KR20210151436A - Geothermal energy collecting system - Google Patents

Abstract

A geothermal energy recovery system according to the present invention includes a permanent drainage device having a water collecting tank and an underground water heat exchange pipe installed in the water collecting tank so that the heat recovery heat medium can flow, and an underground heat exchange pipe buried in the ground so that the heat recovery heat medium can flow and a heat pump having a heat pump tube through which the heat recovery heat medium can flow in order to exchange heat between the heat recovery heat medium and the heat source heat medium supplied to the heat source using device requiring geothermal energy; A first supply pipe for supplying the heat recovery heat medium to the underground water heat exchange pipe, a second supply pipe for supplying the heat recovery heat medium that has passed through the heat pump pipe to the underground heat exchange pipe, and the heat recovery heat medium that has passed through the groundwater heat exchange pipe flows to the heat pump pipe A first recovery pipe for controlling the flow of the heat recovery heat medium between the permanent drainage device and the heat pump, a first flow control valve for controlling the flow of the heat recovery heat medium between the permanent drainage device and the heat pump A second flow control valve for controlling the flow of the heat recovery heat medium between the underground heat exchanger and the heat pump, a heat recovery heat medium pump for pumping the heat recovery heat medium, the first flow control valve, the second flow control valve, and the heat recovery heat medium pump Includes a control unit for controlling the.

Description

Geothermal energy recovery system {GEOTHERMAL ENERGY COLLECTING SYSTEM}

The present invention relates to a geothermal energy recovery system, and more particularly, to a geothermal energy recovery system capable of recovering geothermal energy stored in the ground and providing it as a heat source for heating and cooling.

In general, excavation work is performed to a predetermined depth for the construction of civil engineering and building underground structures, and the ground (floor) where the excavation is completed becomes the base construction reference plane, and the civil engineering or building structure is based on this basic construction reference plane this is constructed

When groundwater penetrates or flows into the base construction reference plane, the groundwater acts as a positive pressure on the underground structure. The positive pressure acting on these underground structures is generated by the difference in the water head between the bottom of the underground structure and the surrounding underground water level, and acts as a force to lift the underground structure. The positive pressure caused by such groundwater adversely affects the underground structure.

Therefore, when planning the construction of an underground structure, a thorough review of changes in the groundwater and surrounding environment and measures to deal with buoyancy should be prepared so that problems related to groundwater do not occur during construction as well as after the structure is completed.

The buoyancy treatment method includes a treatment method by dead load, a treatment method using a permanent anchor or tension pile, and a permanent drainage method. In recent years, the permanent drainage method, which is easy to construct, has a low construction cost, and is excellent in effectiveness, is mainly used as a buoyancy treatment method.

The permanent drainage method is to reduce the buoyancy of groundwater acting on the bottom of the foundation layer for the construction of a building. It is a method of installing and collecting groundwater existing at the bottom of the foundation layer through the drainage layer to a collecting well, pumping it forcibly, discharging it to the ground, and then draining it to the outside.

When constructing the foundation layer of a building using the permanent drainage method, it has the advantage of being able to construct a stable foundation layer and build a building by removing the buoyancy of the groundwater on the foundation layer. There is a disadvantage in that the groundwater resource is inefficiently consumed as it is drained into a river or the like.

In addition, as interest in new and renewable energy has recently increased, measures to actively utilize geothermal energy stored in the ground, such as a method to utilize the thermal energy of groundwater discarded through a permanent drainage system, and a method to utilize underground thermal energy R&D is being actively carried out.

Registered Patent Publication No. 1103051 (2012. 01. 05.)

The present invention has been devised in view of the above points, and an object of the present invention is to provide a geothermal energy recovery system capable of efficiently recovering and utilizing geothermal energy stored in the ground, such as thermal energy of groundwater.

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

A geothermal energy recovery system according to the present invention for achieving the above object is installed underground, and a water collecting tank for collecting groundwater, and a heat recovery heating medium for heat exchange with the groundwater collected in the water collecting tank can flow. a permanent drainage device having an underground water heat exchange pipe installed in the water collecting tank; an underground heat exchanger having an underground heat exchange tube buried in the ground so that the heat recovery heating medium can flow in order to recover geothermal energy underground through the heat recovery heating medium; A heat pump having a heat pump tube through which the heat recovery heat medium can flow to exchange heat with the heat recovery heat medium passing through the permanent drainage device or the underground heat exchange device with a heat source heat medium supplied to a heat source using device requiring geothermal energy ; a first supply pipe connecting the heat pump pipe and the groundwater heat exchange pipe to supply the heat recovery heat medium that has passed through the heat pump pipe to the groundwater heat exchange pipe; a second supply pipe connecting the heat pump pipe and the underground heat exchange pipe to supply the heat recovery heat medium that has passed through the heat pump pipe to the underground heat exchange pipe; a first recovery pipe connecting the groundwater heat exchange pipe and the heat pump pipe to flow the heat recovery heat medium that has passed through the groundwater heat exchange pipe to the heat pump pipe; a second recovery pipe connecting the underground heat exchange pipe and the heat pump pipe to flow the heat recovery heat medium that has passed through the underground heat exchange pipe to the heat pump pipe; a first flow control valve for controlling the flow of the heat recovery heating medium between the permanent drainage device and the heat pump; a second flow control valve for controlling the flow of the heat recovery heat medium between the underground heat exchanger and the heat pump; a heat recovery heat medium pump installed to be connected to the heat pump pipe to pump the heat recovery heat medium; and the heat recovery heat medium supplied from the heat pump pipe passes through only the groundwater heat exchange pipe and is recovered to the heat pump pipe, or is recovered to the heat pump pipe through only the underground heat exchange pipe, or the groundwater heat exchange pipe and the underground and a control unit configured to control the first flow control valve, the second flow control valve, and the heat recovery heat medium pump so that all of the heat exchange pipes pass through and are recovered to the heat pump pipe.

