CN110567307A - Passive energy collecting and accumulating energy supply system - Google Patents
Passive energy collecting and accumulating energy supply system Download PDFInfo
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- CN110567307A CN110567307A CN201910874086.3A CN201910874086A CN110567307A CN 110567307 A CN110567307 A CN 110567307A CN 201910874086 A CN201910874086 A CN 201910874086A CN 110567307 A CN110567307 A CN 110567307A
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- 239000012530 fluid Substances 0.000 claims abstract description 90
- 239000007788 liquid Substances 0.000 claims abstract description 76
- 230000008859 change Effects 0.000 claims abstract description 32
- 230000001050 lubricating effect Effects 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 abstract description 10
- 238000005553 drilling Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000004146 energy storage Methods 0.000 description 31
- 238000010521 absorption reaction Methods 0.000 description 19
- 239000012071 phase Substances 0.000 description 17
- 230000009471 action Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 238000010276 construction Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000012808 vapor phase Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/028—Control arrangements therefor
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- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
the invention discloses a passive energy-collecting and energy-storing energy supply system, and aims to provide a system which adopts a passive latent heat exchange mode to improve the heat transfer efficiency, reduce the operation energy consumption and improve the operation stability of the system. The underground heat exchanger comprises a heat exchanger, an underground device, a first fluid pipe and a second fluid pipe. The underground device comprises an outer barrel and an inner barrel, wherein the inner barrel is rotatably arranged inside the outer barrel, and a lubricating heat-conducting medium is arranged between the inner barrel and the outer barrel. One end of the first fluid pipe is connected with a first working medium interface of the heat exchanger, and the other end of the first fluid pipe penetrates through the upper end of the inner cylinder body and enters the inner cylinder body; one end of the second fluid pipe is connected with a second working medium interface of the heat exchanger, the other end of the second fluid pipe penetrates through the upper end of the inner cylinder body to enter the inner cylinder body, and the lower end of the pipe orifice is immersed in the phase change working medium; the second fluid pipe is provided with a liquid suction control unit; and wicks are arranged in the second fluid pipes on two sides of the imbibing control unit. The system reduces the transmission power consumption, reduces the required drilling number and improves the heat transfer efficiency.
Description
Technical Field
The invention relates to the technical field of cross-season energy storage, in particular to an underground passive energy collecting and storing energy supply system.
Background
Currently, a cross-season pipe laying energy storage system (BTES) is comprised of a large number of boreholes, packing, pipe laying heat exchangers, circulating fluids, water diversion and collection vessels, and water pumps. From the BTES operation period, firstly, the circulating fluid (water) is driven by a water pump to flow through the cold/heat source collecting device (to realize the energy collecting function) in the energy storage season and flow through the underground energy storage body again to inject the collected cold/heat energy (to realize the energy storage function), then the cold/heat energy collected in the energy storage season is extracted from the underground energy storage body by using the same heat exchange means in the energy use season, and finally the cold/heat energy is supplied to the building (to realize the energy supply function). Therefore, BTES is essentially an active sensible heat exchange system, which not only consumes a large amount of water pump delivery power consumption in the energy collection, storage and supply stages, but also has low energy collection, storage and supply efficiency of the whole system. Energy collection aspect: taking the energy collecting plate as a cold/heat source as an example, since the energy collecting efficiency of the source end is related to the installation angle, the ambient temperature, the wind speed, the sky radiation angle and other factors, and the energy collecting plate is usually installed in a fixed manner, the heat collecting/cold efficiency of the energy collecting plate in summer/winter cannot be always kept optimal due to real-time changes of the environmental factors. In contrast, although researchers propose a scheme that the relevant energy collecting plate can be adjusted along with the change of external factors ("pursuit best"), the system design is complex, the modularization degree is low, and meanwhile, large-scale popularization is difficult due to high construction cost and difficult maintenance. Energy storage and energy supply: because the energy storage and supply process of the BTES still belongs to sensible heat exchange, the operation performance of the whole system has to be maintained by increasing the number of well groups in practical engineering, which further causes the engineering cost of the BTES system to be high and seriously affects the popularization and application of the BTES system. In addition, excessive well digging and improper construction often results in irreversible ecological damage to the underground soil and water environment. In order to improve the energy storage and supply efficiency, reduce the construction cost and influence the surrounding underground ecological environment, technicians mainly adopt double U pipes or other special pipes to replace single U pipes so as to improve the heat exchange capacity per linear meter. This approach helps to reduce the number of wells and the amount of ancillary equipment, but other problems follow. For example, double U-tubes/profile tubes are prone to deformation during drilling and tube lowering processes, so that the double U-tubes/profile tubes are attached to each other (commonly referred to as "short circuit"), and a buried tube part below the short circuit point or even all of the buried tube part fails, so that the actual available capacity of the whole BTES is greatly deviated from the designed value. In addition, the backfill of the filler can also cause the uneven backfill phenomenon due to different drilling conditions and random backfill operation, so that the heat diffusion coefficients and the heat exchange efficiency of the drill holes at different positions are different, and the fine management of the BTES heat storage/extraction process is not facilitated. Therefore, the above drawbacks of active BTES have become a difficult engineering problem to be solved by the related art.
