CN117722248A - Vortex generator and supercritical carbon dioxide energy conversion system - Google Patents
Vortex generator and supercritical carbon dioxide energy conversion system Download PDFInfo
- Publication number
- CN117722248A CN117722248A CN202311826965.1A CN202311826965A CN117722248A CN 117722248 A CN117722248 A CN 117722248A CN 202311826965 A CN202311826965 A CN 202311826965A CN 117722248 A CN117722248 A CN 117722248A
- Authority
- CN
- China
- Prior art keywords
- vortex
- fluid outlet
- tube
- compressed air
- vortex generator
- 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.)
- Pending
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 45
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 35
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 35
- 239000012530 fluid Substances 0.000 claims abstract description 214
- 238000004146 energy storage Methods 0.000 claims abstract description 26
- 230000000903 blocking effect Effects 0.000 claims description 43
- 238000007789 sealing Methods 0.000 claims description 25
- 230000007423 decrease Effects 0.000 claims description 7
- 238000010992 reflux Methods 0.000 claims description 5
- 238000005381 potential energy Methods 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000329 molecular dynamics simulation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Jet Pumps And Other Pumps (AREA)
Abstract
The application discloses vortex generator and supercritical carbon dioxide energy conversion system, this vortex generator include barrel, two head and a plurality of vortex tube, and the barrel has high temperature fluid export and low temperature fluid export at its length direction's two tip, and has fluid inlet on the lateral wall of barrel. By storing compressed air in a system and vortex generatorAnd a second regenerator is coupled to the whole energy conversion system, compressed air in the compressed air energy storage system flows through the vortex generator, and pressure potential energy of the compressed air is converted into high-temperature energy and low-temperature energy which are respectively used for sCO 2 Preheating and precooling of energy conversion system, and is helpful for improving system sCO 2 Hot end temperature of working medium, system sCO reduction 2 The cold end temperature of the working medium is used for realizing the efficient utilization of the energy of the compressed air and improving sCO 2 Efficiency of the energy conversion system.
Description
Technical Field
The application relates to the technical field of heat exchange, in particular to a vortex generator and a supercritical carbon dioxide energy conversion system.
Background
Supercritical carbon dioxide (Supercritical Carbon Dioxide, abbreviated as sCO) 2 ) The energy conversion system combines carbon dioxide with Brayton cycle system, and adopts CO in supercritical state 2 And converting energy for the working medium.
In the prior art, for supercritical carbon dioxide sCO 2 More energy is consumed for heating and cooling, and the energy conversion efficiency of the whole system is low.
Disclosure of Invention
The main object of the present application is to provide a vortex generator and supercritical carbon dioxide energy conversion system for solving the problem of sCO in the prior art 2 The heating and cooling needs to consume more energy, and the energy conversion efficiency of the whole system is low.
In order to achieve the above object, the present application provides a vortex generator and a supercritical carbon dioxide energy conversion system.
A vortex generator comprising: the device comprises a barrel, two sealing heads and a plurality of vortex tubes, wherein the barrel is provided with a high-temperature fluid outlet and a low-temperature fluid outlet at two ends in the length direction, and a fluid inlet is formed in the side wall of the barrel; the two end sockets are respectively fixed at two ends of the cylinder, the end sockets are in sealing connection with the cylinder, a fluid outlet is arranged on the end sockets, one fluid outlet is a low-temperature fluid outlet, and the other fluid outlet is a high-temperature fluid outlet; the vortex tubes are arranged in the cylinder in parallel, two ends of each vortex tube extend to two ends of the cylinder along the length direction of the cylinder, and the vortex tubes are arranged in a hollow mode and are provided with first through holes at positions corresponding to the fluid inlets.
Optionally, the vortex generator further comprises a first tube plate, a first spoiler, a second spoiler and a second tube plate which are sequentially arranged in the barrel along the length direction of the barrel; the first tube plate and the second tube plate are positioned at two ends of the cylinder body; the first flow blocking plate, the second flow blocking plate and the inner cavity of the cylinder body enclose a medium flow area, and the first through hole is positioned in the medium flow area; the vortex tube penetrates through each second through hole.
Optionally, the first tube plate is located at a side of the low-temperature fluid outlet, the second tube plate is located at a side of the high-temperature fluid outlet, and the first spoiler is located at a side of the second spoiler away from the second tube plate; one end of the vortex tube facing the low-temperature fluid outlet is a cold fluid outlet end, and one end facing the high-temperature fluid outlet is a hot fluid outlet end; the vortex tube comprises a first fluid blocking body, the first fluid blocking body is positioned between the first through hole and the cold fluid outlet end, the outer wall of the first fluid blocking body is in sealing connection with the inner wall of the vortex tube, a fluid channel is arranged in the middle of the first fluid blocking body, and the extending direction of the fluid channel is the same as the length direction of the vortex tube; the second fluid blocking body is positioned between the first through hole and the hot fluid outlet end, a sealing structure is formed by the second fluid blocking body in a surrounding mode in the pipe diameter direction of the vortex pipe, and a gap for fluid to pass through is formed between the edge of the sealing structure and the inner wall of the vortex pipe.
Optionally, the first choke body is annular, the first choke body of the annular structure has an inner diameter and an outer diameter, and the ratio of the inner diameter to the outer diameter is 1/3-2/3.
Optionally, the second choke body is conical, the axial direction of the second choke body is the same as the length direction of the vortex tube, and the end surface area of the second choke body with a conical structure is gradually reduced from the hot fluid outlet end to the cold fluid outlet end; the ratio of the gap value of the gap along the pipe diameter direction of the vortex pipe to the inner diameter of the vortex pipe is 1/10-3/10.
Optionally, the inner cavity of the vortex tube gradually increases from the first choke to the cryogenic fluid outlet end.
Optionally, an expansion joint for generating deformation under the fluid pressure of the inner cavity of the vortex tube is arranged on the tube wall of the vortex tube, and the expansion joint is positioned between the first through hole and the second flow blocking body.