The geothermal energy recovery system according to the present invention is connected to the heat pump pipe, the first supply pipe, and the second supply pipe to branch the heat recovery heat medium that has passed through the heat pump pipe to the first supply pipe or the second supply pipe and a branch valve controlled by the control unit; and the groundwater heat exchange pipe and the heat recovery heat medium passing through the heat pump pipe to be supplied to the underground heat exchange pipe after passing through the underground water heat exchange pipe, or to be supplied to the underground water heat exchange pipe after passing through the underground heat exchange pipe It may include; a bypass pipe connecting the underground heat exchange pipe.

The underground heat exchange tube may be installed so that the heat recovery heat medium passing therein can recover the geothermal heat of the underground soil.

The water collecting tank includes a water collecting room in which groundwater is collected, an inlet connected to the water collecting room to introduce groundwater into the collecting room, and an outlet disposed higher than the inlet to discharge the groundwater in the water collecting room; The permanent drainage device includes a support frame that supports the groundwater heat exchange pipe and can be coupled to the water collection tank, a drain room that can accommodate groundwater, and the groundwater discharged from the water collection room through the outlet into the drain room. a drainage tank having an inlet connected to the drainage chamber so as to be able to; a drain pipe connected to the drain pump so as to be discharged to the outside of the drain tank; and a level sensor that detects the level of groundwater accommodated in the drain chamber and provides a detection signal to the controller, wherein the controller comprises: The drain pump may be controlled according to the detection signal of the sensor.

The support frame is formed in a flat plate shape, and the support frame is detachably coupled to the inside of the water collecting tank by having a pair of coupling grooves facing each other and disposed in parallel so that both edges of the support frame can be inserted. A possible coupling portion may be installed.

Insertion grooves into which the groundwater heat exchange tube is inserted may be formed in one surface of the support frame parallel to both edges of the support frame.

The permanent drainage device may include an auxiliary pump installed in the drainage tank to pump the groundwater accommodated in the drainage chamber under control by the control unit, and the groundwater pumped by the auxiliary pump to be discharged to the outside of the drainage tank and an auxiliary pipe connected to the auxiliary pump so that the auxiliary pump is operated, and the control unit may operate the drain pump first and selectively operate the auxiliary pump according to the level of groundwater in the drain chamber.

The control unit operates only the drain pump when the water level of the groundwater in the drain room is above a preset first water level and is lower than a second water level preset higher than the first water level, and the water level of the groundwater in the drain room is the second When the water level is above the water level, the auxiliary pump may be operated together with the drain pump.

As described above, the geothermal energy recovery system according to the present invention does not discharge the collected groundwater as it is in the prior art, but collects the groundwater into a water collecting tank and recovers the heat of the groundwater through a heat recovery heating medium to provide a heat source to a heat source using device such as a heating and cooling device can be supplied with

In addition, the geothermal energy recovery system according to the present invention can efficiently recover various geothermal energy stored in the ground by using an underground heat exchange device together with a permanent drainage device, and is independent depending on the operating load of a heat source using device such as a heating and cooling device. By operating in various operating modes, such as a driving mode or a joint driving mode, it is possible to effectively provide a heat source to a heat source using device.

In addition, in the geothermal energy recovery system according to the present invention, since the heat exchange tube module of the permanent drainage device for recovering heat from groundwater is detachably installed in the water collecting tank, the installation or replacement of the heat exchange tube module is not difficult and maintenance is easy. .

1 schematically shows the configuration of a geothermal energy recovery system according to an embodiment of the present invention.
2 is a block diagram showing a partial configuration of a geothermal energy recovery system according to an embodiment of the present invention.
Figure 3 is a perspective view showing the permanent drainage device shown in Figure 1;
4 is a perspective view showing a part of the permanent drainage device shown in FIG. 1 cut away.
5 is a perspective view showing the permanent drainage device shown in FIG. 1 by omitting some configurations.
FIG. 6 is for explaining the coupling structure of the water collecting tank and the heat exchange tube module of the permanent drainage system shown in FIG. 1 .
7 and 8 show a process of separating the heat exchange tube module of the permanent drainage system shown in FIG. 1 from the water collecting tank.
9 to 11 are for explaining the operation of the permanent drainage device shown in FIG.
12 is for explaining the operation of the geothermal energy recovery system according to an embodiment of the present invention.
13 schematically shows the configuration of a geothermal energy recovery system according to another embodiment of the present invention.
14 schematically shows the configuration of a geothermal energy recovery system according to another embodiment of the present invention.
15 is for explaining the operation of the geothermal energy recovery system shown in FIG.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein.

In describing the present invention, the size or shape of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation.

In addition, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. These terms should be interpreted as meanings and concepts consistent with the technical spirit of the present invention based on the contents throughout this specification.

In order to clearly explain the present invention, the description of parts not related to the technical idea of the present invention is omitted, and the same reference numerals are given to the same or similar elements throughout the specification.

