange system by an automatic groundwater extraction control apparatus with improved heat exchange efficiency.

It is also an object of the present invention to provide an underground heat exchange system by an automatic control device for groundwater extraction capable of appropriately adjusting groundwater level in the ground.

According to an aspect of the present invention, there is provided an underground water heat exchange system comprising: an underground heat exchange hole having a hollow shape penetrating a predetermined depth from an earth surface; A geothermal heat pump, a supply line where geothermal heat pumps are connected to the groundwater heat exchanger and groundwater in the underground heat exchange pores, a return line in which the heat medium heat-exchanged in the geothermal heat pump is returned to the inside of the underground heat exchange pond, A heat medium circulation pump for transferring the internal heat medium, a groundwater extraction line which is located inside the underground heat exchange pores and extracts groundwater from the underground heat exchange pores into the outside of the underground heat exchange pores, And the groundwater heat exchanger An input / output line connected to one side of the water tank and capable of storing groundwater therein, for discharging groundwater stored in the water tank to the outside or for injecting water outside the water tank into the water tank, And a groundwater extraction pump connected to the groundwater extraction line for extracting groundwater in the underground heat exchange pores to the outside of the underground heat exchange pores.

Further, the supply line and the water return line may be connected to each other inside the underground heat exchange pores to circulate the heat medium.

The apparatus may further include a first temperature measuring sensor coupled to the supply line and measuring a temperature of the heating medium moving in the supply line, and a second temperature measuring sensor coupled to the return line and measuring a temperature of the heating medium moving through the return line have.

The apparatus may further include a first controller for calculating a heat exchange efficiency value according to the measured values of the first temperature measurement sensor and the second temperature measurement sensor and operating the groundwater extraction pump when the calculated efficiency value is equal to or lower than a reference value.

In addition, an external supply line connected to the water tank and supplied with water stored in the water tank into the underground heat exchange pores, and a second interlock valve coupled to the external supply line to shut off the water supply of the external supply line.

And a second controller that is provided in the underground heat exchange pores and opens the second interlock valve when the level of the groundwater measured by the water level sensor is below the reference value.

In addition, a third interlocking valve for interrupting the circulation of the heating medium is coupled to the supply line or the water-return line, and the first controller can control the third interlocking valve to block the circulation of the heating medium when the calculated efficiency value is equal to or lower than the reference value .

In accordance with another embodiment of the present invention, an underground heat exchange system using an automatic control device for groundwater extraction includes a well hole installed at a certain depth from an earth surface, a hollow underground heat exchange hole penetrating into the ground from a well hole, A groundwater supply pump connected to the groundwater supply line, and a groundwater heat exchanger connected to the groundwater supply line, wherein the groundwater heat exchanger includes a groundwater heat pump, A groundwater recovery line which is located inside the underground heat exchange pores and has a groundwater extraction line for extracting groundwater inside the underground heat exchange pores to the outside of the underground heat exchange pores, The inside of the underground heat exchange pores extracted through the groundwater extraction line A water tank for storing the groundwater of the water tank, an input / output line connected to one side of the water tank for discharging groundwater stored in the water tank to the outside, or for injecting water outside the water tank into the water tank, And a groundwater extraction pump connected to the groundwater extraction line for extracting the groundwater inside the underground heat exchange pores to the outside of the underground heat exchange pores.

In addition, the groundwater supply line and the groundwater exchange line can be circulated within the underground heat exchange pores to separate the groundwater from each other.

A first temperature measurement sensor coupled to the groundwater supply line and measuring a temperature of the groundwater moving through the groundwater supply line, and a second temperature measurement sensor coupled to the groundwater return line and measuring the temperature of the groundwater moving through the groundwater return line can do.

The apparatus may further include a first controller for calculating a heat exchange efficiency value according to the measured values of the first temperature measurement sensor and the second temperature measurement sensor and operating the groundwater extraction pump when the calculated efficiency value is equal to or lower than a reference value.

