CN116481200A - Device for coupling refrigeration by utilizing compressed air energy storage - Google Patents
Device for coupling refrigeration by utilizing compressed air energy storage Download PDFInfo
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- CN116481200A CN116481200A CN202310545412.2A CN202310545412A CN116481200A CN 116481200 A CN116481200 A CN 116481200A CN 202310545412 A CN202310545412 A CN 202310545412A CN 116481200 A CN116481200 A CN 116481200A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 38
- 238000004146 energy storage Methods 0.000 title claims abstract description 29
- 230000008878 coupling Effects 0.000 title claims abstract description 19
- 238000010168 coupling process Methods 0.000 title claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 239000003570 air Substances 0.000 claims description 178
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 62
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 239000012080 ambient air Substances 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 25
- 230000005611 electricity Effects 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000003749 cleanliness Effects 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/004—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
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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
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a device for coupling refrigeration by utilizing compressed air energy storage, and belongs to the technical field of refrigeration. The invention uses high-pressure air to generate low-temperature cold air through the low-temperature cold air generating mechanism, then utilizes the ejector to blend the low-temperature cold air with normal-temperature air, adjusts the temperature of the cold air and increases the cold air flow at the same time, so that the refrigerating link is stable and reliable, i.e. the refrigerating link is more independent, and the refrigerating temperature is controllable; the storage tank is designed to store compressed gas, so that the electric power can be used for driving the compressor to work in the electricity price valley period, energy can be stored in the form of high-pressure air, and the high-pressure air is used for refrigerating in the electricity price peak period, so that consumption of peak electricity resources is reduced; the refrigerating working medium is used as air, so that the ecological environment is not polluted, and the purposes of refrigerating cleanliness, environmental protection and safety are realized; the air for cooling the indoor is from the outdoor compressed air, which is equivalent to the fresh air of a common air conditioner, and improves the indoor air quality.
Description
Technical Field
The invention belongs to the technical field of refrigeration, and particularly relates to a device for coupling refrigeration by utilizing compressed air energy storage.
Background
The current civil refrigeration uses refrigerant such as common R32 and R410A refrigerant, which is not only expensive, but also has combustibility and higher global warming potential. Meanwhile, the existing air conditioner is complex in structure, and consumes a large amount of peak power resources in summer, so that peak load of a power grid is increased.
In the prior art, related applications of refrigerating devices using air as working medium are available on air separation and civil aircraft, and most of the devices are designed based on the air reverse brayton cycle, but the efficiency of the reverse brayton cycle is low, and the heat exchange efficiency of a heat exchanger and the like need to be considered, so that the devices cannot be widely applied in the civil refrigerating industry. The prior air refrigerator, such as the patent number CN201610674511.0, discloses an air refrigerating device, which adopts a compressor and an expander which are coaxially connected, wherein air is compressed and heated by the compressor in sequence during refrigeration, heat is exchanged and cooled by a heat exchanger, and the cooled expander is introduced into a room to achieve the aim of refrigeration. But it has the following problems: when the device is used for cooling, the compressors are required to run simultaneously, and the electricity price is often higher in a period of time with larger civil cooling load, so that the device is uneconomical to run; the device has higher requirements on the performance of the heat exchanger component, if the heat exchange performance of the heat exchanger is poor, the temperature of air entering the expansion unit is higher, and the temperature of output cold air is higher, so that the cooling capacity is reduced; the temperature of the cold air in the cooling process can not be regulated basically, and the temperature-changing cold requirement of a user can not be met.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a device for coupling refrigeration by utilizing compressed air energy storage, so as to solve the problems of single cooling temperature, complex structural design of components and poor economical efficiency of the operation process of the existing refrigeration device.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
the invention discloses a device for utilizing compressed air energy storage coupling refrigeration, which comprises an air compressor, wherein the outlet end of the air compressor is sequentially provided with a heat exchanger, a filter, a storage tank, a dryer, a low-temperature cold air generating mechanism and an ejector; the inlet end and the outlet end of the storage tank are respectively provided with a pressure regulating valve;
the outdoor ambient air is cooled by a heat exchanger after being compressed by an air compressor, filtered by a filter to remove impurities, and stored in a storage tank; when refrigerating, the high-pressure air enters the low-temperature cold air generating mechanism from the dryer, generates active flow and enters the ejector, the ejector introduces induced flow from ambient air, and the active flow and the induced flow are fully mixed to generate cold air with proper temperature and then are conveyed into a user room.