In addition, in various embodiments, components having the same configuration will be described using the same reference numerals only in the representative embodiment, and only configurations different from the representative embodiment will be described in other embodiments.

Throughout the specification, when a part is "connected" to another part, it includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. In addition, when a part "includes" a certain component, this may mean further including other components rather than excluding other components unless otherwise stated.

As shown in the drawings, the geothermal energy recovery system 100 according to an embodiment of the present invention includes a permanent drainage device 102 and a permanent drainage device 102 for recovering heat of groundwater (W) buried in the ground. In order to recover the geothermal energy of the ground together with the underground heat exchanger 104 buried in the ground, the permanent drainage device 102 and the geothermal energy transferred from the underground heat exchange device 104 are recovered to the heat source using device (10). It includes a heat pump 108 for supplying and a control unit 195 for controlling the overall operation of the geothermal energy recovery system 100 . The geothermal energy recovery system 100 may recover geothermal energy stored in the ground and provide it to the heat source using device 10 as a heat source for heating and cooling. The permanent drainage device 102 and the underground heat exchanger 104 are connected so that the heat pump 108 and the heat recovery heat medium flow. As the heat recovery heat medium, various fluids capable of exchanging heat with underground heat while passing through the permanent drainage device 102 and the underground heat exchanger 104 may be used. In this embodiment, the underground heat exchanger 104 will be described as being buried underground in a structure capable of recovering the geothermal heat of the underground soil.

The permanent drainage device 102 includes a water collecting tank 110 for collecting groundwater W, a heat exchange tube module 130 installed in the water collecting tank 110, and groundwater W discharged from the water collecting tank 110. The drain tank 150 that can be used, the drain pump 160 and the auxiliary pump 165 for discharging the groundwater W accommodated in the drain tank 150, and the groundwater W accommodated in the drain tank 150 It includes a level sensor 170 for detecting the level of. Such a permanent drainage device 102 may be buried in the ground of the site where the building is built to recover the heat of the groundwater (W).

The water collecting tank 110 is buried in the ground so as to collect the underground water (W) penetrating into the ground of the site where the building is built. The water collecting tank 110 includes a water collecting room 111 in which groundwater W is collected, an inlet 112 connected to the water collecting room 111 so that the groundwater W can be introduced into the water collecting room 111 , and a water collecting room. A discharge port 113 connected to the water collection chamber 111 is included so that the groundwater W of 111 can be discharged to the drain tank 150 side. The inlet 112 is disposed near the bottom of the water collecting tank 110 , and the outlet 113 is disposed higher than the inlet 112 . Therefore, the groundwater W flowing into the water collecting chamber 111 must reach a water level higher than the height of the outlet 113 from the bottom of the water collecting tank 110 to be discharged from the water collecting chamber 111 through the outlet 113. . The groundwater W discharged through the outlet 113 flows into the drain tank 150 through the connection passage 140 provided between the water collection tank 110 and the drain tank 150 .

Although the drawing shows that the water collecting tank 110 has a rectangular box shape, the structure of the water collecting tank 110 and the positions of the inlet 112 and the outlet 113 may be variously changed.

A coupling part 120 for fixing the heat exchange tube module 130 is installed in the water collecting tank 110 . The coupling part 120 includes a pair of coupling grooves 121 into which both left and right edge portions of the support frame 132 of the heat exchange tube module 130 can be respectively inserted, and a fixed lower end of the support frame 132 into which the lower end of the support frame 132 can be inserted. It has a groove 122 . The pair of coupling grooves 121 extend in the vertical direction, and are disposed in parallel to face each other. The fixing groove 122 is connected to the lower portion of each of the pair of coupling grooves 121 .

A water collecting tank cover 115 may be coupled to the upper portion of the water collecting tank 110 to cover the water collecting chamber 111 .

The heat exchange tube module 130 includes an underground water heat exchange tube 131 through which a heat recovery heat medium for heat exchange with groundwater W collected in the water collecting chamber 111 can flow, and a support frame for supporting the groundwater heat exchange tube 131 ( 132). The heat exchange tube module 130 is installed so that the groundwater heat exchange tube 131 is submerged in the groundwater W collected in the water collecting tank 110, and collects it into the water collecting tank 110 through the heat recovery heat medium flowing along the groundwater heat exchange tube 131. It is possible to transport the heat of the groundwater (W) to the outside of the collection room (111).

The support frame 132 is formed in a flat plate shape and may be fixed to the water collecting tank 110 through the coupling part 120 . As shown in FIG. 6 , the support frame 132 may be coupled to the coupling part 120 by descending from the upper side of the coupling part 120 toward the bottom of the water collecting tub 110 . At this time, both left and right edge portions of the support frame 132 are inserted into a pair of coupling grooves 121 provided in the coupling portion 120 , respectively, and the lower end portions are inserted into the fixing grooves 122 . Accordingly, the support frame 132 may be vertically placed to face one side of the water collecting tank 110 . In addition, the support frame 132 may be easily separated from the coupling part 120 by being pulled upward by the user. In this way, since the support frame 132 can be coupled to the coupling part 120 in a simple fitting manner, the operation of installing the heat exchange tube module 130 in the water collecting tank 110 or the heat exchange tube module 130 in the water collecting tank The work of dismantling in 110 can be easily made. As shown, the support frame 132 is provided with a handle 135 that the user can hold by hand.

