CN211854504U - Underground energy storage system with double liquid storage cavity structure - Google Patents
Underground energy storage system with double liquid storage cavity structure Download PDFInfo
- Publication number
- CN211854504U CN211854504U CN201922257536.2U CN201922257536U CN211854504U CN 211854504 U CN211854504 U CN 211854504U CN 201922257536 U CN201922257536 U CN 201922257536U CN 211854504 U CN211854504 U CN 211854504U
- Authority
- CN
- China
- Prior art keywords
- cavity
- energy storage
- fluid pipe
- working medium
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 136
- 239000007788 liquid Substances 0.000 title claims abstract description 60
- 239000012530 fluid Substances 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008859 change Effects 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 8
- 230000009977 dual effect Effects 0.000 claims description 5
- 239000011550 stock solution Substances 0.000 abstract description 17
- 238000012546 transfer Methods 0.000 abstract description 13
- 238000004321 preservation Methods 0.000 abstract description 3
- 239000012071 phase Substances 0.000 description 25
- 230000009471 action Effects 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000005338 heat storage Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009711 regulatory function Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to the technical field of underground energy storage, in particular to an underground energy storage system with a double-liquid storage cavity structure, which comprises an energy storage body, an underground energy storage cavity, a heat preservation layer and a heat exchanger; the underground energy storage cavity is arranged in the energy storage body, a vacuum pump is arranged in a second cavity of the underground energy storage cavity, the vacuum pump is communicated with the telescopic air cavity through a first air pipe, and the first air pipe is connected with a second air pipe; the first cavity is communicated with the third cavity through a third fluid pipe, the upper portion of the first cavity is communicated with the lower end of the first fluid pipe, the upper end of the first fluid pipe is connected with the heat exchanger, the heat exchanger is connected with one end of the second fluid pipe, the other end of the second fluid pipe enters the first cavity, a third electromagnetic valve is arranged on the second fluid pipe, and a variable frequency working medium pump is arranged on the bypass. The utility model discloses first cavity has high volume heat transfer coefficient, can realize high-efficient heat transfer and energy storage, and the third cavity can be used to the regulation and control of the outer stock solution chamber liquid measure of storage and the energy storage in-process of working medium.
Description
Technical Field
The utility model relates to an underground energy storage technical field, more specifically say so, relate to an underground energy storage system with two stock solution chamber structures.
Background
In recent years, underground energy storage systems are receiving wide attention at home and abroad due to good economic effects and wide application prospects of energy storage technologies. Underground energy storage systems can be divided into active and passive types according to different system driving modes (phase change and water pump) and different circulating heat exchange media (phase change and non-phase change). Among them, active underground energy storage systems have been widely used, including: underground aquifer energy storage (ATES), buried pipe energy storage (BTES), Water Tank Energy Storage (WTES), gravel-water energy storage (GWES) and the like. Nevertheless, active underground energy storage also exposes problems in practice, such as: the system completely drives a circulating working medium to flow through an underground space by a water pump to perform heat exchange and energy storage, so that the driving power consumption is high, and the energy storage energy efficiency ratio (the ratio of the energy storage to the energy storage power consumption) is low; meanwhile, the circulating working medium in the system is a non-phase-change working medium, and the underground heat exchange and energy storage process is completed in a sensible heat exchange mode, so that the heat exchange and energy storage efficiency is lower, the effective utilization rate of a cold and heat source at the supply side is low, the energy consumption of the system is further increased, and the energy storage energy efficiency ratio is further reduced. In this context, the concept of passive underground energy storage systems is emerging.
The passive underground energy storage system mainly utilizes the phase change drive of a phase change working medium to complete the energy storage process, and can complete the underground heat exchange energy storage process without the drive of a water pump, so the drive power consumption of the system is greatly reduced, and the energy storage energy efficiency ratio is greatly improved; meanwhile, the latent heat exchange mode is adopted to complete the underground energy storage and heat exchange process, so that the energy storage and heat exchange efficiency is greatly improved compared with that of an active system. However, the current passive underground energy storage system still has a plurality of technical problems to be solved due to the structural limitation and the lack of theoretical guidance.