Preferably, the low-temperature cold air generating mechanism is a vortex tube, an outlet of the dryer is connected with an inlet of the vortex tube, a cold end outlet of the vortex tube is connected with an active inflow port of the ejector, a hot end outlet of the vortex tube is communicated with an outdoor atmospheric environment, an injection inflow port of the ejector is communicated with an indoor or outdoor environment, and an outlet of the ejector is communicated with the indoor environment.
Further preferably, the cold air temperature of the ejector outlet is regulated by changing the opening of a valve at the hot end outlet of the vortex tube.
Preferably, the low-temperature cold air generating mechanism is an expander, and a second heat exchanger is additionally arranged between the dryer and the expander; the outlet of the dryer is connected with the inlet end of the expander through the second heat exchanger, the outlet end of the expander is connected with the active inflow port of the ejector, the ejector inflow port of the ejector is communicated with the indoor or outdoor environment, and the outlet of the ejector is communicated with the indoor environment.
It is further preferred that a recuperative water circuit is arranged between the heat exchanger and the second heat exchanger.
Still further preferably, a first water pump and a normal temperature water storage tank are sequentially arranged between the water outlet end of the second heat exchanger and the water inlet end of the heat exchanger to form a first circulation branch of the hot water return.
Further preferably, a second water pump and a hot water storage tank are sequentially arranged between the water outlet end of the heat exchanger and the water inlet end of the second heat exchanger to form a hot water return second circulation branch.
Preferably, a plurality of air compressors are arranged, and a heat exchanger and a filter are arranged behind each air compressor.
Further preferably, several stages of air compressors are arranged in parallel.
Preferably, the tank is made of steel that is corrosion resistant, temperature resistant and high pressure resistant.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a device for utilizing compressed air energy storage coupling refrigeration, which has the main advantages that: firstly, high-pressure air is used for generating low-temperature cold air through a low-temperature cold air generating mechanism, then the ejector is used for mixing the low-temperature cold air with normal-temperature air, and the cold air temperature is adjusted while the cold air flow is increased, so that the refrigerating link is stable and reliable, namely, the refrigerating link is independent, and the refrigerating temperature is controllable; secondly, the storage tank is designed to store compressed gas, so that the electric power can be used for driving the compressor to work in the electricity price low-valley period, energy is stored in a high-pressure air mode, and the high-pressure air is used for refrigerating in the electricity price peak period, so that consumption of peak electricity resources is reduced; thirdly, the device is provided with the filter behind the heat exchanger, so that the air can be prevented from entering a room after passing through the multistage compressor and carrying greasy dirt and impurity dust particles; fourth, use the refrigerant as the air, have pollution to ecological environment, realize the clean, environment-friendly, safe refrigeration; fifth, the air for cooling the indoor is from the outdoor compressed air, which is equivalent to the fresh air of the general air conditioner, and improves the indoor air quality.
Further, the low-temperature cold air generating mechanism selects the design of the vortex tube, and uses the cold end air of the vortex tube by utilizing the energy separation characteristic of the vortex tube to realize the purpose of air cooling; and then the mixing function of the ejector is utilized to introduce the low-temperature cold air with the pressure at the cold end outlet of the vortex tube into the ejector to eject the ambient air, so that the purpose of regulating and controlling the temperature is achieved. According to the scheme, high-pressure air produced by the compressor is converted into cold air with controllable temperature, so that efficient refrigeration of the compressed air is realized.
Furthermore, by changing the opening of the hot end valve of the vortex tube, the temperature of cold air supplied by the outlet of the ejector can be dynamically regulated and controlled, and the cold air requirements of different temperatures of users can be met. Further, the other low-temperature cold air generating mechanism is provided with the expander, and the working characteristics that the temperature of the air is reduced after the air passes through the expander and the axial work can be generated are utilized, so that the effect of air cooling is achieved, and meanwhile, part of compression power consumption is recovered; and then the mixing function of the ejector is utilized, and the cold air with pressure after the expander is ejected into normal-temperature normal-pressure air through the ejector, so that the purposes of regulating and controlling the temperature and increasing the cold air flow are achieved. The scheme converts the pressure energy of high-pressure air into cold energy, generates cold air with proper temperature, realizes the refrigeration function, can generate shaft work simultaneously, and has the energy storage function.