Disclosure of Invention
The invention aims to provide a passive energy collecting and storing energy supply system which adopts a passive latent heat exchange mode, improves the heat transfer efficiency, reduces the operation energy consumption and improves the operation stability of the system aiming at the technical defects in the prior art.
The technical scheme adopted for realizing the purpose of the invention is as follows:
A passive energy collecting, accumulating and supplying system comprises a heat exchanger, an underground device, a first fluid pipe and a second fluid pipe; the underground device comprises an outer cylinder and a closed inner cylinder for filling phase-change working medium, the inner cylinder is rotatably arranged in the outer cylinder, and a lubricating heat-conducting medium is hermetically arranged between the inner cylinder and the outer cylinder; 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 upper end of the inner cylinder body and enters the inner cylinder body, and the end face of the pipe orifice is positioned at the upper part in the inner cylinder body; one end of the second fluid pipe is connected with a second working medium interface of the heat exchanger, the other end of the second fluid pipe penetrates through the upper end of the inner cylinder body to enter the inner cylinder body, and the lower end of the pipe orifice is immersed in the phase change working medium; a liquid suction control unit is arranged on the second fluid pipe; liquid suction cores are respectively arranged in the second fluid pipes on the two sides of the liquid suction control unit, and a fluid flow channel is arranged in the center of each liquid suction core; the liquid suction control unit is used for cutting off or closing the connection of the liquid suction cores on the two sides of the liquid suction control unit; the inner cylinder body is driven by a rotary driving mechanism.
The system also comprises a multifunctional weather station, a controller and a driving actuator; the heat exchanger is a flat plate type solar heat collector; the driving actuator is used for driving the heat exchanger to rotate; the controller is respectively connected with the signal output end of the multifunctional weather station and the control end of the driving actuator, and the controller controls the driving actuator to act through weather information collected by the multifunctional weather station to drive the heat exchanger to rotate to a target position.
the fluid suction control unit comprises a bypass pipe and a three-way valve which are arranged on the second fluid pipe.
The inner surface of the liquid absorption core is provided with a plurality of rib-shaped convex bodies, the liquid absorption control unit comprises a pipe body, a connection liquid absorption core is arranged in the pipe body, the inner surface of the connection liquid absorption core is provided with protrusions corresponding to the rib-shaped convex bodies on the inner surface of the liquid absorption core, and the connection liquid absorption core is connected with a rotary driving mechanism; the rotary driving mechanism drives the connecting liquid absorbing core to rotate so that the protrusions of the connecting liquid absorbing core are connected with or separated from the rib-shaped convex bodies of the liquid absorbing core.
The rotatable mode of setting up of outer barrel and interior barrel does: a rotating bearing is installed between the inner barrel and the outer barrel, and a thimble is installed between the bottom of the inner barrel and the outer barrel.
The second fluid pipe consists of a straight pipe section and a bent pipe section immersed in the phase change working medium.
