CN114543381A - Vortex jet self-adaptive solar energy conversion refrigeration system - Google Patents
Vortex jet self-adaptive solar energy conversion refrigeration system Download PDFInfo
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- CN114543381A CN114543381A CN202210299110.7A CN202210299110A CN114543381A CN 114543381 A CN114543381 A CN 114543381A CN 202210299110 A CN202210299110 A CN 202210299110A CN 114543381 A CN114543381 A CN 114543381A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 49
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims abstract description 56
- 238000002347 injection Methods 0.000 claims abstract description 29
- 239000007924 injection Substances 0.000 claims abstract description 29
- 239000012530 fluid Substances 0.000 claims description 35
- 230000003044 adaptive effect Effects 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 8
- 239000002918 waste heat Substances 0.000 description 7
- 238000005338 heat storage Methods 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000002427 irreversible effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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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
- F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
- F25B9/04—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect using vortex effect
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
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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
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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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
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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
- F25B49/00—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to a vortex jet self-adaptive solar energy conversion refrigeration system, which comprises a solar heat utilization cycle and a vortex jet refrigeration cycle; the vortex injection refrigeration cycle comprises a compressor, a first ejector, a third economizer, a second ejector, a first economizer, a condenser, a second economizer, a throttle valve and an evaporator which are connected in sequence; the cold end of the vortex tube is communicated with the second economizer, and the hot end of the vortex tube is communicated with the second ejector; the solar heat utilization cycle comprises a first generator and a second generator, wherein refrigerant of the first economizer flows out and then is divided into two paths, one path of refrigerant enters the vortex tube through the first generator, the other path of refrigerant enters the first ejector through the second generator, and heat sources of the first generator and the second generator are both solar energy. The refrigeration system can effectively utilize the heat at the hot end of the vortex tube, improve the overall efficiency of the vortex tube, reduce the cost of compressed gas and be beneficial to the popularization and application of the vortex tube in the refrigeration field.
Description
Technical Field
The invention relates to the technical field of new energy refrigeration, in particular to a vortex injection self-adaptive solar energy conversion refrigeration system.
Background
Global warming has been an unsound fact, and the environmental problems it presents pose serious threats to humans as well as other living beings on earth. In this case, the demand of the refrigeration system is increasing. The demand on the refrigeration equipment is increased, and the proportion of the energy consumption of the refrigeration system in the whole social energy consumption is increased, so that the wider and higher requirements on the application range and the working efficiency of the refrigeration system are provided.
A vortex tube is an energy separation device that can separate high pressure gas into two streams of cold and hot gas. The method is applied to a plurality of fields such as scientific research, industry and the like. The vortex tube refrigeration is a refrigeration method which generates vortex by high-speed airflow under the action of a vortex tube to separate cold airflow and hot airflow and utilizes the cold airflow to obtain the refrigeration.
The vortex tube is a device which can obtain cold and hot flows simultaneously only by taking high-pressure gas as a power source without taking high-grade electric energy as power. Vortex tubes have significant advantages such as compact construction with no moving parts, low cost, zero maintenance and adjustable cold and hot flow. In the existing refrigerating system which reduces the temperature by throttling and reducing the pressure, a large amount of irreversible loss can be generated at a throttle valve. The vortex tube is applied to a refrigerating system, so that irreversible loss in a throttling process can be reduced, and the system efficiency is improved. However, the heat at the hot end of the vortex tube cannot be utilized most of the time, so that the overall efficiency of the vortex tube is low, the cost and the energy consumption of the traditional compressed gas are high, and the wide application of the vortex tube in the refrigeration field is limited. Therefore, in view of the existing problems, it is necessary to develop a vortex injection adaptive solar energy conversion refrigeration system.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the vortex injection self-adaptive solar energy conversion refrigeration system, which can effectively utilize the heat at the hot end of the vortex tube, improve the overall efficiency of the vortex tube, reduce the cost of compressed gas and be beneficial to the popularization and application of the vortex tube in the refrigeration field.