Further, the air compressor is arranged into a plurality of stages, and a heat exchanger is arranged behind each stage of the air compressor so as to reduce the power consumption of the compressor unit, and simultaneously reduce the temperature of high-pressure air entering the storage tank, thereby increasing the energy storage density; furthermore, when the low-temperature cold air generating mechanism selects the expander, the ambient air is used for exchanging heat with the air at each stage of outlet of the expander, so that the power consumption of the compressor unit is reduced, and meanwhile, the temperature of high-pressure air entering the storage tank is reduced, and the energy storage density is further increased.
Drawings
Fig. 1 is a schematic diagram of an apparatus for storing energy and coupling refrigeration using compressed air according to embodiment 1 of the present invention.
FIG. 2 is a schematic diagram of a device for refrigerating a regenerative-free water cycle using compressed air energy storage coupling according to embodiment 2 of the present invention;
FIG. 3 is a schematic diagram of a device for refrigerating a regenerative water cycle using compressed air energy storage coupling according to embodiment 2 of the present invention;
FIG. 4 is a multi-compressor layout of embodiments 1, 2 of the present invention;
FIG. 5 is a graph showing the temperature of the cold air output with the cold flow rate according to example 1.
Wherein: 1-an air compressor; 2-a heat exchanger; 3-a filter; 4-a pressure regulating valve; 5-a storage tank; 6-a dryer; 7-vortex tube; 8-an ejector; 9-a second heat exchanger; 10-an expander; 11-a normal temperature water storage tank; 12-a hot water storage tank; 13-a first water pump; 14-a second water pump; the solid line in the figure is air; the dashed line is water.
In the figure, the solid line is air, and the broken line is water flow.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
example 1
As shown in fig. 1, this embodiment is constituted by an air compressor 1, a heat exchanger 2, a filter 3, a pressure regulating valve 4, a storage tank 5, a dryer 6, a swirl tube 7, and an ejector 8. The air compressor 1 extracts ambient air and compresses, and high-pressure air gets into filter 3 after heat exchanger 2 cooling and gets rid of greasy dirt and impurity in the air, and rethread refrigerant pipeline stores in storage tank 5, and storage tank 5 installs outdoors, and the surface does not set up the heat preservation measure, and high temperature high-pressure air passes through storage tank 5 wall and the abundant heat transfer of environment for the interior gas temperature of storage tank 5 gradually approaches ambient temperature. When refrigeration is needed, the storage tank valve is opened, high-pressure air is introduced into the dryer 6 to be dried, the water content in the air is reduced, the air is introduced into the vortex tube through the opening 7a, the phenomenon that the normal work of the vortex tube is influenced by condensation of water vapor in the air due to the fact that the temperature of the outlet 7b of the cold end of the vortex tube 7 is too low is avoided, the air flowing out of the outlet 7b of the cold end of the vortex tube 7 is used as the active flow of the ejector 8, and the induced flow of the ejector 8 is air in an indoor or outdoor environment. The active flow and the jet flow are fully mixed under the mixing action of the ejector 8, cold air with proper temperature is produced and is conveyed into a user room through a cold air conveying pipeline, and hot end airflow of the vortex tube 7 is directly discharged into the atmosphere through a hot end outlet 7c through the pipeline.
The device for utilizing compressed air energy storage coupling refrigeration of the embodiment is used in the following steps: the inlet 1a of the air compressor 1 is communicated with the outdoor atmosphere, the heat exchanger 2 is arranged behind each stage of the air compressor 1, the compressor outlet 1b is connected with the inlet 5a of the storage tank 5 through the heat exchanger 2, the filter 3 and the pressure regulating valve 4, the outlet 5b of the storage tank 5 is connected with the inlet 6a of the dryer 6 through the pressure regulating valve, the outlet 6b of the dryer 6 is connected with the inlet 7a of the vortex tube 7, the cold end outlet 7b of the vortex tube 7 is connected with the active inflow port 8a of the ejector 8, the hot end outlet 7c of the vortex tube 7 is communicated with the outdoor atmosphere, the injection inflow port 8b of the ejector 8 is communicated with the indoor or outdoor environment, the outlet 8c of the ejector 8 is communicated with the indoor environment, and the indoor gas finally returns to the outdoor atmosphere through the return air system.
