CN113701385B - Supersonic refrigeration system driven by thermoacoustic compressor - Google Patents
Supersonic refrigeration system driven by thermoacoustic compressor Download PDFInfo
- Publication number
- CN113701385B CN113701385B CN202010898663.5A CN202010898663A CN113701385B CN 113701385 B CN113701385 B CN 113701385B CN 202010898663 A CN202010898663 A CN 202010898663A CN 113701385 B CN113701385 B CN 113701385B
- Authority
- CN
- China
- Prior art keywords
- supersonic
- refrigeration
- thermoacoustic
- compressor
- cyclone separator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 139
- 239000007788 liquid Substances 0.000 claims description 44
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 26
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 44
- 239000003507 refrigerant Substances 0.000 description 23
- 230000006835 compression Effects 0.000 description 14
- 238000007906 compression Methods 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 229910052734 helium Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 241000628997 Flos Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000353097 Molva molva Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- F25B9/006—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant containing more than one component
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Jet Pumps And Other Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a method for preparingThe technical field of refrigeration, discloses a supersonic refrigeration system driven by a thermoacoustic compressor, which comprises a refrigeration unit and an evaporator, wherein the refrigeration unit comprises the thermoacoustic compressor and a supersonic cyclone separator which are connected, the tail end of the supersonic cyclone separator is provided with a diffuser, and the evaporator is connected in series at the inlet of the diffuser of the supersonic cyclone separator. The supersonic refrigeration system driven by the thermoacoustic compressor provided by the invention is provided with the supersonic cyclone separator based on the supersonic refrigeration effect as an expansion cooling element, and has the advantages of high efficiency, small pressure drop, large temperature drop, low energy consumption, good stability and long-term reliability compared with the traditional throttling devices such as a throttle valve, an expander and the like; the thermo-acoustic compressor is adopted to replace the traditional compressor, can be driven by heat energy, does not have mechanical moving parts, and has the advantages of low vibration and high reliability; the system employs an environmentally friendly CO 2 And N 2 And (Ar/He) and the like are used as circulating working media and are more environment-friendly.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a supersonic speed refrigeration system driven by a thermoacoustic compressor.
Background
The traditional vapor compression refrigeration system consists of four main components, namely a compressor, a condenser, a throttling device, an evaporator and the like, wherein all the components are sequentially connected through pipelines to form a completely closed circulation system. The compressor sucks the low-temperature and low-pressure refrigerant vapor back from the evaporator, and high-temperature and high-pressure gas is formed after compression; the condenser cools the high-temperature high-pressure gaseous refrigerant discharged by the compressor and releases heat, and the gaseous refrigerant is condensed into a gas-liquid mixture under certain pressure and temperature; the throttling device decompresses and throttles and expands the high-pressure refrigerant into low-temperature and low-pressure liquid; the throttled low-temperature and low-pressure refrigerant liquid is evaporated (boiled) in the evaporator to become vapor, and the heat of the cooled substance is absorbed, so that the temperature of the substance is reduced. The refrigerant circulates in a closed refrigeration system in a fluid state, continuously absorbs heat from the evaporator through phase change, and releases heat in the condenser, thereby achieving the purpose of refrigeration.
Although the vapor compression refrigeration technology is mature, the defects that mechanical moving parts in a compressor are easy to wear and damage, and a throttling device is low in efficiency, large in pressure drop, high in energy consumption and the like still exist.
Disclosure of Invention
The embodiment of the invention provides a supersonic refrigeration system driven by a thermoacoustic compressor, which is used for solving or partially solving the problems that although the vapor compression refrigeration technology is mature in the prior art, the compressor is easy to wear and damage, and a throttling device is low in efficiency, large in pressure drop and high in energy consumption.
The embodiment of the invention provides a supersonic refrigeration system driven by a thermoacoustic compressor, which comprises at least one refrigeration unit, wherein the refrigeration unit comprises a thermoacoustic compressor and a supersonic cyclone separator which are connected, the refrigeration unit also comprises an evaporator, a diffuser is arranged at the tail end of the supersonic cyclone separator, and the evaporator is serially connected at the inlet of the diffuser of the supersonic cyclone separator.
On the basis of the scheme, the supersonic cyclone separator is provided with a liquid outlet, the liquid outlet is connected with the inlet of the evaporator, and the outlet of the evaporator is connected with the inlet of the diffuser through a return pipeline.
On the basis of the scheme, the return pipeline is provided with a return one-way valve.
On the basis of the scheme, when the refrigerating system comprises one refrigerating unit, the outlet of the thermoacoustic compressor is connected with the inlet of the supersonic cyclone separator, and the outlet of the supersonic cyclone separator is connected with the inlet of the compressor.
On the basis of the scheme, when the refrigerating system comprises a plurality of refrigerating units, the plurality of refrigerating units are sequentially connected end to form a circulating loop.
On the basis of the scheme, a plurality of evaporators are arranged in the plurality of refrigeration units in a one-to-one correspondence manner; or a plurality of the refrigeration units are all connected to one evaporator.
On the basis of the scheme, a high-pressure one-way valve is arranged between the thermoacoustic compressor and the supersonic cyclone separator; and a low-pressure one-way valve is arranged on an inlet pipeline of the thermoacoustic compressor.