The second interlock valve may be connected to an external supply line connected to the water tank and water stored in the water tank to the inside of the underground heat exchange pores, and a second interlock valve connected to the external supply line to block water supply to the external supply line.

And a second controller that is provided in the underground heat exchange pores to open the second interlock valve when the level of the groundwater measured by the water level sensor and the level sensor is lower than a reference value.

In addition, a third interlock valve that blocks the movement of the groundwater is connected to the groundwater supply line and the groundwater return line, and the first controller controls the third interlock valve to block the movement of the groundwater when the calculated efficiency value is less than the reference value can do.

According to one embodiment of the present invention, the heat exchange efficiency value is calculated, and the groundwater in the underground heat exchange pores is replaced. Thus, the heat exchange efficiency is high and the groundwater level in the underground heat exchange pores can be managed at a proper level.

Further, there is an advantage that an interlocking valve and a controller are constituted so that the maintenance of heat exchange efficiency is automatically controlled.

Also, since the water tank is provided outside the underground heat exchange pores and the input / output line connected to the water tank is provided, the groundwater resources can be utilized as domestic water and the like, thereby being environmentally friendly and economical.

1 is a schematic view showing an underground heat exchange system by an automatic groundwater extraction control apparatus according to a first embodiment of the present invention.
FIG. 2 is a state diagram showing changes in the groundwater level in the underground heat exchange pores according to the first embodiment of the present invention.
3 is a schematic view showing an underground heat exchange system by an automatic groundwater extraction control apparatus according to a second embodiment of the present invention.
4 is a schematic view showing an underground heat exchange system by an automatic groundwater extraction control apparatus according to a third embodiment of the present invention.
5 is a block diagram illustrating control of a first controller and a second controller according to an embodiment of the present invention.

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

In describing the present invention, a detailed description of related arts will be omitted in order not to obscure the gist of the present invention.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Hereinafter, a geothermal heat exchanger performance enhancement system by an automatic groundwater extraction system according to an embodiment of the present invention will be described in detail.

First Embodiment Fig.

FIG. 1 is a schematic view showing an underground heat exchange system by an automatic groundwater extraction system according to a first embodiment of the present invention. FIG. 2 is a view showing a groundwater level change inside the underground heat exchange hole 100 according to the first embodiment of the present invention. Fig.

Referring to FIG. 1, the groundwater heat exchange system according to the present invention includes a hollow-type geothermal heat exchange hole 100 penetrating the ground at a predetermined depth, A geothermal heat pump 20 for supplying geothermal heat to the geothermal heat pump 20, a supply line 110 for supplying a heat medium to the geothermal heat pump 20 for heat exchange with underground water in the ground, A groundwater extraction line 310 for extracting groundwater in the underground heat exchange holes 100 from the underground heat exchange holes 100, a groundwater heat exchange hole 100 for extracting the groundwater from the underground heat exchange holes 100, A water tank 300 capable of storing groundwater in the underground heat exchange hole 100 extracted through the groundwater extraction line 310 and a water tank 300 connected to the water tank 300, The stored groundwater An inlet and an outlet line 350 for discharging the water from the water tank 300 to the inside of the water tank 300 and the groundwater extraction line 310 for connecting the groundwater in the ground heat exchange hole 100 to the ground And a groundwater extraction pump 320 for extracting the water from the heat exchange pores 100. The supply line 110 and the water return line 120 are connected to each other inside the underground heat exchange hole 100 to circulate the heat medium .

A first temperature measurement sensor 111 may be coupled to the supply line 110 to measure the temperature of the heating medium moving in the supply line 110. A second temperature measurement sensor 121 may be coupled to the return line 120, .

The underground heat exchange pores (100) are installed to penetrate to a certain depth from the surface of the earth. It has a cavity inside and a depth of penetration depends on the method of underground heat exchanger, the condition of underground, and purpose of use.