The application of the present embodiment is described below as an example:
setting the object to be cooled as a resident user, assuming that the house area is 100m 2 The floor height is 2.8m, and the floor is two-room one-hall house type. Assume a single bedroomThe required refrigeration power is 2500W, the required refrigeration power of the living room is 3500W, and the cooling power of a single household is 2500W-8500W. In most cases, users only need single cooling room, so that the air supply port is arranged in each room and communicated with the device, and the cooling rooms can be switched at any time. Taking 2500W as an example of cooling power, the cooling air supply amount of the device is 500m 3 And/h. If the air compressor in the embodiment adopts a four-stage compressor with the power of 6.63kW, the capacity of the storage tank is 5m 3 The maximum pressure is 10.0MPa, the minimum pressure is 2.0MPa, and the high-pressure air pressure is 2.0MPa after passing through the pressure regulating valve. The output cold air flow rate of the ejector is kept constant, the cold flow rate of the vortex tube is regulated from 0.20 to 0.70, and the temperature of the output cold air can be dynamically regulated within the temperature range of 16.5 ℃ to 24.0 ℃, as shown in fig. 5. The output cold power of the device varies with the cold flow rate of the vortex tube as shown. The charging time of the device is 10.0h, and the gas stored in the storage tank can be used for the device to operate for 2.6h. The air for cooling the indoor by the device comes from outdoor compressed air, which is equivalent to fresh air of a common air conditioner, and can improve the indoor air quality.
In summary, the embodiment uses the energy separation characteristic of the vortex tube to take the cold end air, thereby realizing the purpose of air cooling; the mixing function of the ejector is utilized, the low-temperature cold air with the pressure at the cold end outlet of the vortex tube is introduced into the ejector to eject the ambient air, the purpose of regulating and controlling the temperature is achieved, and the scheme is explained that the high-pressure air produced by the compressor unit can be converted into the cold air with the controllable temperature, so that the efficient refrigeration of the compressed air is realized.
Example 2
As shown in fig. 2, this embodiment differs from embodiment 1 in that two heat exchangers are provided, a vortex tube is not provided any more, and an expander is added, and the apparatus is composed of an air compressor 1, a heat exchanger 2, a filter 3, a storage tank 5, a pressure regulating valve 4, a dryer 6, a second heat exchanger 9, an expander 10, and an ejector 8. The air compressor 1 extracts outdoor air for compression, and high-pressure air gets into filter 3 after heat exchanger 2 cooling and gets rid of greasy dirt and impurity in the air, and rethread refrigerant pipeline transportation stores in storage tank 5, and storage tank 5 is installed outdoors, and the surface does not set up the heat preservation measure, and high-temperature high-pressure air passes through storage tank 5 wall and the abundant heat transfer of environment for the gas temperature gradually approaches ambient temperature. When refrigeration is needed, the high-pressure air is output at a fixed pressure after being regulated by the pressure regulating valve 4, and the high-pressure air is introduced into the dryer 6 to remove water vapor in the air, so that water in the air is prevented from generating liquid drops in the expander 10 to damage blades and icing to block the vortex tube. Before the high-pressure air enters the expander 10, the high-pressure air exchanges heat with the hot water absorbing the compression heat in the hot water storage tank 12 in the second heat exchanger 9 to increase the air inlet temperature of the expander 10, and the hot water after heat exchange is sent into the normal-temperature water storage tank 11 through the water pump to be stored. After that, high-pressure air is introduced into the expander 10 for expansion, the air pushes the blades to do work, the air pressure is reduced, and the temperature is reduced. Then, the air with pressure and drying low temperature at the outlet 10b of the expander 10 is introduced into the active inflow port 8a of the ejector 8, the ambient air is taken as a guide flow, enters the ejector 8 from the port 8b, and cold air with proper temperature is produced through the mixing effect of the ejector 8 and is conveyed to each room through an air supply pipeline in a ceiling.
The device for utilizing compressed air energy storage coupling refrigeration of the embodiment is used in the following steps: the inlet 1a of the air compressor 1 is communicated with the outdoor environment, the outlet 1b of the air compressor 1 is communicated with the inlet 5a of the storage tank 5 through the heat exchanger 2, the filter 3 and the pressure regulating valve, the outlet 5b of the storage tank 5 is connected with the inlet 6a of the dryer 6 through the pressure regulating valve 4, the outlet 6b of the dryer 6 is connected with the inlet 10a of the expander 10 through the second heat exchanger 9, the outlet 10b of the expander 10 is connected with the active inflow port 8a of the ejector 8, the ejector inflow port 8b of the ejector 8 is communicated with the indoor or outdoor environment, the outlet 8c of the ejector 8 is communicated with the indoor environment, and indoor gas finally returns to the outdoor atmosphere through the air return system.
