CN211651305U - Phase change cold storage device with vortex coil pipe - Google Patents
Phase change cold storage device with vortex coil pipe Download PDFInfo
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- CN211651305U CN211651305U CN202020020852.8U CN202020020852U CN211651305U CN 211651305 U CN211651305 U CN 211651305U CN 202020020852 U CN202020020852 U CN 202020020852U CN 211651305 U CN211651305 U CN 211651305U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a phase change cold storage device with a vortex coil, which belongs to the technical field of low temperature and comprises an inlet pipe, an outlet pipe, a pipe plate, a baffle plate, the vortex coil, a cylinder, a central pipe, a support frame, an end enclosure and a saddle, wherein the pipe plate is fixedly connected with the cylinder, the lower end position and the central position of the pipe plate are respectively provided with an opening, the inlet pipe and the outlet pipe are respectively connected with the openings at the lower end position and the central position of the pipe plate, the baffle plate and the vortex coil are arranged on the central pipe, one end of the central pipe is fixed on the pipe plate, the other end of the central pipe is inserted into the support frame connected with the cylinder, the end enclosure is connected with the cylinder and arranged at the other side opposite to the inlet pipe and the outlet pipe, and. The invention has compact structure, convenient manufacture, easy enhanced heat transfer of the adopted vortex coil pipe, good cold storage effect and wide application range.
Description
Technical Field
The invention belongs to the technical field of low temperature, can be applied to the aspects of public buildings, air-conditioning cold accumulation, refrigeration transportation and the like, and particularly relates to a low-temperature fluid cold energy storage device.
Background
With the rapid development of industrialization, the energy problem gradually becomes a key factor restricting economic development, and how to store energy efficiently becomes a key problem which needs to be solved urgently in industry. The cold storage technology is to store sensible heat or latent heat released by the state change of a working medium, so that the contradiction of uneven distribution of energy sources in time and space is solved, and the cold storage technology is widely applied to various fields of national economy.
At present, most of the existing cold storage devices mainly use ice cold storage and water energy storage devices, and the devices have the disadvantages of complex system, large occupied area, short service life, low efficiency, poor economic benefit and great limitation. The device utilizes the phase change latent heat of the material to store cold, and has the advantages of high energy storage density, constant temperature, high thermal efficiency and the like. Meanwhile, the energy storage density of the phase-change material is obviously higher than that of a water sensible heat storage system, so that the device has a compact structure, small heat loss and great application prospect.
Disclosure of Invention
The invention provides a phase-change cold storage device with a vortex coil aiming at the defects in the prior art, the device is efficient and reliable, and the device has the advantages that: under the influence of the baffle plate, the low-temperature fluid can flow in a periodic direction change along the axial direction when flowing in the shell pass, so that the turbulence degree is increased, and the heat exchange coefficient is improved. Meanwhile, the phase-change material is stored by the vortex-shaped coil pipe with a compact structure, the characteristic of large filling amount is achieved, and the special vortex-shaped structure can enable the internal fluid to generate secondary flow and strengthen heat exchange between the fluid in the pipe and the pipe wall. In addition, the phase change material has wide sources, larger phase change latent heat, better thermal stability and chemical stability, environmental friendliness, safety and reliability, and can be repeatedly used.
In order to solve the technical problems, the invention is realized by the following technical scheme: the phase change cold storage device with the vortex coil comprises an inlet pipe, an outlet pipe, a pipe plate, a baffle plate, the vortex coil, a cylinder, a central pipe, a support frame, an end enclosure and a saddle, wherein the pipe plate is fixedly connected with the cylinder, holes are formed in the lower end position and the central position of the pipe plate respectively, the inlet pipe and the outlet pipe are connected with the holes in the lower end position and the central position of the pipe plate respectively, the baffle plate and the vortex coil are installed on the central pipe, one end of the central pipe is fixed on the pipe plate, the other end of the central pipe is inserted into the support frame connected with the cylinder in a penetrating mode, the end enclosure is connected with the cylinder and arranged on the other side opposite to the inlet pipe and the outlet pipe, and the saddle.
A plurality of vortex-shaped coil pipes are arranged between the baffle plates, and the number of the vortex-shaped coil pipes can be determined according to the actual cold storage capacity; the baffle plate can change the flow direction of the low-temperature fluid in the shell pass, and enhance heat transfer; the center of the baffle plate is provided with a hole, and the whole baffle plate is in an arc shape or a disc-ring shape; the spacing of the baffles can be determined by the media properties, flow rate and size of the device, and is generally no less than one fifth of the length of the cylinder, with the size of the central opening being determined by the diameter of the central tube.
