WO2011136435A1

WO2011136435A1 - Aquifer heat storage control system

Info

Publication number: WO2011136435A1
Application number: PCT/KR2010/003773
Authority: WO
Inventors: 윤운상; 박정훈; 윤건신; 이용호; 전재수
Original assignee: (주)넥스지오
Priority date: 2010-04-27
Filing date: 2010-06-11
Publication date: 2011-11-03
Also published as: KR101005231B1; CN102235778B; CN102235778A

Abstract

According to one aspect of the present invention, an aquifer heat storage control system, which uses an underground aquifer as a heat and cold storage medium, comprises: a cold water reservoir for storing cold by having cold underground water pumped therefrom for cooling during the summer, and having underground water, from which heat is absorbed for heating during the winter, fed therein; a hot water reservoir for storing heat, which is separated by a predetermined distance from the cold water reservoir so as to restrict the transfer of heat therebetween, and from which underground water, in which heat is stored, is pumped for heating during the winter, and having underground water, which has absorbed heat during cooling in the summer, fed therein; underground water piping for supplying pumped underground water to a heat pump and recovering heat-exchanged underground water and introducing same to the hot water reservoir and to the cold water reservoir; said heat pump for transferring cold from cold underground water pumped from the cold water reservoir to a hot/cold storage medium, and for transferring heat from hot underground water pumped from the hot water reservoir to the hot/cold storage medium; a thermal storage tank connected by a thermal medium pipe to the heat pump, so as to store a cold or hot storage medium transferred from the heat pump through the thermal medium pipe; and a controller for automatically controlling the operation of the heat pump according to a set cooling or heating mode, automatically controlling the pumping of underground water from the cold and hot water reservoirs, and automatically controlling the feeding of underground water into the cold and hot water reservoirs.

Description

Aquifer Regenerative Control System

The present invention relates to aquifer heat storage control system. Specifically, the present invention relates to an aquifer heat storage control system that utilizes cold / hot heat storage of aquifer for cooling and heating by using an underground aquifer as a cold heat storage body.

Geothermal heat storage heat pump system is being developed to secure the heat source required for cooling and heating through heat exchange using geothermal heat with constant temperature even with seasonal changes.

Patent documents include a heat storage type geothermal heat pump unit of Korean Patent No. 530259, a geothermal heat pump system of Korean Patent No. 949888, and the like. These conventional patent documents are a closed loop geothermal heat pump system that circulates to pump and recover underground groundwater in one groundwater hole, and is used for cooling and heating by storing a heat medium of cold or heat in a separate heat storage tank.

That is, in these conventional patent documents, the heat is stored in a heat storage tank about 5 to 10 ° C. through heat exchange in a heat pump using a constant geothermal heat at about 15 ° C. or heat storage in a heat storage tank about 45 to 60 ° C. As the basic heat source of heat storage for cooling and heating is geothermal heat constant around 15 ℃ to obtain the target heat storage temperature of the heat pump capacity or load is high.

The present invention is to solve the above-mentioned problems, without using geothermal heat around 15 ℃ as the primary heat source for the heat storage for direct cooling and heating, the groundwater heat exchanged by the operation of the heat pump divided into cold and warm heat again the underground aquifer It is to provide a more efficient heat storage heat pump system using the underground aquifer heat storage body by realizing a closed loop heat storage control system that is recovered and regenerated in the underground aquifer and using the heat accumulating underground aquifer heat storage body as a heat exchange heat source of the heat pump.

In order to achieve the above object, according to one aspect of the present invention, the cold water crystal is formed in the underground aquifer, the cold water is stored in the cold storage heat accumulation during the summer cooling and the ground water is deprived of heat during the winter heating is cold heat storage; A hot water well formed in the underground aquifer and spaced apart by a predetermined distance limited to cold water crystals and thermal interference, and pumped underground water that has been thermally heated during winter heating and absorbed heat during summer cooling; A groundwater pipe for supplying groundwater pumped from cold and hot water wells to a heat pump, and recovering groundwater heat exchanged from the heat pump and injecting the hot water and cold water wells; A heat pump transferring the cold heat of the cold heat groundwater pumped from the cold water well to the storage heat medium, and transferring the heat of the hot water ground pumped from the hot water well to the storage heat medium; A heat storage tank connected to the heat pump and the heat medium pipe, and storing a storage heat medium of cold or warm heat received from the heat pump through the heat medium pipe; And a controller for automatically controlling the operation of the heat pump and the groundwater pumping from the cold and hot water wells and the groundwater injection into the cold and hot water wells according to the set cooling or heating mode. An aquifer heat storage control system using an underground aquifer as a cold / hot heat storage body is proposed.

According to the aspect of the present invention, instead of using geothermal heat around 15 ° C as a basic heat source for heat storage for direct heating and cooling as in the prior art, the groundwater heat-exchanged according to the operation of the heat pump is divided into cooling heat and heat and recovered to the underground aquifer. By heat storage in the underground aquifer, the underground aquifer heat accumulator divided into cold heat and heat is used as a heat exchange heat source of the heat pump, thereby implementing a more efficient aquifer heat storage control system using the underground aquifer heat accumulator.

1 is a schematic diagram of an aquifer heat storage system applied to an embodiment of the present invention.

2 is a schematic system diagram of an aquifer heat storage control system according to an embodiment of the present invention.

3 is a schematic block diagram showing a control state of the aquifer storage control system according to another embodiment of the present invention.

