CN116173526B - Thin film evaporation rotational flow type two-phase fluid evaporator - Google Patents
Thin film evaporation rotational flow type two-phase fluid evaporator Download PDFInfo
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- CN116173526B CN116173526B CN202211551945.3A CN202211551945A CN116173526B CN 116173526 B CN116173526 B CN 116173526B CN 202211551945 A CN202211551945 A CN 202211551945A CN 116173526 B CN116173526 B CN 116173526B
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- 239000012530 fluid Substances 0.000 title claims abstract description 70
- 238000001704 evaporation Methods 0.000 title claims abstract description 66
- 230000008020 evaporation Effects 0.000 title claims abstract description 58
- 239000010409 thin film Substances 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 136
- 239000010408 film Substances 0.000 claims abstract description 11
- 238000005192 partition Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 12
- 230000004907 flux Effects 0.000 description 9
- 238000012546 transfer Methods 0.000 description 6
- 230000002209 hydrophobic effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000036544 posture Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000005514 two-phase flow Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical group 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
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- 238000011084 recovery Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a thin film evaporation rotational flow type two-phase fluid evaporator, which comprises a steam cover plate, an inlet cover plate, a rotational flow evaporation chamber, an outlet cover plate and a hydrophilic capillary sheet, wherein the steam cover plate is arranged on the inlet cover plate; the hydrophilic capillary sheet is arranged at the inner bottom of the cyclone evaporation chamber and provides capillary driving force, the two-phase fluid evaporator is assisted by the pump to perform cyclone liquid supply, the limit of liquid supply of the capillary core of the traditional two-phase fluid evaporator by capillary force is overcome, larger heat dissipation capacity can be realized, and the radial liquid distribution of the capillary core is ensured to be more uniform by the cyclone liquid supply mode; the hydrophilic capillary core sheet is adopted for liquid absorption evaporation, so that film evaporation with higher heat exchange coefficient can be realized, and the heat exchange efficiency in the evaporation process is improved.
Description
Technical Field
The invention relates to the field of heat dissipation, in particular to a heat dissipation structure of a thin film evaporation two-phase fluid evaporator driven by capillary force, wherein the evaporator adopts a cyclone structure and a thin film structure, so that liquid supply is uniform, and a heat transfer path is shortened to improve heat exchange efficiency.
Background
With the development of electronic technology, electronic products are increasingly powered, thereby increasing heat flux. Accordingly, two-phase fluid heat transfer techniques have been applied to products or environments having high heat flux densities to dissipate heat. In contrast to air-cooled heat dissipation techniques and liquid-cooled heat dissipation techniques, two-phase flow heat dissipation techniques are considered as one of the most promising heat dissipation modes. The traditional two-phase flow heat dissipation technology comprises a heat exchange heat pipe, a pump driven two-phase flow loop, a pump auxiliary capillary force driven two-phase flow loop, a capillary force pumping loop and the like. The invention patent application with publication number of CN111504103A discloses a pump-driven two-phase fluid loop evaporator, which comprises an evaporator shell, a hydrophobic capillary core, an axial liquid channel and an axial steam trunk, wherein the hydrophobic capillary core is arranged in the evaporator shell, a plurality of axial liquid channels are arranged between the evaporator shell and the hydrophobic capillary core, the axial steam trunk is arranged in the hydrophobic capillary core, liquid is supplied to the axial liquid channels through a gear pump and heated by a heat source, the hydrophobic capillary core separates the liquid from generated steam, and the steam is discharged to the axial steam trunk and finally discharged out of the evaporator.
However, the existing evaporator is not uniform in liquid supply to the heat exchange part, and the long distance from the inlet side to the outlet side is easy to cause drying and uneven temperature control; in addition, for a two-phase fluid evaporator driven by capillary force, excessive thickness of the liquid immersed capillary core can cause extra heat transfer resistance, so that efficient heat transfer is difficult to perform, and the efficiency of liquid evaporation is further affected; finally, the recovery design of the vapor and the excess liquid generated by the evaporator is not ideal enough, i.e. the vapor-liquid separation characteristics of the evaporator itself need to be more reasonably designed to meet the heat dissipation requirement of high heat flux density.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a two-phase fluid loop evaporator which has the advantages of more efficient heat transfer mode leading, uniform liquid supply, small flow resistance and high heat exchange efficiency.