The central pipe can be a single pipe or a double-pipe structure; when the central tube is of a double-tube structure, the central tube mainly comprises an outer tube, an inner tube, an annular tube plate and fins embedded between the inner tube and the outer tube; and a phase-change material is filled between the inner pipe and the outer pipe.
The fins may be round fins, helical fins, corrugated fins, pin fins, or the like.
The support frame comprises a sleeve and support rib plates, the number of the rib plates can be determined according to actual conditions, and the diameter of the sleeve is slightly larger than that of the central pipe.
The vortex coil pipe is composed of a backing strip, a backing ring, a support ring, a base backing strip and a coil pipe.
Preferably, the outer diameter of the coil can be phi 19mm, phi 25mm, phi 32mm and other common heat exchange tube sizes.
And a backing ring is spot-welded between the coil pipe rings, and the thickness of the backing ring can be determined according to actual conditions and is generally-mm.
The inner ring of the coil pipe is uniformly distributed and fixed by the backing rings and is spot-welded on the supporting rings, and then the backing rings are welded one by one along the radial direction by taking the backing rings as a substrate; after the coil pipe is wound for a plurality of circles, filler strips are uniformly distributed and added between the backing rings along the circumferential direction and serve as an added base, the backing rings are continuously welded in the next circle, and the backing rings are finally distributed in a radial mode in a stepwise increasing mode along the plane.
The initial adding position and number of the cushion strips can be determined according to the overall size of the spiral coil; the backing strip is straight, and the thickness of the backing strip is consistent with that of the backing ring.
The inner diameter of the support ring is the same as the outer diameter of the central pipe; the thickness of the support ring is consistent with that of the backing ring, and the length of the support ring is slightly larger than the outer diameter of the coil pipe.
A gap between the support ring and the inner ring of the coil pipe needs to be lined with a base gasket strip, and the thickness of the base gasket strip needs to be determined by combining the outer diameter of the coil pipe.
The phase change material in the coil pipe is selected according to the temperature range of application, and can be an organic or inorganic phase change material or a composite phase change material.
Preferably, the phase change material in the coil tube is mainly an organic phase change material such as octanoic acid, nonanoic acid, decanoic acid, dodecanol, t-amyl alcohol, ethylene glycol, n-dodecane, n-tetradecane, n-pentadecane, and n-hexadecane, or an inorganic phase change material such as NaSO HO and GeSbTe, or may be a composite phase change material composed of two or more materials.
The fluid in the shell side is low-temperature fluid, and the inlet temperature of the fluid is lower than the phase-change temperature of the phase-change material in the coil pipe.
Preferably, the cryogenic fluid medium may be ammonia, methane, nitrogen, or the like.
The outer wall of the cylinder body is wrapped with a heat insulation layer made of heat insulation materials.
The tubing of the coil and the plates of the baffles may be non-uniform, ranging from carbon steel, stainless steel, steel and steel alloys, aluminum and aluminum alloys, copper and copper alloys, and other specialty metals.
Compared with the prior art, the invention has the following advantages:
1. compared with other cold storage media, the latent heat type phase change material has the advantages of high cold storage density, proper cold storage temperature and good adaptability to cold load change. In the same temperature range, the cold storage capacity of the material is larger than the sensible heat of water, compared with ice cold storage, the material has the advantage of keeping fluidity, and meanwhile, the phase change material has wide sources, better thermal stability and chemical stability, safety and reliability, and can be repeatedly used.
2. The vortex coil pipe has compact structure and easy installation, compared with the conventional circular pipe, the vortex coil pipe has large filling amount and large heat exchange area, and the special structure can lead the inside to generate secondary flow, thereby strengthening the heat exchange between fluid in the pipe and the pipe wall and improving the utilization rate of cold energy.
3. The device has simple structure and convenient manufacture. The center tube is inserted into the supporting frame on one side close to the end socket and is of a detachable structure, so that the center tube can be easily inserted into or pulled out of the shell. Meanwhile, when the temperature difference between the phase change material and the low-temperature fluid is large, the central tube can freely stretch and retract along the axial direction, and the temperature difference stress is completely eliminated.