4 is a schematic view showing a heat pump of the aquifer storage control system according to another embodiment of the present invention.

According to one aspect of the present invention, cold water crystal is formed in the underground aquifer, the cold water is stored in the cold storage heat accumulation during the summer cooling and the ground water is deprived of heat during the winter heating is cold storage heat storage; A hot water well formed in the underground aquifer and spaced apart by a predetermined distance limited to cold water crystals and thermal interference, and pumped underground water that has been thermally heated during winter heating and absorbed heat during summer cooling; A groundwater pipe for supplying groundwater pumped from cold and hot water wells to a heat pump, and recovering groundwater heat exchanged from the heat pump and injecting the hot water and cold water wells; A heat pump transferring the cold heat of the cold heat groundwater pumped from the cold water well to the storage heat medium, and transferring the heat of the hot water ground pumped from the hot water well to the storage heat medium; A heat storage tank connected to the heat pump and the heat medium pipe, and storing a storage heat medium of cold or warm heat received from the heat pump through the heat medium pipe; And a controller for automatically controlling the operation of the heat pump and the groundwater pumping from the cold and hot water wells and the groundwater injection into the cold and hot water wells according to the set cooling or heating mode. An aquifer heat storage control system using an underground aquifer as a cold / hot heat storage body is proposed.

Preferably, according to yet another aspect of the present invention, the aquifer heat storage control system is installed in a cold water well and a hot water well, respectively, and pumps ground water that is cold-heat-generated during cooling, and ground water that is heat-heat-generated during heating. Submersible motor pump for supplying ground water pipes; And a first circulation pump installed on the heat medium pipe and discharging the storage heat medium to the heat pump. It further comprises, wherein the controller is configured to stop the operation of the heat pump, the first circulation pump and the submersible motor pump when the temperature of the storage heat medium of the heat storage tank reaches a predetermined target temperature, the storage heat medium stored after the operation stops If the target temperature is out of a predetermined allowable range, the heat pump, the first circulation pump, and the submersible motor pump during operation are controlled to be restarted.

Further, more preferably, the heat storage target temperature of the storage heat medium of the heat storage tank is in the range of 5 to 10 ° C during summer cooling, and in the range of 45 to 55 ° C, preferably 45 to 50 ° C during winter heating. Further preferably, the above-mentioned predetermined allowable range

Is + (4-7) ° C at cooling, preferably + (4-6) ° C, and-(4-7) ° C at heating, preferably-(4-6) ° C.

Preferably, according to still another aspect of the present invention, the above-described controller is a groundwater pumping flow rate or / and heat medium from the cold or hot water well depending on the difference between the measured temperature and the set target temperature of the storage heat medium stored in the heat storage tank The circulation flow rate of the storage heat medium to the heat storage tank through the pipe is controlled.

Further preferably, according to another aspect of the present invention, the controller is dependent on the temperature of the groundwater pumped from the cold or hot water well, more preferably, the temperature and temperature of the ground water pumped from the cold or hot water well. Depending on the temperature of the groundwater injected into the crystal or cold water well, the flow rate of the ground water pumping from the cold or hot water well and / or the storage heat medium to the heat storage tank via the heat medium pipe is controlled.

Preferably, the controller described above depends on the difference in temperature in the storage heating medium in the above embodiments, or on the temperature of the groundwater, more preferably at the temperature of the groundwater being pumped and the temperature of the groundwater being injected. Accordingly, the treatment capacity of the heat pump is controlled along with controlling the groundwater pumping flow rate and / or the circulation flow rate of the storage heating medium.

Preferably, the aquifer heat storage control system further comprises: an underwater motor pump installed in each of the cold water well and the hot water well, for pumping the ground water regenerated by cold heat during cooling and the ground water regenerated by heat during heating; And a first circulation pump installed on the heat medium pipe and discharging the storage heat medium to the heat pump. It further comprises, the controller described above controls the submersible motor pump to control the groundwater pumping flow rate from the cold water well or hot water well, and the first circulation pump to control the circulation flow rate of the storage heating medium.

Further, preferably, the aquifer heat storage control system according to another aspect of the present invention is installed on the groundwater pipeline, and under the control of the controller, the groundwater supply pipeline connected to the submersible motor pump stopped pumping and being pumped Shut-off valves for blocking the groundwater recovery line to the cold or hot water well and simultaneously opening the groundwater supply line connected to the submersible motor pump being pumped and the groundwater recovery line to the stopped pumped cold or hot water well; A cooling and heating conduit for circulating heat storage heat medium of cold storage or heat storage of the heat storage tank to exchange heat with the building air conditioning equipment; And a second circulation pump installed on the air conditioning pipe and discharging the storage heat medium to the building air conditioning equipment. It further comprises.

Also preferably, the heat medium pipe direction control valve for controlling the flow direction of the heat medium pipe according to the control of the controller so that the storage heat medium heat-exchanged with the heat pump is returned to the bottom of the heat storage tank during the summer cooling, and to the top of the heat storage tank during the winter heating. Further provided with, the heat storage is made so that the storage heat medium stored in the heat storage tank gradually becomes uniform after stratification.

Preferably, according to another aspect of the present invention, the target temperature of the cold water crystal used as the heat storage body as the heat storage body is in the range of 5 to 10 ° C., and the target temperature of the hot water crystal as the heat storage body is 20 to 30 ° C., preferably It is in the range of 25 to 30 ° C.