Optionally, the expansion joint is a bellows expansion joint.
Optionally, the vortex tube is provided with a plurality of first through holes, and at least part of the first through holes are circumferentially arranged in the radial direction of the vortex tube.
Optionally, the first through hole is formed along a tangential direction of the wall of the vortex tube.
In addition, in order to achieve the above object, the present application further provides a supercritical carbon dioxide energy conversion system, including a compressed air energy storage system, a second regenerator and a supercritical carbon dioxide energy conversion subsystem, the compressed air energy storage system is used for storing compressed air; the second heat regenerator is connected in series in the supercritical carbon dioxide energy conversion subsystem; the fluid inlet of the vortex generator is connected with the output end of the compressed air energy storage system, the high-temperature fluid outlet of the vortex generator is connected with the second input end of the second heat regenerator, and the vortex generator is used for preheating cold fluid flowing through the second heat regenerator; the low-temperature fluid outlet of the vortex generator is connected with the second output end of the second heat regenerator, the output end of the first pipeline is connected with the input end of the compressed air energy storage system, and the first pipeline is used for precooling a reflux medium of the supercritical carbon dioxide energy conversion system subsystem.
Optionally, the compressed air energy storage system comprises an air compressor, an air cooler and a compressed air energy storage tank, and the input end of the air compressor is connected with the output end of the first pipeline; the input end of the air cooler is connected with the output end of the air compressor, and the output end of the air cooler is connected with the input end of the check valve; the input end of the compressed air storage tank is connected with the output end of the check valve; the output end of the compressed air storage tank is connected with the fluid inlet of the vortex generator; wherein, be provided with first valve between compressed air storage tank's the output and the fluid inlet, be provided with the second valve between the output of first pipeline and the input of air compressor.
Optionally, the first pipeline has a bending portion, and the bending portion is wound on a flow pipeline of the reflux medium of the supercritical carbon dioxide energy conversion subsystem.
The vortex generator and the supercritical carbon dioxide energy conversion system provided by the application are characterized in that the vortex generator is coupled to the whole energy conversion system, compressed air in the compressed air energy storage system flows through the vortex generator, the pressure potential energy of the compressed air is converted into high-temperature fluid and low-temperature fluid which are respectively used for sCO 2 Preheating and precooling of energy conversion system, and is helpful for improving system sCO 2 Hot end temperature of working medium, system sCO reduction 2 The cold end temperature of the working medium is used for realizing the efficient utilization of the energy of the compressed air and improving sCO 2 Efficiency of the energy conversion system. The vortex generator is used as a heat/cold generating device to enable the system to realize a heating or cooling function, wherein air is used as a heating/cooling medium and is used as a medium sCO at the other side of the heat exchange device 2 Non-contact heat exchange is carried out, thereby realizing sCO 2 And the cycle efficiency of the energy conversion system is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art supercritical carbon dioxide energy conversion subsystem cycle flow;
FIG. 2 is a schematic diagram of a supercritical carbon dioxide energy conversion system cycle flow according to one embodiment of the present application;
FIG. 3 is a schematic perspective view of a vortex generator according to one embodiment of the present application;
FIG. 4 is an exploded view of the vortex generator of FIG. 3;
FIG. 5 is a cross-sectional view of the vortex tube of FIG. 3;
FIG. 6 is a cross-sectional view of the vortex tube of FIG. 5 taken in the direction B-B at the fluid inlet;
FIG. 7 is a schematic perspective view of the tube sheet and the spoiler of FIG. 5.
In the figure: 1. a cylinder; 2. a fluid inlet; 3. a seal head; 4. a fluid outlet; 5. a vortex tube; 61. a first tube sheet; 62. a second tube sheet; 7. a second through hole; 8. a first through hole; 9. a second blocking body; 10. a first fluid-blocking body; 11. an expansion joint; 12. a heat source; 13. a turbine; 14. a generator; 151. a first regenerator; 152. a second regenerator; 16. a cooler; 17. a compressed air storage tank; 18. a vortex generator; 19. a compressor; 201. a first valve; 202. a second valve; 21. a bending part; 221. a first spoiler; 222. a second spoiler; 23. a first pipeline; 24. an air compressor; 25. a check valve; 26. an air cooler; 27. a compressed air energy storage system.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
In the related art, as shown in fig. 1, the supercritical carbon dioxide energy conversion subsystem mainly comprises a heat source 12, a turbine 13, a generator 14, a first regenerator 151, a cooler 16, and a pipeline, wherein a first output end of the first regenerator 151 is connected with an input end of the heat source 12, an output end of the heat source 12 is connected with an input end of the turbine 13, an output end of the turbine 13 is connected with a second input end of the first regenerator 151, a second output end of the first regenerator 151 is connected with an input end of the cooler 16, an output end of the cooler 16 is connected with an input end of the compressor 19, and an output end of the compressor 19 is connected with a first input end of the first regenerator 151.
sCO 2 Compressed by the compressor 19 and passed through the first regenerator 151, and heated by the heat source 12 to become high-temperature and high-pressure sCO 2 sCO at high temperature and high pressure 2 Expansion work is performed in the turbine 13, and the expanded sCO 2 Reduced pressure sCO exiting from turbine 13 2 Enters the cooler 16 for cooling through the first heat regenerator 151, and the cooled sCO 2 Reenter compressor 19 to achieve sCO 2 Is recycled. The system is used for sCO 2 The heating and cooling needs to consume more energy, and the whole systemIs low in energy conversion efficiency. sCO enhancement by heat exchange means 2 Endothermic temperature, decrease sCO 2 Exothermic temperature, hopefully realizing sCO 2 And the system efficiency is improved.