Firstly, due to the limitation of the structure of the passive underground energy storage system, the volume heat exchange coefficient (defined as the ratio of the volume of the phase change working medium to the corresponding effective heat exchange area) of the passive underground energy storage system is extremely low, so that the heat exchange energy storage efficiency and the energy storage energy efficiency ratio of the underground energy storage system cannot be reflected, and the technical advantages of the passive underground energy storage system are weakened. In fact, in the cold storage or heat storage process, the latent heat exchange in the underground energy storage heat exchange cavity of the passive underground energy storage system basically concentrates on the inner wall heat transfer boundary layer and the adjacent area thereof, and most of the space in the cavity does not directly contact the heated or cooled wall and only depends on the heat transferred to the cavity through heat conduction and convection for heat exchange, so that the ratio of the invalid heat exchange working medium in the underground energy storage heat exchange cavity is extremely high, and the heat exchange efficiency of the whole system, particularly the heat exchange efficiency in the cavity is extremely low. Therefore, the structural design and the system design of the underground energy storage heat exchange cavity are particularly critical to the heat exchange efficiency of the passive underground energy storage system, the efficient heat exchange energy storage of the passive underground energy storage system is also inseparable from the effective utilization rate of the cold and heat sources at the supply side, the energy storage efficiency of the passive underground energy storage system and the energy storage energy efficiency, and the lower heat exchange efficiency can greatly reduce the technical effects and the advantages of the passive underground energy storage system.
In addition, the current passive underground energy storage system cannot regulate and control different requirements such as energy storage amount (namely energy storage capacity, mainly referring to the energy size stored by the system) and quality (namely energy storage quality, mainly referring to the grade of the energy stored by the system). In practical engineering applications, the energy storage system often needs to adjust the energy storage target of the energy storage system according to different requirements of a user side. However, in both active and passive underground energy storage systems, the prior art mainly meets the requirements of the user side on different energy storage "quantities" and "qualities" by increasing the flow of the cold and heat sources or the quality of the cold and heat sources at the supply side, which results in a great increase in the cost and expense of the supply side under the required energy storage target, and further causes an increase in the energy storage loss of the energy storage system. Therefore, the active and passive underground energy storage systems (especially passive underground energy storage systems) at present lack a technical means for realizing different energy storage targets such as energy storage 'quantity' and 'quality' only through the self regulation and control of the underground energy storage systems under the condition of not changing the given conditions of the supply side.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the technical defect who exists among the prior art, and provide an underground energy storage system with two stock solution chamber structures, by a wide margin the "volume heat transfer coefficient" of lift system realizes effectively promoting passive form underground energy storage system's heat transfer and energy storage efficiency and application and promotion value to the dynamic regulation and control of system's liquid measure under the different energy storage modes simultaneously.