Although not explicitly mentioned as one preferred aspect of the present invention, it is apparent that embodiments according to various possible combinations of the above-mentioned technical features can be implemented.

Embodiments of the present invention for achieving the above object are described with reference to the accompanying drawings.

In describing the embodiments, the same reference numerals refer to the same configuration, and additional descriptions that may overlap or limit the meaning of the invention may be omitted in describing the embodiments of the present invention.

1 is a schematic diagram of an aquifer heat storage system applied to an embodiment of the present invention, and FIG. 2 is a schematic system diagram of an aquifer heat storage control system according to an embodiment of the present invention. 3 is a schematic block diagram showing a control state of the aquifer storage control system according to another embodiment of the present invention.

The present invention relates to an aquifer heat storage control system using an underground aquifer as a cold heat storage body, and a specific embodiment will be described with reference to FIGS. 1 to 3.

According to one embodiment, the aquifer heat storage control system comprises a cold water tank 10, a hot water tank 20, groundwater pipeline 30, heat pump 50, heat storage tank 70 and the controller 40. .

The cold water well 10 and the hot water well 20 are formed in an underground aquifer and are spaced apart by a predetermined distance d, which is limited to thermal interference. Each of the cold water well 10 and the hot water well 20 may be one well, preferably at least one well, and preferably each of a plurality of wells. Preferably, the number of wells is determined in consideration of the quantity of pumpable water and the capacity of the heater pump 50 from day to day over a period of time from each well.

In the present invention, the underground aquifer is a layer containing groundwater, which has pores filled with water, and the groundwater can move through the interconnected pores. In the present invention, since the underground aquifer is used as a heat storage body, it is preferable to have a hydraulic property with a large porosity and a slow flow rate.

Preferably, in the present invention, the underground aquifer may be formed in the porous medium layer or the cracked rock layer. Preferably, the underground aquifer is a free faced aquifer or a confined aquifer.

In the present invention, when the underground aquifer is a free-surface aquifer, the free-surface aquifer is composed of silt or clay at the top and is covered with an impervious layer through which water does not pass well, or the free surface aquifer is low. It is desirable that the top of the underground aquifer plays a role of thermally conductive and / or hydraulic protection for the underground aquifer. Preferably, the free-surface aquifer can be formed in a crushed or weathered zone, which is an alluvial layer that is a porous medium layer or a cracked rock layer. In the case of an alluvial layer, it is preferable that it consists of sand, gravel, etc. which are covered with the impermeable layer of a clay or a silt layer in the upper part, and it is preferable that it is covered with the impermeable layer of a clay or a silt layer in the upper part in a crushing layer.

In addition, in the present invention, when the underground aquifer is a pressured aquifer, the upper part of the pressured aquifer is an impermeable layer (

It is covered with an impermeable layer. The pressured aquifer can be composed of porous rock or cracked rock layers. In the present invention, the impermeable layer is used in the sense of including a non-permeable layer (aquifuge) consisting of an aquiclude layer (층 水難透, aquiclude) and the water does not penetrate.

In the present invention, the underground aquifer has a large porosity and may contain a large amount of groundwater, and it is sufficient if it is formed in a low flow rate layer. Furthermore, it is preferable that the upper part of the underground aquifer plays a thermally conductive and / or hydraulic protection role against the groundwater. desirable.

Referring to FIG. 2, a distance d limited by thermal interference refers to a distance at or above which there is no or extremely limited thermal interference from one groundwater injection well to another groundwater pumping well over a predetermined period of time. In this case, preferably, the predetermined period may be from 6 months according to the summer and winter season, preferably 3 to 5 months, which is the aquifer heat storage period according to the actual heat pump operation.

Extremely limited thermal interference from one groundwater injection well to another groundwater pumping well means that the intermediate temperature transition zone formed between the groundwater heat accumulators of both wells does not form the other groundwater pumping well It is formed to be spaced apart from an appropriate distance from another groundwater pumping well.

In general ground heat behavior is transmitted through convection by the flow of groundwater, conduction through the medium, and dispersion due to the nonuniformity of the medium. For example, the distance d in which thermal interference is limited can be set by numerically analyzing the thermal behavior in the ground by the heat flux calculation model proposed by Molson et al. The process of calculating the distance (d) at which thermal interference is limited is not an intrinsic scope of the present invention, and the predetermined distance (d) at which thermal interference is limited is known to those skilled in the art through enumerated copper numerical analysis models. Since the self can be easily performed, a detailed description thereof will be omitted.

The cold water well 10 and the hot water well 20 cover the upper part with a cover or a cover box so that external foreign matter does not penetrate into the well, and preferably, the groundwater pipeline 30 passes through the cover or cover box or is at the side of the upper part of the well. Through the groundwater pipe 30 to be injected into the well. Preferably, the inside of the well of the cold water well 10 and the hot water well 20 grouts the strata formed in the upper part of the underground aquifer to prevent the penetration of groundwater or foreign matter.

In the present invention, since the cold water crystal 10 and the hot water crystal 20 are used as cold / hot heat accumulators, they are preferably used within one year, more preferably at least 6 months, more preferably at least between winter and summer. There should be little or no thermal interference due to the flow of groundwater between the cold water wells 10 and the hot water wells 20 formed in the underground aquifer within approximately three to five months, the actual duration of the pump 50.