In order to achieve the purpose, the invention adopts the following technical scheme: a vortex injection self-adaptive solar energy conversion refrigeration system comprises a solar heat utilization cycle and a vortex injection refrigeration cycle; the vortex injection refrigeration cycle comprises a compressor, a first ejector, a third economizer, a second ejector, a first economizer, a condenser, a second economizer, a throttle valve and an evaporator which are connected in sequence; the cold end of the vortex tube is communicated with the second economizer, and the hot end of the vortex tube is communicated with the second ejector; the solar heat utilization cycle comprises a first generator and a second generator, refrigerant of the first generator flows out and then is divided into two paths, one path of refrigerant enters the vortex tube through the first generator, the other path of refrigerant enters the first ejector through the second generator, and heat sources of the first generator and the second generator are both solar energy.
As a preferable scheme of the present invention, in the vortex injection refrigeration cycle, an outlet fluid of the condenser is divided into two paths, and a first path of fluid returns to the compressor after sequentially passing through a first electromagnetic valve, a second economizer, a throttle valve and an evaporator; the second path of fluid returns to the compressor after sequentially passing through a third electromagnetic valve, a first circulating pump, a third economizer, a first generator, a vortex tube, a second economizer, a filter and a second electromagnetic valve; the first path of fluid and the second path of fluid exchange heat in the second economizer.
As a preferable aspect of the present invention, the solar heat utilization cycle further includes a first solar collector and a second solar collector, the first solar collector is connected to the first generator by a pump, and the second solar collector is connected to the second generator by a pump.
As a preferable scheme of the invention, the condenser further comprises a first three-way joint, an outlet of the condenser is communicated with an inlet of the first three-way joint, and an outlet of the first three-way joint is respectively connected with the first electromagnetic valve and the third electromagnetic valve.
As a preferable scheme of the invention, a second three-way joint is arranged at the outlet of the cold side of the first economizer and is communicated with the inlet of the second three-way joint, and the outlet of the second three-way joint is respectively connected to the first generator through a fourth electromagnetic valve and a sixth circulating pump and is connected to the second generator through a sixth electromagnetic valve.
As a preferable aspect of the present invention, the first solar collector is connected to the fourth circulation pump through a first three-way valve and a second three-way valve.
As a preferable scheme of the invention, the heat storage system further comprises a second heat storage device, a fourth three-way valve is arranged between the second heat storage device and the second circulating pump in a communication manner, and the fourth three-way valve is connected to the first generator through the third three-way valve and the fourth three-way valve.
As a preferable scheme of the present invention, the heat storage system further comprises a first heat reservoir, a fifth three-way valve is arranged between the first heat reservoir and the third circulating pump, and the first heat reservoir is connected to the second generator through the fifth circulating pump.
In a preferred embodiment of the present invention, the first heat reservoir and the second heat reservoir are both graphene phase-change heat reservoirs.
In a preferred aspect of the present invention, the vortex tube has a converging portion and a diverging portion, and an inner diameter of the converging portion is smaller than an inner diameter of the diverging portion.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the vortex injection self-adaptive solar energy conversion refrigeration system, high-grade heat energy provided by solar energy is converted into cold energy through the vortex tube, waste heat generated by the vortex tube drives the ejector to eject the refrigerant to realize third-stage pressurization, low-grade heat energy provided by the solar energy drives the ejector to eject the refrigerant to realize second-stage pressurization, the pressure ratio and the power consumption of a compressor are reduced through the third-stage pressurization, and the performance and the thermal efficiency of the system are improved.
2. The vortex jet self-adaptive solar energy conversion refrigeration system adopts the vortex refrigeration technology and the jet pressurization technology, reduces moving parts of the system, greatly reduces the operation cost of the system and improves the safety and stability of the system.
3. According to the vortex jet self-adaptive solar energy conversion refrigeration system, the solar energy can be stored by regulating and controlling the three-way valves, and when the solar energy is insufficient, the stored heat can be released to continuously drive the system to operate.
4. The vortex jet self-adaptive solar energy conversion refrigeration system can adaptively optimize and regulate the opening of the electromagnetic valve to enable the system to normally operate according to different weather conditions.
5. According to the vortex injection self-adaptive solar energy conversion refrigeration system, the temperature gradient slippage effect of single-phase refrigerant heat exchange is utilized, the cold quantity carried by cold fluid is better utilized, and the irreversibility of the throttling valve is reduced.
Drawings
FIG. 1 is a schematic flow diagram of a vortex injection adaptive solar energy conversion refrigeration system according to an embodiment of the present invention.