Based on this, exemplary embodiments of the present application provide a vortex generator, as shown in fig. 3 and 4, which may include a cylinder 1, two caps 3, and a plurality of vortex tubes 5, the cylinder 1 having a high temperature fluid outlet and a low temperature fluid outlet at both ends in a length direction X thereof, and a fluid inlet 2 on a sidewall of the cylinder 1; the two sealing heads 3 are respectively fixed at two ends of the cylinder body 1, the sealing heads 3 are in sealing connection with the cylinder body 1, the sealing heads 3 are respectively provided with a fluid outlet 4, one fluid outlet 4 is a low-temperature fluid outlet, and the other fluid outlet 4 is a high-temperature fluid outlet; the vortex tubes 5 are arranged in the cylinder 1 in parallel, two ends of the vortex tubes 5 extend to two ends of the cylinder 1 along the length direction X of the cylinder 1, and the vortex tubes 5 are arranged in a hollow mode and provided with first through holes 8 at positions corresponding to the fluid inlets 2.
The cylinder 1 is hollow to accommodate a plurality of vortex tubes 5, and has two ends in a length direction X of the cylinder 1, one end being a high-temperature fluid outlet end and the other end being a low-temperature fluid outlet end. The side wall of the cylinder 1 is provided with a fluid inlet 2, so that after the fluid entering through the fluid inlet 2 is acted by the vortex tube 5 in the cylinder 1, the high-temperature fluid flows out through a high-temperature fluid outlet, and the low-temperature fluid flows out through a low-temperature fluid outlet. It is to be noted that the shape of the cylinder 1 is not particularly limited in this application, and the cylinder 1 may be a cylindrical shape of a hollow structure as shown in the drawings, or may be a square structure, a polygonal three-dimensional structure, or the like of a hollow structure.
In addition, the number of the fluid inlets 2 formed in the side wall of the cylinder 1 is not particularly limited, only one or more fluid inlets 2 can be formed in the circumferential direction on the side wall of the cylinder 1, and the fluid inlet amount in unit time is increased, so that the efficiency of entering the cylinder 1 by the fluid can be improved, and the energy utilization rate is improved.
The plurality of vortex tubes 5 are arranged in parallel in the cylinder 1, for example, the plurality of vortex tubes 5 may be arranged in parallel in the cylinder 1, and in an exemplary embodiment, the plurality of vortex tubes 5 may also be arranged at equal intervals, that is, any two adjacent vortex tubes 5 may have the same interval in the arrangement direction thereof.
The two ends of the vortex tube 5 extend to the two ends of the cylinder 1 along the length direction X of the cylinder 1, namely, one end of the vortex tube 5 extends to the high-temperature fluid outlet of the cylinder 1, and the other end extends to the low-temperature fluid outlet of the cylinder 1, so that one part of the fluid entering the vortex tube 5 flows out through the high-temperature fluid outlet and the other part flows out through the low-temperature fluid outlet.
The vortex tube 5 is arranged in a hollow manner, and a first through hole 8 is formed in a position corresponding to the fluid inlet 2, and the hollow arrangement of the vortex tube 5 is to enable fluid to enter the inner cavity of the vortex tube 5 so as to be split into high-temperature fluid and low-temperature fluid under the action of the internal structure of the vortex tube 5. The first through hole 8 is opened at a position corresponding to the fluid inlet 2, so that the fluid entering from the fluid inlet 2 of the cylinder 1 can enter the inner cavity of the vortex tube 5 through the first through hole 8. In this exemplary embodiment, the number of the first through holes 8 may be plural, and the plural first through holes 8 may be disposed toward the fluid inlet 2 at equal intervals, and it may be understood that the plural first through holes 8 are disposed, which is beneficial to improving the efficiency of the fluid entering the vortex tube 5, and thus is beneficial to improving the energy utilization rate of the fluid. For example, the vortex tube 5 is provided with a plurality of first through holes 8, at least part of the first through holes 8 are circumferentially arranged in the radial direction of the vortex tube 5, and the plurality of first through holes 8 may be circumferentially arranged along the wall of the vortex tube to form a group, or may be arranged in multiple groups along the length direction X of the vortex tube 5. The number of first through holes 8 is not particularly limited, and in order to increase the efficiency of the fluid entering the interior chamber of the vortex tube 5, a plurality of groups may be provided in general.
The two sealing heads 3 are respectively fixed at the two ends of the cylinder body 1, and the sealing connection between the sealing heads 3 and the cylinder body 1 is to avoid fluid leakage. The seal head 3 is respectively provided with a fluid outlet 4, one fluid outlet 4 is a low-temperature fluid outlet, the other fluid outlet 4 is a high-temperature fluid outlet, namely, the fluid flowing out of each vortex tube 5 flows out through the fluid outlet 4 of the seal head 3 under the action of the seal head 3.
It should be noted that the fluid mentioned in the present application may be compressed air, that is, compressed air enters each vortex tube 5 from the fluid inlet 2 of the cylinder 1, and is separated into low-temperature compressed air and high-temperature compressed air after passing through the internal structure of the vortex tube 5. Of course, it should be understood that the specific use scenario of the vortex generator is not particularly limited in this application.
The vortex generator 18 provided by the application is used for dividing compressed air into high-temperature fluid and low-temperature fluid, outputting the low-temperature fluid through the low-temperature fluid outlet and outputting the high-temperature fluid through the high-temperature fluid outlet, so that the pressure potential energy of the compressed air is converted into high-temperature energy and low-temperature energy, when the vortex generator is applied to a supercritical carbon dioxide (sCO 2) energy conversion system, the high-temperature energy and the low-temperature energy separated by the vortex generator can be respectively used for preheating and precooling the sCO2 energy conversion system, the hot end temperature of a sCO2 working medium of the system is improved, the cold end temperature of the sCO2 working medium of the system is reduced, and the high-efficiency utilization of the compressed air energy is realized, and the efficiency of the sCO2 energy conversion system is improved.
The following describes the structure of the vortex generator provided by the application and the principle of preheating and precooling a supercritical carbon dioxide (scco 2) energy conversion system by using compressed air when the vortex generator is applied to the scco 2 energy conversion system.