4. The baffle plate is arranged in the device, so that the flow direction of fluid can be controlled, the fluid can continuously flow in a direction changing along the axial direction, the turbulence degree can be further increased, and the heat exchange coefficient is improved.
5. The coil pipe group can be used as a unit during installation, and the installation is convenient. Meanwhile, the number of the required coil pipes can be increased or reduced according to the actual requirement of cold storage capacity, and the application range is wide.
6. The available pipes and plates are wide, and mainly comprise carbon steel, stainless steel, steel and steel alloy, aluminum and aluminum alloy, copper and copper alloy and other special metals.
7. The cryogenic fluid enters from the inlet pipe, flows back through the pipe orifice of the central pipe close to the side of the sealing head after changing the direction of the movement along the axial direction, and is finally discharged from the outlet pipe, so that the heat exchange time of the cryogenic fluid and the phase-change material in the cold storage device is greatly prolonged.
8. Use backing ring welding between coil pipe circle and the circle, on the one hand can be with coil pipe monolithic stationary, on the other hand can be through adjusting the interval between the adjacent coil pipe of backing ring thickness control, is the effective means of control coil pipe pitch and interval.
Drawings
FIG. 1 is a schematic plan view of a phase change cold storage device with a spiral coil according to the present invention.
Fig. 2 is a perspective view of the phase change cold storage device with the spiral coil according to the present invention.
Fig. 3 is a schematic structural view of a baffle plate in the phase-change heat-storage device with the spiral coil according to the present invention.
Fig. 4 is a schematic view of the phase change heat storage device with a spiral coil according to the present invention, in which the center tube has a double tube structure.
FIG. 5 is a schematic diagram of a support frame structure of the phase change cold storage device with the spiral coil according to the present invention.
FIG. 6 is a schematic view of the spiral coil structure of the phase change cold storage device with the spiral coil according to the present invention.
FIG. 7 is a schematic view of a backing ring of the phase change cold storage device with a spiral coil according to the present invention.
In the figure: 1-an inlet pipe; 2-an outlet pipe; 3, a tube plate; 4, baffle plate; 5-vortex coil pipe; 6, a cylinder body; 7-a central tube; 8, a support frame; 9, sealing the head; 10-a saddle; 11-an outer tube; 12-inner tube; 13-an annular tube sheet; 14-a fin; 15-a sleeve; 16-rib plate; 17-a filler strip; 18-a backing ring; 19-a support ring; 20-base furring strip; 21-coil pipe.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. These drawings are simplified schematic drawings and illustrate the basic structure of the invention in a schematic manner only.
As shown in fig. 1 and 2, the phase change cold storage device with the spiral coil of the present embodiment includes an inlet pipe 1, an outlet pipe 2, a pipe plate 3, a cylinder 6, a central pipe 7, a support frame 8, a seal head 9, a saddle 10, and a baffle 4 and a spiral coil 5 mounted on the central pipe 7; a plurality of vortex-shaped coil pipes 5 are arranged between the baffle plate 4 and the baffle plate 4, and the number of the vortex-shaped coil pipes can be determined according to the actual cold storage capacity; the baffle plate 4 can change the flow direction of the low-temperature fluid in the shell pass to strengthen heat transfer; the tube plate 3 is welded with the cylinder 6, the lower end position and the central position of the tube plate 3 are respectively provided with holes, and the inlet tube 1 and the outlet tube 2 are welded for the inlet and the outlet of the low-temperature fluid; the cryogenic fluid medium may be methane, ammonia, nitrogen, etc. and has an inlet temperature below the phase change temperature of the phase change material in coil 21; one end of a central tube 7 is fixed on the tube plate 3, and the other end is inserted on a support frame 8 welded with the cylinder 6; the central tube 7 can be a single tube or a double-tube structure;
as shown in fig. 3, the baffle plate 4 is provided with a hole in the center and is integrally in an arc shape or a disc-ring shape; the spacing between the baffles 4 can be determined according to the properties of the medium, the flow rate and the size of the device, and is generally not less than one fifth of the length of the cylinder, and the size of the central opening can be determined according to the diameter of the central pipe 7; the outer wall of the cylinder body 6 is wrapped with a heat insulation layer made of heat insulation materials.