Reference numerals: 1. an evaporator; 2. a compressor; 3. a first ejector; 4. a second ejector; 5. a first economic device; 6. a condenser; 7. a first three-way joint; 8. a first solenoid valve; 9. a second economizer; 10. a throttle valve; 11. a filter; 12. a second solenoid valve; 13. a third electromagnetic valve; 14. a first circulation pump; 15. a fourth solenoid valve; 16. a first generator; 17. a vortex tube; 18. a fifth solenoid valve; 19. a sixth electromagnetic valve; 20. a second generator; 21. a first heat reservoir; 22. an eighth three-way valve; 23. a second solar collector; 24. a third circulation pump; 25. a fifth three-way valve; 26. a sixth three-way valve; 27. a fifth circulation pump; 28. a seventh three-way valve; 29. a second heat reservoir; 30. a second three-way valve; 31. a first solar collector; 32. a second circulation pump; 33. a fourth three-way valve; 34. a third three-way valve; 35. a second three-way valve; 36. a fourth circulation pump; 37. a second three-way joint; 38. a sixth circulation pump; 39. a seventh electromagnetic valve; 40. an eighth solenoid valve; 41. and a third economizer.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings.
Example (b): as shown in fig. 1, a vortex injection adaptive solar energy conversion refrigeration system includes a solar heat utilization cycle and a vortex injection refrigeration cycle; the vortex injection refrigeration cycle comprises a compressor 2, a first ejector 3, a third economizer 41, a second ejector 4, a first economizer 5, a condenser 6, a second economizer 9, a throttle valve 10 and an evaporator 1 which are connected in sequence; the cold end of the vortex tube 17 is communicated with the second economizer 9, and the hot end of the vortex tube 17 is communicated with the second ejector 4; the solar heat utilization cycle comprises a first generator 16 and a second generator 20, the refrigerant of the first economizer 5 flows out and is divided into two paths, one path enters the vortex tube 17 through the first generator 6, the other path enters the first ejector 3 through the second generator 20, and heat sources of the first generator 16 and the second generator 20 are both solar energy.
In the vortex jet refrigeration cycle, the outlet fluid of the condenser 6 is divided into two paths, and the first path of fluid returns to the compressor 2 after sequentially passing through the first electromagnetic valve 8, the second economizer 9, the throttle valve 10 and the evaporator 1; the second path of fluid returns to the compressor 2 after sequentially passing through a third electromagnetic valve 13, a first circulating pump 14, a third economizer 41, a first economizer 5, a first generator 16, a vortex tube 17, a second economizer 9, a filter 11 and a second electromagnetic valve 12; the first path of fluid exchanges heat with the second path of fluid in the second economizer 9.
The solar heat utilization cycle further includes a first solar collector 11 and a second solar collector 23, the first solar collector 11 is connected to the first generator 16 by a pump, and the second solar collector 23 is connected to the second generator 20 by a pump.
The specific connection relationship of the vortex injection self-adaptive solar energy conversion refrigerating system is as follows: the outlet of the condenser 6 is communicated with the inlet of a first three-way joint 7, the first outlet of the first three-way joint 7 is communicated with the inlet of a first electromagnetic valve 8, the outlet of the first electromagnetic valve 8 is communicated with the hot side inlet of a second economizer 9, the outlet of the hot side of the second economizer 9 is communicated with the inlet of a throttle valve 10, the outlet of the throttle valve 10 is communicated with the inlet of an evaporator 1, the outlet of the evaporator 1 is communicated with the main inlet of a compressor 2, the second outlet of the first three-way joint 7 is communicated with the inlet of a first circulating pump 14, the outlet of the first circulating pump 14 is communicated with the cold side inlet of a third economizer 41, the outlet of the cold side of the third economizer 41 is communicated with the cold side inlet of the first economizer 5, the outlet of the cold side of the first economizer 5 is communicated with the inlet of a second three-way joint 37, the first outlet of the second three-way joint 37 is communicated with the inlet of a fourth electromagnetic valve 15, the outlet of the fourth 15 is communicated with the inlet of a sixth circulating pump 38, the outlet of the sixth circulating pump 38 is communicated with the cold side inlet of the first generator 16, the cold side outlet of the first generator 16 is communicated with the inlet of a vortex tube 17, the cold side outlet of the vortex tube 17 is communicated with the cold side inlet of a second economizer 9, the cold side outlet of the second economizer 9 is communicated with the inlet of a filter 11, the outlet of the filter 11 is communicated with the inlet of a second electromagnetic valve 12, the outlet of the second electromagnetic valve 12 is communicated with the air supplement inlet of a compressor 2, the outlet of the compressor 2 is communicated with the injection inlet of a first ejector 3, the hot side outlet of the vortex tube 17 is communicated with the inlet of a fifth electromagnetic valve 18, the outlet of the fifth electromagnetic valve 18 is communicated with the working inlet of a