The underground heat exchange holes 100 may be formed with a plurality of openings to allow groundwater in the ground to flow into or out of the underground heat exchange holes 100. The openings may vary in number, shape, and position according to the height of the underground heat exchange holes 100, and a part of the underground heat exchange holes 100 may be grouted. In one embodiment of the present invention, the upper portion of the underground heat exchange pores 100 may be grouted so as to block the inflow or outflow of groundwater, and the lower portion may be formed with openings or spirals. In another embodiment, the underground heat exchange pores 100 may be configured in a pored state. The configuration of the grouting and pored state of the underground heat exchange pores (100) is determined based on the permeability of the ground and the groundwater condition.

The grouting is performed by injecting grout such as various kinds of cement, mortar, and medicines in the vicinity of the underground heat exchange hole 100 or the underground heat exchange hole 100. The grout may be bentonite grout or cement grout.

The pore state refers to a state in which no additional process such as grouting is performed so that the permeability of groundwater in the ground is increased.

An underground heat exchange system according to an embodiment of the present invention having an underground heat exchange hole 100 in which an upper portion is grouted and a lower portion is in a pored state is characterized in that the underground heat exchange hole 100 Since the groundwater is convected only in the lower part, it is possible to secure a certain level of groundwater level in the underground heat exchange pores (100) without being affected by the aquifer state and groundwater.

In addition, groundwater in the underground heat exchange pores (100) is extracted by the groundwater extraction pump (320). Groundwater in the target underground heat exchange pores (100) It can be extracted to the appropriate water level. Furthermore, it is easy to secure the minimum operation flow rate of the groundwater extraction pump 320.

The geothermal heat pump 20 installed on the outside of the underground heat exchange pores 100 means a facility for heating or cooling by using geothermal heat in the ground.

One side of the supply line 110 is provided inside the underground heat exchange hole 100 and the other side is connected to the geothermal heat pump 20. In the inside of the supply line 110, the heating medium moves. The supply line 110 may include a first temperature sensor 111 for measuring the temperature of the heating medium.

One end of the water return line 120 is connected to the geothermal heat pump 20 and the other end is provided in the underground heat exchange hole 100. The heat medium of the supply line 110 absorbs or discharges heat from the geothermal heat pump 20 and then moves into the water return line 120. The heat medium inside the water return line 120 is again introduced into the underground heat exchange hole 100 to heat exchange with the groundwater.

A second temperature measuring sensor 121 may be provided on the water line 120 to measure the temperature of the heating medium.

In the first embodiment of the present invention, the supply line 110 and the water return line 120 are connected to each other at their ends in the underground heat exchange hole 100, and the heat medium flows through the supply line 110 and the water- (120). The connection of the supply line 110 and the return line 120 may be connected by a U-shaped tube or the like.

The circulation of the heat medium is performed through a heat medium circulation pump 130 coupled with the supply line 110 or the water return line 120. The heat medium circulation pump 130 is installed inside the geothermal heat pump 20 Or may be installed inside or outside the underground heat exchange pores (100).

The supply line 110 and the water return line 120 may be combined with a flow meter, a check valve, an air discharge device, or the like, and various devices may be further combined.

The first temperature measurement sensor 111 and the second temperature measurement sensor 121 may be connected to the first controller 30. The first controller 30 may be electrically connected to the first temperature measurement sensor 111 and the second temperature measurement sensor 121. The first temperature measurement sensor 111 and the second temperature measurement sensor 121 ), And the efficiency of the heat exchange system is calculated based on the received temperature value.

The underground water in the underground heat exchange pores 100 can be stagnated in the underground heat exchange pores 100 according to the aquifer and environmental factors and the stagnant groundwater can be stagnated in the underground heat exchange pores 100 according to long- May be higher or lower than the external groundwater temperature. The first controller 30 is a mechanism for calculating the degree of heat exchange efficiency of the heat medium in accordance with a change in the groundwater temperature inside the underground heat exchange pores 100. When the heat exchange efficiency is calculated to be lower than a reference value, .