And a protective sleeve connected between the heat exchanger and the inner cylinder is arranged outside the first fluid pipe and the second fluid pipe between the upper end surface of the outer cylinder and the heat exchanger.
An energy storage body is arranged outside the outer cylinder body, and a heat preservation layer is arranged on the upper portion of the energy storage body.
The second fluid pipe located inside the inner cylinder is fixed through a bracket.
Compared with the prior art, the invention has the beneficial effects that:
1. The passive energy collecting and storing energy supply system adopts a passive latent heat exchange mode, greatly reduces the transmission power consumption of the BTES system, effectively improves the heat exchange amount per linear meter, and can effectively reduce the drilling number required by the BTES system and the irreversible ecological influence on the underground space around the energy storage body. Meanwhile, the system adopts a mode that the outer cylinder body, the rotatable inner cylinder body and the lubricating heat-conducting medium are combined to form a buried structure, so that the heat transfer efficiency can be greatly improved through the lubricating heat-conducting medium, the heat exchange quantity of the system is improved, the short circuit phenomenon of the traditional buried pipe type energy storage well can be effectively avoided, and the running stability of the system is greatly improved.
2. In the system, the heat transfer function of the phase change working medium in the inner cylinder can be enhanced through the rotation of the inner cylinder, and meanwhile, the heat transfer of the lubricating heat-conducting medium between the inner cylinder and the outer cylinder is enhanced, so that the heat transfer efficiency is improved.
3. The outer cylinder body in the buried part of the system can be directly sunk into the drilled hole, and the step of filling and backfilling in the traditional BTES construction is eliminated, so that the generation of uneven backfilling in the backfilling process can be effectively avoided.
4. The system can adopt modular design, construction and disassembly, can complete most civil engineering construction tasks only by reserving corresponding drill holes and sequentially sinking the underground assemblies into the reserved drill holes at the later stage, greatly reduces the construction complexity and the required construction period, and improves the modular degree of construction and installation.
5. The system can calculate and adjust the position in real time according to different seasons and different meteorological parameters, realize the maximization of energy collection efficiency, and realize the integrated high integration of different functions of cross-season energy collection, energy storage, energy supply and the like in the same system.
6. The second fluid pipe in the system is composed of the straight pipe section and the bent pipe section, so that the phenomenon of backward flow of steam in the inner cylinder in the cold accumulation or heat supply process is prevented, and the running stability of the system is improved.
7. The system of the invention has the advantages of simple structure and low cost through the optimization design consisting of the multifunctional weather station, the controller and the driving actuator.
Drawings
FIG. 1 is a schematic diagram of a passive energy collection and storage system according to the present invention;
3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3
FIG. 3 is a schematic diagram of an embodiment of a pipetting control unit;
Fig. 4 is a cross-sectional view taken along line B-B of fig. 3.
Detailed Description
The invention is described in detail below with reference to the figures and specific examples.
The structural schematic diagram of the passive energy collecting and accumulating energy supply system of the invention is shown in fig. 1, and comprises a heat exchanger 1, an underground device, a first fluid pipe 2 and a second fluid pipe 3. The underground device comprises an outer cylinder body 4 and a closed inner cylinder body 5 used for filling phase-change working medium, wherein the inner cylinder body 5 is rotatably arranged inside the outer cylinder body 4, and a lubricating heat-conducting medium 6 is hermetically arranged between the inner cylinder body 5 and the outer cylinder body 4. One end of the first fluid pipe 2 is connected with a first working medium interface of the heat exchanger 1, the other end of the first fluid pipe penetrates through the upper end of the inner cylinder 5 to enter the inner part of the inner cylinder 5, and the end face of the pipe orifice is positioned at the inner upper part of the inner cylinder 5. One end of the second fluid pipe 3 is connected with a second working medium interface of the heat exchanger 1, the other end of the second fluid pipe penetrates through the upper end of the inner cylinder 5 to enter the inner cylinder 5, and the lower end of the pipe orifice is immersed in the phase change working medium 7. And a liquid suction control unit is arranged on the second fluid pipe 3, and liquid suction cores 8 are respectively arranged in the second fluid pipe 3 at two sides of the liquid suction control unit. Wick 8 can adopt the structure among the prior art, wick 8 center is provided with the fluid flow way, and the inner wall is provided with the slot. The liquid suction control unit is used for cutting off or closing the connection of liquid suction cores on two sides of the liquid suction control unit. In order to improve the heat transfer efficiency, the inner cylinder 5 is driven by a rotary drive mechanism. The rotary drive mechanism may drive the inner cylinder 5 directly or indirectly via a component connected to the inner cylinder 5. The rotary drive mechanism adopts the prior art scheme. The rotary driving mechanism drives the inner cylinder 5 to rotate, the phase change working medium in the inner cylinder 5 and the lubricating heat transfer medium between the inner cylinder and the outer cylinder are disturbed, and the heat transfer efficiency is improved.