Preferably, the cold water well 10 and the hot water well 20 may be hydraulically isolated by an impermeable layer such as a hard water permeable layer or a non-water permeable layer, and preferably, the depth of the cold water well 10 and the hot water well 20 Are not necessarily the same and may vary in depth.

Preferably, although not shown, the cold water well 10 and the hot water well 20 have a difference in depth, but the depth of the cold water well 10 is above the underground aquifer, and the depth of the hot water well 20 is below the underground aquifer. It is installed to be located. Further, preferably, the depths of the cold water wells 10 and the hot water wells 20 may be positioned to be hydraulically isolated or nearly isolated by an impermeable layer, such as an impermeable or non-permeable layer.

In the cold water well 10, the ground water that is cold-heated and stored during cooling in the summer is pumped, and the ground water which is deprived of heat during the heating in winter is injected and cold-heated.

In the hot water well 20, the ground-heated thermal water that is thermally heated during the winter heating is pumped, and the groundwater that absorbs the heat during the summer cooling is injected and thermally stored.

Referring to FIG. 3, preferably, the cold water wells 10 and the hot water wells 20 are provided with temperature sensors 15 and 25 for sensing the temperature of the regenerated ground water. The temperature sensors 15 and 25 illustrated in FIG. 3 are groundwater pipes 30 which are introduced into the heat pump 50 and / or discharged from the heat pump 50 instead of the cold water well 10 and the hot water well 20. It may be installed on the side.

In addition, referring to FIG. 2, the groundwater pipeline 30 supplies groundwater pumped from the cold water well 10 and the hot water well 20 to the heat pump 50, and recovers the groundwater heat exchanged from the heat pump 50. Injected into the hot water well 20 and the cold water well 10.

During cooling, the groundwater pipeline 30 supplies the cold heated groundwater pumped from the cold water well 10 to the heat pump 50, recovers groundwater heat exchanged from the heat pump 50, and injects it into the hot water well 20. During heating, the groundwater pipe 30 supplies the groundwater pumped from the hot water well 20 to the heat pump 50, recovers the groundwater heat exchanged from the heat pump 50, and injects it into the cold water well 10.

Preferably, the temperature of the groundwater recovered from the heat pump 50 and used as the heat storage body for cooling is 20 to 30 ° C., preferably 25 to 30 ° C., and is recovered from the heat pump 50 for heating and used as the heat storage body. Groundwater temperature is 5 ~ 10 ℃. That is, preferably, the temperature which thermally thermally accumulates in the hot water well 20 is 20-30 degreeC, Preferably it is 25-30 degreeC, and the temperature which cold-thermally accumulates in the cold water crystal | crystallization 10 becomes 5-10 degreeC. The temperature of the groundwater used as the heat storage body may vary depending on the heat capacity converted by the heat pump 50.

In addition, referring to Figure 2, in another embodiment of the present invention, the flow rate control valve 35 is further provided on the ground water supply pipe (30a) for supplying the ground water pumped by the heat pump (50). Preferably, the flow control valve 35 is controlled to supply an appropriate flow rate in accordance with the heat storage temperature of the heat storage tank (70). Preferably, the flow control valve 35 is composed of a remote control valve.

Furthermore, referring to FIG. 2, a filtering device 37 is further provided on the ground water supply line 30a for supplying ground water pumped to the heat pump 50. The filtering device 37 filters foreign matter contained in the groundwater. The filtering device 37 is installed between the flow control valve 35 and the heat pump 50.

As the flow rate control valve 35 is controlled, the flow rate of the groundwater supply to the heat pump 50 is adjusted, and preferably, the control of the submersible motor pumps 11 and 21 installed in the cold water well 10 and the hot water well 20 is performed. Controlled together, the groundwater supply flow rate is regulated. Also preferably, a pressure pump 39 is further provided on the ground water supply line 30a for supplying ground water pumped to the heat pump 50.

In one embodiment of the present invention, the heat pump 50 transfers the cold heat of the cold heat ground water pumped from the cold water well 10 to the storage heat medium 71, and the heat of the warm ground water pumped from the hot water well 20 Transfer to the storage heat medium (71). The configuration of the heat pump 50 will be described with reference to FIG. 4.

Referring to FIG. 4, the heat pump 50 includes a first heat exchanger 51, a second heat exchanger 53, a compressor 55, an expansion valve 57, and a heat pump direction control valve 59. Is done. Furthermore, preferably, the heat pump 50 further includes an accumulator 52, an oil separator 54, a receiver 56, a filter drier 58, and a liquid level gauge 60. It is done by

The first heat exchanger 51 acts as a condenser during summer cooling and as an evaporator during winter heating to heat the refrigerant with the pumped groundwater.

The second heat exchanger 53 acts as an evaporator during summer cooling, and acts as a condenser during winter heating to heat-exchange the refrigerant and the storage heat medium 71 to accumulate cold heat and heat with the storage heat medium 71.

In addition, as shown in Figure 4, the temperature sensor (66a, 66b) for detecting the temperature of the refrigerant is installed on the inlet side and the discharge side of the first heat exchanger 51, the second exchanger 53

Temperature sensors

65a and 65b are installed on the inflow side and the discharge side to detect the temperature of the refrigerant The temperature of the refrigerant measured by the

temperature sensors

65a, 65b, 66a and 66b is controlled by the heat pump in the controller 40. It is used as information for controlling 50.