As shown in fig. 3, 4, and 7, in an exemplary embodiment, the vortex generator 18 may further include a first tube sheet 61, a first spoiler 221, a second spoiler 222, and a second tube sheet 62 disposed in the barrel 1 in order along the length direction X of the barrel 1; the first tube plate 61 and the second tube plate 62 are located at both ends of the cylinder 1; the first flow blocking plate 221 and the second flow blocking plate 222 and the inner cavity of the cylinder body 1 enclose a medium flow area, and the first through hole 8 is positioned in the medium flow area; the first tube plate 61, the first spoiler 221, the second spoiler 222 and the second tube plate 62 are provided with second through holes 7, and the vortex tube 5 passes through each second through hole 7.
Wherein, as shown in fig. 7, the first tube plate 61, the first spoiler 221, the second spoiler 222 and the second tube plate 62 may have the same structure, and the vortex tube 5 passes through each second through hole 7, so that the first tube plate 61, the first spoiler 221, the second spoiler 222 and the second tube plate 62 may function to fix and support the vortex tube 5.
The first flow blocking plate 221 and the second flow blocking plate 222 are located between the first tube plate 61 and the second tube plate 62, and the first flow blocking plate 221 and the second flow blocking plate 222 and the inner cavity of the cylinder 1 enclose a medium flow area, and the first through hole 8 is located in the medium flow area, so that the first flow blocking plate 221 and the second flow blocking plate 222 can block the compressed air entering the cylinder 1 and block the compressed air from flowing out of the medium flow area, so that the compressed air entering from the fluid inlet 2 can only enter the inner cavity of the vortex tube 5 through the first through hole 8 on the vortex tube 5, and it can be understood that compared with the structure that the tube plates are arranged at two ends of the cylinder 1 to form the medium flow area, the space of the medium flow area is reduced by the first flow blocking plate 221 and the second flow blocking plate 222 which are additionally arranged in the area corresponding to the fluid inlet 2, thereby being more beneficial to the formation of negative pressure of the compressed air and improving the efficiency of the compressed air entering the inner cavity of the vortex tube 5.
As shown in fig. 5, in the exemplary embodiment of the present application, the first tube plate 61 is located at the low-temperature fluid outlet side, the second tube plate 62 is located at the high-temperature fluid outlet side, and the first spoiler 221 is located at the side of the second spoiler 222 remote from the second tube plate 62; the end of the vortex tube 5 facing the low-temperature fluid outlet is a cold fluid outlet end, and the end facing the high-temperature fluid outlet is a hot fluid outlet end. The vortex tube 5 comprises a first choke body 10 and a second choke body 9, the first choke body 10 is positioned between the first through hole 8 and the cold fluid outlet end, the outer wall of the first choke body 10 is in sealing connection with the inner wall of the vortex tube 5, the middle part of the first choke body 10 is provided with a fluid channel, and the direction of the fluid channel is the same as the length direction X of the vortex tube 5; the second choke body 9 is located between the first through hole 8 and the hot fluid outlet end, the second choke body 9 encloses into a sealing structure in the pipe diameter direction of the vortex tube 5, and a gap for fluid to pass through is formed between the edge of the sealing structure and the inner wall of the vortex tube 5.
Wherein the first tube plate 61 is located at the side of the low temperature fluid outlet, the second tube plate 62 is located at the side of the high temperature fluid outlet, i.e. the tube plate near the low temperature fluid outlet is the first tube plate 61, and the tube plate near the high temperature fluid outlet is the second tube plate 62.
The first spoiler 221 is located on the side of the second spoiler 222 away from the second tube plate 62, i.e. the spoiler located on the side of the medium flow zone close to the first tube plate 61 is the first spoiler 221, and the spoiler located on the side of the medium flow zone close to the second tube plate 62 is the second spoiler 222.
The vortex tube 5 is used for enabling compressed air entering the vortex tube 5 to form high-speed rotating air flow, the air close to the inner wall of the vortex tube 5 is in a high-flow-rate state under the action of centrifugal force, and the air in the center of the vortex tube 5 is in a low-flow-rate state. According to the principle of gas molecular dynamics, the greater the movement speed of molecules, the more violent the mutual collision among the molecules, the higher the internal energy, the macroscopic appearance is that the temperature of compressed air is higher, and the lower the temperature is on the contrary. It can be seen that the compressed air proximate to the inner wall of the vortex tube 5 has a high flow rate and a high temperature, while the compressed air distal to the inner wall of the vortex tube 5 has a low flow rate and a low temperature.
One end of the vortex tube 5 facing the low-temperature fluid outlet is a cold fluid outlet end, one end facing the high-temperature fluid outlet is a hot fluid outlet end, namely, the low-temperature fluid outlet corresponds to the cold fluid outlet end, the high-temperature fluid outlet corresponds to the hot fluid outlet end, one part of air in the vortex tube 5 flows out of the low-temperature fluid outlet of the cylinder 1 through the cold fluid outlet, and the other part flows out of the high-temperature fluid outlet of the cylinder 1 through the hot fluid outlet.
A first baffle 10 is located between the first through hole 8 and the cold fluid outlet end to separate the cold fluid by the action of the first baffle 10. The outer wall of the first choke body 10 is in sealing connection with the inner wall of the vortex tube 5, so as to block high-temperature fluid close to the inner wall of the vortex tube 5. The middle part of the first choke body 10 is provided with a fluid channel, the extending direction of the fluid channel is the same as the length direction X of the vortex tube 5, so that the cold fluid far away from the inner wall of the vortex tube 5 can flow out through the fluid channel, namely, the low-speed and low-temperature air in the vortex tube 5 flows out from the cold fluid outlet end through the fluid channel on the first choke body 10. In this exemplary embodiment, the first choke body 10 may have an annular structure, and the middle portion of the first choke body 10 is provided with a fluid channel, that is, a fluid channel is provided in the axial direction of the first choke body 10, in other words, the radial direction of the first choke body 10 has a certain thickness, so that the first choke body 10 can block high-temperature fluid and pass through low-temperature fluid.