In order to realize the 'follow-up' effect of the heat exchanger 1, the passive energy collecting and storing energy supply system further comprises a multifunctional meteorological station 9, a controller 10 and a driving actuator 11. The heat exchanger 1 is a flat plate type solar heat collector, collects heat in summer and collects cold in winter by surface covering. The driving actuator 11 is used for driving the heat exchanger 1 to rotate. The controller 10 is respectively connected with a signal output end of the multifunctional weather station 9 and a control end of the driving actuator 11, and the controller 10 controls the driving actuator 11 to act through weather information collected by the multifunctional weather station 9 to drive the heat exchanger 1 to rotate to a target position.
The liquid suction control unit in the present invention may have various structures. In this embodiment, the liquid suction control unit can adopt the following two setting modes:
The structure schematic diagram of the first liquid suction control unit is shown in fig. 2, and the specific structure is as follows: the liquid suction control unit comprises a bypass pipe 12 and a three-way valve 13 which are arranged on the second fluid pipe 3, no liquid suction core is arranged in the bypass pipe 12, and the bypass pipe 12 is used for communicating the upper section and the lower section of the second fluid pipe 3. The concrete connection mode is as follows: one end of the bypass pipe 12 is connected with a port B of the three-way valve, the other end of the bypass pipe 12 is connected with a port A of the three-way valve 13 in parallel and then connected with the upper section of the second fluid pipe, and a port C of the three-way valve 13 is connected with the lower section of the second fluid pipe 3. Wicks are installed in the second fluid pipes on the upper section of the port A and the lower section of the port C of the three-way valve 13. When the BC channel is opened and closed by the AC channel of the three-way valve 13, the upper section of the second fluid pipe 3 is communicated with the liquid absorption core 8 at the lower section, and the capillary action can be generated on the phase change working medium in the inner cylinder 5. When the BC channel of the three-way valve is communicated with the AC channel and is closed, the upper section and the lower section of the second fluid pipe 3 are connected through the bypass pipe 12, the upper section of the second fluid pipe 3 is disconnected with the liquid absorbing core 8 in the lower section, and the capillary force action cannot be generated.