For realizing the utility model discloses a technical scheme that the purpose adopted is: an underground energy storage system with a double-liquid storage cavity structure comprises an energy storage body, an underground energy storage cavity, a heat insulation layer and a heat exchanger; the buried energy storage cavity is arranged in the energy storage body, and the insulating layer covers the energy storage body and the upper part of the buried energy storage cavity;
the underground energy storage cavity is of a multi-cavity structure and is composed of an inner cavity and an outer cavity in the radial direction, wherein the outer cavity is a first cavity, the inner cavity is further divided into an upper cavity and a lower cavity in the axial direction, the upper cavity is a second cavity, and the lower cavity is a third cavity;
a support is arranged on the inner wall of the second cavity, a vacuum pump is mounted on the support, the vacuum pump is communicated with a telescopic air cavity in the third cavity through a first air pipe, a second electromagnetic valve is mounted on the first air pipe, a second air pipe is connected to the side of the first air pipe, and a fourth electromagnetic valve is mounted on the second air pipe below the second electromagnetic valve;
the first cavity is communicated with the third cavity through a third fluid pipe, a first electromagnetic valve is installed on the third fluid pipe, liquid level scales and a corresponding liquid level sensor are arranged on the outer side wall surface of the first cavity, one end of the first fluid pipe is connected with a first working medium interface of the heat exchanger, the other end of the first fluid pipe penetrates through the heat insulation layer to enter the first cavity, the end surface of a pipe orifice of the first fluid pipe is positioned at the upper part of the first cavity and is higher than the first liquid level sensor, a second working medium interface of the heat exchanger is connected with one end of a second fluid pipe, the other end of the second fluid pipe penetrates through the heat insulation layer to enter the first cavity, the lower end of the pipe orifice of the second fluid pipe is immersed below the liquid level of a phase-change working medium and is lower than the second liquid level sensor, the second fluid;
a first temperature sensor is arranged in the middle of the heat exchanger, a second temperature sensor is arranged at the upper part of the inner side wall surface of the first cavity, and a third temperature sensor is arranged at the lower part of the inner side wall surface of the first cavity;
phase change working media are filled in the first cavity and the third cavity;
the first to third temperature sensors, the first to fourth electromagnetic valves, the first to third liquid level sensors, the variable frequency working medium pump and the vacuum pump are respectively connected with the controller through signal lines.
Preferably, a working medium filling port is arranged on the first fluid pipe.
Preferably, a filter is connected to the lower end of the nozzle of the second fluid pipe.
Preferably, the ratio of the inner diameter to the outer diameter of the first cavity is in the range of 0.75-0.95.
Preferably, the volume ratio of the second cavity to the third cavity ranges from 0.11 to 0.78.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses underground energy storage system's underground energy storage cavity with two stock solution chamber structures has adopted inside and outside two stock solution chamber designs, and outer stock solution chamber (first cavity) has very high "volume heat transfer coefficient" (can promote 9.1-41 times), can realize high-efficient heat transfer and energy storage, and inside stock solution chamber (third cavity) has liquid measure regulatory function, can be used to the regulation and control of the outer stock solution chamber liquid measure of storage and energy storage in-process of working medium. The utility model discloses at heat-retaining and cold storage in-process, the heat transfer of phase transition working medium and energy storage body is concentrated and is taken place in high volume heat transfer coefficient space (first cavity), has promoted unit volume working medium transmission energy's ability by a wide margin, has reduced the required working medium of system from this by a wide margin and has filled the notes volume (reducible 56.75-90.25%). In addition, according to the difference of demand side demand (energy storage "volume" or "matter") in the application, the utility model discloses the accessible carries out the developments regulation and control to outer stock solution chamber working medium liquid level at energy storage in-process, realizes the intelligent switching of different demands such as energy storage "volume" and energy storage "matter", has promoted the application and popularization value of system by a wide margin.