second ejector 4, the second outlet of a second three-way joint 37 is communicated with the inlet of a sixth electromagnetic valve 19, the outlet of the sixth electromagnetic valve 19 is communicated with the cold side inlet of a second generator 20, the cold side outlet of the second generator 20 is communicated with the working inlet of the first ejector 3, the outlet of the first ejector 3 is communicated with the inlet of a third economizer 41, the hot side outlet of the third economizer 41 is communicated with the injection inlet of the second ejector 4, an outlet of the second ejector 4 is communicated with a hot side inlet of the first economizer 5, a hot side outlet of the first economizer 5 is communicated with an inlet of the condenser 6, an outlet of the first solar heat collector 31 is communicated with a second interface of the first three-way valve 30, a first interface of the first three-way valve 30 is communicated with a first interface of the second three-way valve 35, a second interface of the second three-way valve 35 is communicated with an inlet of the fourth circulating pump 36, an outlet of the fourth circulating pump 36 is communicated with a hot side inlet of the first generator 16, a hot side outlet of the first generator 16 is communicated with a second interface of the third three-way valve 34, a first interface of the third three-way valve 34 is communicated with a first interface of the fourth three-way valve 33, a third interface of the third three-way valve 33 is communicated with a cold side inlet of the second heat reservoir 29, a cold side outlet of the second heat reservoir 29 is communicated with a third interface of the second three-way valve 35, an outlet of the second heat reservoir 29 is communicated with a third interface of the fourth three-way valve 33, a second interface of the fourth three-way valve 33 is communicated with a second interface of the second three-way valve 33, a second interface of the second three-way valve 33 is communicated with an inlet of the second circulating pump 32 and an inlet of the seventh electromagnetic valve 39, an outlet of a seventh electromagnetic valve 39 is communicated with an inlet of a third circulating pump 24, an outlet of a second circulating pump 32 is communicated with an inlet of a first solar heat collector 31, an outlet of a second solar heat collector 23 is communicated with an inlet of the third circulating pump 24, an outlet of the third circulating pump 24 is communicated with a second interface of a fifth three-way valve 25, a third interface of the fifth three-way valve 25 is communicated with a hot side inlet of the first heat reservoir 21, a hot side outlet of the first heat reservoir 21 is communicated with a second interface of an eighth three-way valve 22, a first interface of the fifth three-way valve 25 is communicated with a first interface of a sixth three-way valve 26, a second interface of the sixth three-way valve 26 is communicated with an inlet of the fifth circulating pump 27, an outlet of the fifth circulating pump 27 is communicated with an inlet of the second generator 20, a hot side outlet of the second generator 20 is communicated with a third interface of the seventh three-way valve 28, a second interface of the seventh three-way valve 28 is communicated with a cold side inlet of the first heat reservoir 21, an outlet of the first heat reservoir 21 is communicated with a second interface of the sixth three-way valve 26, the first port of the seventh three-way valve 28 is communicated with the first port of the eighth three-way valve 22 and the inlet of the eighth electromagnetic valve 40, the outlet of the eighth electromagnetic valve 40 is communicated with the inlet of the first solar heat collector, and the third port of the eighth three-way valve 22 is communicated with the inlet of the second solar heat collector 23.
In this embodiment, the refrigerant adopted by the whole system is an environment-friendly refrigerant R245fa, the refrigerant is condensed into a saturated liquid state in the condenser 6, the refrigerant is divided into two streams of fluid by the first three-way joint 7, the second stream of fluid is pressurized by the first circulating pump 14 and then is conveyed into the third economizer 41 for the first preheating, the preheated first stream of fluid enters the first economizer 5 for the second preheating by the fluid at the outlet of the second ejector 4, the preheated second stream of fluid is then divided by the second three-way joint 37, the first stream of fluid divided by the second three-way joint 37 is pressurized by the sixth circulating pump 38, the high-grade heat energy provided by solar energy is absorbed in the first generator 16 and becomes a high-grade high-pressure steam refrigerant, the high-grade high-pressure steam refrigerant enters the two streams of tubes 17 to form cold fluid and hot fluid, the cold fluid in the vortex tube 17 flows out from the cold end of the vortex tube and enters the second economizer 9 to pre-cool the second stream divided by the first three-way joint, cold fluid after cold energy release in the second economizer 9 enters the compressor 2 through a gas supplementing port of the compressor 2 and is compressed to a first intermediate pressure, and hot fluid in the vortex tube 17 flows out of the hot end and enters the second ejector 4 to drive the second ejector 4 to eject refrigerant from an outlet at the hot side of the third economizer 41.