On the basis of the scheme, the thermoacoustic compressor comprises a standing wave type thermoacoustic compressor or a traveling wave type thermoacoustic compressor.
On the basis of the scheme, the refrigerating working medium of the refrigerating system comprises CO 2 、He、N 2 Ne, ar and H 2 At least two of O; and the liquefaction temperatures of different types of refrigeration working media are different.
On the basis of the scheme, the supersonic cyclone separator further comprises a cyclone device, a Laval nozzle expander and a cyclone gas-liquid separator which are sequentially connected, a liquid collecting device is arranged on the cyclone gas-liquid separator, a liquid outlet is formed in the liquid collecting device, a gas outlet of the cyclone gas-liquid separator is connected to an inlet of the diffuser, and an outlet of the diffuser is connected with guide vanes.
The supersonic refrigeration system driven by the thermoacoustic compressor provided by the embodiment of the invention is provided with the supersonic cyclone separator based on the supersonic refrigeration effect as an expansion cooling element, and has the advantages of high efficiency, small pressure drop, large temperature drop, low energy consumption, good stability (the supersonic cyclone separator does not have a rotating part per se) and long-term reliability compared with the traditional throttling devices in a steam compression refrigeration system such as a throttling valve and an expander; the thermo-acoustic compressor is adopted to replace the traditional compressor, no mechanical moving part exists, and the thermo-acoustic compressor has the advantages of low vibration, high reliability and long service life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating the connection of a standing wave type thermo-acoustic compressor in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the connection of a traveling-wave type thermoacoustic compressor in accordance with an embodiment of the present invention;
FIG. 3 is a schematic illustration of the configuration of a supersonic cyclonic separator in an embodiment of the present invention;
FIG. 4 is a schematic view of a first connection of a plurality of refrigeration units in an embodiment of the present invention;
fig. 5 is a second schematic view of a plurality of refrigeration units in an embodiment of the present invention.
Reference numerals:
11. a standing wave type thermo-acoustic compressor; 111. a thermal chamber; 112. a heater; 113. a heat regenerator; 114. a room temperature heat exchanger; 115. a resonant tube; 12. a traveling wave type thermo-acoustic compressor; 121. a feedback tube; 122. a room temperature heat exchanger; 123. a heat regenerator; 124. a heater; 125. a thermal buffer tube; 126. a secondary heat exchanger; 127. an elastic film; 128. a resonant tube; 2. a supersonic cyclonic separator; 21. a swirling device; 22. a Laval nozzle expander; 23. a cyclonic gas-liquid separator; 24. a diffuser; 25. a guide blade; 26. a liquid collection device; 27. a backflow check valve; 221. a stabilization section; 222. a subsonic contraction section; 223. a throat; 224. a supersonic expansion section; 3. an evaporator; 4. a high pressure check valve; 5. a low pressure check valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to FIG. 1, an embodiment of the present invention provides a supersonic refrigeration system driven by a thermoacoustic compressor, the refrigeration system comprising at least one refrigeration unit. The refrigeration unit comprises a thermoacoustic compressor and a supersonic cyclone 2 connected. The refrigeration unit further comprises an evaporator 3. The supersonic cyclonic separator 2 is terminated with a diffuser 24. The evaporator 3 is arranged in series at the inlet of the diffuser 24 of the supersonic cyclone 2.
The supersonic cyclone separator 2 based on supersonic refrigeration effect was first applied in 1989 for the separation of gas and liquid. Then the natural gas is introduced into the field of natural gas treatment and processing, and is mainly used for dehydration and heavy hydrocarbon removal of natural gas. The supersonic cyclone separator 2 has both a refrigeration effect and is provided with a diffuser 24 at the end. The refrigeration system provided by the embodiment provides that the supersonic cyclone separator 2 is arranged to replace a throttling device in the traditional refrigeration system. The cooling effect of the traditional throttling device is achieved by utilizing the refrigeration effect of the supersonic cyclone separator 2; and the refrigerant flowing through the evaporator 3 is introduced into the diffuser 24, so that the boosting and temperature rising effects of the refrigerant flowing out of the evaporator 3 can be realized. Therefore, the pressure drop of the traditional throttling device to the refrigerating working medium can be compensated.
The supersonic refrigeration system driven by the thermoacoustic compressor provided by the embodiment is provided with the supersonic cyclone separator 2 based on the supersonic refrigeration effect as an expansion cooling element, and has the advantages of high efficiency, small pressure drop, large temperature drop, low energy consumption, good stability (the supersonic cyclone separator 2 does not have a rotating part per se) and long-term reliability compared with the traditional throttling devices such as a throttling valve, an expander and the like in a vapor compression refrigeration system.
Research shows that under the condition of the same pressure drop, the temperature drop in the supersonic cyclone separator 2 is larger than that of the traditional throttling devices such as a throttling valve, an expansion machine and a vortex tube, and the supersonic cyclone separator has a better refrigeration effect. In addition, the supersonic cyclone 2 has advantages that the throttle valve, the expander, the vortex tube and the like do not have, namely the pressure can be boosted through the diffuser 24, and the pressure loss of the gas is greatly reduced.