A second flow blocking body 9 is located between the first through hole 8 and the hot fluid outlet end to separate the hot fluid by the action of the second flow blocking body 9. Specifically, the second blocking body 9 encloses into a sealing structure along the pipe diameter direction of the vortex tube 5, and a gap for fluid to pass through is formed between the edge of the sealing structure and the inner wall of the vortex tube 5, so that low-speed and low-temperature air far away from the inner wall of the vortex tube 5 can be blocked by the second blocking body 9, and high-speed and high-temperature air close to the inner wall of the vortex tube 5 can be led out, and separation of the high-temperature air and the low-temperature air is realized.
As shown in fig. 5, in an exemplary embodiment of the present application, the first blocking body 10 may have a ring shape, the first blocking body of the ring structure has an inner diameter and an outer diameter, and a ratio of the inner diameter to the outer diameter is 1/3 to 2/3.
Wherein the first baffle 10 may be annular in shape, the annular structure having an inner bore such that cryogenic air can be conducted out through the inner bore. It should be understood that the shape of the first choke body 10 needs to be matched with the vortex tube 5, for example, when the vortex tube 5 is in a cylindrical structure, the first choke body 10 is in a ring shape, or when the vortex tube 5 is in a square tube, the first choke body 10 is in a square ring shape, so long as good tightness between the outer surface of the first choke body 10 in the ring structure and the inner tube wall of the vortex tube 5 is ensured.
The ratio of the inner diameter to the outer diameter of the first choke body 10 is 1/3-2/3, for example, 1/3, 2/5, 3/7, 1/2, 5/9, 2/3, etc., so that the first choke body 10 not only has a good guiding effect on low-temperature air, but also has a good blocking effect on high-temperature air.
As shown in fig. 5, in an exemplary embodiment of the present application, the second choke body 9 may be tapered, the axial direction of the second choke body 9 is the same as the length direction X of the vortex tube 5, and the end surface area of the second choke body 9 of the tapered structure gradually decreases from the hot fluid outlet end to the cold fluid outlet end; the ratio of the gap value of the gap along the pipe diameter direction of the vortex pipe to the inner diameter of the vortex pipe is 1/10-3/10.
The second choke body 9 is tapered, and the end surface area of the second choke body 9 of the tapered structure gradually decreases from the hot fluid outlet end to the cold fluid outlet end, that is, the end of the tapered structure with smaller end surface area faces the cold fluid outlet end of the vortex tube, so that the fluid medium in the inner cavity of the vortex tube 5 can only flow out through the gap between the tapered structure and the inner wall of the vortex tube 5, that is, only the high-temperature air near the wall surface of the inner wall channel is allowed to flow out, and therefore the side outlet flows out the high-temperature air.
The axial direction of the second choke body 9 refers to the direction in which the area of the end face of the conical structure gradually decreases, and the axial direction of the second choke body 9 is the same as the length direction X of the vortex tube 5, which means that in the present exemplary embodiment, the area of the end face of the second choke body 9 gradually decreases from the hot fluid outlet to the cold fluid outlet along the length direction X of the vortex tube 5.
Furthermore, it should be appreciated that the profile of the second baffle 9 needs to match the shape of the inner tube wall of the vortex tube 5. For example, in the present exemplary embodiment, the vortex tube 5 is circular, and the second choke body 9 may be conical.
The ratio of the gap value of the gap along the pipe diameter direction of the vortex pipe to the inner diameter of the vortex pipe is 1/10-3/10, for example, 1/10, 3/20, 1/5, 1/4, 3/10 and the like, and by arranging smaller gaps, the second choke body 9 can exert the choke effect on low-temperature fluid and ensure the passing efficiency of high-temperature gas.
Furthermore, the tapered structure described in the embodiments of the present application means that the second blocking body 9 is in a tapered structure as a whole, and is not particularly limited to a regular positive cone. For example, the second blocking body 9 may have a tapered mesa structure, that is, the second blocking body 9 has two end faces, and the end face area gradually decreases from one end to the other end. Alternatively, the second blocking body 9 may have a forward tapered structure, i.e., the second blocking body 9 has an end face and a taper. Further, the second blocking body 9 may have other structures, for example, may be a cylinder or the like. As long as the second flow-blocking body 9 forms a seal in the cross-sectional direction of the swirl tube 5 and a gap is provided between the edge of the seal and the inner wall of the swirl tube 5, no further development is possible here.
As shown in fig. 5, in the exemplary embodiment of the present application, the inner cavity of the vortex tube 5 may gradually increase from the first choke 10 to the cryogenic fluid outlet, forming a diffuser. In the flowing process of the fluid, the flow speed is gradually reduced, the pressure is gradually increased, the pressure difference between the fluid and the outside of the outlet is gradually increased, the pressure difference drives the fluid to flow, the driving force of the fluid to flow is increased, and the fluid flows out of the vortex tube 5 more smoothly.
As shown in fig. 5, in the exemplary embodiment of the present application, an expansion joint 11 for deforming under the fluid pressure of the inner cavity of the vortex tube 5 is provided on the tube wall of the vortex tube 5, and the expansion joint 11 is located between the first through hole 8 and the second choke body 9.
The expansion joint 11 is also called a compensator or an expansion joint, and is a flexible structure provided on the container housing or the pipe in order to compensate for additional stress caused by a temperature difference and mechanical vibration. Because the temperature near the high-temperature fluid outlet of the vortex tube 5 is higher, the tube wall material of the vortex tube 5 is easy to expand and deform, the expansion energy is absorbed by utilizing the deformation of the expansion joint 11 by arranging the expansion joint 11 between the first through hole 8 and the second flow blocking body 9 so as to adapt to the dimensional change generated by thermal expansion, the sealing and the fixation of the vortex tube 5 and the second tube plate 62 are ensured, the integral structure of the vortex generator is ensured to be complete, and the reliability and the stability of equipment are improved.