The structure schematic diagram of the second liquid suction control unit is shown in fig. 3, and the specific structure is as follows: the inner surface of the liquid absorption core 8 is provided with a plurality of rib-shaped convex bodies, the liquid absorption control unit comprises a pipe body A-1, a connection liquid absorption core A-2 is arranged in the pipe body A-1, the inner surface of the connection liquid absorption core A-2 is provided with a protrusion A-3 corresponding to the rib-shaped convex bodies on the inner surface of the liquid absorption core, and the cross-sectional view of the connection liquid absorption core A-2 is shown in figure 4. The connection liquid absorption core A-2 is connected with a rotary driving mechanism, and the rotary driving mechanism drives the connection liquid absorption core A-2 to rotate so that the protrusion connected with the liquid absorption core A-2 is connected with or separated from the rib-shaped convex body of the liquid absorption core. The rotary driving mechanism can adopt a plurality of structures such as a push rod, a wrench, a rotary hydraulic cylinder and the like. In this embodiment, in order to realize automatic rotation, the rotation driving mechanism includes a hollow valve seat a-4 installed in the middle of the pipe body a-1, a driven gear a-5 and a driving gear a-6 which are engaged with each other are arranged inside the hollow valve seat a-4, the driven gear a-5 is connected with the connection wick a-2 in a key manner, and the driving gear a-6 is connected with an output shaft of a driving motor a-7. The driving motor A-7 is started to drive the driving gear A-6 to rotate, and the driven gear A-5 drives the connection liquid suction core A-2 to rotate for a certain angle (for example, 30 degrees), so that the rib-shaped protrusions A-3 connected with the liquid suction core A-2 are aligned with the grooves of the liquid suction core 8 installed in the second fluid pipe 3, the connection between the rib-shaped protrusions connected with the liquid suction core A-2 and the rib-shaped protrusions of the liquid suction core 8 is blocked, and the effect of capillary force cannot be continuously generated. The driving motor A-7 is started to drive the driving gear A-6 to rotate, and the driven gear A-5 drives the connecting liquid suction core A-2 to rotate for a certain angle (for example, 30 degrees) again, so that the rib-shaped convex bodies A-3 of the connecting liquid suction core A-2 are aligned with the rib-shaped convex bodies of the liquid suction core 8 in the second fluid pipe 3, the connection of the connecting liquid suction core A-2 and the liquid suction core 8 is switched on, and continuous capillary force action is generated.
The outer cylinder 4 and the inner cylinder 5 can be arranged in a plurality of rotatable modes. In this embodiment, the rotatable setting mode of outer barrel 4 and interior barrel 5 is: a rotating bearing 14 is arranged between the inner cylinder 5 and the outer cylinder 4, and a thimble 15 is arranged between the bottom of the inner cylinder 5 and the outer cylinder 4. When the inner cylinder is acted by force, the thimble and the surrounding bearing support the outer cylinder 4 to rotate.
In this embodiment, the second fluid pipe 3 is composed of a straight pipe section 3-1 and a curved pipe section 3-2 immersed in the phase change working medium, and the liquid suction core in the second fluid pipe extends to the curved pipe section 3-2.
In this embodiment, the first fluid pipe 2 and the second fluid pipe 3 between the upper end surface of the outer cylinder 4 and the heat exchanger 1 are externally provided with a protective sleeve 16 connected between the heat exchanger and the inner cylinder, which plays a role of protecting a pipeline, a control mechanism and other electric circuits in the sleeve; meanwhile, the heat exchanger is supported and can transmit driving action.
when in use, the energy storage body 17 is drilled, the outer cylinder 4 is placed in the drilled hole of the energy storage body 17, and the upper part of the energy storage body 17 is provided with the heat preservation layer 18.
In order to fill the phase-change working medium and vacuumize the interior of the inner cylinder 5, a working medium filling opening 19 is formed in the first fluid pipe 2. Before use, the vacuum is firstly pumped through the working medium flushing port 19, and then the phase change working medium is injected.
The second fluid tube 3, which is located inside the inner cylinder 5, is fixed by means of a bracket 20.
The passive energy collecting, storing and supplying system can be used in summer heat collecting and storing mode and winter heat supplying mode, or in winter cold collecting and storing mode and summer cold supplying mode.