Further, the thermoacoustic effect refers to a time-averaged energy effect generated by the acoustic oscillation of a compressible fluid and a solid medium due to thermal interaction, and can be divided into two types according to the difference of energy conversion directions: firstly, the heat energy is used for generating sound waves, namely, the thermoacoustic effect (thermoacoustic positive effect); the second is to use sound energy to produce refrigeration effect, i.e. sound refrigeration effect (thermo-acoustic reverse effect). The thermoacoustic heat engine is a thermal-power conversion device which converts thermal energy into mechanical energy in the form of acoustic waves by utilizing thermoacoustic effect. Thermoacoustic heat engines are mainly divided into thermoacoustic engines (thermoacoustic compressors) and thermoacoustic refrigerators, which operate on the basis of thermoacoustic effects of thermoacoustic and acoustic refrigeration, respectively.
The thermoacoustic compressor is a device which constructs a proper sound field by using a pipe fitting and a heat exchanger and converts external heat energy into sound energy through the interaction between a working medium and a heat regenerator. For thermoacoustic compressors, if the hot-end temperature exceeds a certain threshold (typically between 100-600 ℃) due to the heat input from an external high-temperature heat source, the system will spontaneously generate periodic pressure fluctuations, i.e., utilize the heat to generate high intensity sound waves without the aid of any mechanical moving parts. The thermoacoustic technology becomes a novel energy conversion technology which is environment-friendly, reliable and has application prospect due to unique advantages.
The supersonic refrigeration system driven by the thermoacoustic compressor provided by the embodiment adopts the thermoacoustic compressor to replace the traditional compressor, firstly, the thermoacoustic compressor is used as an external combustion type heat engine, can be driven by low-grade energy or solar energy and the like, and is favorable for improving the energy utilization rate (energy saving); secondly, helium, nitrogen and other environment-friendly gas working media (environment-friendly) can be adopted; in addition, the thermoacoustic compressor generally comprises a hollow pipe section, a porous medium and a heat exchanger, does not have a mechanical moving part, has the advantages of low vibration, high reliability, long service life and the like (reliability), and solves the problem that the mechanical moving part of the existing compressor is easy to wear and damage.
In addition to the above embodiments, and with further reference to FIG. 3, the supersonic cyclonic separator 2 has a liquid outlet connected to the inlet of the evaporator 3, and the outlet of the evaporator 3 is connected to the inlet of the diffuser 24 by a return line. The supersonic cyclone separator 2 has a gas-liquid separation function. A liquid outlet is provided before the diffuser 24 for the outflow of cryogenic liquid. The temperature of the refrigeration working medium introduced into the supersonic cyclone separator 2 is further reduced, and the refrigeration working medium liquid generated after the temperature is reduced and liquefied is collected from the liquid outlet and flows out; the refrigerant gas which is not liquefied directly flows into the diffuser 24, and joins with the refrigerant which flows back from the evaporator 3 to diffuse.
On the basis of the above embodiment, referring to fig. 3, the supersonic cyclone 2 further includes a cyclone device 21, a Laval nozzle expander 22 and a cyclone gas-liquid separator 23 connected in sequence, the cyclone gas-liquid separator 23 is provided with a liquid collecting device 26, the liquid collecting device 26 is provided with a liquid outlet, a gas outlet of the cyclone gas-liquid separator 23 is connected to an inlet of a diffuser 24, and an outlet of the diffuser 24 is connected to a guide vane 25.
Based on the above embodiment, further, the Laval nozzle expander 22 comprises a stabilizing section 221, a subsonic constriction 222, a throat 223 and a supersonic expansion section 224 connected in sequence, wherein the stabilizing section 221 is connected to the outlet of the swirling device 21.
Referring to fig. 3, the supersonic cyclone 2 is generally composed of 4 parts such as a cyclone device 21, a Laval nozzle expander 22, a cyclone gas-liquid separator 23, and a diffuser 24. Both gas expansion refrigeration and liquefaction processes occur primarily within the Laval nozzle expander 22. The Laval nozzle expander 22 may be divided into 4 sections, a stationary section 221, a subsonic convergent section 222, a throat 223 and a supersonic divergent section 224. The working principle is as follows: the gas enters the cyclone device 21 to rotate and has certain acceleration; the gas is expanded to supersonic speed in a Laval nozzle expander 22 to form a low-temperature and low-pressure environment (the temperature is reduced because part of the heat of the gas is converted into kinetic energy), and part of the gas is condensed and liquefied to form gas-liquid two-phase flow; liquid drops are thrown to the pipe wall under the action of tangential speed generated by rotation and strong cyclone field centrifugal force, discharged from a special liquid outlet in the cyclone gas-liquid separator 23, and gas is discharged through a diffuser 24, so that gas-liquid separation is realized; after the speed reduction, the pressure increase and the temperature rise of the diffuser 24, most of the pressure loss of the gas through the supersonic cyclone separator 2 can be recovered, and the pressure loss of the gas is greatly reduced.
On the basis of the above embodiment, furthermore, a return check valve 27 is provided on the return line. Used for controlling the unidirectional flow of the refrigeration working medium.