The third interlock valve 112 may be coupled to the supply line 110 or the water return line 120 to block the movement of the heat medium circulated inside. The third interlock valve 112 may be opened or closed according to the efficiency of the first controller 30. When the efficiency value calculated by the first controller 30 is lower than the reference value, the third interlock valve 112 is closed, and the heating medium existing inside the supply line 110 and the extraction line is temporarily blocked from movement .

The water tank 300 is provided outside the underground heat exchange hole 100, and groundwater in the underground heat exchange hole 100 is extracted and temporarily stored. The water tank 300 is connected to the groundwater extraction line 310 and the groundwater extraction line 310 is connected to the groundwater extraction pump 320 provided in the underground heat exchange hole 100.

The water tank 300 serves as a reservoir capable of storing ground water, and the capacity and shape of the water tank 300 can be variously modified.

The input / output line 350 is connected to the water tank 300, and groundwater stored in the water tank 300 is discharged to the input / output line 350 and used for domestic water. In addition, the water tank 300 may be filled with external water through the input / output line 350.

The groundwater extraction pump 320 is provided in the heart of the underground heat exchange hole 100 to extract the groundwater from the underground heat exchange hole 100. In addition, a flow meter, a temperature measurement sensor, a shutoff valve, and the like may be coupled to the groundwater extraction pump 320 according to a well-known technique.

The groundwater extraction line 310 has one side connected to the water tank 300 and the other side connected to the groundwater extraction pump 320. Groundwater extracted by the groundwater extraction pump 320 flows through the groundwater extraction line 310 And may be stored in the water tank 300.

The groundwater extraction line 310 may be coupled to a first interlock valve 311 to block the movement of groundwater therein. In one embodiment of the present invention, the first interlock valve 311 is electrically connected to the groundwater extraction pump 320 and the first controller 30, and in response to the specific signal of the first controller 30, Is opened and closed.

2, when the efficiency value calculated by the first controller 30 is equal to or lower than the reference value, the first controller 30 opens the first interlock valve 311, The groundwater extraction pump 320 is operated. The groundwater extraction pump 320 is operated so that the groundwater in the underground heat exchange pores 100 is stored in the water tank 300 through the groundwater extraction line 310. As the groundwater is extracted, the water level in the underground heat exchange pores (100) is temporarily lowered, and groundwater existing in the ground flows into the underground heat exchange pores (100). The groundwater introduced into the underground heat exchange pores (100) has a constant temperature depending on the heat in the ground.

When the temperature of groundwater in the underground heat exchange pores (100) is lowered or lowered due to the operation of a long-term underground heat exchange system, the groundwater in the underground heat exchange pores (100) The groundwater is reintroduced, and thus an underground heat exchange system in which a constant heat exchange efficiency is maintained becomes possible.

Further, a water level sensor 321 may be provided inside the underground heat exchange pores 100, and the water level sensor 321 may be electrically connected to the first controller 30. When groundwater in the underground heat exchange pores (100) is extracted by the groundwater extraction pump (320), the groundwater level measured by the level sensor (321) is lower than a reference level. The first controller 30 generates a specific signal to stop the operation of the groundwater extraction pump 320 when the water level below the reference value is measured. Conversely, if the level of groundwater in the underground heat exchange pores (100) is higher than the reference value, the first controller (30) generates a specific signal for operating the groundwater extraction pump (320). The above-mentioned mechanism is to assist the stability and economical efficiency of the underground heat exchange system.

The external supply line 330 is connected to one side of the water tank 300 and is connected to the other side of the underground heat exchange hole 100. The external supply line 330 is connected to the underground water extraction line 310 of the water tank 300, Or water injected through the input / output line (350) into the underground heat exchange pores (100). In this case, depending on the height difference between one side of the external supply line 330 connected to the water tank 300 and the other side connected to the underground heat exchange hole 100, groundwater or the like stored in the water tank 300 Water can be supplied into the underground heat exchange pores (100).