The compressor 55 compresses the refrigerant and discharges the refrigerant to a heat exchanger serving as a condenser. Preferably, referring to FIG. 4, the high pressure gauge 63 is installed on the pipeline discharged from the compressor 55, and the low pressure gauge 64 is installed on the pipeline flowing into the compressor 55. 62 is installed to protect the compressor 55 and the heat pump 50 by shutting off the hip pump relay power (not shown) when the pressure of the refrigerant is too high or low.

Also, preferably, a temperature sensor is installed at the inflow side to the compressor 55 and the discharge side conduit from the compressor 55 to measure the temperature of the refrigerant flowing into or out of the compressor 55.

The expansion valve 57 expands the refrigerant passing through the heat exchanger acting as a condenser and sends it to the heat exchanger acting as an evaporator. Preferably, two expansion valves 57a are operated when the first heat exchanger 51 acts as a condenser and two expansion valves 57b are operated when the second heat exchanger 53 acts as a condenser.

The heat pump direction control valve 59, preferably the four-way solenoid valve, controls the flow direction of the refrigerant so that the first heat exchanger 51 and the second heat exchanger 53 alternately act as condensers and evaporators.

Referring to FIG. 4, when the first heat exchanger 51 acts as a condenser, the heat pump direction control valve 59 sends the refrigerant discharged from the compressor 55 to the first heat exchanger 51. When the second heat exchanger 53 acts as a condenser, the heat pump direction control valve 59 has a refrigerant flow direction to direct the refrigerant discharged from the compressor 55 to the second heat exchanger 53. Is switched.

The liquid separator 52 is installed before the compressor 55 and protects the compressor 55 by preventing liquid back to the compressor 55. The oil separator 54 is installed after the compressor 55 to return oil contained in the refrigerant discharged from the compressor 55 to the compressor 55.

In addition, a receiver 56 is provided between the heat exchanger serving as a condenser and the expansion valve 57. The receiver 56 temporarily stores the refrigerant liquid condensed in the condenser and sends only the refrigerant required by the evaporator to the expansion valve 57, and serves as a kind of safety device.

A filter drier 58 and a sight glass 60 installed after the receiver 56 are installed. The filter drier 58 filters out various foreign matters inside the system. Through the liquid level gauge 60, the injection amount and state of the refrigerant can be directly checked.

Preferably, the temperature information detected by the

temperature sensors

65a, 65b, 66a, 66b installed on the first or / and second heat exchanger 51 side and / or the temperature sensors installed on the compressor 55 side. Based on the control unit 40 controls the heat pump 50.

Preferably, the compression capacity of the compressor 55 and / or the condensation of the first or

second heat exchangers

51 and 53 based on the temperature information detected by the temperature sensors installed in the heat pump 50 and / or The processing capacity of the heat pump 50 can be controlled by controlling the evaporation capacity, the refrigerant speed in the expansion valve 57, and the like. The compression capacity of the compressor 55 and / or the condensation and / or evaporation capacities of the first or

second heat exchangers

51, 53 are transferred to the compressor 55 or / and the first and

second heat exchangers

51, 53. It can be controlled by controlling the provided RPM controllable inverter motor (not shown).

In FIG. 4, reference numeral 61 denotes a check valve.

In addition, in one embodiment of the present invention, the heat storage tank 70 is connected to the heat pump 50 and the heat medium pipe 80, the storage of cold or heat received from the heat pump 50 through the heat medium pipe (80) The heat medium 71 is stored.

Preferably, the storage heat medium 71 is water. The heat medium pipe 80 is formed to circulate the storage heat medium 71 between the heat storage tank 70 and the heat pump 50.

Also preferably, the heat medium pipe 80 is formed such that the storage heat medium 71 heat-exchanged with the heat pump 50 is returned to the lower portion of the heat storage tank 70 during the summer cooling and to the top of the heat storage tank 70 during the winter heating. do.

Preferably, in one embodiment, the heat storage target temperature of the heat storage tank 70 is in the range of 5 to 10 ° C. during summer cooling, and is in the range of 45 to 55 ° C., preferably 45 to 50 ° C. during winter heating.

In one embodiment of the invention, the controller 40 operates the heat pump 50 and pumps ground water from the cold water well 10 and the hot water well 20 and the cold water well 10 according to the set cooling or heating mode. ) And the groundwater injection into the hot water well 20 is automatically controlled.

With reference to Figures 2 to 3 look at more embodiments of the present invention.

Preferably, in one embodiment, the controller 40 stops and restarts the heat pump 50 according to the temperature of the storage heat medium 71 stored in the heat storage tank 70, and the cold water crystal 10 and the ON. Groundwater pumping stops and repumps from the crystal 20 are controlled.

The temperature of the storage heat medium 71 stored in the heat storage tank 70 to be discharged or discharged to the heat pump 50 is relatively high temperature during summer cooling, and relatively low temperature during winter heating. Preferably, the temperature of the storage heat medium 71 circulated is a temperature sensor 85a provided in the discharge side heat medium pipe 80 from the heat storage tank 70 and / or the inlet side heat medium pipe 80 to the heat pump 50. And the temperature sensor 85b provided in the discharge side heat medium pipe 80 from the heat pump 50 and / or the inlet side heat medium pipe 80 to the heat storage tank 70.

Also preferably, referring to FIG. 2, in another embodiment of the present invention, the aquifer heat storage control system further includes an

underwater motor pump

11, 21 and a first circulation pump 81.

More preferably, it further comprises a flow rate control valve 35 installed on the ground water supply pipe (30a) for supplying the ground water pumped by the heat pump (50).