As shown in fig. 4, when the central tube 7 is a double-tube structure, it mainly includes an outer tube 11, an inner tube 12, an annular tube plate 13, and fins 14 nested between the inner tube 12 and the outer tube 11; the phase-change material is filled between the inner tube 12 and the outer tube 11, and the fins 14 can be round fins, spiral fins, corrugated fins, pin fins and the like; the low-temperature fluid flows back through the central pipe 7, so that the heat exchange time of the low-temperature fluid and the phase-change material in the cold storage device is greatly prolonged, and the heat exchange efficiency is improved;
as shown in fig. 5, the support frame 8 is composed of a sleeve 15 and support rib plates 16, the number of the rib plates 16 can be determined according to actual conditions, and the diameter of the sleeve 15 is slightly larger than that of the central pipe 7; the support rib plate 16 is welded on the cylinder body 6 and used for supporting the central pipe 7; one side of the central tube 7 close to the end socket 9 is sleeved on the sleeve 15, and the central tube is of a detachable structure, so that the central tube can be easily inserted into or pulled out of the shell, and meanwhile, when the temperature difference between the phase-change material and the low-temperature fluid is large, the central tube 7 can freely stretch out and draw back along the axial direction, and the temperature difference stress is completely eliminated.
As shown in fig. 6 and 7, the spiral coil 5 is composed of a backing strip 17, a backing ring 18, a support ring 19, a base backing strip 20, and a coil 21. The outer diameter of the coil 21 can be phi 19mm, phi 25mm, phi 32mm and other common heat exchange tube sizes; two ends of the coil 21 are blocked, and the coil contains a phase-change material; the phase change material can be selected according to the temperature range of applicationAlternatively, organic phase change materials such as octanoic acid, nonanoic acid, decanoic acid, dodecanol, tert-amyl alcohol, ethylene glycol, n-dodecane, n-tetradecane, n-pentadecane and n-hexadecane, or Na2SO4·10H2O、Ge1Sb2Te4The inorganic phase change material can also be a composite phase change material consisting of two or more materials; the phase-change material has the advantages of high cold storage density, proper cold storage temperature, good adaptability to cold load change, wide source, good thermal stability and chemical stability, safety, reliability and repeated use; backing rings 18 are welded among 21 circles of the coil pipe, and the thickness of the backing rings 18 can be determined according to actual conditions and is generally 1-5 mm;
the inner ring of the coil pipe 21 is uniformly distributed and fixed by 4 backing rings 18 and is spot-welded on the supporting ring 19, and then the backing rings 18 are welded one by one along the radial direction by taking the backing rings as a substrate; after the coil pipe 21 is wound for a plurality of circles, the backing strips 17 are uniformly distributed among the backing rings 18 and used as added bases, the backing rings 18 are continuously spot-welded in the next circle, and the backing rings 18 are finally distributed radially in a stepwise increasing mode along the plane; the position and the number of the cushion strips 17 can be determined according to the overall size of the spiral coil 5; the pad strip 17 is flat and straight, and the thickness of the pad strip is consistent with that of the pad ring 18; the inner diameter of the supporting ring 19 is the same as the outer diameter of the central tube 7, the thickness of the supporting ring is consistent with that of the backing ring 18, and the length of the supporting ring is slightly larger than the outer diameter of the coil 21; a gap between the support ring 19 and the inner ring of the coil pipe 21 needs to be lined with a base gasket strip 20, and the thickness of the base gasket strip 20 needs to be determined by combining the outer diameter of the coil pipe 21; the tubing and sheet materials may be non-uniform and include carbon steel, stainless steel, steel and steel alloys, aluminum and aluminum alloys, copper and copper alloys, and other specialty metals.
The phase change cold storage device with the vortex coil pipe provided by the invention has the advantages of compact structure, high efficiency, reliability and wide application range. When the low-temperature fluid flows in the shell pass, the fluid can periodically flow in a direction-changing way under the influence of the baffle plate, so that the turbulence degree is increased, and the heat exchange coefficient is improved. Meanwhile, the special structure of the vortex coil pipe can improve the filling amount of the phase-change material on one hand, and can enable the internal fluid to generate secondary flow on the other hand, so that the heat exchange between the fluid in the pipe and the pipe wall is enhanced. In addition, the low-temperature fluid returns through the central pipe, so that the heat exchange time of the low-temperature fluid and the phase-change material in the cold storage device is greatly prolonged, and the heat exchange efficiency is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a cold device is stored up in phase transition with vortex coil pipe which characterized in that: the pipe plate comprises an inlet pipe (1), an outlet pipe (2), a pipe plate (3), a baffle plate (4), a vortex-shaped coil pipe (5), a cylinder body (6), a central pipe (7), a support frame (8), an end socket (9) and a saddle (10), wherein the pipe plate (3) is fixedly connected with the cylinder body (6), the lower end position and the central position of the pipe plate (3) are respectively provided with holes, the inlet pipe (1) and the outlet pipe (2) are respectively connected with the holes at the lower end position and the central position of the pipe plate (3), the baffle plate (4) and the vortex-shaped coil pipe (5) are arranged on the central pipe (7), one end of the central pipe (7) is fixed on the pipe plate (3), the other end of the central pipe is inserted on the support frame (8) connected with the cylinder body (6), the end socket (9) is connected with the cylinder body (6) and is arranged at the other side opposite to, the saddle (10) is arranged below the barrel (6).