A second interlock valve 331 may be coupled to the external supply line 330 and a second controller 40 may be provided to control the opening and closing of the second interlock valve 331.

The second controller 40 is electrically connected to the level sensor 321 and controls the second interlock valve 331 to be opened when the groundwater level measured by the level sensor 321 is lower than a reference value . The water stored in the water tank 300 fills the inside of the underground heat exchange pores 100 through the external supply line 330 and the second controller 40 recovers the second level So that the interlock valve 331 is closed.

An external supply pump 340 may be coupled to one side of the external supply line 330 to supply the water stored in the water tank 300 to the inside of the underground heat exchange hole 100. The external supply pump 340 may be electrically connected to the second controller 40 and may be operated only when the second interlock valve 331 is opened under the control of the second controller 40. Further, the external supply pump 340 may be provided outside the underground heat exchange hole 100.

5 is a block diagram illustrating control of the first controller and the second controller according to an embodiment of the present invention.

5, the first controller 30 and the second controller 40 can be integrated into one controller, and the first controller 30 and the second controller 40 can exchange signals between the first controller 30 and the second controller 40 have. The groundwater extraction pump 320, the heating medium circulation pump 130, the groundwater supply pump 230 and the groundwater supply pump 230, which will be described later, are connected to the first controller 30 and the second controller 40, The external supply pump 340 may be controlled. For example, when the heat exchange efficiency value calculated by the first controller 30 is low, the first controller 30 controls to stop the operation of the heat medium circulation pump 130 or the groundwater supply pump 230, It is conceivable that the first controller 30 and the second controller 40 exchange signals to control the second controller 40 to close the second interlock valve 331.

Second Embodiment

3 is a schematic view showing a system for improving the performance of an underground heat exchanger by an automatic groundwater extraction system according to a second embodiment of the present invention.

Referring to FIG. 3, the groundwater heat exchange system according to the second embodiment of the present invention includes a hollow underground heat exchange hole 100 penetrating the ground to a predetermined depth, A groundwater supply line 210 in which groundwater in the underground heat exchange hole 100 is supplied to the geothermal heat pump 20; a groundwater supply line 210 in the underground heat exchange hole 100; A groundwater supply line 230 connected to the groundwater supply line 210, a groundwater return line 220 in which groundwater heat-exchanged in the geothermal heat pump 20 is returned to the inside of the underground heat exchange hole 100, A groundwater extraction line 310 located inside the underground heat exchange hole 100 for extracting groundwater in the underground heat exchange hole 100 from the underground heat exchange hole 100, And The water tank 300 and the water tank 300, which are connected to the groundwater extraction line 310 and are capable of storing groundwater in the underground heat exchange hole 100 extracted through the groundwater extraction line 310, An input / output line 350 for discharging groundwater stored in the water tank 300 to the outside or injecting water outside the water tank 300 into the water tank 300; And a groundwater extraction pump 320 connected to the groundwater extraction line 310 for extracting groundwater in the underground heat exchange hole 100 from the underground heat exchange hole 100, And the groundwater return line (220) are spaced apart from each other in the underground heat exchange pores (100) to circulate the groundwater.

The geothermal heat pump 20, the groundwater extraction line 310, the water tank 300, the input / output line 350, and the groundwater extraction pump 320 according to the second embodiment of the present invention The configuration and the function of the first embodiment are the same.

The groundwater supply line 210 supplies groundwater introduced into the underground heat exchange holes 100 to the geothermal heat pump 20 and one side of the groundwater supply line 210 is connected to the underground water- And the other side may be connected to the geothermal heat pump 20. A groundwater supply pump 230 connected to the groundwater supply line 210 may be installed in the underground heat exchange hole 100. The groundwater supply pump 230 may be installed at a different location from the groundwater extraction pump 320.