A second fluid flowing out of the first three-way joint is subcooled through a second economizer 9, a subcooled liquid refrigerant is throttled to evaporation temperature and pressure through a throttle valve 10 and then enters the evaporator 1 to release cold energy, the refrigerant after the cold energy is released in the evaporator 1 becomes a saturated or superheated steam refrigerant and flows out of an outlet of the evaporator 1, the refrigerant enters the compressor 2 through a main inlet of the compressor 2 to be compressed for the first time, and then the refrigerant is mixed with the refrigerant entering from the air supplementing port and compressed for the second time to be compressed to first intermediate pressure; the second fluid branched out by the second three-way joint 37 absorbs low-grade heat energy provided by solar energy in the second generator 20 and is changed into low-grade secondary high-pressure steam, the low-grade secondary high-pressure steam drives the first ejector 3 to inject the refrigerant at the outlet of the booster compressor 2 to a second intermediate pressure, the refrigerant under the second intermediate pressure is pre-cooled by the third economizer 41, the pre-cooled refrigerant is injected and pressurized to a condensing pressure by the second ejector 4, the refrigerant at the outlet of the second ejector 4 enters the economizer 5 for pre-cooling, meanwhile, the refrigerant coming out of the first circulating pump is preheated, the pre-cooled refrigerant flows out from the outlet of the first economizer at the hot side, enters the condenser 6 for complete condensation and liquefaction, and then enters the next circulation.
In this embodiment, the outlet of the condenser 6 to the inlet of the second three-way joint 37 forms a first pipeline; the first outlet of the second three-way joint 37 to the inlet of the vortex tube 17 forms a second pipeline; a third pipeline is formed from a hot end outlet of the vortex tube 17 to a working inlet of the second ejector 4; a fourth pipeline is formed from the outlet of the condenser 6 to the inlet of the hot side of the second economizer 9; a fifth pipeline is formed from the hot side outlet of the second economizer 9 to the main inlet of the compressor 2; a sixth pipeline is formed from the outlet of the cold end of the vortex tube 17 to the air supplement port of the compressor 2; a seventh pipeline is formed from the outlet of the compressor 2 to the injection inlet of the first ejector 3; an eighth pipeline is formed from the outlet of the first ejector 3 to the injection inlet of the second ejector 4; the second outlet of the second three-way valve 37 to the working inlet of the first ejector 3 forms a ninth line; the outlet of the second ejector 4 to the inlet of the condenser 6 form a tenth pipeline; an eleventh pipeline is formed from the outlet of the first solar collector 31 to the first interface of the fourth three-way valve 33; a twelfth pipeline is formed from the outlet of the first solar heat collector 31 to the third interface of the fourth three-way valve 33; the cold side outlet of the first heat reservoir 29 to the cold side inlet of the second heat reservoir 29 forms a thirteenth pipe; a fourteenth pipeline is formed from the outlet of the second solar heat collector 23 to the first interface of the eighth three-way valve 22; a fifteenth pipeline is formed from the outlet of the second solar heat collector 23 to the third port of the eighth three-way valve 22; a sixteenth pipeline is formed from the cold side outlet of the first heat reservoir 21 to the cold side inlet of the second heat reservoir 29, a seventeenth pipeline is formed from the second outlet of the fourth three-way valve 33 to the inlet of the third circulating pump 24, and an eighteenth pipeline is formed from the first outlet of the seventh three-way valve 28 to the inlet of the first solar heat collector 31; the first pipeline is pressurized at the circulating pump 14 to change the refrigerant into high-pressure liquid fluid, and is preheated at the third economizer 41 and the first economizer 5, and the first pipeline effectively utilizes the waste heat of the eighth pipeline and the tenth pipeline, so that the heat efficiency of the system is increased; the second pipeline refrigerant absorbs high-grade heat energy provided by solar energy at the first generator 16 and then is converted into high-grade high-pressure steam refrigerant, and cold flow and hot flow are obtained at the vortex tube 17; the sixth pipeline is used for supercooling the refrigerant of the fourth pipeline, so that the irreversible loss of the fifth pipeline is reduced, the refrigeration capacity grade of the refrigerant of the fifth pipeline is increased, and the power consumption of the compressor 2 is reduced by the sixth pipeline; the third pipeline provides heat energy for ejecting the eighth pipeline, and the third pipeline fully utilizes waste heat generated by the vortex tube 17; the ninth pipeline absorbs low-grade heat energy provided by solar energy at the second generator 20 and drives the first ejector 3 to eject the seventh pipeline refrigerant, so that the seventh pipeline refrigerant is pressurized to the second intermediate pressure, the ninth pipeline can utilize solar energy in a region with weak solar radiation in a confined space, the ninth pipeline can preheat the first pipeline for the first time, simultaneously reduce the superheat degree of the refrigerant entering an ejection port of the second ejector 4, and increase the efficiency of the second ejector 4; the tenth line uses heat carried by the refrigerant at the outlet of the second ejector 4 for preheating the first line, thereby recovering waste heat as much as possible.
The system may further include a first three-way valve 30, a second three-way valve 35, a third three-way valve 34, a fourth three-way valve 35, a fifth three-way valve 25, a sixth three-way valve 26, a seventh three-way valve 28, and an eighth three-way valve 22 on the twelfth pipeline, the fifteenth pipeline, the thirteenth pipeline, and the sixteenth pipeline, respectively. When the solar energy is excessive, the second port and the third port of the first three-way valve 30 may be communicated, the second port and the third port of the fourth three-way valve 33 may be communicated, the second port and the third port of the fifth three-way valve 25 may be communicated, the second port and the third port of the eighth three-way valve 22 may be communicated, and the twelfth pipeline and the fifteenth pipeline may store heat for the first heat reservoir 21 and the second heat reservoir 29, respectively; when the total solar radiation is insufficient, the second port and the third port of the second three-way valve 34 are communicated, the second port and the third port of the third three-way valve 34 are communicated, the second port and the third port of the sixth three-way valve 26 are communicated, the second port and the third port of the seventh three-way valve 28 are communicated, and the heat energy output of the first heat reservoir 21 and the heat energy output of the second heat reservoir 29 can be continuously driven to operate through the thirteenth pipeline and the sixteenth pipeline. The first heat reservoir 21 and the second heat reservoir 29 are both graphene phase change heat reservoirs, so that the heat storage performance of the heat reservoirs can be effectively guaranteed, and the use of the system is further guaranteed.
In the present system, the seventh solenoid valve 39 and the eighth solenoid valve 40 are disposed on the seventeenth pipeline and the eighteenth pipeline, so that when the heat collected by the second solar collector 23 is insufficient, the opening degree of the seventh solenoid valve 39 and the eighth solenoid valve 40 is adjusted to conduct a part of the return heat of the first solar collector 31 to the second generator 20 through the seventeenth pipeline and the eighteenth pipeline for auxiliary heat supply, thereby enabling the first injector 3 to continue to operate normally.
The system converts high-pressure liquid refrigerant into high-pressure gaseous refrigerant through solar energy, converts the high-pressure gaseous refrigerant into flow body carrying cold and hot fluid carrying heat by using the vortex tube 17, wherein the cold fluid supercools a second refrigerant which is branched out from the first tee joint 7 through the second economizer 9, the irreversibility at the throttle valve 10 can be reduced, the cold density of the refrigerant passing through the evaporator 1 is improved, and the hot fluid is used for driving the second ejector 4 to work.
The waste heat generated by the vortex tube 17 drives the second ejector 4 to eject the refrigerant from the outlet of the third economizer 41, so that the pressure ratio of the compressor is reduced, and the power consumption of the compressor is reduced.
The system utilizes the third economizer 41 to preheat the refrigerant at the outlet of the first circulating pump 14 by using the redundant heat of the refrigerant at the outlet of the first ejector 3, thereby reducing the superheat degree of the refrigerant at the injection inlet of the second ejector 4 and improving the efficiency of the second ejector 4.
The bottom of the vortex tube 17 is provided with a small conical control valve to control the temperature pressure and the cold-hot flow ratio corresponding to the designated application of the vortex tube 17, and the vortex tube 17 adopts a convergent-divergent tube to more effectively realize the fluid temperature separation.
The system utilizes the air-supplying enthalpy-increasing technology to increase the pressure of the cold fluid after the cold quantity is released to the first intermediate pressure, and the power consumption of the compressor 2 is reduced.
The refrigerant is pressurized by the first circulation pump 14, is preheated twice by the third economizer 41 and the first economizer 5, and is converted into a high-pressure gas by absorbing heat provided by solar energy at the first generator 16 and the second generator 20. In the process, the collected solar heat energy is fully utilized, and the heat efficiency of the system is improved.
According to the system, the first ejector 3 is driven by low-grade heat energy provided by solar energy to eject the refrigerant at the outlet of the compressor 2 to realize second-stage pressurization, the second ejector 4 is driven by waste heat generated by the vortex tube 17 to eject the refrigerant to realize third-stage pressurization, the pressure ratio and power consumption of the compressor are reduced through the three-stage pressurization, and the performance and thermal efficiency of the system are improved.
The first solar heat collector 31 in the system is placed at a position with good solar radiation in a limited space, the grade of the collected solar energy is relatively high, the second solar heat collector 23 is placed at a position with poor solar radiation in the limited space, the grade of the collected solar energy is slightly low, high-grade heat energy provided by the solar energy is converted into cold energy through a vortex tube, low-grade heat energy provided by the solar energy is used for driving an ejector to inject and pressurize, and the solar energy in the limited space is better utilized.
When the total solar radiation is insufficient, the second port and the third port of the second three-way valve 35 are communicated, the second port and the third port of the third three-way valve 34 are communicated, the second port and the third port of the sixth three-way valve 26 are communicated, the second port and the third port of the seventh three-way valve 28 are communicated, and the heat energy output of the first heat reservoir 21 and the heat energy output of the second heat reservoir 29 can be continuously driven to operate through the thirteenth pipeline and the sixteenth pipeline.
When the heat collected by the second solar collector 23 is insufficient, a part of the reflux heat of the first solar collector 31 is conducted to the second generator 20 through the seventeenth and eighteenth pipelines to perform auxiliary heating by adjusting the opening degrees of the seventh and eighth solenoid valves 39 and 40, so that the first ejector 3 can continue to operate normally.
The solar energy conversion refrigeration system in the embodiment combines the characteristics of no moving part, simple structure and high stability of the vortex tube 17, the first ejector 3 and the second ejector 4, can widely utilize the characteristic of low-grade energy, the vortex tube 17 divides high-pressure gas into cold and hot two flows, the vortex tube 17 replaces a large-temperature-difference throttling valve to reduce the irreversible loss, the characteristic of combining the vortex tube 17 with the refrigerant utilizes the characteristic of driving the ejector by waste heat of the vortex tube 17, the characteristic of injecting and pressurizing the refrigerant from the outlet of the compressor 2 through the ejector 3 is utilized, and the characteristic of pressurizing the saturated gaseous refrigerant carrying low-density cold energy based on the air-supplementing enthalpy-increasing principle is utilized. According to the invention, the high-pressure liquid refrigerant is converted into the high-pressure gaseous refrigerant by utilizing the heat energy improved by solar energy, the heat energy is converted into the cold energy through the vortex tube 17, and the power consumption is greatly reduced compared with the traditional refrigeration mode of directly compressing air and then passing through the vortex tube. The secondary throttling and compressor air-supplying enthalpy-increasing technology is utilized to improve the cold density of the refrigerant and reduce the power consumption of the compressor.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more here: 1. an evaporator; 2. a compressor; 3. a first ejector; 4. a second ejector; 5. a first economic device; 6. a condenser; 7. a first three-way joint; 8. a first solenoid valve; 9. a second economizer; 10. a throttle valve; 11. a filter; 12. a second solenoid valve; 13. a third electromagnetic valve; 14. a first circulation pump; 15. a fourth solenoid valve; 16. a first generator; 17. a vortex tube; 18. a fifth solenoid valve; 19. a sixth electromagnetic valve; 20. a second generator; 21. a first heat reservoir; 22. an eighth three-way valve; 23. a second solar collector; 24. a third circulation pump; 25. a fifth three-way valve; 26. a sixth three-way valve; 27. a fifth circulation pump; 28. a seventh three-way valve; 29. a second heat reservoir; 30. a second three-way valve; 31. a first solar collector; 32. a second circulation pump; 33. a fourth three-way valve; 34. a third three-way valve; 35. a second three-way valve; 36. a fourth circulation pump; 37. a second three-way joint; 38. a sixth circulation pump; 39. a seventh electromagnetic valve; 40. an eighth solenoid valve; 41. third economizer, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. The utility model provides a vortex sprays self-adaptation solar energy conversion refrigerating system which characterized in that: comprises a solar heat utilization cycle and a vortex jet refrigeration cycle; the vortex injection refrigeration cycle comprises a compressor (2), a first ejector (3), a third economizer (41), a second ejector (4), a first economizer (5), a condenser (6), a second economizer (9), a throttle valve (10) and an evaporator (1) which are connected in sequence; the cold end of the vortex tube (17) is communicated with the second economizer (9), and the hot end of the vortex tube (17) is communicated with the second ejector (4); the solar heat utilization cycle comprises a first generator (16) and a second generator (20), refrigerant of the first economizer (5) flows out and then is divided into two paths, one path enters the vortex tube (17) through the first generator (6), the other path enters the first ejector (3) through the second generator (20), and heat sources of the first generator (16) and the second generator (20) are both solar energy.
2. The vortex injection adaptive solar conversion refrigeration system of claim 1, wherein: in the vortex jet refrigeration cycle, fluid at an outlet of the condenser (6) is divided into two paths, and the first path of fluid returns to the compressor (2) after sequentially passing through a first electromagnetic valve (8), a second economizer (9), a throttle valve (10) and the evaporator (1); the second path of fluid returns to the compressor (2) after sequentially passing through a third electromagnetic valve (13), a first circulating pump (14), a third economizer (41), a first economizer (5), a first generator (16), a vortex tube (17), a second economizer (9), a filter (11) and a second electromagnetic valve (12); the first path of fluid exchanges heat with the second path of fluid in a second economizer (9).
3. A vortex injection adaptive solar conversion refrigeration system according to claim 2, wherein: the solar heat utilization cycle further comprises a first solar collector (11) and a second solar collector (23), the first solar collector (11) is connected to the first generator (16) by a pump, and the second solar collector (23) is connected to the second generator (20) by a pump.
4. A vortex injection adaptive solar conversion refrigeration system according to claim 3, wherein: still include first three way connection (7), condenser (6) export intercommunication first three way connection (7) entry, first solenoid valve (8) and third solenoid valve (13) are connected respectively to the export of first three way connection (7).
5. The vortex injection adaptive solar conversion refrigeration system of claim 4, wherein: and a second three-way joint (37) is arranged at a cold side outlet of the first economizer (5) and is communicated with an inlet of the second three-way joint (37), an outlet of the second three-way joint (37) is connected to the first generator (16) through a fourth electromagnetic valve (15) and a sixth circulating pump (38) respectively, and is connected to the second generator (20) through a sixth electromagnetic valve (19).
6. The system according to claim 5, wherein the system comprises: the first solar heat collector (31) is connected with a fourth circulating pump (36) through a first three-way valve (30) and a second three-way valve (35).
7. The vortex injection adaptive solar conversion refrigeration system of claim 6, wherein: still include second heat reservoir (29), it is equipped with fourth three-way valve (33) to communicate between second heat reservoir (29) and second circulating pump (32), is connected to first generator (16) through third three-way valve (34), fourth three-way valve (33).
8. The vortex injection adaptive solar conversion refrigeration system of claim 7, wherein: still include first heat reservoir (21), be equipped with fifth three-way valve (25) between first heat reservoir (21) and third circulating pump (24), just first heat reservoir (21) are connected to second generator (20) through fifth circulating pump (27).
9. The vortex injection adaptive solar conversion refrigeration system of claim 8, wherein: the first heat reservoir (21) and the second heat reservoir (29) are both graphene phase change heat reservoirs.
10. The vortex injection adaptive solar conversion refrigeration system of claim 7, wherein: the vortex tube (17) has a converging portion and a diverging portion, and the inner diameter of the converging portion is smaller than that of the diverging portion.
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