The submersible motor pumps 11 and 21 are installed in the cold water well 10 and the hot water well 20, respectively. Preferably, the submersible motor pumps 11 and 12 are motor pumps in which an inverter is installed to enable RPM control. It is possible to adjust the pumping flow rate by controlling the RPM of the submersible motor pump (11, 21).

Under the control of the controller 40, the submersible motor pumps 11 and 21 installed in the cold water well 10 and the hot water well 20 are alternately operated in accordance with cooling and heating. The submersible motor pump 11 installed in the cold water crystal pump 10 pumps the ground-heat accumulated cold water at the time of cooling, and the submersible motor pump 21 installed in the hot-water well 20 pumps the ground-heat accumulated thermal water at the time of heating. The submersible motor pumps 11 and 21 pump ground water to supply the groundwater pipe 30.

The first circulation pump 81 is provided on the heat medium pipe 80, and the first circulation pump 81 discharges the storage heat medium 71 stored in the heat storage tank 70 to the heat pump 50. Preferably, the first circulation pump 81 is installed on a pipe or a pipe connected to the lower portion of the heat storage tank 70.

Referring to FIG. 3, the controller 40 may include the heat pump 50, the first circulation pump 81, and the submersible motor pump when the temperature of the storage heat medium 71 of the heat storage tank 70 reaches a predetermined target temperature. 11 or 21 are shut down and the heat pump 50, the first circulation pump 81 and the submersible submersible motor pump are stopped when the stored heat medium 71 after the shutdown is out of a predetermined allowable range of the target temperature. Control to restart (11 or 21).

More preferably, the heat storage target temperature of the storage heat medium 71 of the heat storage tank 70 is in the range of 5 to 10 ° C. during summer cooling, and in the range of 45 to 60 ° C. during winter heating.

Furthermore, preferably, a predetermined allowable range for the target temperature

Also, referring to FIG. 3, in one preferred embodiment, the controller 40 controls the submersible motor pumps 11, 21 to adjust the groundwater pumping flow rate from the cold water well 10 or the hot water well 20. Preferably, the submersible motor pump (11, 21), or the flow control valve 35, or the submersible motor pump (11, 21) and the flow control valve 35 to control the cold water crystal 10 or hot water well Groundwater pumping flow rate from 20 is controlled.

And / or, the controller 40 controls the first circulation pump 81 to adjust the circulation flow rate of the storage heat medium (71).

Also preferably, the submersible motor pumps 11 and 21 and the pressurized pump 39 shown in FIG. 2 are controlled or the submersible motor pumps 11 and 21, the flow control valve 35 and the pressurized pump 39 are controlled. To adjust the groundwater pumping flow rate.

With reference to Figure 3 looks at further embodiments of the present invention.

Preferably, in one embodiment of the present invention, the controller 40 shown in FIG. 3 uses the cold water crystal 10 according to the difference between the measured temperature and the set target temperature of the storage heat medium 71 stored in the heat storage tank 70. Or the flow rate of the ground water pumping from the hot water well 20 and / or the circulation flow rate of the storage heat medium 71 to the heat storage tank 70 through the heat medium pipe 80.

The temperature of the storage heat medium 71 stored in the heat storage tank 70 is preferably a temperature of the discharge side heat medium pipe 80 from the heat storage tank 70 and / or the inlet side heat medium pipe 80 to the heat pump 50. It is measured by the sensor 86a. In this case, the preferable heat storage target temperature of the storage heat medium 71 of the heat storage tank 70 is in the range of 5 to 10 ° C. during summer cooling, and in the range of 45 to 55 ° C., preferably 45 to 50 ° C. during winter heating.

Further preferably, in another embodiment, the controller 40 is the temperature of the storage heat medium 71 introduced into or introduced into the heat storage tank 70 and the storage heat medium 71 to be discharged from or discharged from the heat storage tank 70. Circulating flow rate of the ground water pumping flow from the cold water well 10 or the hot water well 20 and / or the storage heat medium 71 to the heat storage tank 70 through the heat medium pipe 80 according to the temperature difference of have.

More preferably, in another embodiment, the controller 40 of FIG. 3 is dependent on the temperature of the groundwater pumped from the cold water well 10 or the hot water well 20, more preferably, the cold water well 10 Or groundwater pumping flow rate from the cold water well (10 or hot water well 20), depending on the temperature of the ground water pumped from the hot water well (20) and the temperature of the ground water that is injected into the hot water well (20) or cold water well (10) and The circulation flow rate of the storage heat medium to the heat storage tank 70 through the heat medium pipe 80 is controlled.

3 and 4, the temperature of the groundwater pumped from the cold water well 10 or the hot water well 20 is the inlet side groundwater supply line 30a to the heat pump 50 or / and the cold water well 10 being pumped. Or by the temperature sensor 36a installed in the hot water well 20, the temperature of the ground water injected into the hot water well 20 or the cold water well 10 is discharged from the heat pump 50 to the groundwater recovery pipe line 30b. Or / and groundwater is recovered and measured by the temperature sensor 36b installed in the cold water well 10 or the hot water well 20 which is undergoing heat storage.

Preferably, the groundwater in consideration of not only the temperature of the groundwater to be pumped but also the temperature difference between the inflow and discharge of the storage heating medium 71 or the difference between the target temperature and the measurement temperature of the storage heating medium 71 in the aforementioned embodiments, The pumping flow rate and / or the circulation flow rate of the storage heating medium 71 is controlled.