The groundwater supply line 210 may be coupled to a first temperature measurement sensor 111 for measuring the temperature of the groundwater moving in the groundwater supply line 210.

The groundwater return line 220 serves as a passage through which groundwater heat-exchanged in the geothermal heat pump 20 is transferred into the underground heat exchange pores 100. One end of the groundwater return line 220 is connected to the groundwater heat- (20), and the other side may be formed so as to be provided inside the underground heat exchange holes (100).

A second temperature measurement sensor 121 may be coupled to the groundwater return line 220 to measure the temperature of the groundwater.

The ground water return line 220 provided in the underground heat exchange hole 100 is spaced apart from the end of the groundwater supply line 210 provided in the underground heat exchange hole 100 and the groundwater supply pump 230 do. The end of the groundwater return line 220 is positioned at an upper portion of the underground heat exchange hole 100 so that the groundwater supplied to the groundwater supply line 210 has a different temperature from the groundwater exchanged in the underground heat exchange hole 100, .

In the second embodiment of the present invention, the first controller 30, the second controller 40, the first interlock valve 311, the second interlock valve 331, the third interlock valve 112, The controller 330 may further include a water level sensor 321 and an external supply pump 340. The above configuration is the same as that of the first embodiment of the present invention.

Third Embodiment

4 is a schematic view showing an underground heat exchange system by an automatic groundwater extraction control apparatus according to a third embodiment of the present invention.

Referring to FIG. 4, the underground heat exchange pores 100 are formed in a plurality, and at least one underground heat exchange pores 100 constitute the underground heat exchange system according to the first embodiment, The underground heat exchange system according to the second embodiment is configured and the underground heat exchange system according to the first embodiment and the underground heat exchange system according to the second embodiment can be connected to each other.

According to the third embodiment of the present invention configured as described above, the groundwater level in the underground heat exchange pores (100) is managed by one water tank (300), and the water level of groundwater in the underground heat exchange pores The groundwater in the underground heat exchange holes 100 of the second embodiment can be extracted to further enhance the efficiency.

In addition, the internal water level of the underground heat exchange pores (100) can be changed according to the groundwater retention condition of the ground and the aquifer state, and thus the heat exchange efficiency can be changed. The economical efficiency of the maintenance can be secured by operating only one of or both of the underground heat exchange systems according to the first and second embodiments according to the heat exchange efficiency.

20: Geothermal heat pump 30: First controller
40: Second controller 100: Underground heat exchanger
110: supply line 111: first temperature measuring sensor
112: third interlock valve 120:
121: second temperature measurement sensor 130: heat medium circulation pump
210: groundwater supply line 220: groundwater return line
230: groundwater supply pump 300: water tank
310: ground water extraction line 311: first interlock valve
320: Groundwater extraction pump 321: Level sensor
330: external supply line 331: second interlock valve
340: external supply pump 350: input / output line

Claims (10)