In order to solve the above problems, the present invention discloses a thin film evaporation cyclone type two-phase fluid evaporator, comprising: a liquid inlet chamber having an annular region and connected to the liquid passage through a liquid inlet; a swirl flow passage having an annular region and located inside the liquid inlet chamber, communicating with the liquid inlet chamber through a liquid swirl inlet; a steam cavity located in the central region and communicating with the steam passage through a steam trunk; hydrophilic capillary sheet, fluid working medium enters the steam cavity from the rotational flow channel through the hydrophilic capillary sheet; the liquid outlet cavity is positioned at the outer side of the cyclone flow channel and is communicated with the cyclone flow channel through a liquid cyclone outlet; the heating surface corresponds to the hydrophilic capillary sheet area in the steam cavity, and the fluid working medium is subjected to film evaporation under the action of the heating surface.
Preferably, the liquid swirl inlets are plural and are arranged tangentially with respect to the annular region of the swirl flow channel; the liquid swirl outlets are a plurality of, which are located at the lower side of the liquid swirl inlet and are arranged in a tangential manner with respect to the annular region of the swirl flow channel.
Preferably, the hydrophilic capillary sheet is positioned at the bottoms of the cyclone flow channel and the steam cavity, and after the liquid working medium enters the cyclone flow channel, one part enters the steam cavity through the hydrophilic capillary sheet under capillary action and is vaporized, and the other part is still discharged from the liquid cyclone outlet to the liquid outlet cavity in a liquid form.
Preferably, the steam cover plate comprises a steam trunk and a first partition plate; the first partition plate divides the inner cavity of the cyclone evaporation chamber into a cyclone flow channel and a steam cavity, and the hydrophilic capillary sheet is positioned at the bottom of the inner cavity and communicates the cyclone flow channel with the steam cavity; the outer wall of the cyclone evaporation chamber is also provided with an annular second baffle plate; an inlet cover plate, the inlet cover plate and a second partition plate of the cyclone evaporation chamber defining a liquid inlet chamber; an outlet cover plate, the outlet cover plate and the second partition plate of the cyclone evaporating chamber define a liquid outlet chamber.
Preferably, the liquid cyclone inlet and the liquid cyclone outlet are both arranged on the side wall of the cyclone evaporation chamber, and the liquid cyclone inlet is positioned above the liquid cyclone outlet.
The beneficial effects of the application are as follows:
1) The thin film evaporation cyclone type two-phase fluid evaporator provided by the application creatively provides a cyclone mode for supplying fluid working media, the cyclone evaporation chamber is provided with a plurality of cyclone inlets which are uniformly distributed, cyclone liquid supply can be carried out, and in the cyclone flow channel, liquid is more uniformly distributed in the annular area of the hydrophilic capillary core sheet, so that the uniformity of temperature control is more facilitated; for the two-phase loop evaporator driven by the auxiliary capillary force of the traditional pump, liquid flows from one end of the capillary core to the other end, liquid absorption evaporation is carried out under the action of the capillary force of the capillary core, the liquid distribution in the capillary core is uneven easily caused by the liquid supply mode, and the phenomenon of local dryness is easily generated when the heat flow density is high.
2) The hydrophilic capillary core sheet performs evaporation heat exchange taking film evaporation as a dominant, and has a higher heat exchange coefficient; according to the invention, the hydrophilic capillary core sheet is arranged on the heating surface, liquid is absorbed on the sheet by the capillary force of the sheet, and the hydrophilic capillary core sheet is thin, so that the liquid spreads out into a thin liquid layer on the sheet, and boiling heat exchange mainly comprising film boiling is facilitated.