In an exemplary embodiment, the expansion joint 11 may be a bellows expansion joint. The bellows expansion joint can be made of metal bellows, can stretch and retract along the pipe diameter direction of the vortex pipe 5, also allows a small amount of bending, and can save space, save materials and facilitate standardization and mass production.
Of course, in other embodiments, the expansion joint 11 may be in other forms of flexible connection structure, and is not deployed here.
As shown in fig. 6, in an exemplary embodiment of the present application, the first through hole 8 is opened tangentially to the wall of the vortex tube 5.
Specifically, the direction of opening the first through hole 8 affects the efficiency of forming vortex by the fluid entering the inner cavity of the vortex tube 5. As can be seen intuitively from fig. 6, the first through holes 8 are formed along the tangential direction of the wall of the vortex tube 5, that is, the direction of the first through holes 8 is deviated from the center of the section of the vortex tube 5, and when a plurality of first through holes 8 are formed, the plurality of first through holes 8 can be uniformly deviated from the center of the section of the vortex tube 5 in the anticlockwise direction or in the clockwise direction, so that the fluid can form a vortex in the cavity of the vortex tube 5, the rotating speed of the vortex is improved, and the fluid can be more favorably split into hot fluid and cold fluid.
Furthermore, in order to achieve the above object, exemplary embodiments of the present application further provide a supercritical carbon dioxide energy conversion system, which may include a compressed air energy storage system 27, a vortex generator 18, a second regenerator 152, and a supercritical carbon dioxide energy conversion subsystem, as shown in fig. 2, the compressed air energy storage system 27 may be used to store compressed air; the second regenerator 152 is connected in series with the supercritical carbon dioxide energy conversion subsystem; wherein the fluid inlet 2 of the vortex generator 18 is connected to the output end of the compressed air energy storage system 27, the high temperature fluid outlet of the vortex generator 18 is connected to the second input end of the second regenerator 152, and the vortex generator 18 can be used for preheating the cold fluid flowing through the second regenerator 152; the low-temperature fluid outlet of the vortex generator 18 is connected to the second output end of the second regenerator 152 with the input end of the first pipeline 23, the output end of the first pipeline 23 is connected to the input end of the compressed air energy storage system 27, and the first pipeline 23 can be used for pre-cooling the supercritical carbon dioxide energy conversion subsystem.
The specific manner in which the second regenerator 152 is connected in series to the supercritical carbon dioxide energy conversion subsystem may be, for example: a first input of the second regenerator 152 is connected to an output of the compressor 19, and a first output of the second regenerator 152 is connected to a first input of the first regenerator 151.
In the embodiment of the application, by coupling the compressed air energy storage system 27, the vortex generator 18 and the second heat regenerator 152 on the supercritical carbon dioxide energy conversion subsystem, and coupling the compressed air energy storage system 27, the vortex generator 18 and the second heat regenerator 152 into the whole energy conversion system, the compressed air in the compressed air energy storage system 27 flows through the vortex generator 18, the pressure potential energy of the compressed air is converted into high-temperature fluid and low-temperature fluid, the high-temperature fluid flows out from the high-temperature fluid outlet of the vortex generator 18, flows into the second heat regenerator 152 through the second input end of the second heat regenerator 152, and thus the sCO of the high-temperature fluid to the output end of the compressor 19 flows out and flows into the second heat regenerator 152 2 Preheating; the cryogenic fluid flows out of the cryogenic fluid outlet of vortex generator 18 and merges with the fluid flowing out of the second output of second regenerator 152, such that the fluid flowing out of the second output of first regenerator 151 and into the line of cooler 16 may be pre-cooled, thus helping to increase the system supercritical carbon dioxide, scco, by coupling compressed air energy storage system 27 and vortex generator 18 2 Hot end temperature of working medium, and reduction of system supercritical carbon dioxide sCO 2 The cold end temperature of the working medium is used for realizing the efficient utilization of the energy of the compressed air and improving the supercritical carbon dioxide sCO 2 Efficiency of the energy conversion system. In an exemplary embodiment, the cooler 16 may be a water-cooled structure or an air-cooled structure, and the specific structure of the cooler 16 is not particularly limited herein.
As shown in fig. 2, in the exemplary embodiment of the present application, the compressed air energy storage system 27 includes an air compressor 24, an air cooler 26, and a compressed air storage tank 17, with an input of the air compressor 24 connected to an output of the first conduit 23; the input end of the air cooler 26 is connected with the output end of the air compressor 24, and the output end of the air cooler 26 is connected with the input end of the check valve 25; the input of the compressed air storage tank 17 is connected to the output of the check valve 25 and the output of the compressed air storage tank 17 is connected to the fluid inlet 2 of the vortex generator 18.
Wherein a first valve 201 is arranged between the output end of the compressed air storage tank 17 and the fluid inlet 2; a second valve 202 is provided between the output of the first conduit 23 and the input of the air compressor 24.
Providing the first valve 201 and the second valve 202 may facilitate control of the compressed air energy storage system 27, may selectively open and close the compressed air energy storage system 27, and may adjust the amount of intake air to the system.
The function of the check valve 25 provided between the air cooler 26 and the compressed air storage tank 17 is to allow only compressed air to flow from the air cooler 26 into the compressed air storage tank 17, but not to allow the compressed air to flow in reverse.