Further preferably, in one embodiment, the controller 40 of FIG. 3 is characterized in that the temperature difference in the storage heat medium 71 (the temperature difference between the storage heat medium 71 introduced and discharged) in the above-described embodiments. Or the difference between the target temperature and the measured temperature) and / or the ground water pumping flow rate and / or the circulation flow rate of the storage heat medium 71 according to the temperature of the ground water.

The controller 40 controls the compression capacity of the compressor 55 and / or the condensation and / or evaporation capacity of the first or

second heat exchangers

51 and 53, the refrigerant velocity in the expansion valve 57, and the like. The processing capacity of the heat pump 50 can be controlled. Preferably, the compression capacity of the compressor 55 and / or the condensation and / or evaporation capacity of the first or

second heat exchangers

51 and 53 can be controlled by controlling the inverter motor with RPM speed control. In this case, the inverter motor is provided in the compressor 55 and / or the first and

second heat exchangers

51 and 53.

2 and 3, embodiments of the present invention are further described.

Referring to FIG. 2, the aquifer storage control system according to another preferred embodiment further includes

shutoff valves

31 and 33, a cooling and heating conduit 90, and a second circulation pump 91.

Shut-off

valves

31 and 33 are installed on the groundwater pipe 30. The ground water pipe 30 includes a ground water supply pipe 30a for supplying ground water to the heat pump 50 and a ground water recovery pipe 30b for recovering ground water from the heat pump 50.

The groundwater supply line 30a and the groundwater recovery line 30b may form independent lines up to each well 10 and 20, as shown in FIG. 2, or as illustrated in FIG. 1, an underwater motor pump ( 11, 21) can be combined with the piping.

The

shutoff valves

31 and 33 are installed in the groundwater supply line 30a and the groundwater recovery line 30b. The shut-off valve (s) 31 installed in the groundwater supply line 30a are groundwater supply pipes from the hot water wells 20 during the summer cooling and from the cold water wells 10 during the winter heating under the control of the controller 40. The furnace 30a is blocked. Preferably, the shutoff valve 31 installed on the ground water supply line 30a is a remote control check valve. The shut-off valve (s) 33 installed in the groundwater recovery pipe line 30b are, depending on the control of the controller 40, the groundwater recovery pipe line to the hot water well 20 for cooling and to the cold water well 10 for heating. Block 30b. The shut-off valve (s) 33 installed on the groundwater recovery line 30b are preferably a remote control check valve.

The air conditioning and heating pipe (90) circulates the storage heat medium (71) of the cold or hot heat stored in the heat storage tank (70) to a heating and cooling facility such as a fan coil unit (FCU).

Preferably, the cooling and heating pipe (90) is formed so that the storage heat medium (71) is discharged from the lower part of the heat storage tank (70) during the summer cooling, and the upper part of the heat storage tank (70) during the winter heating.

The second circulation pump 91 is installed on the cooling and heating conduit 90, and the second circulation pump 91 discharges the storage heat medium 71 stored in the heat storage tank 70 to the building air conditioning equipment side. Preferably, the second circulation pump 91 is also controlled by the controller 40.

Also preferably, the second circulation pump 91 is installed on a pipe or a pipe connected to the lower portion of the heat storage tank 70. Preferably, between the heat storage tank 70 and the second circulation pump 91 is provided with a cooling and heating piping direction control valve 93, for example a four-way solenoid valve, so that the discharged position can be changed.

Also referring to FIG. 2, in another preferred embodiment, a heat pipe direction control valve 83 is further provided.

The heat medium pipe direction control valve 83 controls the heat storage medium 71 heat-exchanged with the heat pump 50 to the lower part of the heat storage tank 70 during the summer cooling, and the heat storage tank during the winter heating according to the control of the controller 40. The flow direction of the heat medium pipe 80 is controlled to be returned to the upper portion of the 70. Preferably, the heat medium pipe direction control valve 83 is a four-way solenoid valve.

The high temperature storage heat medium 71a is stored in the upper part of the heat storage tank 70, and the low temperature storage heat medium 71b is stored in the lower part, and stratified. In the hot and cold storage

thermal mediums

71a and 71b to be stratified, high and low temperatures are a relative concept.

Although not shown in FIG. 2, preferably, in another embodiment of the present invention, a pressurized pump is further provided on the groundwater recovery pipe line 30b for injecting heat-exchanged groundwater into the cold water well 10 and the hot water well 20. It is provided, it is possible to inject the ground water exchanged.

Also preferably, a packer (not shown) through which the groundwater supply line 30a and the groundwater recovery line 30b pass through the groundwater surface G of the underground aquifer, respectively, of the cold water well 10 and the hot water well 20. Is installed or a cover or cover box (not shown) is installed on the top of the well so that the inside of the well is sealed except the pipeline. The packer or cover, the cover box maintains watertightness, to enable the pressurized injection of groundwater by the pressure pump.

In the above, the present invention has been described with reference to the preferred embodiments with reference to the accompanying drawings. The accompanying drawings and the foregoing embodiments are described by way of example to help those skilled in the art to understand the present invention. Therefore, various embodiments of the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention, the foregoing embodiments are to be considered as illustrative and not restrictive.

Therefore, the scope of the present invention should be interpreted according to the invention described in the appended claims rather than the above-described embodiments, and various modifications, alternatives, and equivalents described by those skilled in the art are described above. It is obvious that it is included in the scope of the.