Further, referring to fig. 3, a regenerative water circulation pipeline is introduced on the basis of the original structure of the present embodiment, that is, a circulation pipeline is arranged between two stages of heat exchangers, wherein the second heat exchanger 9, the first water pump 13, the normal temperature water storage tank 11 and the heat exchanger 2 form a first circulation branch, and the heat exchanger 2, the second water pump 14, the hot water storage tank 12 and the second heat exchanger 9 form a second circulation branch. During the energy release of the device, hot water stored in the hot water storage tank 12 is used for exchanging heat with inlet air of each stage of the expansion machine 10 through the second heat exchanger 9, and the heat exchanged hot water is sent into the hot water storage tank 11 for storage through the first water pump 13. The hot water after heat exchange in the normal temperature water storage tank 11 is gradually cooled down to the ambient temperature to become the normal temperature water. During the charging of the device, the normal temperature water stored in the normal temperature water storage tank 11 is utilized to exchange heat with the outlet air of each stage of the compressor 1 through the heat exchanger 2, and the obtained hot water is stored in the hot water storage tank 12 for use. The surface of the hot water storage tank 12 is provided with heat preservation measures, and the surface of the normal-temperature water storage tank 12 is not provided with heat preservation measures.
The application of the present embodiment is described below as an example:
setting the cooling object as 100 resident users, and assuming that the single resident area is 100m 2 The floor height is 2.8m, and the floor is two-room one-hall house type. Assuming that the required refrigeration power in a single bedroom is 2500W and the required refrigeration power in a living room is 3500W, the cooling power of the single bedroom is 2500W-8500W. In most cases, users only need single cooling room, so that the air supply port is arranged in each room and communicated with the device, and the cooling rooms can be switched at any time. Taking 2500W as an example of cooling power, the cooling air supply amount of the device is 50000m 3 /h。
In this example, a four-stage compressor with a power of 1.66MW was used, and the storage tank volume was 2700m 3 The maximum pressure is 10MPa and the minimum pressure is 7MPa. The air pressure is 7MPa after the air passes through the pressure regulating valve, the expansion ratio of the three-stage expansion machine is 23.34, the output power is 0.83MW, if no water circulation back heating (as shown in the structure of fig. 2) is arranged, the electric heating is utilized to produce hot water, the hot water is utilized to preheat the inlet air of the expansion machine through the heat exchanger 9, even if the electric heating efficiency and the heat transfer efficiency of the heat exchanger are both 100%, namely, the electric energy is completely converted into heat in the air, and the energy storage efficiency is 38.67%. If water is added for recycling (as shown in the structure of fig. 3), electric energy is not consumed, and the energy storage efficiency of the system is 40.94%. The temperature of the cold air output was 18 ℃. The charging time of the device is 8.72h, and the gas stored in the storage tank can be used for the device to run for 7.22h.
In summary, the working characteristics that the temperature of the air is reduced and the shaft work can be generated after the air passes through the expander are utilized, so that the effect of air cooling is achieved, and meanwhile, a part of compression power consumption is recovered; and then the mixing function of the ejector is utilized, and the cold air with pressure after the expander is ejected into normal-temperature normal-pressure air through the ejector, so that the purposes of regulating and controlling the temperature and increasing the cold air flow are achieved. The scheme converts the pressure energy of high-pressure air into cold energy, generates cold air with proper temperature, realizes the refrigeration function, can generate shaft work simultaneously, and has the energy storage function.
Referring to fig. 4, on the basis of the above two embodiments of the present invention, when the present invention is applied to urban environments with relatively large areas, such as concert halls, reporting halls, stadiums, etc., one air compressor cannot meet the refrigerating effect, so that a plurality of air compressors 1 are provided, one heat exchanger 2 and one filter 3 are provided behind each air compressor 1, and a plurality of groups of compressors can be connected in parallel with a plurality of stages of air compressors to achieve the refrigerating effect.