In the exemplary embodiment, compressed air energy storage system 27 operates as follows: the second valve 202 and the first valve 201 are opened in sequence, the compressed air in the compressed air tank 17 flows into the vortex generator 18, and the compressed air is divided into a high-temperature compressed air and a low-temperature compressed air by the vortex generator 18, and at the same time, the pressure potential energy of the compressed air is reduced. The high-temperature compressed air flows in from the second input end of the second regenerator 152 and flows out from the second output end of the second regenerator 152, the low-temperature compressed air directly flows out from the low-temperature fluid outlet of the vortex generator 18, the two compressed air flows in the first pipeline 23 to be mixed, then flows back to the air compressor 24 through the second valve 202, the air compressor 24 recompresses the mixed compressed air, then dissipates heat through the air cooler 26, and finally is conveyed into the compressed air storage tank 17, and the compressed air is recycled in the compressed air energy storage system 27.
The air compressor 24 may be powered by an unstable, discontinuous source of new energy, such as solar energy, to provide compressed air for the compressed air storage system 27 continuously by the work performed by the air compressor 24.
In an exemplary embodiment, as shown in fig. 2, the first pipeline 23 may have a bent portion wound around a flow pipeline of the reflux medium of the supercritical carbon dioxide energy conversion subsystem.
Wherein the bending part 21 hasThe body is wound on the pipeline between the second output end of the first heat regenerator 151 and the input end of the cooler 16, the low-temperature fluid flowing out of the low-temperature fluid outlet of the vortex generator 18 and mixed with the fluid flowing out of the second output end of the second heat regenerator 152 flows in the bending part 21, so that the high-temperature sCO of the first heat regenerator 151 can be obtained by winding the first pipeline 23 on the pipeline of the reflux medium 2 Before the working medium flows into the cooler 16, the working medium is subjected to high temperature sCO 2 The working medium is pre-cooled, so that the efficiency of the sCO2 energy conversion system is improved by utilizing the energy of the compressed air.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (13)
1. A vortex generator, comprising:
a cylinder body having a high temperature fluid outlet and a low temperature fluid outlet at both ends in a length direction thereof, and having a fluid inlet on a side wall thereof;
the two sealing heads are respectively fixed at two ends of the cylinder body and are in sealing connection with the cylinder body, a fluid outlet is arranged on each sealing head, one fluid outlet is the low-temperature fluid outlet, and the other fluid outlet is the high-temperature fluid outlet;
the vortex tubes are arranged in the cylinder in parallel, two ends of each vortex tube extend to two ends of the cylinder along the length direction of the cylinder, and the vortex tubes are arranged in a hollow mode and are provided with first through holes at positions corresponding to the fluid inlets.
2. The vortex generator of claim 1 further comprising a first tube sheet, a first spoiler, a second spoiler, and a second tube sheet disposed in the barrel in sequence along a length of the barrel;
the first tube plate and the second tube plate are positioned at two ends of the cylinder;
the first flow blocking plate, the second flow blocking plate and the inner cavity of the cylinder body enclose a medium flow area, and the first through hole is positioned in the medium flow area;
the first tube plate, the first flow blocking plate, the second flow blocking plate and the second tube plate are all provided with second through holes, and the vortex tube penetrates through each second through hole.
3. The vortex generator of claim 2 wherein the first tube sheet is located on the low temperature fluid outlet side, the second tube sheet is located on the high temperature fluid outlet side, and the first spoiler is located on a side of the second spoiler remote from the second tube sheet;
one end of the vortex tube facing the low-temperature fluid outlet is a cold fluid outlet end, and one end facing the high-temperature fluid outlet is a hot fluid outlet end; the vortex tube comprises:
the first choke body is positioned between the first through hole and the cold fluid outlet end, the outer wall of the first choke body is in sealing connection with the inner wall of the vortex tube, a fluid channel is formed in the middle of the first choke body, and the extending direction of the fluid channel is the same as the length direction of the vortex tube;
the second flow blocking body is positioned between the first through hole and the hot fluid outlet end, a sealing structure is formed by the second flow blocking body in a surrounding mode in the pipe diameter direction of the vortex pipe, and a gap through which fluid can pass is formed between the edge of the sealing structure and the inner wall of the vortex pipe.
4. A vortex generator according to claim 3 wherein the first flow blocking body is annular, the first flow blocking body of annular configuration having an inner diameter and an outer diameter, and the ratio of the inner diameter to the outer diameter being 1/3 to 2/3.
5. A vortex generator according to claim 3 wherein the second baffle is tapered, the axial direction of the second baffle is the same as the length direction of the vortex tube, and the area of the end face of the second baffle of the tapered structure gradually decreases from the hot fluid outlet end to the cold fluid outlet end;
the ratio of the gap value of the gap along the pipe diameter direction of the vortex pipe to the inner diameter of the vortex pipe is 1/10-3/10.
6. A vortex generator according to claim 3 wherein the internal cavity of the vortex tube increases progressively from the first baffle to the cryogenic fluid outlet end.
7. A vortex generator according to claim 3, wherein an expansion joint for deforming under the fluid pressure of the vortex tube lumen is provided on the wall of the vortex tube, and wherein the expansion joint is located between the first through hole and the second flow blocking body.
8. The vortex generator of claim 7 wherein the expansion joint is a corrugated expansion joint.
9. The vortex generator of claim 1 wherein the vortex tube is provided with a plurality of the first through holes, and at least a portion of the first through holes are circumferentially disposed in a radial direction of the vortex tube.
10. The vortex generator of claim 9 wherein the first through hole opens tangentially to the vortex tube wall.
11. A supercritical carbon dioxide energy conversion system, comprising:
the vortex generator of any one of claims 1-10;
the compressed air energy storage system is used for storing compressed air;
a second regenerator;
the second heat regenerator is connected in series in the supercritical carbon dioxide energy conversion subsystem;
the fluid inlet of the vortex generator is connected with the output end of the compressed air energy storage system, the high-temperature fluid outlet of the vortex generator is connected with the second input end of the second heat regenerator, and the vortex generator is used for preheating cold fluid flowing through the second heat regenerator; the low-temperature fluid outlet of the vortex generator is connected with the second output end of the second heat regenerator, the output end of the first pipeline is connected with the input end of the compressed air energy storage system, and the first pipeline is used for precooling a reflux medium of the supercritical carbon dioxide energy conversion subsystem.