Summer heat collection and storage and winter heat supply modes: when heat collection and storage are carried out in summer, firstly, the AC channel of the three-way valve 13 is opened, and the BC channel is closed, so that the liquid absorption cores 8 in the second fluid pipe 3 are communicated with each other; at the moment, liquid phase-change working medium enters the heat exchanger 1 through the bent pipe section 3-2 and the straight pipe section 3-1 under the action of capillary force, absorbs heat energy from solar radiation and the environment to be subjected to phase-change evaporation to form vapor phase-change working medium, then the vapor phase-change working medium enters the inner cylinder 5 of the underground energy storage well through the first fluid pipe 2 under the driving of phase-change force, is condensed into liquid phase-change working medium under the cooling action of the wall surface of the inner cylinder 5, and finally drops to the bottom of the inner cylinder 5 to finish the circulation process of the phase-change working medium 7; meanwhile, the heat released to the wall surface of the inner cylinder 5 is gradually diffused to the peripheral energy storage body 17 under the transmission of the lubricating heat-conducting medium 6, and finally the heat collection and heat storage processes in summer are completed. When heating in winter, the circulating fluid interface of the heat exchanger 1 is connected with a heating system. First, the BC channel of the three-way valve 13 is opened and the AC channel is closed, and the wicks 8 in the second fluid tube 3 are disconnected from each other and no continuous capillary force is generated. At the moment, under the continuous heating action of the heat accumulated in the energy storage body 17 in summer, the liquid phase change working medium at the bottom of the cylinder 5 in the underground energy storage well absorbs heat, changes phases and evaporates into a vapor phase change working medium which is accumulated at the upper part of the inner cylinder 5 and enters the heat exchanger 1 through the first fluid pipe 2 under the driving action of phase change force; because the temperature at the fluid working medium inlet is lower, the vapor phase change working medium is cooled and releases heat to the low-temperature fluid working medium to be condensed into a liquid phase change working medium; under the action of gravity, the liquid phase-change working medium finally flows back to the bottom of the inner cylinder 5 of the underground energy storage well through the upper section of the second fluid pipe 3, the bypass pipe 12, the lower section of the second fluid pipe 3 and the bent pipe section 3-2 to complete the circulation process of the phase-change working medium 7. In the heat exchanger 1, the fluid working medium flowing into the heat exchanger 1 from the fluid working medium inlet exchanges heat with the phase-change working medium, the fluid working medium with the increased temperature flows out from the fluid working medium outlet of the heat exchanger and is conveyed to the energy utilization side, and finally the heat supply process in winter is completed.
Winter cold collection and storage and summer cold supply modes: when cold is collected and stored in winter, the circulating fluid interface of the heat exchanger 1 is connected with a cold supply system. First, the BC channel of the three-way valve 13 is opened and the AC channel is closed, and the wicks 8 in the second fluid tube 3 are disconnected from each other and cannot generate continuous capillary force. At the moment, because the ground temperature of the energy storage body 17 is obviously higher than the outdoor environment temperature, under the continuous heating action of the energy storage body 17, the liquid phase change working medium at the bottom of the inner cylinder 5 in the underground energy storage well continuously absorbs heat and changes phase to evaporate into a vapor phase change working medium, enters the heat exchanger 1 through the first fluid pipe 2 under the driving action of phase change force, absorbs cold energy from the environment so as to change phase and condense into a liquid phase change working medium, and enters the bottom of the inner cylinder 5 in the underground energy storage well through the upper section of the underground second fluid pipe 3, the bypass pipe 12, the lower section of the second fluid pipe and the bent pipe section 3-2 under the action of gravity, so that the circulation process of the phase change working medium 7 is; meanwhile, the phase change working medium 7 continuously dissipates the heat in the energy storage body 17 to the environment, so that the environment cold energy is gradually diffused to the peripheral energy storage body 17, and finally the cold collection and storage processes in winter are completed. In summer, when cooling is performed, firstly, the AC channel of the three-way valve 13 is opened, and the BC channel is closed, so that the liquid absorption cores 8 in the second fluid pipe 3 are communicated with each other; the liquid phase-change working medium enters the heat exchanger 1 through the bent pipe section 3-2 and the second fluid pipe 3 under the action of capillary force; at the moment, because the temperature at the fluid working medium inlet is higher, the liquid phase-change working medium absorbs heat from the high-temperature fluid and is subjected to phase-change evaporation to become a vapor phase-change working medium; under the action of the phase change force, the vapor phase change working medium finally enters the inner cylinder 5 in the underground energy storage well through the first fluid pipe 2, is condensed into the liquid phase change working medium under the cooling action of the wall surface of the inner cylinder 5, and finally drops to the bottom of the inner cylinder 5 in the underground energy storage well to finish the circulation process of the phase change working medium 7. Meanwhile, the cooled fluid working medium flows out from the fluid working medium outlet and is conveyed to the energy utilization side, and the summer cooling process is completed.