In summary, in the device for coupling refrigeration by using compressed air energy storage disclosed by the invention, in the scheme of embodiment 1, the refrigeration temperature is determined by the opening of the hot end valve of the vortex tube, and the required temperature can be directly, quickly and stably obtained by regulating the opening of the valve and the temperature sensor of the cold end measuring point through the microprocessor, so that the refrigeration temperature is convenient and controllable; in the embodiment 2, the expander can output stored compressed air to apply work to the blades, so as to realize the energy storage function of the device. The working medium is air, so that the cost is low, the safety and environmental protection are realized, and the low-carbon requirement is met.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The device for utilizing the compressed air energy storage coupling refrigeration is characterized by comprising an air compressor (1), wherein the outlet end of the air compressor (1) is sequentially provided with a heat exchanger (2), a filter (3), a storage tank (5), a dryer (6), a low-temperature cold air generating mechanism and an ejector (8); the inlet end and the outlet end of the storage tank (5) are respectively provided with a pressure regulating valve (4);
the outdoor ambient air is cooled by a heat exchanger (2) after being compressed by an air compressor (1), filtered by a filter (3) to remove impurities, and stored in a storage tank (5); during refrigeration, high-pressure air enters a low-temperature cold air generating mechanism from a dryer (6), active flow is generated and enters an ejector (8), the ejector (8) guides induced flow from ambient air, and cold air with proper temperature is generated after the active flow and the induced flow are fully mixed and is conveyed into a user room.
2. The device for utilizing compressed air energy storage coupling refrigeration according to claim 1, wherein the low-temperature cold air generating mechanism is a vortex tube (7), an outlet of the dryer (6) is connected with an inlet of the vortex tube (7), a cold end outlet of the vortex tube (7) is connected with an active inflow port of the ejector (8), a hot end outlet of the vortex tube (7) is communicated with an outdoor atmospheric environment, an injection inflow port of the ejector (8) is communicated with an indoor or outdoor environment, and an outlet of the ejector (8) is communicated with the indoor environment.
3. The device for refrigerating by utilizing compressed air energy storage coupling according to claim 2, wherein the cold air temperature at the outlet of the ejector (8) is regulated by changing the valve opening of the hot end outlet of the vortex tube (7).
4. The device for utilizing compressed air energy storage coupling refrigeration according to claim 1, wherein the low-temperature cool air generating mechanism is an expander (10), and a second heat exchanger (9) is additionally arranged between the dryer (6) and the expander (10); the outlet of the dryer (6) is connected with the inlet end of the expander (10) through the second heat exchanger (9), the outlet end of the expander (10) is connected with the active inflow port of the ejector (8), the ejector inflow port of the ejector (8) is communicated with the indoor or outdoor environment, and the outlet of the ejector (8) is communicated with the indoor environment.
5. Device for coupled refrigeration with compressed air energy storage according to claim 4, characterized in that a recuperative water circuit is provided between the heat exchanger (2) and the second heat exchanger (9).
6. The device for refrigerating by utilizing compressed air energy storage coupling according to claim 5, wherein a first water pump (13) and a normal-temperature water storage tank (11) are sequentially arranged between the water outlet end of the second heat exchanger (9) and the water inlet end of the heat exchanger (2) to form a first circulation branch of the return hot water.
7. The device for refrigerating by utilizing compressed air energy storage coupling according to claim 6, wherein a second water pump (14) and a hot water storage tank (12) are sequentially arranged between the water outlet end of the heat exchanger (2) and the water inlet end of the second heat exchanger (9) to form a hot water return second circulation branch.
8. Device for coupled refrigeration by means of compressed air energy storage according to any one of claims 1 to 7, characterized in that several air compressors (1) are provided, each followed by a heat exchanger (2) and a filter (3).
9. The apparatus for coupled refrigeration using compressed air energy storage of claim 8, wherein the plurality of stages of air compressors are arranged in parallel.
10. Device for coupled refrigeration by means of compressed air energy storage according to any one of claims 1 to 7, characterized in that the tank (5) is made of corrosion-resistant, temperature-resistant and high-pressure-resistant steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310545412.2A CN116481200A (en) | 2023-05-15 | 2023-05-15 | Device for coupling refrigeration by utilizing compressed air energy storage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310545412.2A CN116481200A (en) | 2023-05-15 | 2023-05-15 | Device for coupling refrigeration by utilizing compressed air energy storage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116772464A (en) * | 2023-08-18 | 2023-09-19 | 北京君腾达制冷技术有限公司 | Refrigerator aircraft nose structure |
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- 2023-05-15 CN CN202310545412.2A patent/CN116481200A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116772464A (en) * | 2023-08-18 | 2023-09-19 | 北京君腾达制冷技术有限公司 | Refrigerator aircraft nose structure |
| CN116772464B (en) * | 2023-08-18 | 2023-11-10 | 北京君腾达制冷技术有限公司 | Refrigerator aircraft nose structure |
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