On the basis of the above embodiment, further, with reference to fig. 1 and 2, when the refrigeration system comprises a refrigeration unit, the outlet of the thermoacoustic compressor is connected to the inlet of the supersonic cyclone 2, and the outlet of the supersonic cyclone 2 is connected to the inlet of the compressor; forming a circulation loop. In the circulation loop, a refrigeration working medium is compressed by a thermoacoustic compressor to form a high-pressure state, then enters the supersonic cyclone separator 2 to be cooled, the low-temperature working medium obtained by the supersonic cyclone separator 2 is introduced into the evaporator 3 to be evaporated and absorb heat, then is introduced into the diffuser 24, is subjected to certain pressurization and temperature rise by the diffuser 24, and then flows back to the thermoacoustic compressor again.
On the basis of the above-described embodiment, further, the thermoacoustic compressor includes a standing-wave type thermoacoustic compressor 11 or a traveling-wave type thermoacoustic compressor 12.
Specifically, referring to fig. 1, the thermoacoustic compressor includes a thermal chamber 111, a heater 112, a heat regenerator 113, a room temperature heat exchanger 114, and a resonance tube 115, which are connected in sequence; the thermo-acoustic compressor in this embodiment is a standing wave type thermo-acoustic compressor 11. The outlet and inlet of the standing wave type thermo-acoustic compressor 11 are both arranged on the resonance tube 115. The outlet and inlet should be placed at locations where pressure fluctuations are large and may be close. A high-pressure one-way valve 4 is arranged between the thermoacoustic compressor and the supersonic cyclone separator 2; the inlet pipeline of the thermoacoustic compressor is provided with a low-pressure one-way valve 5. The high-pressure one-way valve and the low-pressure one-way valve are close to the thermoacoustic engine as much as possible; the valve is arranged at the position where the pressure fluctuation of the thermoacoustic system is large, so that a large pressure ratio can be obtained.
Further, referring to fig. 2 and 4, the present embodiment provides a traveling-wave type thermoacoustic compressor 12. The traveling-wave type thermoacoustic compressor 12 includes, in series, a room temperature heat exchanger 122, a regenerator 123, a heater 124, a thermal buffer tube 125, a secondary heat exchanger 126, and a resonator tube 128. In addition, the resonance tube 128 may be connected to one end of the feedback tube 121, and the other end of the feedback tube 121 is connected to the room temperature heat exchanger 122. Referring to fig. 2, the outlet and inlet of traveling-wave type thermoacoustic compressor 12 are disposed on resonating tube 128. The outlet and inlet should be placed at locations where pressure fluctuations are large and may be close. A high-pressure one-way valve 4 is arranged between the thermoacoustic compressor and the supersonic cyclone separator 2; a low-pressure one-way valve 5 is arranged on an inlet pipeline of the thermoacoustic compressor. The high-pressure one-way valve and the low-pressure one-way valve are close to the thermoacoustic engine as much as possible; the valve is arranged at the position where the pressure fluctuation of the thermoacoustic system is large, so that a large pressure ratio can be obtained. A resilient membrane 127 may also be disposed within the traveling-wave thermo-acoustic compressor 12.
On the basis of the above embodiment, further referring to fig. 4 and 5, when the refrigeration system includes a plurality of refrigeration units, the thermo-acoustic compressors of the plurality of refrigeration units are connected end to end in sequence to form a circulation loop. That is, the outlet of the thermoacoustic compressor in one refrigeration unit is connected with the inlet of the thermoacoustic compressor in the other refrigeration unit, and finally a circulation loop is formed. Can realize multi-stage refrigeration and can fully utilize the compression work provided by the compressor.
On the basis of the above embodiment, further, referring to fig. 4, a plurality of refrigeration units are provided with a plurality of evaporators in one-to-one correspondence; namely, each refrigerating unit is correspondingly provided with an evaporator, and the supersonic cyclone separator in each refrigerating unit is connected with an evaporator. The plurality of refrigeration units have a plurality of evaporators. Or referring to fig. 5, a plurality of refrigeration units are each connected to one evaporator. Namely, a plurality of supersonic cyclone separators in a plurality of refrigeration units are all connected with one evaporator, so that higher refrigeration capacity can be obtained.
On the basis of the above embodiment, further, a high-pressure one-way valve 4 is arranged between the thermoacoustic compressor and the supersonic cyclone separator 2; a low-pressure one-way valve 5 is arranged on an inlet pipeline of the thermoacoustic compressor. The smooth flow of the refrigeration working medium in the loop can be controlled. The high pressure check valve 4 and the low pressure check valve 5 are relatively speaking, and the pressure of the working medium flowing through the high pressure check valve 4 is higher than the pressure of the working medium flowing through the low pressure check valve 5.
On the basis of the above embodiment, further, the refrigerant of the refrigeration system includes CO 2 、He、N 2 Ne, ar and H 2 At least two of O; and the liquefaction temperatures of different types of refrigeration working media are different. The refrigeration working medium is environment-friendly, and can obtain a better refrigeration effect through phase change. Preferably, the difference of the liquefaction temperatures of different types of refrigeration working media is greater than or equal to a preset difference. I.e. different kinds of refrigerant with large difference in liquefaction temperature, e.g. one refrigerant may be easily liquefied such as CO 2 Or H 2 O, another working substance not easily liquefied, e.g. He or N 2 Or Ar.