3) The evaporator is specially provided with channels for steam and liquid, so that generated steam can be discharged more quickly, and meanwhile, the steam is not condensed with liquid which does not participate in evaporation, so that the resistance of fluid flowing through the evaporator is reduced; in addition, the liquid channel can timely discharge redundant liquid, so that the capillary core is prevented from being immersed by the redundant liquid, and the thin film evaporation is facilitated. The hydrophilic capillary sheet isolates the steam cavities of the cyclone flow channels in the evaporator, and is respectively connected with mutually independent pipelines to respectively transmit gaseous working medium and liquid working medium, so that heat exchange between the steam and the liquid working medium is avoided; the fluid working medium absorbs heat of a heat source and is vaporized on the surface of the hydrophilic capillary sheet at the gas channel side of the evaporator, and capillary force is formed at the same time, the capillary force provides driving force for flowing the liquid permeation capillary core and the gaseous working medium along a pipeline, and the larger the heat load is, the more the fluid working medium is permeated and vaporized, and the larger the capillary force is formed. Therefore, the system can automatically realize the distribution of cold energy according to the need without any regulating valve, is an evaporator capable of adaptively supplying fluid working medium, and the pump is used as a power device and can provide auxiliary driving force for the evaporator to enable the fluid working medium to enter the evaporator at a preset flow rate and pressure, so that the heat exchange efficiency is improved.
4) In view of the high heat flux electrical components being mounted in different devices, these devices will typically be in hybrid motion, such as on board an aircraft, spacecraft. The thin film evaporation rotational flow type two-phase fluid evaporator can be suitable for high heat flow density electric elements in various motion states. The fluid working medium is forced to be driven by centrifugal force in the evaporator, so that the fluid working medium can adapt to various inclination-angle-changing postures of the aircraft, namely, the fluid working medium in a forced rotational flow state can be stably and uniformly supplied to the liquid suction core; secondly, the circumferential flow of the fluid working medium rotational flow can enable the liquid suction core to uniformly suck liquid, so that uneven local liquid supply is avoided; in addition, aiming at the characteristics of multiple heat sources, different working conditions and the like of a heat load object, the temperature control can be better realized by regulating and controlling the flow rate of a pump and utilizing the centrifugal force of fluid working media to assist the liquid suction of a liquid suction core so as to achieve the purpose of adapting to the density of the heated fluid; finally, the mode of supplying fluid working medium in a cyclone mode forces liquid to flow and is more beneficial to stabilizing the flowing posture, and the design of the evaporator is more compact.
5) The swirl flow channel of the evaporator is internally divided into two parts, one part is sucked into the steam cavity to be further evaporated by the film under the action of capillary force, the other part still leaves the swirl flow channel at a higher speed, and the part of the fluid working medium can flush the surface of the hydrophilic capillary sheet at the bottom of the swirl flow channel to bring the residual impurities away from the surface of the hydrophilic capillary sheet, so that the excessive accumulation of the residual impurities is prevented, and the capillary force driving action of the sheet is influenced. And after the fluid working medium tangentially enters the cyclone flow channel from the liquid inlet chamber at a certain pressure, strong three-dimensional elliptic strong rotary shearing turbulence motion is generated. Impurities in the fluid working medium migrate to the side wall of the cyclone flow channel due to the gravity and centrifugal force of the impurities, namely centrifugal sedimentation occurs, and impurity particles move along the side wall of the cyclone flow channel and are discharged through the liquid cyclone outlet, so that the impurities in the fluid working medium can be prevented from being settled on the film.
Drawings
FIG. 1 is a schematic perspective view of a thin film evaporation cyclone two-phase fluid evaporator according to the present invention;
FIG. 2 is a schematic diagram showing a second perspective view of a thin film evaporation cyclone two-phase fluid evaporator according to the present invention;
FIG. 3 is a front view of FIG. 1;
FIG. 4 is a sectional view taken along E-E of FIG. 3;
FIG. 5 is a G-G cross-sectional view of FIG. 3;
FIG. 6 is a cross-sectional view in the H-H direction of FIG. 3;
Reference numerals illustrate:
10. A liquid supply pipe; 11. a liquid inlet; 12. a liquid inlet chamber; 13. a liquid swirl inlet; 14. a swirl flow channel; 15. a steam chamber; 16. a steam trunk; 17. a liquid outlet chamber; 18. a liquid outlet; 19. a liquid swirl outlet; 20. an inlet cover plate; 21. a swirl evaporation chamber; 22. a first separator; 23. a steam cover plate; 24. a liquid outlet pipe; 25. a heating surface; 26. a seal ring; 27. a second separator; 28. an outlet cover plate; 30. hydrophilic capillary sheets.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
As shown in fig. 1 and 2, the thin film evaporation spiral-flow type two-phase fluid evaporator provided by the invention is essentially a pump-assisted capillary force driven spiral-flow type two-phase fluid evaporator, which is mainly driven by capillary force, is assisted by pump driving, and is used for tangentially feeding and leaving fluid working medium from the evaporator at a certain flow rate. Evaporation is the physical process of converting a liquid state into a gaseous state. In general, a vaporizer, i.e. a body in which a liquid substance is converted into a gas state. There are a large number of evaporators in industry, one of which is the evaporator used in refrigeration systems. The evaporator is an important part in four refrigeration parts, and low-temperature condensed liquid passes through the evaporator to exchange heat with outside air, gasify and absorb heat, so that the refrigeration effect is achieved. In this embodiment, the fluid working medium is alkane, alkene, or its halide, or any one of ammonia, methanol, ethanol, and ethylene glycol.