2. The phase change cold storage device with the spiral coil as claimed in claim 1, wherein: the number of the baffle plates (4) is N, N is more than or equal to 2, M vortex-shaped coil pipes (5) are arranged between every two baffle plates (4), and M is more than or equal to 4; the center of the baffle plate (4) is provided with a hole, and the whole baffle plate is in an arc shape or a disc-ring shape; the size of the central opening is adapted to the diameter of the central tube (7).
3. The phase change cold storage device with the spiral coil as claimed in claim 1, wherein: vortex coil pipe (5) are including filler strip (17), backing ring (18), support ring (19) and coil pipe (21), welding backing ring (18) between coil pipe (21) circle and the circle, coil pipe (21) inner circle equipartition is fixed to be set up 4 backing ring (18) and spot welding and is in on support ring (19) set up filler strip (17) along the circumference equipartition between backing ring (18), backing ring (18) are the radial distribution that the level increases gradually at last along the plane, and the thickness of backing ring (18) is 1 ~ 5 mm.
4. The phase change cold storage device with the spiral coil as claimed in claim 3, wherein: two ends of the coil pipe (21) are plugged, and the coil pipe contains a phase-change material; a base gasket strip (20) is lined at the gap between the support ring (19) and the inner ring of the coil pipe (21), and the thickness of the base gasket strip (20) is adapted to the outer diameter of the coil pipe (21); the filler strip (17) is straight, and the inner diameter of the support ring (19) is the same as the outer diameter of the central pipe (7); the thickness of the supporting ring (19) is the same as that of the filler strip (17) and the filler ring (18), and the length is slightly larger than the outer diameter of the coil pipe (21).
5. The phase change cold storage device with the spiral coil as claimed in claim 1, wherein: the central pipe (7) is of a single-pipe or double-pipe structure; when the central tube (7) is of a double-tube structure, the central tube comprises an outer tube (11), an inner tube (12), an annular tube plate (13) and fins (14) nested between the inner tube (12) and the outer tube (11); and a phase change material is filled between the inner pipe (12) and the outer pipe (11).
6. The phase change cold storage device with the spiral coil as claimed in claim 5, wherein: the fins (14) are round fins, spiral fins, corrugated fins or pin fins.
7. The phase change cold storage device with the spiral coil as claimed in claim 1, wherein: the supporting frame (8) is composed of a sleeve (15) and a supporting rib plate (16), and the diameter of the sleeve (15) is slightly larger than that of the central pipe (7).
8. The phase change cold storage device with the spiral coil as claimed in claim 1, wherein: the outer wall of the cylinder body (6) is wrapped with a heat insulation layer made of heat insulation materials.
9. The phase change cold storage device with the spiral coil as claimed in claim 4, wherein: the phase change materials in the coil pipe (21) and the central pipe (7) are organic phase change materials, inorganic phase change materials or composite phase change materials; the organic phase change material is octanoic acid, nonanoic acid, decanoic acid, dodecanol, tertiary amyl alcohol, ethylene glycol, n-dodecane, n-tetradecane, n-pentadecane or n-hexadecane, and the inorganic phase change material is Na2SO4·10H2O or Ge1Sb2Te4。
10. The phase change cold storage device with a spiral coil as claimed in claim 9, wherein: the fluid in the apparatus is a cryogenic fluid having an inlet temperature below the phase change temperature of the phase change material in the coil (21) and the central tube (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020020852.8U CN211651305U (en) | 2020-01-07 | 2020-01-07 | Phase change cold storage device with vortex coil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN111102860A (en) * | 2020-01-07 | 2020-05-05 | 南京工业大学 | Phase change cold storage device with vortex coil pipe |
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