Under the two operation modes, in order to realize the optimum pursuit effect of the heat exchanger 1, the optimum pursuit design structure is composed of the multifunctional weather station 9, the controller 10 and the driving actuator 11, when the factors such as the solar radiation angle, the environmental temperature, the wind speed and the like change, the multifunctional weather station sends the related information to the controller, and the controller drives the heat exchanger 1 to rotate to the target position through the driving actuator according to the change situation, so that the heat collection efficiency in summer and the cold collection efficiency in winter change along with the real-time change of the environmental factors and always keep the optimum.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A passive energy collecting and accumulating energy supply system is characterized by comprising a heat exchanger, an underground device, a first fluid pipe and a second fluid pipe; the underground device comprises an outer cylinder and a closed inner cylinder for filling phase-change working medium, the inner cylinder is rotatably arranged in the outer cylinder, and a lubricating heat-conducting medium is hermetically arranged between the inner cylinder and the outer cylinder; 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 upper end of the inner cylinder body and enters the inner cylinder body, and the end face of the pipe orifice is positioned at the upper part in the inner cylinder body; one end of the second fluid pipe is connected with a second working medium interface of the heat exchanger, the other end of the second fluid pipe penetrates through the upper end of the inner cylinder body to enter the inner cylinder body, and the lower end of the pipe orifice is immersed in the phase change working medium; a liquid suction control unit is arranged on the second fluid pipe; liquid suction cores are respectively arranged in the second fluid pipes on the two sides of the liquid suction control unit, and a fluid flow channel is arranged in the center of each liquid suction core; the liquid suction control unit is used for cutting off or closing the connection of the liquid suction cores on the two sides of the liquid suction control unit; the inner cylinder body is driven by a rotary driving mechanism.
2. the passive energy collecting, accumulating and supplying system of claim 1, further comprising a multifunctional weather station, a controller and a driving actuator; the heat exchanger is a flat plate type solar heat collector; the driving actuator is used for driving the heat exchanger to rotate; the controller is respectively connected with the signal output end of the multifunctional weather station and the control end of the driving actuator, and the controller controls the driving actuator to act through weather information collected by the multifunctional weather station to drive the heat exchanger to rotate to a target position.
3. A passive energy collecting and accumulating energy supply system according to claim 1 or 2, characterized in that the liquid suction control unit comprises a bypass pipe and a three-way valve arranged on the second fluid pipe.
4. the passive energy collecting, storing and supplying system according to claim 1 or 2, wherein the inner surface of the liquid absorbing core is provided with a plurality of rib-shaped protrusions, the liquid absorbing control unit comprises a pipe body, a connecting liquid absorbing core is arranged in the pipe body, the inner surface of the connecting liquid absorbing core is provided with protrusions corresponding to the rib-shaped protrusions on the inner surface of the liquid absorbing core, and the connecting liquid absorbing core is connected with a rotation driving mechanism; the rotary driving mechanism drives the connecting liquid absorbing core to rotate so that the protrusions of the connecting liquid absorbing core are connected with or separated from the rib-shaped convex bodies of the liquid absorbing core.
5. The passive energy collecting, storing and supplying system according to claim 1 or 2, wherein the rotatable arrangement of the outer cylinder and the inner cylinder is as follows: a rotating bearing is installed between the inner barrel and the outer barrel, and a thimble is installed between the bottom of the inner barrel and the outer barrel.
6. The passive energy collecting, storing and supplying system according to claim 1 or 2, wherein the second fluid pipe is composed of a straight pipe section and a bent pipe section immersed in the phase change working medium.
7. A passive energy collecting and accumulating and supplying system according to claim 1 or 2, wherein the first fluid pipe and the second fluid pipe between the upper end face of the outer cylinder and the heat exchanger are externally provided with a protective sleeve connected between the heat exchanger and the inner cylinder.
8. The passive energy collecting, storing and supplying system according to claim 1 or 2, wherein an energy storing body is arranged outside the outer cylinder body, and an insulating layer is arranged on the upper part of the energy storing body.
9. A passive energy collecting and accumulating energy supply system according to claim 1 or 2, characterized in that the second fluid pipe inside the inner cylinder is fixed by a bracket.
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| CN110567307B (en) | 2024-03-22 |
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