A two-phase fluid evaporator comprising a vapor cover plate 23, an inlet cover plate 20, a cyclonic evaporating chamber 21, an outlet cover plate 28 and a hydrophilic capillary sheet 30; the hydrophilic capillary sheet 30 is arranged at the inner bottom of the cyclone evaporation chamber 21; the steam cover plate 23 is provided with a steam trunk 16 and a steam cavity 15; a cyclone runner 14 is arranged between the steam cover plate 23 and the cyclone evaporation chamber 21; a liquid inlet chamber 12 is arranged between the inlet cover plate 20 and the cyclone evaporation chamber 21; a liquid outlet chamber 17 is arranged between the outlet cover plate 28 and the cyclonic evaporating chamber 21.
When the thin film evaporation cyclone type two-phase fluid evaporator of the embodiment is used, the power of a pump is controlled so as to control the conveying flow and the flow speed of a fluid working medium, the inlet pressure of the fluid working medium at the liquid inlet 11 of the evaporator is adjusted, the fluid working medium of a refrigerating system is connected with the evaporator through the liquid inlet 11, the working medium firstly enters the liquid inlet chamber 12 through the liquid inlet 11 along the tangential direction, the liquid inlet chamber 12 can be regarded as a flow dividing chamber to play a role of uniformly distributing liquid, the liquid enters the cyclone evaporation chamber 21 through a plurality of uniformly distributed liquid cyclone inlets 13, flows in the cyclone flow channel 14, and part of liquid directly flows out of the cyclone evaporation chamber 21 through a plurality of uniformly distributed liquid cyclone outlets 5 and enters the liquid outlet chamber 17 through the liquid cyclone outlet 19 to leave the evaporator; the other part of working medium liquid is sucked into the hydrophilic capillary sheet 30 by capillary force by the hydrophilic capillary sheet 30 arranged at the inner bottom of the cyclone evaporation chamber 21, the bottom of the cyclone evaporation chamber 21 is heated to transfer heat to the hydrophilic capillary sheet 30, the liquid in the sheet is heated to generate film evaporation, so that a large amount of steam is generated, and the generated steam firstly enters the steam cavity 15 and then is discharged out of the evaporator through the steam trunk 16.
Thus, in this embodiment, the fluid working medium is tangentially swirled into the swirling evaporation chamber 21, and the hydrophilic capillary sheet 30 is laid on the bottom surface of the swirling evaporation chamber 21; the fluid working medium whirls on the bottom surface of the whirl evaporating chamber 21 to wash the thin sheet (namely, the liquid suction core), the hydrophilic capillary thin sheet sucks the fluid working medium near the wall surface and at the bottom into the evaporating surface positioned at the center of the evaporator, and the evaporating surface heats the fluid working medium to evaporate; the redundant fluid working medium flows out from the lower part of the cyclone flow channel 14, and the steam is discharged from the upper middle part, so that the film evaporation is realized, the thermal resistance of liquid is reduced as much as possible, the purpose of gas-liquid separation can be achieved, and the design of the whole pump-driven two-phase system is facilitated.