Drawings
FIG. 1 is a schematic view of an underground energy storage system with a dual reservoir structure according to the present invention;
FIG. 2 is a schematic diagram of the operation of the underground energy storage system with a double-liquid storage cavity structure in cold storage season;
FIG. 3 is a schematic diagram of the operation of the underground energy storage system with a double liquid storage cavity structure in the heat storage season;
1. an energy storage body; 2. an underground energy storage cavity; 3. a heat-insulating layer; 4. a first cavity; 5. a heat exchanger; 6. a first fluid tube; 7. a second fluid tube; 8. a second cavity; 9. a third cavity; 10. a telescopic air cavity; 11. a first solenoid valve; 12. a second solenoid valve; 13. working medium; 14. a vacuum pump; 15. a support; 16. a filter; 17. a variable frequency working medium pump; 18. a third electromagnetic valve; 19. a controller; 20. an inlet of the heat exchanger; 21. an outlet of the heat exchanger; 22. a first gas pipe; 23. a second gas pipe; 24. a fourth solenoid valve; 25. a first temperature sensor; 26. a second temperature sensor; 27. a third temperature sensor; 28. a third fluid pipe; 29. a working medium filling port; A. a first liquid level sensor; B. a second liquid level sensor; C. a third liquid level sensor.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model discloses an underground energy storage system with two stock solution chamber structures schematic diagram is shown in fig. 1, bury energy storage chamber 2, heat preservation 3, heat exchanger 5, fluid pipeline and corresponding data monitoring and control execution system including the energy storage body 1, ground. The energy storage body 1 is provided with a drill hole, the underground energy storage cavity 2 is arranged in the drill hole, and the upper parts of the energy storage body 1 and the underground energy storage cavity 2 are covered with the heat preservation layer 2. The underground energy storage cavity 2 is of a multi-cavity structure and is composed of an inner cavity and an outer cavity in the radial direction, wherein the outer cavity is a first cavity 4, the inner cavity is further divided into an upper cavity and a lower cavity in the axial direction, the upper cavity is a second cavity 8, and the lower cavity is a third cavity 9. The inner wall of the second cavity 8 is provided with a support 15, a vacuum pump 14 is mounted on the support, and the support is communicated with a telescopic air cavity 10 in the third cavity 9 through a first air tube 22. A second electromagnetic valve 12 is arranged on the main pipeline of the first air pipe 22, and a second air pipe 23 and a fourth electromagnetic valve 24 are connected to the first air pipe 22 below the second electromagnetic valve 12. The first cavity 4 and the third cavity 9 are communicated through a third fluid pipe 28, and the first solenoid valve 11 is mounted on the third fluid pipe 28. And the outer side wall surface of the first cavity 4 is sequentially provided with a first liquid level sensor A, a second liquid level sensor B and a third liquid level sensor C from top to bottom. A working medium filling port 29 is formed in the first fluid pipe 6, one end of the first fluid pipe 6 is connected with a first working medium interface of the heat exchanger 5, the other end of the first fluid pipe penetrates through the heat insulation layer 3 to enter the first cavity 4, and the end face of the pipe orifice of the first fluid pipe is positioned on the upper portion of the first cavity 4 and is higher than the first liquid level sensor A. One end of the second fluid pipe 7 is connected with a second working medium interface of the heat exchanger 5, the other end of the second fluid pipe penetrates through the heat insulation layer 3 to enter the first cavity 4, and the lower end of the pipe orifice of the second fluid pipe is connected with the filter 16 and is immersed below the liquid level of the phase change working medium 13 and lower than the second liquid level sensor B. And a third electromagnetic valve 18 is arranged on the main pipeline of the second fluid pipe 7, and a variable-frequency working medium pump 17 is arranged on the bypass pipeline. The first cavity 4 and the third cavity 9 are filled with phase change working medium 13. A first temperature sensor 25 is arranged in the middle of the heat exchanger 5, a second temperature sensor 26 is arranged on the upper portion of the inner side wall surface of the first cavity 4, and a third temperature sensor 27 is arranged on the lower portion of the inner side wall surface of the first cavity. The temperature sensor, the electromagnetic valve, the liquid level sensor and the variable frequency water pump are all connected with the controller 19 through signal lines.
The ratio of the inner diameter to the outer diameter of the first cavity is 0.75-0.95, and the ratio is larger in practical application under the condition that the conditions allow.
The volume ratio of the second cavity to the third cavity ranges from 0.11 to 0.78, and a smaller value should be selected in practical application under the condition that the conditions allow.
The utility model discloses an energy storage system with two stock solution chamber structures divide into cold storage mode, heat-retaining mode and three kinds of modes of liquid measure regulation and control in the operation process.