A hollow underground heat exchange facility installed at a predetermined depth from the surface;
A geothermal heat pump provided outside the underground heat exchange pores;
A supply line through which the groundwater in the underground heat exchange pores is supplied to the geothermal heat pump;
A circulation line in which the heat medium exchanged in the geothermal heat pump is returned to the inside of the underground heat exchange pores;
A heat medium circulation pump coupled to the supply line or the water return line and moving the heat medium;
A groundwater extraction line having one end located inside the underground heat exchange pores and extracting groundwater in the underground heat exchange pores to the outside of the underground heat exchange pores;
A water tank provided outside the underground heat exchange pores and connected to the groundwater extraction line to store groundwater in the underground heat exchange pores extracted through the groundwater extraction line;
An input / output line connected to one side of the water tank and discharging the groundwater stored in the water tank to the outside or injecting water outside the water tank into the water tank;
And a groundwater extraction pump provided inside the underground heat exchange pores and connected to the groundwater extraction line at one side thereof for extracting groundwater in the underground heat exchange pores to the outside of the underground heat exchange pores,
Wherein the supply line and the water return line are connected to each other inside the underground heat exchange hole to circulate the heat medium.
The method according to claim 1,
A first temperature measuring sensor coupled to the supply line and measuring the temperature of the heating medium moving through the supply line;
A second temperature sensor coupled to the water line and measuring the temperature of the heat medium moving through the water line; And
And a first controller for calculating a heat exchange efficiency value according to the measured values of the first temperature measurement sensor and the second temperature measurement sensor and for operating the groundwater extraction pump when the calculated heat exchange efficiency value is equal to or lower than a reference value Features an underground heat exchange system.
The method according to claim 1,
An external supply line connected to the water tank and supplying water from the water tank to the inside of the underground heat exchange hole; And
And a second interlock valve coupled to the external supply line for blocking water supply from the water tank into the underground heat exchange pores.
The method of claim 3,
A level measuring sensor provided inside the underground heat exchange pores for measuring a level of the groundwater; And a second controller for opening the second interlock valve when the level of the groundwater measured by the water level sensor is lower than a reference value.
3. The method of claim 2,
A third interlock valve for interrupting the circulation of the heat medium is coupled to the supply line or the water return line,
Wherein the first controller controls the third interlock valve to close the circulation of the heat medium when the calculated heat exchange efficiency value is equal to or lower than the reference value.
A hollow underground heat exchange facility installed at a predetermined depth from the surface;
A geothermal heat pump provided outside the underground heat exchange pores;
A groundwater supply line through which groundwater in the underground heat exchange pores is supplied to the geothermal heat pump;
A groundwater supply pump provided in the underground heat exchange pores and connected to the groundwater supply line;
A groundwater return line through which the groundwater heat-exchanged in the geothermal heat pump is returned to the inside of the underground heat exchange pores;
A groundwater extraction line having one end located inside the underground heat exchange pores and extracting groundwater in the underground heat exchange pores to the outside of the underground heat exchange pores;
A water tank provided outside the underground heat exchange pores and connected to the groundwater extraction line to store groundwater in the underground heat exchange pores extracted through the groundwater extraction line;
An input / output line connected to one side of the water tank and discharging the groundwater stored in the water tank to the outside or injecting water outside the water tank into the water tank; And
And a groundwater extraction pump provided inside the underground heat exchange pores and connected to the groundwater extraction line at one side thereof for extracting groundwater in the underground heat exchange pores to the outside of the underground heat exchange pores,
Wherein the groundwater supply line and the groundwater return line are spaced apart from each other in the underground heat exchange hole to circulate the groundwater.
The method according to claim 6,
A first temperature measuring sensor coupled to the groundwater supply line and measuring a temperature of the groundwater flowing through the groundwater supply line;
A second temperature measuring sensor coupled to the groundwater return line and measuring the temperature of the groundwater moving through the groundwater return line; And
And a first controller for calculating a heat exchange efficiency value according to the measured values of the first temperature measurement sensor and the second temperature measurement sensor and operating the groundwater extraction pump when the calculated heat exchange efficiency value is equal to or lower than a reference value Wherein the heat exchanger is a heat exchanger.
The method according to claim 6,
An external supply line connected to the water tank and supplying water to the inside of the underground heat exchange hole from the water tank through the groundwater extraction line; And
And a second interlock valve coupled to the external supply line for blocking water supply from the water tank into the underground heat exchange pores.
9. The method of claim 8,
A level measuring sensor provided inside the underground heat exchange pores for measuring a level of the groundwater; And a second controller for opening the second interlock valve when the level of the groundwater measured by the water level sensor is lower than a reference value.
8. The method of claim 7,
A third interlock valve for blocking movement of the groundwater is connected to the groundwater supply line and the groundwater return line,
Wherein the first controller controls the third interlock valve to block the movement of the groundwater when the calculated heat exchange efficiency value is equal to or lower than a reference value.

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