The present invention relates to aquifer heat storage control system and is industrially useful.

Claims

Cold water crystal is formed in the underground aquifer, the ground water is pumped cold cooling during summer cooling, the ground water is deprived of heat during winter heating is cold storage heat storage;

A hot water well formed in an underground aquifer and spaced apart from the cold water well by a predetermined distance, the hot water well being pumped and heated by the ground water absorbing heat during the summer cooling;

An underground water pipe for supplying ground water pumped from the cold water well and the hot water well to a heat pump, and recovering ground water heat exchanged from the heat pump to be injected into the hot water well and the cold water well;

A heat pump transferring the cold heat of the cold heated groundwater pumped from the cold water well to the storage heat medium, and transferring the heat of the heated groundwater pumped from the hot water well to the storage heat medium;

A heat storage tank connected to the heat pump and the heat medium pipe, and storing a storage heat medium of cold heat or heat received from the heat pump through the heat medium pipe; And

A controller for automatically controlling the operation of the heat pump, the groundwater pumping from the cold and hot water wells, and the groundwater injection into the cold and hot water wells according to a set cooling or heating mode; Aquifer storage control system using a, including the underground aquifer as a cold storage heat storage.
The system of claim 1, wherein the aquifer heat storage control system is:

An underwater motor pump installed in each of the cold water well and the hot water well, and pumping the ground water accumulated in the cold heat during cooling and the ground water accumulated in the heat during heating to supply to the ground water pipe; And

A first circulation pump installed on the heat medium pipe and discharging the storage heat medium to the heat pump; It is made, including more

The controller stops the operation of the heat pump, the first circulation pump and the submersible motor pump when the temperature of the storage heat medium of the heat storage tank reaches a predetermined target temperature, and after the operation stops, the stored storage heat medium becomes the target. And the heat pump, the first circulation pump and the submersible submersible motor pump are restarted when the temperature is out of a predetermined allowable range.
The method according to claim 2,

The heat storage target temperature of the storage heat medium of the heat storage tank is in the range of 5 to 10 ℃ during summer cooling, and in the range of 45 to 50 ℃ during winter heating,

The predetermined allowable range
Is + (4 ~ 6) ℃ when cooling,-(4 ~ 6) ℃ heating is aquifer heat storage control system, characterized in that.
The method according to claim 1,

The controller may be a pumped flow rate of groundwater from the cold or hot water well, or a circulation flow rate of the storage heat medium to the heat storage tank through the heat medium pipe according to a difference between the measured temperature of the storage heat medium stored in the heat storage tank and a set target temperature. Or the groundwater pumping flow rate and the circulation flow rate of the storage heating medium.
The method according to claim 1,

The controller may be a flow rate of groundwater pumping from the cold or hot water wells, or the heat medium pipe through the heat medium pipe depending on the temperature of the ground water pumped from the cold or hot water wells and the temperature of the ground water injected into the hot or cold water wells. Aquifer heat storage control system for controlling the circulation flow rate of the storage heat medium to the heat storage tank, or the flow rate of the groundwater pumping and the circulation flow rate of the storage heat medium.
The method according to claim 4 or 5,

The controller may be configured to control the pumping flow rate, the circulation flow rate, or the pumping and circulation flow rate according to a difference in temperature in the storage heating medium or according to the temperature of the pumped ground water and the injected ground water. Aquifer storage control system, characterized in that for controlling the processing capacity of the heat pump.
The method of claim 4 or 5, wherein the aquifer heat storage control system is:

An underwater motor pump installed in the cold water well and the hot water well, respectively, for pumping ground water that is cold-heat-generated during cooling, and ground water that is heat-heat-heating when heated; And

A first circulation pump installed on the heat medium pipe and discharging the storage heat medium to the heat pump; It is made, including more

Wherein the controller controls the submersible motor pump to control the flow rate of the groundwater pumping from the cold or hot water wells, and to control the first circulation pump to adjust the circulation flow rate of the storage heat medium. Control system.
The system of claim 1, wherein the aquifer heat storage control system is:

Underwater motor pump is installed on the groundwater pipeline, and under the control of the controller, the groundwater supply pipe connected to the pumping stop the underwater motor pump and the groundwater recovery pipe to the cold water or hot water well being pumped and at the same time pumping the underwater motor pump Shut-off valves for opening the groundwater supply pipe connected to the ground and the groundwater recovery pipe to the cold water or hot water well stopped pumping;

A cooling and heating conduit for circulating the heat storage medium of cold or warm heat of the heat storage tank to exchange heat with the building air conditioning equipment; And

A second circulation pump installed on the air conditioning pipe and discharging the storage heating medium to the building air conditioning equipment; Aquifer heat storage control system, characterized in that further comprises.
The method according to claim 8,

Heat medium pipe direction control for controlling the flow direction of the heat medium pipe according to the control of the controller so that the storage heat medium heat exchanged with the heat pump is returned to the lower portion of the heat storage tank during the summer cooling, and to the top of the heat storage tank during the winter heating Further provided with a valve,

The heat storage control system, characterized in that the heat storage is made so that the storage heat medium stored in the heat storage tank gradually becomes uniform after stratification.
The method according to any one of claims 1 to 5,

The target temperature of the cold water crystal used as the heat storage body as the heat storage body is in the range of 5 to 10 ° C, and the target temperature of the hot water crystal as the heat storage body is in the range of 20 to 30 ° C.