Cold storage mode: the controller 19 issues a cold storage mode preparation command to sequentially open the first solenoid valve 11 and the fourth solenoid valve 24 in fig. 2, while the other solenoid valves remain closed. Under the action of the pressure difference between the second cavity 8 and the third cavity 9, the telescopic air cavity 10 expands rapidly and extrudes the working medium 13 in the third cavity 9 into the first cavity 4 rapidly. When the liquid level reaches the first liquid level sensor a, the first solenoid valve 11 and the fourth solenoid valve 24 are sequentially closed, and the third solenoid valve 18 is simultaneously opened, so that the preparation of the cold storage mode is completed.
After the preparation of the cold storage mode is completed, all the phase change working media 13 in the first cavity 4 are rapidly heated by the heat from the energy storage body 1 at the outer side wall surface due to the narrow space of the first cavity 4. And then the phase-change working medium 13 absorbs heat in a limited space in a pool boiling phase-change heat exchange mode, changes phase and evaporates into steam, and the generated steam is rapidly gathered in the upper space of the first cavity 4 and enters the heat exchanger 5 through the first fluid pipe 6 under the action of phase-change force. The steam entering the heat exchanger 5 is condensed into liquid working medium through phase change under the cooling effect of the cold fluid at the heat exchanger inlet 20, and then flows back to the first cavity 4 through the second fluid pipe 7 under the action of gravity. In the above process, the controller 19 monitors the difference between the evaporation temperature of the working medium in the first cavity 4 and the condensation temperature of the working medium in the heat exchanger 5 in real time by the first temperature sensor 25 and the second temperature sensor 26, and the temperature difference between the two temperatures should be kept at 2.5 ℃ to 3.5 ℃. If the monitoring value is larger than the value, the phase change working medium 13 is fully phase-changed and condensed and is further cooled into a supercooled liquid working medium by a saturated liquid working medium, which indicates that the flow of a cold fluid loop of the heat exchanger 5 is overlarge and the cooling capacity is excessive, the power of a cold fluid loop water pump of the heat exchanger is correspondingly reduced, and the cooling capacity of the heat exchanger is reduced; if the monitoring value is smaller than the value and even close to zero, the phase change working medium 13 is not fully phase-changed and condensed into a saturated liquid working medium and even still remains a vapor phase change working medium or a gas-liquid two-phase mixed state, which indicates that the flow of the cold fluid loop of the heat exchanger 5 is too small and the cooling capacity is insufficient, and the power of the water pump of the cold fluid loop of the heat exchanger is correspondingly improved, so that the cooling capacity of the heat exchanger is improved.
A heat storage mode: the controller 19 issues a heat storage mode preparation command to sequentially open the first electromagnetic valve 11 and the third electromagnetic valve 12 in fig. 3, the other electromagnetic valves remain closed, and the vacuum pump 14 is started. Under the action of the vacuum pump 14, the telescopic air cavity 10 is rapidly reduced, and the working medium in the first cavity 4 flows back to the third cavity 9 through the third fluid pipe 28 under the combined action of gravity and the pressure difference between the second cavity 8 and the third cavity 9. And when the liquid level reaches the second liquid level sensor B, closing the first electromagnetic valve 11 and the third electromagnetic valve 24 in sequence, and starting the variable frequency working medium pump 17 to finish the preparation of the heat storage mode.