For the materials of each structure of the evaporator, the metal with hydrophilicity is mainly selected, and the bottom of the cyclone evaporation chamber 21 can be in direct contact with a heat source for heat exchange, so that the metal material with good heat conduction performance is preferably prepared; while hydrophilic capillary sheet 30 may be made of any capillary micro-nano structured material selected from metal powder sintering, wire mesh, and the like. The heating surface at the bottom of the cyclone evaporating chamber 21 is generally attached to an electrical component with high heat flux density, for example, a laser diode, a high power sensing chip, etc. for a space communication system, which not only has a high integration level, but also has a heat flux density of hundreds of W/cm 2, and has significant instantaneous periodic working characteristics, and also requires good temperature uniformity.
In use, the high heat flux electrical components are mounted in different devices which will sometimes be in hybrid motion, such as on aircraft, spacecraft. The thin film evaporation cyclone type two-phase fluid evaporator of the embodiment can be suitable for high heat flux density electrical components in various motion states. The fluid working medium is forced to be driven by centrifugal force in the evaporator, so that the fluid working medium can adapt to various inclination-angle-changing postures of the aircraft, namely, the fluid working medium in a forced rotational flow state can be stably and uniformly supplied to the liquid suction core; secondly, the circumferential flow of the fluid working medium rotational flow can enable the liquid suction core to uniformly suck liquid, so that uneven local liquid supply is avoided; in addition, aiming at the characteristics of multiple heat sources, different working conditions and the like of a heat load object, the temperature control can be better realized by regulating and controlling the flow rate of a pump and utilizing the centrifugal force of fluid working media to assist the liquid suction of a liquid suction core so as to achieve the purpose of adapting to the density of the heated fluid; finally, the mode of supplying fluid working medium in a cyclone mode forces liquid to flow, is more beneficial to stabilizing the flowing posture, and also enables the design of the evaporator to be more compact.
In the thin film evaporation rotational flow type two-phase fluid evaporator of the embodiment, because the liquid supply of the capillary core is mainly influenced by the capillary force of the capillary core, the influence of gravity or acceleration can be well avoided, and the stability of the liquid supply is ensured; to avoid excessive liquid entering the hydrophilic capillary sheets 30 and filling the vapor chamber 15 space, this can be accomplished by increasing the heat flux density or by appropriately increasing the back pressure of the vapor chamber 15. The hydrophilic capillary sheet 30 isolates the vapor chambers 15 of the cyclone flow channels 14 in the evaporator from each other, i.e., the liquid channels and the gas channels from each other, and connects the mutually independent pipelines to respectively transmit the gaseous working medium and the liquid working medium. The heat of the heat source absorbed by the working medium is vaporized on the surface of the hydrophilic capillary sheet 30 on the gas channel side of the evaporator, and capillary force is formed at the same time. The capillary force can provide driving force for the liquid to permeate the capillary core and the gas working medium to flow along the pipeline, and it is understood that the larger the heat load is, the more the fluid working medium is permeated and vaporized, and the larger the capillary force is formed. Therefore, the system can automatically realize the distribution of cold energy according to the requirement without any regulating valve, and is an evaporator capable of adaptively supplying fluid working media.
In particular structural mounting, the structural body may be constructed according to the inventive concept of the present embodiment, which is not particularly limited.
In this embodiment, the thin film evaporation cyclone two-phase fluid evaporator comprises a steam cover plate comprising a steam trunk and a first partition; the first partition plate divides the inner cavity of the cyclone evaporation chamber into a cyclone flow channel and a steam cavity, and the hydrophilic capillary sheet is positioned at the bottom of the inner cavity and communicates the cyclone flow channel with the steam cavity; the outer wall of the cyclone evaporation chamber is also provided with an annular second baffle plate; an inlet cover plate, the inlet cover plate and a second partition plate of the cyclone evaporation chamber defining a liquid inlet chamber; an outlet cover plate, the outlet cover plate and the second partition plate of the cyclone evaporating chamber define a liquid outlet chamber.
In the present invention the liquid inlet 11 is chosen to enter the evaporator in a tangential manner to ensure a more even distribution of liquid in the liquid inlet chamber 12, while the evenly distributed plurality of swirl inlets 14 and swirl outlets 5 are also arranged in a tangential perforated manner on the swirl evaporation chamber 21; the hydrophilic capillary sheet 30 may be attached to the vapor cover plate 23 by diffusion welding, or may be attached directly to the inner bottom of the cyclonic evaporator 21 and secured by pressing the vapor cover plate 23.