12. The system of claim 11, wherein the compressed air energy storage system comprises:
the input end of the air compressor is connected with the output end of the first pipeline;
the input end of the air cooler is connected with the output end of the air compressor, and the output end of the air cooler is connected with the input end of the check valve;
the input end of the compressed air storage tank is connected with the output end of the check valve, and the output end of the compressed air storage tank is connected with the fluid inlet of the vortex generator;
a first valve is arranged between the output end of the compressed air storage tank and the fluid inlet; a second valve is arranged between the output end of the first pipeline and the input end of the air compressor.
13. The system of claim 11, wherein the first conduit has a bend that is wrapped around a flow conduit of a return medium of the supercritical carbon dioxide energy conversion subsystem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311826965.1A CN117722248A (en) | 2023-12-27 | 2023-12-27 | Vortex generator and supercritical carbon dioxide energy conversion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311826965.1A CN117722248A (en) | 2023-12-27 | 2023-12-27 | Vortex generator and supercritical carbon dioxide energy conversion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117722248A true CN117722248A (en) | 2024-03-19 |
Family
ID=90203444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311826965.1A Pending CN117722248A (en) | 2023-12-27 | 2023-12-27 | Vortex generator and supercritical carbon dioxide energy conversion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117722248A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1231369A2 (en) * | 1985-01-21 | 1986-05-15 | Уфимский Нефтяной Институт | Vortex vertical shell-and-tube heat exchanger |
| CN202973653U (en) * | 2012-09-21 | 2013-06-05 | 大连理工大学 | Multi-tube-bundle vortex tube integrated device |
| KR20160124645A (en) * | 2015-10-16 | 2016-10-28 | 홍복식 | Eddy current boiler combined with auxiliary heat pipe |
| CN107687717A (en) * | 2017-08-07 | 2018-02-13 | 大连理工大学 | A kind of vertical multi-pipe cluster type forces the cooling cold and hot separator of vortex tube |
| CN108495520A (en) * | 2018-03-13 | 2018-09-04 | 马鞍山钢铁股份有限公司 | Electrical cabinet heating and refrigerating plant and its application method |
| CN211233486U (en) * | 2019-12-26 | 2020-08-11 | 南京工业大学 | Air conditioner outdoor unit defrosting system integrating vortex tube and semiconductor refrigerating sheet |
| CN115046309A (en) * | 2022-06-27 | 2022-09-13 | 中国科学院工程热物理研究所 | Vortex tube carbon dioxide heat pump system and heat recovery method thereof |
-
2023
- 2023-12-27 CN CN202311826965.1A patent/CN117722248A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1231369A2 (en) * | 1985-01-21 | 1986-05-15 | Уфимский Нефтяной Институт | Vortex vertical shell-and-tube heat exchanger |
| CN202973653U (en) * | 2012-09-21 | 2013-06-05 | 大连理工大学 | Multi-tube-bundle vortex tube integrated device |
| KR20160124645A (en) * | 2015-10-16 | 2016-10-28 | 홍복식 | Eddy current boiler combined with auxiliary heat pipe |
| CN107687717A (en) * | 2017-08-07 | 2018-02-13 | 大连理工大学 | A kind of vertical multi-pipe cluster type forces the cooling cold and hot separator of vortex tube |
| CN108495520A (en) * | 2018-03-13 | 2018-09-04 | 马鞍山钢铁股份有限公司 | Electrical cabinet heating and refrigerating plant and its application method |
| CN211233486U (en) * | 2019-12-26 | 2020-08-11 | 南京工业大学 | Air conditioner outdoor unit defrosting system integrating vortex tube and semiconductor refrigerating sheet |
| CN115046309A (en) * | 2022-06-27 | 2022-09-13 | 中国科学院工程热物理研究所 | Vortex tube carbon dioxide heat pump system and heat recovery method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8282025B2 (en) | Ejector | |
| US10371015B2 (en) | Supercritical CO2 generation system for parallel recuperative type | |
| JP5509466B2 (en) | Finned cylindrical heat exchanger | |
| CN100532946C (en) | Bolt capable of internal cooling | |
| US20020046830A1 (en) | Air conditioner with internal heat exchanger and heat exchanger tube therefor | |
| US20150267918A1 (en) | Combustion chamber with cooling sleeve | |
| US9085982B2 (en) | Gas turbine | |
| CN117722248A (en) | Vortex generator and supercritical carbon dioxide energy conversion system | |
| CN117662266A (en) | Vortex generator and supercritical carbon dioxide energy conversion system | |
| CN107356008B (en) | Intermediate heat exchanger of coaxial type primary Stirling secondary pulse tube mixed refrigerator | |
| CN101566405A (en) | Thermally-driven thermoacoustic refrigerator device in traveling and stationary wave type acoustic field | |
| CN216347148U (en) | Stirling refrigerator | |
| JP2012251697A (en) | Steam generator | |
| CN109989832A (en) | A kind of expansion pre-cooling cycle system for aerospace engine | |
| CN216044080U (en) | Novel low-resistance LNG self-booster for ship | |
| KR102184979B1 (en) | Turbo-vortex expander | |
| WO2018131142A1 (en) | Transition piece | |
| CN210532727U (en) | Cryogenic refrigerator | |
| CN113738513A (en) | Cooling device and ship power airflow cooler | |
| CN207866045U (en) | Bundled tube double-tube heat exchanger pipeline structure part | |
| CN217110585U (en) | Gas cooler with snakelike heat exchange tube for carbon dioxide heat pump | |
| CN215864161U (en) | Tower type condenser for refrigerating machine and refrigerating machine comprising same | |
| CN214887547U (en) | Water-cooled mining air compressor with air return heating function | |
| CN105222387A (en) | A kind of pulse tube expander | |
| CN215109180U (en) | Heat 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 |