After the preparation of the heat storage mode is completed, under the driving of the variable frequency working medium pump 17, the phase change working medium 13 in the first cavity 4 is rapidly pumped into the heat exchanger 5 through the second fluid pipe 7, and is subjected to heat absorption phase change evaporation to form steam under the heating action of the hot fluid introduced into the inlet 20 of the heat exchanger, and the generated steam enters the first cavity 4 through the first fluid pipe 6 under the action of the phase change force. Because the space of the inner wall surface and the outer wall surface of the first cavity 4 is narrow, steam can be quickly transmitted into the whole first cavity 4, and is cooled by the cold wall surface to rapidly change phase and condense into liquid working medium in the 'limited space', and finally flows back to the bottom of the first cavity 4 under the action of gravity. In the above process, the controller 19 monitors the difference between the condensation temperature of the working medium in the first chamber 4 and the evaporation temperature in the heat exchanger 5 in real time by the first temperature sensor 25 and the third temperature sensor 27, and the temperature difference between the two should be kept at 2.5 ℃ to 3.5 ℃. If the monitoring value is larger than the value, the phase change working medium 13 pumped into the heat exchanger 5 is fully subjected to phase change evaporation and is further heated into an overheated steam working medium by a saturated steam working medium, which indicates that the flow of a hot fluid loop of the heat exchanger 5 is overlarge and the heating capacity is excessive, the water pump power of the hot fluid loop of the heat exchanger 5 is correspondingly reduced, and the heating capacity of the heat exchanger is reduced; if the monitoring value is smaller than the value and even close to zero, the phase change working medium 13 is not fully phase-changed and evaporated into a saturated vapor working medium and even still is a liquid phase change working medium or a gas-liquid two-phase mixed state, which indicates that the flow of the hot fluid loop of the heat exchanger 5 is too small and the heating capacity is insufficient, and accordingly, the power of the water pump of the hot fluid loop of the heat exchanger 5 is increased, and the heating capacity of the heat exchanger is increased.
In the running process of the cold storage mode and the heat storage mode, the liquid quantity regulating function can be started according to the requirement change of the requirement side. If the actual cold storage mode carries out the in-process and needs to promote the cold-storage quality (further reduce energy storage body energy storage temperature promptly), then the utility model discloses will carry out the system liquid measure regulation and control and realize further reducing the target of energy storage body temperature through concentrating the mode of storing cold volume in 1 lower part of the energy storage body. At this time, the controller 19 issues a cold storage liquid amount control command, and opens the first electromagnetic valve 11 and the second electromagnetic valve 12 in sequence in fig. 2, the other electromagnetic valves remain closed, and the vacuum pump 14 is started. Under the action of the vacuum pump 14, the telescopic air cavity 10 is rapidly reduced, and the working medium in the first cavity 4 flows back to the third cavity 9 through the third fluid pipe 28 under the combined action of gravity and the pressure difference between the second cavity 8 and the third cavity 9. And after the liquid level reaches the third liquid level sensor C or further reaches the second liquid level sensor B from the first liquid level sensor A, closing the first electromagnetic valve 11 and the second electromagnetic valve 12 in sequence, starting the variable-frequency working medium pump 17, and finishing the preparation of regulating and controlling the amount of the cold storage liquid. Similarly, if the actual heat-retaining mode carries out the in-process and needs further promote the heat accumulation quality (further promote energy storage body energy storage temperature promptly), then the utility model discloses will carry out the system liquid measure regulation and control and realize further promoting the target of energy storage body temperature through the mode of storing the heat in energy storage body 1 upper portion in a concentrated manner. At this time, the controller 19 issues a heat storage liquid amount control command, and opens the first electromagnetic valve 11 and the fourth electromagnetic valve 24 in fig. 3 in sequence, and the other electromagnetic valves remain closed. Under the action of the pressure difference between the second cavity 8 and the third cavity 9, the telescopic air cavity 10 expands rapidly and extrudes the working medium 13 in the third cavity 9 into the first cavity 4 rapidly. After the liquid level reaches the third liquid level sensor C or further reaches the first liquid level sensor A from the second liquid level sensor B, the first electromagnetic valve 11 and the fourth electromagnetic valve 24 are closed in sequence, and the regulation and control of the heat storage liquid amount are completed.