Preferably, the liquid cyclone outlet arranged below the cyclone flow channel 14 is slightly higher than the hydrophilic capillary sheet 30, the cyclone flow channel of the evaporator in the embodiment divides the fluid working medium into two parts, one part is sucked into the steam cavity to be further evaporated by the film under the action of capillary force, the other part still leaves the cyclone flow channel at a higher speed, the fluid working medium can wash the surface of the hydrophilic capillary sheet at the bottom of the cyclone flow channel, and residual impurities on the surface of the hydrophilic capillary sheet can be carried away, so that the excessive accumulation of the residual impurities is prevented, and the driving action of the capillary force of the sheet is influenced. And after the fluid working medium tangentially enters the cyclone flow channel from the liquid inlet chamber at a certain pressure, strong three-dimensional elliptic strong rotary shearing turbulence motion is generated. Impurities in the fluid working medium migrate to the side wall of the cyclone flow channel due to the gravity and centrifugal force of the impurities, namely centrifugal sedimentation occurs, and impurity particles move along the side wall of the cyclone flow channel and are discharged through the liquid cyclone outlet, so that the impurities in the fluid working medium can be prevented from being settled on the film.
Although the present invention is disclosed above, the present invention is not limited thereto. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (3)
1. A thin film evaporation cyclone type two-phase fluid evaporator, comprising:
a liquid inlet chamber (12) having an annular region and being connected to the liquid channel by a liquid inlet (11);
a swirl flow passage (14) having an annular region and located inside the liquid inlet chamber (12) and communicating with the liquid inlet chamber (12) through a liquid swirl inlet (13);
a steam chamber (15) located in the central region and communicating with the steam passage through a steam trunk (16);
a hydrophilic capillary sheet (30), wherein fluid working medium enters the steam cavity (15) from the cyclone flow channel (14) through the hydrophilic capillary sheet (30);
a liquid outlet chamber (17) which is positioned outside the swirl flow channel (14) and is communicated with the swirl flow channel (14) through a liquid swirl outlet (19);
A heating surface (25) corresponding to the area of the hydrophilic capillary sheet (30) in the steam cavity (15), wherein the fluid working medium is subjected to film evaporation under the action of the heating surface (25);
The hydrophilic capillary sheet (30) is positioned at the bottoms of the cyclone flow channel (14) and the steam cavity (15), after the liquid working medium enters the cyclone flow channel (14), one part enters the steam cavity (15) through the hydrophilic capillary sheet (30) and is vaporized under capillary action, and the other part is still discharged from the liquid cyclone outlet (19) to the liquid outlet cavity (17) in a liquid form;
a steam cover plate (23) comprising a steam trunk (16) and a first partition (22);
The cyclone evaporation chamber (21), the steam cover plate (23) is positioned above the cyclone evaporation chamber (21), the inner cavity of the cyclone evaporation chamber (21) is divided into a cyclone flow channel (14) and a steam cavity (15) by a first partition plate (22), and the hydrophilic capillary sheet (30) is positioned at the bottom of the inner cavity and is communicated with the cyclone flow channel (14) and the steam cavity (15); the outer wall of the cyclone evaporation chamber (21) is also provided with an annular second baffle plate (27);
The liquid cyclone inlet (13) and the liquid cyclone outlet (19) are arranged on the side wall of the cyclone evaporation chamber (21), and the liquid cyclone inlet (13) is positioned above the liquid cyclone outlet (19).
2. The thin film evaporative cyclonic two-phase fluid evaporator as claimed in claim 1, further comprising:
The liquid cyclone inlets (13) are a plurality of and are uniformly arranged along the tangential direction of the annular area of the cyclone flow channel (14);
The liquid swirl outlets (19) are arranged in a plurality, are positioned at the lower side of the liquid swirl inlet (13), and are uniformly arranged along the tangential direction of the annular region of the swirl flow channel (14).