Further, the refrigerant in the refrigeration system described in each of the above embodiments may also be other gases, so as to achieve the purpose of obtaining a better refrigeration effect through phase change by liquefaction, and is not particularly limited. Preferably, the refrigerant in the refrigeration system is a mixture of at least two gases having different liquefaction temperatures. During multi-stage refrigeration, each component of the mixed gas can be sequentially liquefied according to different liquefaction temperatures, so that multi-stage refrigeration effect is achieved. Preferably, the refrigerant in the refrigeration system may be CO 2 And N 2 The mixed gas of (1).
Furthermore, different refrigeration temperature regions can be realized by adopting different refrigeration working medium combinations. Different combinations of refrigerant media can be used to achieve a wide range of refrigeration from the refrigeration temperature region to the low temperature region.
Based on the above embodiments, in particular, fig. 1 provides a supersonic refrigeration system driven by a standing wave thermoacoustic compressor and a realization method thereof. The system mainly comprises a standing wave type thermoacoustic compressor 11, a supersonic cyclone separator 2, an evaporator 3, a high-pressure one-way valve 4 and a low-pressure one-way valve 5. The standing wave type thermoacoustic compressor 11 is composed of a thermal cavity 111, a heater 112, a heat regenerator 113, a room temperature heat exchanger 114 and a resonant tube 115. Unlike conventional refrigerants in vapor compression refrigeration systems, systems employ CO 2 And N 2 (N 2 Can be replaced by Ar or He) as a recycling toolThe refrigeration is carried out, and the environment is protected.
When the system is in operation, heat is input to the system by the heater 112, the heat source may be solar energy or low-grade energy such as industrial waste heat, etc., and the room temperature heat exchanger 114 transfers the excess heat to the outside. When the axial temperature gradient formed by the temperature difference of the two sides of the regenerator 113 (the regenerator is a conventional regenerator with a porous structure, such as a wire mesh structure, a silk floss structure or a stainless steel ball) reaches a certain value, the system can self-oscillate, and the components of the standing wave type thermoacoustic compressor 11, which are composed of the room temperature heat exchanger 114, the regenerator 113 and the heater 112, can convert the heat into mechanical energy in the form of acoustic energy in the regenerator 113, thereby realizing the thermal-energy conversion process. The acoustic work produced by the thermoacoustic compressor is transferred via the resonance tube 115 through the high-pressure one-way valve 4 into the supersonic cyclonic separator 2. The resonance tube 115 is used for enabling the supersonic cyclone separator 2 to be in an environmental temperature region, and simultaneously, the supersonic cyclone separator can play a certain phase modulation role.
CO 2 And N 2 The gas mixture enters a supersonic cyclone separator 2, firstly passes through a cyclone device 21 to form a cyclone flow state, then enters a Laval nozzle expander 22, sequentially passes through a stable section 221, a subsonic contraction section 222, a throat 223 and a supersonic expansion section 224, and then CO is separated from the gas mixture 2 And N 2 The gas mixture expands sharply to supersonic speed in the Laval nozzle expander 22, producing a refrigeration effect, creating a low temperature and low pressure environment (the temperature is reduced due to the conversion of part of the gas heat into kinetic energy), CO 2 The gas is condensed and liquefied, and CO is generated under the action of tangential speed generated by rotation and the centrifugal force of a strong cyclone field 2 The droplets are thrown to the tube wall, discharged by a special liquid collecting device 26 in the cyclone gas-liquid separator 23, and enter the evaporator 3 where they evaporate (boil) into CO in the evaporator 3 2 Vapour, absorbing heat from the environment or the substance to be cooled, lowering the temperature of the environment or the substance to be cooled, CO 2 The vapor exits the evaporator 3 through the gas return check valve 27 in the diffuser 24 with uncondensed N 2 The gas is mixed, flows out of the supersonic cyclone separator 2 stably through the guide vanes 25 and reenters the standing wave type through the low-pressure one-way valve 5The thermoacoustic compressor 11 has a low pressure port to form a closed refrigeration cycle.
After the speed reduction, the pressure increase and the temperature rise of the diffuser 24, most of the pressure loss of the mixed gas through the supersonic cyclone separator 2 can be recovered, and the pressure loss of the mixed gas is greatly reduced. The system employs CO 2 And N 2 The (Ar/He) mixed gas is used as a circulating working medium for refrigeration, and compared with the traditional refrigerant in a vapor compression refrigeration system, the (Ar/He) mixed gas is more environment-friendly and environment-friendly; the refrigeration working medium is driven to circulate in the closed system by the thermo-acoustic compressor based on the thermo-acoustic effect, and the system has the advantages of no mechanical moving part, high reliability, long service life and full utilization of solar energy or low-grade energy; the supersonic cyclone separator based on supersonic refrigeration effect is used as an expansion cooling element, and has the advantages of high efficiency, small pressure drop, large temperature drop, low energy consumption, good stability (the supersonic cyclone separator has no rotating part), long-term reliability and the like. It is emphasized that He and N may also be used in the present system 2 Mixed gas (wherein N 2 Can also be replaced by Ne, ar and CO 2 Or H 2 O) is used as a circulating working medium to realize low-temperature refrigeration.