The utility model discloses underground energy storage system's underground energy storage cavity with two stock solution chamber structures has adopted inside and outside two stock solution chamber designs, and outer stock solution chamber (first cavity 4) has very high "volume heat transfer coefficient" (can promote 9.1-41 times), can realize high-efficient heat transfer and energy storage, and inside stock solution chamber (third cavity) has liquid measure regulatory function, can be used to the regulation and control of the outer stock solution chamber liquid measure of the storage of working medium and energy storage in-process. The utility model discloses at heat-retaining and cold storage in-process, the heat transfer of phase transition working medium and energy storage body is concentrated and is taken place in high volume heat transfer coefficient space (first cavity), has promoted unit volume working medium transmission energy's ability by a wide margin, has reduced the required working medium of system from this by a wide margin and has filled the notes volume (reducible 56.75-90.25%). In addition, according to the difference of demand side demand (energy storage "volume" or "matter") in the application, the utility model discloses the accessible carries out the developments regulation and control to outer stock solution chamber working medium liquid level at energy storage in-process, realizes the intelligent switching of different demands such as energy storage "volume" and energy storage "matter", has promoted the application and popularization value of system by a wide margin.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. An underground energy storage system with a double-liquid storage cavity structure comprises an energy storage body, an underground energy storage cavity, a heat insulation layer and a heat exchanger; the buried energy storage cavity is arranged in the energy storage body, and the insulating layer covers the energy storage body and the upper part of the buried energy storage cavity; the method is characterized in that:
the underground energy storage cavity is of a multi-cavity structure and is composed of an inner cavity and an outer cavity in the radial direction, wherein the outer cavity is a first cavity, the inner cavity is further divided into an upper cavity and a lower cavity in the axial direction, the upper cavity is a second cavity, and the lower cavity is a third cavity;
a support is arranged on the inner wall of the second cavity, a vacuum pump is mounted on the support, the vacuum pump is communicated with a telescopic air cavity in the third cavity through a first air pipe, a second electromagnetic valve is mounted on the first air pipe, a second air pipe is connected to the side of the first air pipe, and a fourth electromagnetic valve is mounted on the second air pipe below the second electromagnetic valve;
the first cavity is communicated with the third cavity through a third fluid pipe, a first electromagnetic valve is installed on the third fluid pipe, first to third liquid level sensors are respectively arranged on the outer side wall surface of the first cavity from top to bottom, one end of the first fluid pipe is connected with a first working medium interface of the heat exchanger, the other end of the first fluid pipe penetrates through the heat insulation layer to enter the first cavity, the end surface of the pipe orifice of the first fluid pipe is positioned on the upper portion of the first cavity and is higher than the first liquid level sensor, a second working medium interface of the heat exchanger is connected with one end of the second fluid pipe, the other end of the second fluid pipe penetrates through the heat insulation layer to enter the first cavity, the lower end of the pipe orifice of the second fluid pipe is immersed below the liquid level of the phase-change working medium and is lower than the second liquid level sensor, the third electromagnetic valve is arranged;
a first temperature sensor is arranged in the middle of the heat exchanger, a second temperature sensor is arranged at the upper part of the inner side wall surface of the first cavity, and a third temperature sensor is arranged at the lower part of the inner side wall surface of the first cavity;
phase change working media are filled in the first cavity and the third cavity;
the first to third temperature sensors, the first to fourth electromagnetic valves, the first to third liquid level sensors, the variable frequency working medium pump and the vacuum pump are respectively connected with the controller through signal lines.
2. An underground energy storage system having a dual reservoir configuration according to claim 1, wherein: and a working medium filling port is arranged on the first fluid pipe.
3. An underground energy storage system having a dual reservoir configuration according to claim 1, wherein: and the lower end of the pipe orifice of the second fluid pipe is connected with a filter.
4. An underground energy storage system having a dual reservoir configuration according to claim 1, wherein: the ratio of the inner diameter to the outer diameter of the first cavity is in the range of 0.75-0.95.