3. The thin film evaporative cyclonic two-phase fluid evaporator as claimed in claim 2, further comprising:
an inlet cover plate (20), the inlet cover plate (20) and a second partition plate (27) of the cyclone evaporation chamber (21) defining a liquid inlet chamber (12);
an outlet cover plate (28), the outlet cover plate (28) and a second partition plate (27) of the cyclone evaporation chamber (21) define a liquid outlet chamber (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211551945.3A CN116173526B (en) | 2022-12-05 | 2022-12-05 | Thin film evaporation rotational flow type two-phase fluid evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211551945.3A CN116173526B (en) | 2022-12-05 | 2022-12-05 | Thin film evaporation rotational flow type two-phase fluid evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116173526A CN116173526A (en) | 2023-05-30 |
| CN116173526B true CN116173526B (en) | 2024-05-03 |
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| CN202211551945.3A Active CN116173526B (en) | 2022-12-05 | 2022-12-05 | Thin film evaporation rotational flow type two-phase fluid evaporator |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB830940A (en) * | 1955-11-30 | 1960-03-23 | Bayer Ag | Improvements relating to film evaporators for liquids |
| DE102005032764A1 (en) * | 2005-07-14 | 2007-01-18 | Hans BÖLLINGHAUS | Collector for energy from all sources on a regenerative basis uses photovoltaic recombination heat and solar excess heat with heat pump and thermo-electric conversion |
| WO2009093838A2 (en) * | 2008-01-21 | 2009-07-30 | Thin-film layered centrifuge device and analysis method using the same | |
| DE102008028854A1 (en) * | 2008-06-19 | 2009-10-01 | Sortech Ag | Evaporator for use in e.g. heat pump, to partially or completely evaporating cooling water, has capillary structure provided in heating surface of heating element and is partially submerged in fluid reservoir |
| CN102790021A (en) * | 2011-05-20 | 2012-11-21 | 奇鋐科技股份有限公司 | Radiating unit and manufacture method thereof and radiating module |
| CN206176830U (en) * | 2016-09-14 | 2017-05-17 | 中海石油气电集团有限责任公司 | Take whirl uniform distributor's cryogen choke valve |
| CN107614997A (en) * | 2015-04-23 | 2018-01-19 | Wga水环球公司 | Condenser-reboiler pipe |
| CN116294301A (en) * | 2022-12-05 | 2023-06-23 | 大连理工大学 | Pump-assisted capillary force driven two-phase fluid heat management system |
-
2022
- 2022-12-05 CN CN202211551945.3A patent/CN116173526B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB830940A (en) * | 1955-11-30 | 1960-03-23 | Bayer Ag | Improvements relating to film evaporators for liquids |
| DE102005032764A1 (en) * | 2005-07-14 | 2007-01-18 | Hans BÖLLINGHAUS | Collector for energy from all sources on a regenerative basis uses photovoltaic recombination heat and solar excess heat with heat pump and thermo-electric conversion |
| WO2009093838A2 (en) * | 2008-01-21 | 2009-07-30 | Thin-film layered centrifuge device and analysis method using the same | |
| DE102008028854A1 (en) * | 2008-06-19 | 2009-10-01 | Sortech Ag | Evaporator for use in e.g. heat pump, to partially or completely evaporating cooling water, has capillary structure provided in heating surface of heating element and is partially submerged in fluid reservoir |
| CN102790021A (en) * | 2011-05-20 | 2012-11-21 | 奇鋐科技股份有限公司 | Radiating unit and manufacture method thereof and radiating module |
| CN107614997A (en) * | 2015-04-23 | 2018-01-19 | Wga水环球公司 | Condenser-reboiler pipe |
| CN206176830U (en) * | 2016-09-14 | 2017-05-17 | 中海石油气电集团有限责任公司 | Take whirl uniform distributor's cryogen choke valve |
| CN116294301A (en) * | 2022-12-05 | 2023-06-23 | 大连理工大学 | Pump-assisted capillary force driven two-phase fluid heat management system |
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|---|---|
| CN116173526A (en) | 2023-05-30 |
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Effective date of registration: 20241011 Address after: Room 1-1335, 1st Floor, Building 041, Building B, No. 188 Jinghua Road, High tech Zone, Ningbo City, Zhejiang Province, 315000 Patentee after: Ningbo Yichu Electrical Technology Co.,Ltd. Country or region after: China Address before: 116033 No.2 linggong Road, Ganjingzi District, Dalian City, Liaoning Province Patentee before: DALIAN University OF TECHNOLOGY Country or region before: China |