Based on the above embodiments, fig. 2 further provides a supersonic refrigeration system driven by a traveling wave thermoacoustic compressor and a realization method thereof. Unlike the embodiment described in fig. 1, the traveling-wave type thermo-acoustic compressor 12 is used to drive the circulating fluid to refrigerate in the closed system, and the efficiency of the acoustic power generated by the traveling-wave type thermo-acoustic compressor is higher. When the system is in operation, heat is input to the system by the heater 124, and the room temperature heat exchanger 122 transfers the excess heat to the outside. When the axial temperature gradient formed by the temperature difference of the two sides of the regenerator 123 (the regenerator is a regenerator with a conventional porous structure, such as a wire mesh structure, a silk floss structure or a stainless steel ball) reaches a certain value, the system can oscillate by self-excitation, and the traveling wave type thermoacoustic compressor 12 sub-component composed of the room temperature heat exchanger 122, the regenerator 123 and the heater 124 can convert the heat into mechanical energy in the form of acoustic energy in the regenerator 123, thereby realizing the thermal-power conversion process.
A portion of the acoustic work produced by the traveling wave-type thermoacoustic compressor 12 is thermally bufferedThe pipe 125, the secondary heat exchanger 126, the resonance pipe 128 and the high pressure check valve 4 are transferred into the supersonic cyclone separator 2, and the other part returns to the room temperature heat exchanger 122 along the feedback pipe 121 to be amplified again and again. The elastic membrane 127 in the feedback tube 121 acts to cancel the loop dc current. CO 2 2 And N 2 The (Ar/He) gas mixture enters a supersonic cyclone separator 2, firstly passes through a cyclone device 21 to form a cyclone flow state, then enters a Laval nozzle expander 22, sequentially passes through a stable section 221, a subsonic contraction section 222, a throat 223 and a supersonic expansion section 224, and then is subjected to CO separation 2 And N 2 The (Ar/He) gas mixture expands sharply to supersonic velocity in Laval nozzle expander 22, producing a refrigeration effect, creating a low temperature and low pressure environment (the temperature is reduced due to the conversion of part of the gas' heat into kinetic energy), CO 2 The gas is condensed and liquefied, and CO is generated under the action of tangential speed generated by rotation and the centrifugal force of a strong cyclone field 2 The droplets are thrown to the tube wall, discharged by a special liquid collecting device 26 in the cyclone gas-liquid separator 23, and enter the evaporator 3 where they evaporate (boil) into CO in the evaporator 3 2 Vapour, absorbing heat from the environment or the substance to be cooled, lowering the temperature of the environment or the substance to be cooled, CO 2 The vapor exits the evaporator 3 through the gas return check valve 27 in the diffuser 24 with uncondensed N 2 The (Ar/He) gas is mixed, flows out of the supersonic cyclone separator 2 stably through the guide vanes 25, flows through the low-pressure one-way valve 5, and reenters the low-pressure port of the traveling-wave type thermoacoustic compressor 12, so that a closed refrigeration cycle is formed.
After the speed reduction, the pressure increase and the temperature rise of the diffuser 24, most of the pressure energy lost by the mixed gas through the supersonic cyclone separator 2 is recovered, and the pressure loss of the mixed gas is greatly reduced. The system employs CO 2 And N 2 The (Ar/He) mixed gas is used as a circulating working medium for refrigeration, and is more environment-friendly compared with a traditional refrigerant in a vapor compression refrigeration system; the heat sound compressor based on heat sound effect is adopted to drive the refrigeration working medium to circulate in the closed system, and the refrigeration system has the advantages of no mechanical moving part, high reliability, long service life and full utilization of solar energy or low-grade energyThe traveling wave type thermoacoustic compressor performs loop amplification on acoustic power, and has higher thermal power conversion efficiency; the supersonic cyclone separator based on supersonic refrigeration effect is used as an expansion cooling element, and has the advantages of high efficiency, small pressure drop, large temperature drop, low energy consumption, good stability (the supersonic cyclone separator has no rotating part), long-term reliability and the like. It is emphasized that He and N may also be used in the present system 2 Mixed gas (wherein N is 2 Can also be replaced by Ne, ar and CO 2 Or H 2 O) is used as a circulating working medium to realize low-temperature refrigeration.
Based on the above embodiments, further, fig. 4 provides a supersonic refrigeration system driven by a loop multistage thermoacoustic compressor and a realization method thereof. Unlike the previous embodiment, this embodiment employs a loop multistage structure, specifically including three refrigeration units. The sound power generated by the thermoacoustic compressor in the refrigeration unit 1# drives the circulating working medium to refrigerate in a closed system, and the CO is low-temperature and low-pressure 2 And N 2 And (4) stably discharging the (Ar/He) mixed gas from the supersonic cyclone separator, allowing the (Ar/He) mixed gas to enter a next-stage thermoacoustic compressor and the supersonic cyclone separator, namely entering a refrigerating unit 2#, and then entering a refrigerating unit 3#, wherein the steps are sequentially carried out to form a closed cycle. In the loop refrigerating system, the sound power generated by the thermoacoustic compressor is utilized in multiple stages, so that the heat power conversion efficiency is improved; in addition, through multi-stage refrigeration, lower refrigeration temperature can be obtained. It is emphasized that the number of thermo-acoustic compressors and supersonic cyclones in the structure is 2 or more, the specific number is determined by the power and the use conditions of the thermo-acoustic compressors, and the specific arrangement is determined by the working environment.