5. An underground energy storage system having a dual reservoir configuration according to claim 1, wherein: the volume ratio of the second cavity to the third cavity ranges from 0.11 to 0.78.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922257536.2U CN211854504U (en) | 2019-12-13 | 2019-12-13 | Underground energy storage system with double liquid storage cavity structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922257536.2U CN211854504U (en) | 2019-12-13 | 2019-12-13 | Underground energy storage system with double liquid storage cavity structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211854504U true CN211854504U (en) | 2020-11-03 |
Family
ID=73215026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922257536.2U Withdrawn - After Issue CN211854504U (en) | 2019-12-13 | 2019-12-13 | Underground energy storage system with double liquid storage cavity structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211854504U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110986400A (en) * | 2019-12-13 | 2020-04-10 | 安徽建筑大学 | Underground energy storage system with double liquid storage cavity structure and control method thereof |
| CN115875724A (en) * | 2023-03-08 | 2023-03-31 | 河北思悟新能源科技有限公司 | Heat exchange system of heat storage heater |
-
2019
- 2019-12-13 CN CN201922257536.2U patent/CN211854504U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110986400A (en) * | 2019-12-13 | 2020-04-10 | 安徽建筑大学 | Underground energy storage system with double liquid storage cavity structure and control method thereof |
| CN110986400B (en) * | 2019-12-13 | 2023-12-19 | 安徽建筑大学 | Underground energy storage system with double liquid storage cavity structure and control method thereof |
| CN115875724A (en) * | 2023-03-08 | 2023-03-31 | 河北思悟新能源科技有限公司 | Heat exchange system of heat storage heater |
| CN115875724B (en) * | 2023-03-08 | 2023-04-28 | 河北思悟新能源科技有限公司 | Heat exchange system of heat storage warmer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211854504U (en) | Underground energy storage system with double liquid storage cavity structure | |
| CN204787392U (en) | Refrigerating plant sprays | |
| CN111336627B (en) | Air source heat pump heating, refrigerating and hot water system and control method thereof | |
| CN104457026A (en) | Air source heat pump water heater hybrid air-conditioning device | |
| CN107228397B (en) | Solar heat supply heating system based on cross-season soil heat storage | |
| CN106352559B (en) | A kind of the solar heat pump and water heating system and control method of automatic adjustment working medium charging amount | |
| CN105546872A (en) | Circulation system capable of automatically refrigerating and heating by using air energy | |
| CN107860132A (en) | A kind of phase-change heat-storage solar energy instant-heating hot pump system | |
| CN110986400B (en) | Underground energy storage system with double liquid storage cavity structure and control method thereof | |
| CN110657697B (en) | Valley electricity energy storage device and using method thereof | |
| CN211503300U (en) | Multimode-driven underground energy storage system | |
| CN110986398A (en) | Multi-purpose underground energy storage system with hierarchical structure characteristic and control method thereof | |
| CN103868275A (en) | Air source heat pump system | |
| CN114599213B (en) | Dual-phase cold plate liquid cooling system and control method thereof | |
| CN106016871B (en) | A kind of method and its device inhibiting air source hot pump water heater cold operation frosting | |
| CN206160509U (en) | Automatic adjust working medium and fill solar heat pump hot water system of fluence | |
| CN211476352U (en) | Multi-purpose underground energy storage system with layered structure characteristics | |
| CN204358992U (en) | Air source hot pump water heater combined air conditioner device | |
| CN110986399B (en) | Multimode-driven underground energy storage system and system liquid filling amount regulation and control method | |
| CN101943492A (en) | Automatic temperature control solar water heating system | |
| CN201637110U (en) | Sludge waste heat recovery device | |
| CN103185406B (en) | Heat storage water tank applied to electrically auxiliary heating indirect type hot water system | |
| CN111184442A (en) | Refrigerating unit with heat storage function applied to coffee machine | |
| CN110986227A (en) | Coupling heat exchange energy-saving air conditioning system | |
| CN2302483Y (en) | Fast-cooling boiled water machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20201103 Effective date of abandoning: 20231219 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20201103 Effective date of abandoning: 20231219 |