A pair of insertion grooves 133 are formed on one surface of the support frame 132 to be parallel to both edges of the support frame 132 . By inserting the groundwater heat exchange tube 131 into the pair of insertion grooves 133 , the groundwater heat exchange tube 131 can maintain a stable coupling state with the support frame 132 . In addition, the support frame 132 is provided with an opening 134 penetrating the support frame 132 in the thickness direction. When the support frame 132 is coupled to the coupling part 120 , the groundwater W passing through the inlet 112 may be introduced into the collection chamber 111 through the opening 134 . When the heat exchange tube module 130 is coupled to the water collecting tank 110 so as not to cover the inlet 112 , the opening 134 in the support frame 132 may be omitted.

The groundwater heat exchange tube 131 may have a structure having a plurality of straight portions and a plurality of curved portions as illustrated so that the heat exchange area of the heat recovery heat medium flowing through the groundwater heat exchange tube 131 can be increased. A support 136 for supporting the groundwater heat exchange pipe 131 without being bent may be connected to the middle portion of the groundwater heat exchange pipe 131 . The structure or number of the groundwater heat exchange tube 131 is not limited to the illustrated ones and may be variously changed.

In the heat exchange tube module 130 , the groundwater heat exchange tube 131 is connected to the heat pump 108 to transmit the heat of the groundwater W collected in the water collecting tank 110 to the heat pump 108 . That is, the heat recovery heat medium inside the groundwater heat exchange tube 131 flows along the groundwater heat exchange tube 131 by the heat recovery heat medium pump 180, and the heat of the groundwater (W) collected in the water collecting tank 110 is transferred to the heat pump 108. will be forwarded to

When the heat exchange tube module 130 needs repair or replacement, it can be easily separated from the water collecting tank 110 as shown in FIGS. 7 and 8 . And after repair, it may be installed in the water collecting tank 110 again or replaced with a new one.

The drain tank 150 is disposed adjacent to the drain tank 150 so that the groundwater W discharged from the water collection tank 110 can flow in, and is buried together with the drain tank 150 in the ground. The drain tank 150 includes a drain chamber 151 for accommodating the groundwater W, and a drain chamber 151 for introducing the groundwater W flowing into the connection passage 140 into the drain chamber 151 . and an inlet 152 connected to. The inlet 152 is disposed lower than the outlet 113 of the water collecting tank 110 . A drain tank cover 154 may be disposed on the upper side of the drain tank 150 to cover the drain chamber 151 .

The drain pump 160 and the auxiliary pump 165 are installed in the drain tank 150 to pump the groundwater W accommodated in the drain chamber 151 .

A drain pipe 162 is connected to the drain pump 160 . The drain pipe 162 extends from the drain pump 160 to the outside of the drain chamber 151 to discharge the groundwater W pumped by the drain pump 160 to the outside of the drain tank 150 . A drain pipe valve 163 for controlling the flow of groundwater W through the drain pipe 162 is installed in the drain pipe 162 . The drain pipe valve 163 may take a manual type manually operated by a user or an automatic structure automatically operated by the control unit 195 .

An auxiliary pipe 167 is connected to the auxiliary pump 165 . The auxiliary pipe 167 extends from the auxiliary pump 165 to the outside of the drain chamber 151 to discharge the groundwater W pumped by the auxiliary pump 165 to the outside of the drainage tank 150 . An auxiliary pipe valve 168 for controlling the flow of groundwater W through the auxiliary pipe 167 is installed in the auxiliary pipe 167 . The auxiliary pipe valve 168 may take a manual or automatic structure similar to the drain pipe valve 163 .

When the groundwater W in the drain tank 150 is below a predetermined water level, only the drain pump 160 may be controlled to operate. In addition, when the groundwater W in the drain tank 150 exceeds a predetermined water level, the drain pump 160 and the auxiliary pump 165 may be controlled to operate together. When only the drain pump 160 operates, the flow path inside the auxiliary pipe 167 may be blocked by the auxiliary pipe valve 168 .

The level sensor 170 is installed in the drainage tank 150 to detect the water level of the groundwater W accommodated in the drainage chamber 151 . The level sensor 170 is coupled to the sump cover 154 and includes three sensing units 171 , 172 , 173 arranged to hang from the upper side of the drain chamber 151 toward the drain chamber 151 . do. The first sensing unit 171 is higher than the base sensing unit 173 and the second sensing unit ( 172) is arranged to hang down to a lower position. The second sensing unit 172 extends to a position higher than the first sensing unit 171 in order to detect the groundwater W reaching a height above the preset second water level H2 higher than the first water level H1. are placed The base sensing unit 173 is arranged to extend to a position lower than the first water level H1.

The level sensor 170 generates a detection signal according to the flow of current through the groundwater (W) between the base detection unit 173, the first detection unit 171, and the second detection unit 172, thereby generating the control unit 195 ) can be provided. For example, when only the base detection unit 173 is submerged in groundwater (W), the level sensor 170 does not generate a detection signal, and the base detection unit 173 and the first detection unit 171 are connected to the groundwater (W). When submerged in , the level sensor 170 may generate a detection signal for operating the drain pump 160 . And when the base sensing unit 173, the first sensing unit 171, and the second sensing unit 172 are all submerged in the groundwater W, the level sensor 170 controls the drain pump 160 and the auxiliary pump 165. A detection signal for actuation may be generated.