Based on the above embodiments, further, fig. 5 provides another supersonic refrigeration system driven by a loop multistage thermoacoustic compressor and a realization method thereof. Different from the embodiment shown in fig. 4, in order to make the structure more compact and improve the utilization rate of the evaporator so as to obtain more refrigerating capacity, a structure that a plurality of supersonic cyclone separators share one evaporator is adopted, and other working processes are consistent with the embodiment shown in fig. 4. It should be emphasized that this embodiment illustrates a simple configuration, the number of evaporators is determined by the power of the thermoacoustic engine, and the connection between the evaporators and the supersonic cyclone separator is determined by the specific operating conditions and operating environment.
The thermoacoustic compressor is composed of a thermoacoustic engine in the forms of standing wave type, traveling wave type or loop multistage and the like, and a high-pressure and low-pressure one-way valve is arranged at a proper thermoacoustic position (a large pressure ratio position) to generate stable high-pressure flow and low-pressure flow. The invention adopts the thermoacoustic compressor based on thermoacoustic effect to drive the refrigeration working medium to circulate in the closed system, and has the advantages of no mechanical moving part, high reliability, long service life and full utilization of solar energy or low-grade energy; the stationary-wave type and traveling-wave type thermoacoustic compressors and the loop multistage structure are adopted, the function of the compressor in the traditional vapor compression type refrigerating system is achieved, and solar energy or low-grade energy sources such as industrial waste heat and waste heat can be fully utilized for refrigeration.
The supersonic refrigeration system driven by the thermoacoustic compressor provided by the above embodiments is mainly used for removing impurities such as water vapor and heavy hydrocarbon in natural gas based on the existing supersonic cyclone separator 3, and does not select a proper working medium to construct a closed supersonic refrigeration cycle suitable for the ordinary Leng Wenou (refrigeration temperature region of refrigerator and air conditioner). The present invention uses environmentally friendly CO 2 And N 2 When the mixed gas is used as a working medium for refrigeration, closed refrigeration cycle can be realized, the problem that the traditional refrigerant in the vapor compression refrigeration system is harmful to the environment is solved, and the refrigerant is more environment-friendly than the traditional refrigerant in the vapor compression refrigeration system; the heat sound compressor based on the heat sound effect is adopted to drive the refrigeration working medium to circulate in the closed system, has the advantages of no mechanical moving part, high reliability, long service life and full utilization of solar energy or low-grade energy, and solves the problem that the mechanical moving part is easy to wear and damage in the traditional compressor; meanwhile, the supersonic cyclone separator 3 is arranged as an expansion cooling element, so that the device has the advantages of high efficiency, small pressure drop, large temperature drop, low energy consumption, good stability (the supersonic cyclone separator does not have a rotating part), long-term reliability and the like, and solves the problems of low efficiency, large pressure drop, high energy consumption and the like of the traditional throttling device in the steam compression refrigeration system; can also be passed throughDifferent refrigerating working medium combinations are adopted to realize wide-range refrigeration from a refrigeration temperature area to a low-temperature area.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The supersonic refrigeration system driven by the thermoacoustic compressor is characterized by comprising at least one refrigeration unit, wherein the refrigeration unit comprises a thermoacoustic compressor and a supersonic cyclone separator which are connected, the refrigeration unit further comprises an evaporator, a diffuser is arranged at the tail end of the supersonic cyclone separator, and the evaporator is serially connected at the inlet of the diffuser of the supersonic cyclone separator;
the supersonic cyclone separator is provided with a liquid outlet, the liquid outlet is connected with the inlet of the evaporator, and the outlet of the evaporator is connected with the inlet of the diffuser through a return pipeline;
a high-pressure one-way valve is arranged between the thermoacoustic compressor and the supersonic cyclone separator; and a low-pressure one-way valve is arranged on an inlet pipeline of the thermoacoustic compressor.
2. The supersonic refrigeration system driven by a thermoacoustic compressor according to claim 1, wherein a return check valve is provided on said return line.
3. A thermoacoustic compressor driven supersonic refrigeration system according to claim 1 or 2, wherein when refrigeration system comprises one said refrigeration unit, the outlet of said thermoacoustic compressor is connected to the inlet of said supersonic cyclone separator, and the outlet of said supersonic cyclone separator is connected to the inlet of said thermoacoustic compressor.
4. A supersonic refrigeration system driven by a thermoacoustic compressor according to claim 1 or 2, wherein when the refrigeration system comprises a plurality of refrigeration units, said plurality of refrigeration units are connected end to end in sequence to form a circulation loop.
5. The supersonic refrigeration system driven by a thermoacoustic compressor according to claim 4, wherein a plurality of said refrigeration units have a plurality of evaporators in a one-to-one correspondence; or a plurality of the refrigeration units are all connected to one evaporator.
6. A supersonic refrigeration system driven by a thermoacoustic compressor according to claim 1 or 2, wherein said thermoacoustic compressor comprises a standing wave type thermoacoustic compressor or a traveling wave type thermoacoustic compressor.
7. A supersonic refrigeration system driven by a thermoacoustic compressor according to claim 1 or 2, wherein the refrigeration medium of the refrigeration system comprises CO 2 、He、N 2 Ne, ar and H 2 At least two of O; and the liquefaction temperatures of different types of refrigeration working media are different.