The installation height of each of the first sensing unit 171 , the second sensing unit 172 , and the base sensing unit 173 is the size of the drain tank 150 , the output capacity of the drain pump 160 and the auxiliary pump 165 , etc. It can be set in various ways according to it.

The level sensor 170 may be changed to various other structures in addition to the structure including the three sensing units 171 , 172 , and 173 as shown in the illustration according to a method of detecting the level of the groundwater. And, although the drawing shows that the level sensor 170 is coupled to the sump cover 154, the installation position of the level sensor 170 may be variously changed.

The drain pump 160 and the auxiliary pump 165 are controlled by the controller 195 according to the detection signal of the level sensor 170 . For example, as shown in FIG. 9 , when the water level of the groundwater W in the drain chamber 151 is less than the first water level H1 , the controller 195 controls the drain pump 160 and the auxiliary pump 165 . doesn't work And, as shown in FIG. 10 , when the water level of the groundwater W in the drainage chamber 151 reaches the first water level H1 , the controller 195 operates only the drainage pump 160 to remove the groundwater from the drainage chamber 151 . (W) can be discharged.

On the other hand, as shown in FIG. 11 , when the water level of the groundwater W reaches the second water level H2 , the controller 195 operates the auxiliary pump 165 together with the drain pump 160 to operate the drain chamber 151 . It can increase the amount of groundwater (W) discharged from the When the amount of groundwater (W) flowing into the drain chamber 151 is greater than the amount of groundwater (W) discharged from the drain chamber 151 by the drain pump 160, the water level of the groundwater W increases, so the auxiliary pump By operating (165), the groundwater (W) can be smoothly discharged from the drain chamber (151). In addition, even when the drain pump 160 does not operate smoothly or breaks down, the sub-pump 165 is operated to discharge the groundwater W from the drain chamber 151 .

The underground heat exchanger 104 recovers geothermal energy through a heat recovery heat medium and delivers it to the heat pump 108 . The underground heat exchanger 104 includes an underground heat exchange tube 105 that is embedded in the ground so that the heat recovery heat medium can flow. The underground heat exchange tube 105 is installed so that the heat recovery heat medium passing therethrough can recover the geothermal heat of the underground soil.

The heat pump 108 includes a heat pump pipe 109 through which a heat recovery heat medium can flow. This heat pump 108 heat-exchanges the heat recovery heat medium passing through the permanent drainage device 102 or the underground heat exchange device 104 with the heat source heat medium supplied to the heat source using device 10, thereby making the permanent drainage device 102 or underground heat exchange. The geothermal energy recovered by the device 104 may be supplied to the heat source utilization device 10 .

The heat source using device 10 is connected to the heat pump 108 through the heat source heat medium supply pipe 12 and the heat source heat medium recovery pipe 13 . A heat source heat medium capable of exchanging heat with the heat recovery heat medium passing through the heat pump pipe 109 flows through the heat source heat medium supply pipe 12 and the heat source heat medium recovery pipe 13 . The heat source heat medium supplied to the heat pump 108 through the heat source heat medium supply pipe 12 from the heat source using device 10 exchanges heat with the heat recovery heat medium, and the heat-exchanged heat source heat medium passes through the heat source heat medium recovery pipe 13 to the heat source using device ( 10), the heat of the heat recovery heating medium may be transferred to the heat source using device 10 . A heat source heat medium pump 14 for circulating a heat source heat medium is provided between the heat pump 108 and the heat source utilization device 10 .

A heat recovery heat medium pump 180 for pumping a heat recovery heat medium is connected to the heat pump pipe 109 . The heat recovery heat medium pump 180 is controlled by the controller 195 . The heat recovery heat medium may circulate between the heat pump 108 and the permanent drainage device 102 or between the heat pump 108 and the underground heat exchanger 104 by the action of the heat recovery heat medium pump 180 . The installation position of the heat recovery heat medium pump 180 is not limited to the illustrated one and may be variously changed.

The groundwater heat exchange pipe 131 of the permanent drainage device 102 is connected to the heat pump pipe 109 through the first supply pipe 181 and the first recovery pipe 184 to enable circulation of the heat recovery heat medium. In addition, the underground heat exchange pipe 105 of the underground heat exchanger 104 is connected to the heat pump pipe 109 through the second supply pipe 182 and the second recovery pipe 185 to enable circulation of the heat recovery heat medium.

The first supply pipe 181 is disposed between a branch valve 186 connected to one end of the heat pump pipe 109 and one end of the groundwater heat exchange pipe 131 to exchange heat recovery heat medium passing through the heat pump pipe 109 to groundwater. It can be supplied to the tube (131). The first recovery pipe 184 is disposed between the other end of the heat pump pipe 109 and the other end of the groundwater heat exchange pipe 131 to recover the heat recovery heat medium that has passed through the groundwater heat exchange pipe 131 to the heat pump pipe 109 . can A first flow control valve 188 for controlling the flow of the heat recovery heating medium between the permanent drainage device 102 and the heat pump 108 is installed in the first recovery pipe 184 . The first flow control valve 188 is controlled by the control unit 195 .

The second supply pipe 182 may be disposed between the branch valve 186 and one end of the underground heat exchange pipe 105 to supply the heat recovery heat medium that has passed through the heat pump pipe 109 to the underground heat exchange pipe 105 . And the second recovery pipe 185 is disposed between the other end of the heat pump pipe 109 and the other end of the underground heat exchange pipe 105 to recover the heat recovery heat medium that has passed through the underground heat exchange pipe 105 to the heat pump pipe 109 . can do it A second flow control valve 190 for controlling the flow of the heat recovery heat medium between the underground heat exchanger 104 and the heat pump 108 is installed in the second recovery pipe 185 . The second flow control valve 190 is controlled by the control unit 195 .

The branch valve 186 branches the heat recovery heat medium passing through the heat pump pipe 109 into the first supply pipe 181 or the second supply pipe 182, the heat pump pipe 109 and the first supply pipe 181 and the second supply pipe 182. 2 is connected to the supply pipe (182). The branch valve 186 is controlled by the controller 195 to switch the flow direction of the heat recovery heat medium passing through the heat pump pipe 109 toward the first supply pipe 181 or the second supply pipe 182 .

A bypass pipe 192 is disposed between the groundwater heat exchange pipe 131 and the underground heat exchange pipe 105 to connect the groundwater heat exchange pipe 131 and the underground heat exchange pipe 105 . Due to the action of the bypass pipe 192 , the underground water heat exchange pipe 131 and the underground heat exchange pipe 105 may have a series connection structure with the heat pump pipe 109 if necessary. That is, when the heat recovery heat medium flows through the bypass pipe 192 , the heat recovery heat medium discharged from the heat pump pipe 109 passes through the underground heat exchange pipe 105 and then is supplied to the groundwater heat exchange pipe 131 to exchange groundwater. It may flow from the tube 131 to the heat pump tube 109 . The bypass pipe 192 connects the second recovery pipe 185 and the first supply pipe 181 so that the heat recovery heat medium flowing from the underground heat exchange pipe 105 to the second recovery pipe 185 is transferred to the first supply pipe 181 . It can be supplied to the groundwater heat exchange pipe 131 through the.

The control unit 195 controls the first flow control valve 188 , the second flow control valve 190 , and the heat recovery heat medium pump 180 to switch the operation mode of the geothermal energy recovery system 100 .

As shown in FIG. 12 , the geothermal energy recovery system 100 may be operated in any one operation mode of the permanent drainage device alone operation mode, the underground heat exchanger alone operation mode, and the joint operation mode under the control of the controller 195 . have. The control unit 195 may operate the geothermal energy recovery system 100 in various operating modes according to the amount of groundwater collected in the water collecting tank 110 of the permanent drainage device 102 or the operating load of the heat source using device 10 . have.

The permanent drainage device alone operation mode is an operation mode in which only the permanent drainage device 102 works to recover geothermal energy. In the permanent drainage device independent operation mode, as shown in FIG. 12 ( a ), the branch valve 186 is controlled to flow the heat recovery heat medium to the first supply pipe 181 , and the first flow control valve 188 is opened and The second flow control valve 190 is controlled to close. Accordingly, the heat recovery heat medium discharged from the heat pump pipe 109 is supplied to the groundwater heat exchange pipe 131 of the permanent drainage device 102 through the first supply pipe 181 , and after passing through the groundwater heat exchange pipe 131 , the first It flows to the heat pump pipe 109 through the recovery pipe 184 . Since the heat recovery heat medium passes only through the groundwater heat exchange tube 131 in the permanent drainage system alone operation mode, the heat of the groundwater stored in the water collecting tank 110 is recovered and transferred to the heat pump 108 .

The underground heat exchanger alone operation mode is an operation mode in which only the underground heat exchanger 104 acts to recover geothermal energy. In the underground heat exchanger single operation mode, as shown in FIG. 12(b), the branch valve 186 is controlled to flow the heat recovery heat medium to the second supply pipe 182, and the first flow control valve 188 is closed and 2 The flow control valve 190 is controlled to open. Accordingly, the heat recovery heat medium discharged from the heat pump pipe 109 is supplied to the underground heat exchange pipe 105 of the underground heat exchanger 104 through the second supply pipe 182 and passes through the underground heat exchange pipe 105 and then the second It flows to the heat pump pipe 109 through the recovery pipe 185 . In the underground heat exchanger single operation mode, since the heat recovery heat medium passes only the underground heat exchange tube 105 , the geothermal heat of the underground soil is recovered and transferred to the heat pump 108 .

The joint operation mode is an operation mode in which the permanent drainage device 102 and the underground heat exchanger 104 work together to recover geothermal energy. In the joint operation mode, as shown in FIG. 12C , the branch valve 186 is controlled to flow the heat recovery heat medium to the second supply pipe 182 , and the first flow control valve 188 is opened and the second flow Control valve 190 is controlled to close. Therefore, the heat recovery heat medium discharged from the heat pump pipe 109 is supplied to the underground heat exchange pipe 105 of the underground heat exchanger 104 through the second supply pipe 182 and passes through the underground heat exchange pipe 105 and then bypasses. The groundwater is supplied to the heat exchange pipe 131 through the pipe 192 . And the heat recovery heat medium passing through the groundwater heat exchange pipe 131 is recovered to the heat pump pipe 109 through the second recovery pipe 185 . In this joint operation mode, since the heat recovery heat medium passes through both the underground heat exchange tube 105 and the groundwater heat exchange tube 131, the heat of the groundwater stored in the water collecting tank 110 and the geothermal heat of the underground soil can be recovered and delivered to the heat pump 108. have.

The geothermal energy recovery system 100 may be operated in a permanent drainage system independent operation mode or a joint operation mode when sufficient groundwater is collected in the water collecting tank 110 .

As described above, the geothermal energy recovery system 100 according to an embodiment of the present invention does not discharge the collected groundwater W as it is, but collects the groundwater W into the water collecting tank 110 to collect the groundwater ( The heat of W) may be recovered through a heat recovery heating medium and supplied as a heat source from the heat pump 108 to the heat source using device 10 such as a heating and cooling device.

In addition, the geothermal energy recovery system 100 according to an embodiment of the present invention can efficiently recover various geothermal energy stored in the ground by using the underground heat exchange device 104 together with the permanent drainage device 102, , it is possible to effectively provide a heat source to the heat source using device 10 by operating in various operating modes, such as an independent operating mode or a joint operating mode, according to the operating load of the heat source using device 10 .

In addition, in the geothermal energy recovery system 100 according to an embodiment of the present invention, since the heat exchange tube module 130 of the permanent drainage device 102 is detachably installed in the water collecting tank 110 , the heat exchange tube module 130 Installation or replacement is not difficult, and maintenance is easy.

On the other hand, 13 to 15 show various modifications of the geothermal energy recovery system according to the present invention.

First, in the geothermal energy recovery system 200 shown in FIG. 13 , only the installation positions of the permanent drainage device 102 and the underground heat exchange device 104 are changed compared to the geothermal energy recovery system 100 described above. When the geothermal energy recovery system 200 is operated in the joint operation mode, the heat recovery heat medium discharged from the heat pump pipe 109 first passes through the groundwater heat exchange pipe 131 of the permanent drainage device 102 and then the bypass pipe It is supplied to the underground heat exchange pipe 105 of the underground heat exchanger 104 through 192 . And the heat recovery heat medium passing through the underground heat exchange pipe 105 flows to the heat pump pipe 109 .

Meanwhile, in the geothermal energy recovery system 300 shown in FIG. 14 , the branch valve 186 and the bypass pipe 192 are omitted as compared to the geothermal energy recovery system 100 described above.

The geothermal energy recovery system 300 may be operated in various operating modes, as shown in FIG. 15 , depending on the amount of groundwater collected in the water collecting tank of the permanent drainage device 102 or the operating load of the heat source using device 10 . have.

As shown in (a) of FIG. 15 , in the permanent drainage apparatus alone operation mode, the first flow control valve 188 is opened and the second flow control valve 190 is controlled to close. At this time, the heat recovery heat medium discharged from the heat pump pipe 109 passes only through the permanent drainage device 102 and is recovered to the heat pump pipe 109 .

As shown in (b) of FIG. 15 , in the underground heat exchanger single operation mode, the first flow control valve 188 is closed and the second flow control valve 190 is controlled to open. At this time, the heat recovery heat medium discharged from the heat pump pipe 109 passes only through the underground heat exchange device 310 and is recovered to the heat pump pipe 109 .

As shown in (c) of Figure 15, in the joint operation mode, the first flow control valve 188 and the second flow control valve 190 are both controlled to open, so that the heat recovery heat medium is exchanged with the permanent drainage device 102 and underground. It passes through the device 310 and is returned to the heat pump pipe 109 .

Although preferred examples of the present invention have been described above, the scope of the present invention is not limited to the forms described and illustrated above.

For example, the number of permanent drainage devices and underground heat exchangers connected to the heat pump 108 may be variously changed.

In addition, in the drawing, it is shown that the groundwater W discharged from the water collecting tank 110 is introduced into the water collecting tank 150 through the connection passage 140 between the water collecting tank 110 and the water collecting tank 150, but the water collecting tank ( The groundwater (W) flow structure from 110 ) to the drainage tank 150 may be variously changed. As another example, the drain tank 150 may be installed to be buried lower than the water collection tank 110 .

In addition, although the drawing shows that two pumps 160 and 165 are installed in the drain tank 150 , the number of pumps installed in the drain tank 150 may be variously changed.

In addition, although it is shown in the drawing that one heat exchange tube module 130 in which one groundwater heat exchange tube 131 is coupled to the support frame 132 is installed in the water collecting tank 110 , the heat exchange installed in the water collecting tank 110 . The number or installation positions of the tube modules 130 may be variously changed.

In addition, the coupling part 120 provided in the water collecting tank 110 so that the heat exchange pipe module 130 can be coupled may be variously changed according to the structure of the heat exchange pipe module 130 .

While the present invention has been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as so shown and described, and is not intended to be limited by the appended claims. It will be understood by those skilled in the art that many changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention.

100, 200, 300: Geothermal energy recovery system
102: permanent drainage
104, 310: underground heat exchanger 105: underground heat exchange pipe
108: heat pump 109: heat pump pipe
110: water tank 111: water collection room
112: inlet 113: outlet
120: coupling part 130: heat exchange tube module
131: groundwater heat exchange pipe 132: support frame
140: connection passage 150: sump
151: drain chamber 152: entrance
154: sump cover 160: drain pump
162: drain pipe 163: drain pipe valve
165: auxiliary pump 167: auxiliary pipe
168: auxiliary pipe valve 170: level sensor
171: first sensing unit 172: second sensing unit
173: base detection unit 180: heat recovery heat medium pump
181: first supply pipe 182: second supply pipe
184: first recovery pipe 185: second recovery pipe
186: branch valve 188: first flow control valve
190: second flow control valve 192: bypass pipe
195: control

Claims (9)

a permanent drainage device buried in the ground and having a water collecting tank for collecting groundwater, and a groundwater heat exchange tube installed in the water collecting tank so that a heat recovery heat medium for heat exchange with the groundwater collected in the water collecting tank flows;
an underground heat exchanger having an underground heat exchange tube buried in the ground so that the heat recovery heating medium can flow in order to recover geothermal energy underground through the heat recovery heating medium;
A heat pump having a heat pump pipe through which the heat recovery heat medium can flow in order to exchange heat with the heat recovery heat medium passing through the permanent drainage device or the underground heat exchange device with a heat source heat medium supplied to a heat source using device requiring geothermal energy ;
a first supply pipe connecting the heat pump pipe and the groundwater heat exchange pipe to supply the heat recovery heat medium that has passed through the heat pump pipe to the groundwater heat exchange pipe;
a second supply pipe connecting the heat pump pipe and the underground heat exchange pipe to supply the heat recovery heat medium that has passed through the heat pump pipe to the underground heat exchange pipe;
a first recovery pipe connecting the groundwater heat exchange pipe and the heat pump pipe to flow the heat recovery heat medium that has passed through the groundwater heat exchange pipe to the heat pump pipe;
a second recovery pipe connecting the underground heat exchange pipe and the heat pump pipe to flow the heat recovery heat medium that has passed through the underground heat exchange pipe to the heat pump pipe;
a first flow control valve for controlling the flow of the heat recovery heating medium between the permanent drainage device and the heat pump;
a second flow control valve for controlling the flow of the heat recovery heat medium between the underground heat exchanger and the heat pump;
a heat recovery heat medium pump installed to be connected to the heat pump pipe to pump the heat recovery heat medium; and
The heat recovery heat medium supplied from the heat pump pipe passes only through the groundwater heat exchange pipe and is recovered to the heat pump pipe, or passes only the underground heat exchange pipe and is recovered to the heat pump pipe, or the groundwater heat exchange pipe and the underground heat exchange Geothermal energy recovery system comprising: a control unit for controlling the first flow control valve, the second flow control valve, and the heat recovery heat medium pump so that all of the pipes pass through and are recovered to the heat pump pipe.
According to claim 1,
A branch valve connected to the heat pump pipe, the first supply pipe, and the second supply pipe to branch the heat recovery heat medium passing through the heat pump pipe to the first supply pipe or the second supply pipe, and controlled by the control unit ; and
The heat recovery heat medium passing through the heat pump tube is supplied to the underground heat exchange tube after passing through the underground water heat exchange tube, or is supplied to the underground water heat exchange tube after passing through the underground heat exchange tube. Geothermal energy recovery system comprising a; bypass pipe connecting the heat exchange pipe.
According to claim 1,
The geothermal energy recovery system, characterized in that the underground heat exchange pipe is installed so that the heat recovery heat medium passing therein can recover the geothermal heat of the underground soil.
According to claim 1,
The water collecting tank includes a water collecting room in which groundwater is collected, an inlet connected to the water collecting room to introduce groundwater into the collecting room, and an outlet disposed higher than the inlet to discharge the groundwater from the collecting room;
The permanent drainage device,
a support frame that supports the groundwater heat exchange pipe and can be coupled to the water collecting tank;
A drainage tank having a drainage chamber capable of accommodating groundwater, and an inlet connected to the drainage chamber so as to introduce groundwater discharged from the collection chamber through the outlet into the drainage chamber;
a drain pump installed in the drain tank to pump groundwater accommodated in the drain room, and controlled by the controller;
a drain pipe connected to the drain pump to discharge the groundwater pumped by the drain pump to the outside of the drain tank;
and a level sensor that detects the level of groundwater accommodated in the drain chamber and provides a detection signal to the control unit,
The control unit, Geothermal energy recovery system, characterized in that for controlling the drain pump according to the detection signal of the level sensor.
5. The method of claim 4,
The support frame is made of a flat plate type,
A pair of coupling grooves disposed in parallel to face each other so that both edge portions of the support frame can be inserted into the water collecting tub is provided, and a coupling part to which the support frame can be detachably coupled is installed. Geothermal energy recovery system.
6. The method of claim 5,
and the coupling part includes a fixing groove provided at the lower side of the water collecting tank so that the lower end of the support frame can be inserted.
6. The method of claim 5,
The geothermal energy recovery system, characterized in that on one surface of the support frame, insertion grooves into which the groundwater heat exchange tube is inserted are formed parallel to both edges of the support frame.
5. The method of claim 4,
The permanent drainage device,
an auxiliary pump installed in the drainage tank so as to be controlled by the control unit to pump groundwater accommodated in the drainage chamber;
and an auxiliary pipe connected to the auxiliary pump so as to discharge the groundwater pumped by the auxiliary pump to the outside of the drainage tank,
wherein the control unit operates the drain pump first and selectively operates the auxiliary pump according to the level of groundwater in the drain chamber.
9. The method of claim 8,
The control unit is
operating only the drain pump when the water level of the groundwater in the drain chamber is above a preset first water level and is lower than a second water level preset higher than the first water level,
Geothermal energy recovery system, characterized in that the auxiliary pump is operated together with the drainage pump when the water level of the groundwater in the drainage chamber is equal to or higher than the second water level.

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