8. The supersonic refrigeration system driven by a thermoacoustic compressor according to claim 1, wherein the supersonic cyclone separator further comprises a cyclone device, a Laval nozzle expander and a cyclone gas-liquid separator connected in sequence, the cyclone gas-liquid separator is provided with a liquid collecting device, the liquid collecting device is provided with the liquid outlet, the gas outlet of the cyclone gas-liquid separator is connected to the inlet of the diffuser, and the outlet of the diffuser is connected with guide vanes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010898663.5A CN113701385B (en) | 2020-08-31 | 2020-08-31 | Supersonic refrigeration system driven by thermoacoustic compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010898663.5A CN113701385B (en) | 2020-08-31 | 2020-08-31 | Supersonic refrigeration system driven by thermoacoustic compressor |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113701385A CN113701385A (en) | 2021-11-26 |
CN113701385B true CN113701385B (en) | 2022-10-28 |
Family
ID=78646611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010898663.5A Active CN113701385B (en) | 2020-08-31 | 2020-08-31 | Supersonic refrigeration system driven by thermoacoustic compressor |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113701385B (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100212311A1 (en) * | 2009-02-20 | 2010-08-26 | e Nova, Inc. | Thermoacoustic driven compressor |
CN102268309A (en) * | 2011-07-18 | 2011-12-07 | 中国石油大学(北京) | Full liquefaction process for natural gas by using supersonic speed cyclone separator |
CN102374688A (en) * | 2011-09-06 | 2012-03-14 | 浙江大学 | Refrigeration system driven by thermoacoustic compressor |
CN103808063A (en) * | 2014-02-14 | 2014-05-21 | 中国科学院理化技术研究所 | Acoustic resonance type thermal driving traveling wave thermoacoustic refrigeration system |
CN110118450A (en) * | 2019-05-23 | 2019-08-13 | 江苏热声机电科技有限公司 | A kind of hot sound refrigerating machine |
-
2020
- 2020-08-31 CN CN202010898663.5A patent/CN113701385B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100212311A1 (en) * | 2009-02-20 | 2010-08-26 | e Nova, Inc. | Thermoacoustic driven compressor |
CN102268309A (en) * | 2011-07-18 | 2011-12-07 | 中国石油大学(北京) | Full liquefaction process for natural gas by using supersonic speed cyclone separator |
CN102374688A (en) * | 2011-09-06 | 2012-03-14 | 浙江大学 | Refrigeration system driven by thermoacoustic compressor |
CN103808063A (en) * | 2014-02-14 | 2014-05-21 | 中国科学院理化技术研究所 | Acoustic resonance type thermal driving traveling wave thermoacoustic refrigeration system |
CN110118450A (en) * | 2019-05-23 | 2019-08-13 | 江苏热声机电科技有限公司 | A kind of hot sound refrigerating machine |
Also Published As
Publication number | Publication date |
---|---|
CN113701385A (en) | 2021-11-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2012533046A (en) | Jet pump system, apparatus, arrangement, and method of use for heat and cold management | |
CN102506512A (en) | Refrigerating system with ejector and refrigerating method thereof | |
CN103775148A (en) | Self-cooled thermal power acting method | |
JP2004116938A5 (en) | ||
CN108895694B (en) | Improved self-cascade refrigeration cycle system and control method thereof | |
Sun | Evaluation of a combined ejector–vapour‐compression refrigeration system | |
Yang et al. | Energy and exergy analysis of a cooling/power cogeneration ejector refrigeration system | |
JP2004101141A (en) | Vapor compression type refrigerator | |
CN210089175U (en) | Jet type transcritical carbon dioxide two-stage compression refrigeration system | |
CN110701823B (en) | Electric card refrigerating system driven by thermoacoustic and pyroelectric coupling | |
CN113701385B (en) | Supersonic refrigeration system driven by thermoacoustic compressor | |
JP2018514747A (en) | Phase change wave rotor automatic cascade refrigeration system and operation method thereof | |
JPH0926226A (en) | Refrigeration apparatus | |
CN113701383B (en) | Multistage supersonic speed low-temperature refrigeration system driven by thermoacoustic compressor | |
US4019343A (en) | Refrigeration system using enthalpy converting liquid turbines | |
CN116558145A (en) | Refrigerating system adopting double ejectors | |
JP4016711B2 (en) | Vapor compression refrigerator | |
CN113701382B (en) | Mechanical compression type driven multistage supersonic speed low-temperature refrigeration system | |
KR100461995B1 (en) | Gas heat pump driven by refrigerant steam turbine | |
Hays et al. | A transcritical CO2 turbine-compressor | |
Abdellaoui et al. | Thermodynamic analysis of a new dual evaporator CO 2 transcritical refrigeration cycle | |
CN113701384B (en) | Novel compression refrigerating system based on supersonic speed refrigerating effect | |
Kumar et al. | A review of various kinds of cascade refrigeration cycle and application of ejector mechanism | |
CN113758039B (en) | Natural working medium CO2Compression-supersonic speed two-phase expansion composite refrigerating system and refrigerator | |
Chi et al. | Performance Study of a Novel Ejector-Cascade Refrigeration System with Regenerator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |