CN219674488U - Tower type solar heat absorption pipe with enhanced heat transfer component and heat absorber - Google Patents
Tower type solar heat absorption pipe with enhanced heat transfer component and heat absorber Download PDFInfo
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- CN219674488U CN219674488U CN202320221417.5U CN202320221417U CN219674488U CN 219674488 U CN219674488 U CN 219674488U CN 202320221417 U CN202320221417 U CN 202320221417U CN 219674488 U CN219674488 U CN 219674488U
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 115
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims description 8
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 6
- 150000003839 salts Chemical class 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of heat exchange, and particularly relates to a tower type solar heat absorption pipe with a reinforced heat transfer component and a heat absorber, wherein the heat absorption pipe comprises a heat absorption pipe body and a reinforced heat transfer component, the reinforced heat transfer component is arranged inside the heat absorption pipe body and is coaxial with the heat absorption pipe body, and the reinforced heat transfer component comprises a strip-shaped structure; the width and the length of the strip-shaped structure are respectively matched with the inner diameter and the height of the heat absorption tube; the ribbon structure is twisted around the heat absorption tube in the extending direction; the strip structure of the utility model enhances the transverse disturbance of the heat absorbing working medium in the heat absorbing pipe, reduces the temperature non-uniformity of the heat absorbing working medium on the cross section of the heat absorbing pipe caused by the solar radiation received by the single side of the heat absorbing pipe, improves the overall heat absorbing capacity of the heat absorbing pipe, improves the temperature uniformity of the heat absorbing working medium in the heat absorbing pipe, drives the reduction of the metal temperature gradient on the cross section of the pipe body of the heat absorbing pipe, reduces the temperature difference stress and deformation of the heat absorbing pipe, improves the operation safety of the heat absorber and reduces the light leakage rate.
Description
Technical Field
The utility model belongs to the technical field of heat exchange, and particularly relates to a tower type solar heat absorption pipe with an enhanced heat transfer component and a heat absorber.
Background
The heat absorber of the tower type solar photo-thermal power station is one of important equipment of the power station, and directly converts solar energy captured, reflected and focused by a heliostat into high-temperature heat energy which can be efficiently utilized, and provides a required heat source or power source for a generator set, so that the solar thermal power generation process is realized.
The heat absorber of the tower type solar photo-thermal power station is formed by a plurality of rows of vertical heat absorbing pipes which are closely distributed on the surface of the heat absorber in a mode of being perpendicular to the ground, and a heat transfer medium flows through the inside of the heat absorbing pipes to absorb heat through convection heat transfer. The heat absorption pipe of the tower type solar heat absorber is generally vertically and parallelly arranged by selecting a plurality of straight pipe sections, the surfaces of the straight pipe sections are used for receiving the radiation of sunlight, heat is transferred to heat absorption working media flowing in the pipe, and two ends of the heat absorption pipe are connected to a reflux header through expansion bends, so that the continuous flow of the working media is realized. The current heat absorption tube generally adopts a hollow heat-resistant alloy light tube.
As shown in fig. 1 and 2, the tower type solar photo-thermal heat absorber is formed by assembling a plurality of tube panel modules a, and each tube panel module a comprises an upper header B, a lower header C, a heated tube group D, a fixed tube clamp, a supporting device and a rigid frame. The heated tube groups D are closely distributed and arranged in a mode of being perpendicular to the ground by a plurality of rows of heat absorption tubes E, the heat absorption tubes E are straight tubes, and heat transfer medium flows through the inside of the heat absorption tubes E to absorb heat through convection heat transfer. The two ends of each heat absorption pipe E are fixedly connected with the expansion elbow F in a welding mode, a plurality of welded heat absorption pipes E and expansion elbows F are closely arranged according to design requirements, and an upper header B and a lower header C are fixedly communicated with the expansion elbows F at the two ends of the welded heated pipe group D respectively.
The heat absorber is provided with a heat absorbing surface for absorbing solar radiant energy on the outer side and a heat insulating surface contacted with a heat insulating material on the inner side, and the heat transfer working medium of the tower type solar heat absorber is generally molten salt at present. Because the single side of the heat absorption pipe is irradiated by solar radiation, in the operation process of the heat absorber, the metal of the pipe wall of the heat absorption pipe forms a larger temperature gradient on the cross section, and the temperature of the working medium in the heat absorption pipe gradually decreases from the heat absorption surface to the heat insulation surface. The temperature non-uniformity distribution is more obvious when the flow velocity of the working medium is reduced under the working condition of low load of the heat absorber. Because the temperature of the working medium is unevenly distributed, the working medium close to the heat insulation surface of the heat absorption tube cannot be sufficiently heated, and the overall heat transfer coefficient of the heat absorber is reduced; the heat absorption tube is bent and deformed to one side due to the existence of the metal temperature gradient on the tube wall of the heat absorption tube, so that the gap between the heat absorption tube and the adjacent heat absorption tube is increased, the light leakage rate is increased, and the temperature difference bending stress of the heat absorption tube is increased.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a tower type solar heat absorption pipe with a reinforced heat transfer component and a heat absorber, wherein a torsion structure in the tower type solar heat absorption pipe is provided with a transverse disturbance of a heat absorption working medium in the reinforced heat absorption pipe, so that the temperature non-uniformity of the heat absorption working medium on the cross section of the heat absorption pipe caused by solar radiation received by a single side of the heat absorption pipe is reduced, and the overall heat absorption capacity of the heat absorption pipe is improved; meanwhile, the temperature uniformity of the heat absorbing working medium in the heat absorbing pipe is improved, the metal temperature gradient on the cross section of the pipe body of the heat absorbing pipe is driven to be reduced, the temperature difference stress and deformation of the heat absorbing pipe are reduced, the operation safety of the heat absorber is improved, and the light leakage rate is reduced.
In order to achieve the above purpose, the technical scheme adopted by the utility model provides a tower type solar heat absorption pipe with an enhanced heat transfer component, wherein the tower type solar heat absorption pipe comprises a heat absorption pipe body and the enhanced heat transfer component, the enhanced heat transfer component is arranged inside the heat absorption pipe body and is coaxial with the heat absorption pipe body, and the enhanced heat transfer component comprises a strip-shaped structure;
the ribbon structure is twisted about the tower solar absorber tube axis in its direction of extension.
Further, the width of the strip structure is matched with the inner diameter of the tower type solar heat absorption pipe, and the length of the strip structure is matched with the height of the tower type solar heat absorption pipe.
Further, the pipe orifices at the two ends of the heat absorption pipe body are connected with expansion elbows of the heat absorber;
the reinforced heat transfer component adopts a metal belt, and two ends of the metal belt are fixedly connected with the inner wall of the heat absorption pipe body.
Further, the thickness of the metal belt is 0.6mm-1mm.
Further, the torsion pitch of the metal belt is 3-5 times of the inner diameter of the heat absorption pipe body.
Further, the heat absorbing pipe body has a straight pipe structure.
Further, the metal belt adopts oxidation and corrosion resistant materials with high temperature resistant working media.
The heat absorber is formed by assembling a plurality of tube panel modules, and each tube panel module comprises an upper header, a lower header, a heated tube group, an expansion elbow and a rigid frame;
the heat receiving pipe group is formed by arranging a plurality of rows of heat absorbing pipes side by side, and the heat absorbing pipes adopt the tower type solar heat absorbing pipe with the reinforced heat transfer component;
the two ends of each heat absorption pipe are fixedly connected with expansion elbows respectively, a plurality of welded heat absorption pipes and the expansion elbows are tightly arranged according to a preset arrangement mode, the upper header and the lower header are respectively communicated and fixed with the expansion elbows at the two ends of the welded heated pipe group, and the assembled upper header, lower header, heated pipe and expansion elbows are fixedly arranged on the rigid frame.
It should be noted that, the matching of the width and the height of the ribbon structure with the heat absorbing tube in this patent means that the ribbon structure and the ribbon structure are suitable for being accommodated inside the tower type solar heat absorbing tube.
The beneficial effects of the utility model are as follows:
the heat absorption tube is internally provided with the reinforced heat transfer component, the width and the height of the reinforced heat transfer component are respectively matched with the inner diameter and the height of the heat absorption tube, when the heat absorption working medium flows through the heat absorption tube with the reinforced heat transfer component at the same speed, compared with a hollow light tube, the heat absorption working medium is transversely disturbed by the reinforced heat transfer component, the uneven distribution of the temperature of the heat transfer working medium on the cross section of the heat absorption tube is greatly reduced, the heat transfer coefficient of the heat absorber on a heat absorption surface is improved by 12.2-14.6%, the total heat absorption capacity of the heat absorber is obviously improved, and a design space is provided for bearing the heat absorber with higher heat flow density and higher heat absorption capacity. The temperature uniformity of the heat absorption working medium in the heat absorption pipe is improved, the reduction of the metal temperature gradient on the cross section of the heat absorption pipe is driven, the temperature difference stress is reduced, the apparent maximum deformation of the heat absorption pipe is reduced from 4.5mm to 2.8mm, the light leakage rate is reduced, and the operation safety of the heat absorber is improved.
Drawings
FIG. 1 is a perspective view of a first heat sink in a prior art application scenario;
fig. 2 is a second perspective view of a heat absorber in the application scenario of the prior art;
FIG. 3 is a schematic view of the overall structure of the tower solar absorber tube of the present utility model;
fig. 4 is a schematic diagram of a tower solar absorber tube of the present utility model receiving solar radiation on one side.
Wherein, the A-tube panel module; b-upper header; c-a lower header; d-a heated tube group; e-a heat absorbing pipe; f-expanding elbow; 1-a heat absorption pipe body; 2-metal belt.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 3, the present embodiment provides a tower type solar heat absorbing pipe with an enhanced heat transfer member, which includes a heat absorbing pipe body 1 and a metal belt 2.
The heat absorption pipe body 1 is of a straight pipe structure; the two ends of the metal belt 2 are fixed with the inner wall of the heat absorption pipe body 1 in a welding mode. The single side of the heat absorption pipe body 1 is irradiated by sunlight, the metal belt 2 is used for guiding and transmitting heat absorption working medium in the heat absorption pipe body 1, so that the transverse disturbance of the heat absorption working medium in the heat absorption pipe body 1 is increased, and the uniform distribution of the temperature of the heat transmission working medium on the cross section of the heat absorption pipe body 1 is improved.
The metal belt 2 is a torsion strip-shaped structure, the thickness of the torsion strip-shaped structure is 0.6mm-1mm, the width of the torsion strip-shaped structure is matched with the inner diameter of the heat absorption pipe body 1, and the width of the torsion strip-shaped structure is slightly smaller than the inner diameter of the heat absorption pipe body 1; the torsion pitch is 3-5 times of the inner diameter of the heat absorption pipe body 1, the metal belt 2 is made of oxidation and corrosion resistant materials with high temperature resistant working media, the length of the metal belt 2 is matched with the height of the heat absorption pipe body 1, and the length of the metal belt is smaller than or equal to the height of the heat absorption pipe body 1.
In the present embodiment, the metal strip 2 is made of S31609 or S34779, and in other embodiments, the metal strip 2 can be made of an oxidation and corrosion resistant material such as S30409, S32169, NS336 and other high temperature resistant working substances.
The utility model provides a heat absorber which is formed by assembling a plurality of tube panel modules, wherein each tube panel module comprises an upper header, a lower header, a heated tube group, an expansion elbow and a rigid frame. The heat receiving pipe group is formed by closely distributing and arranging a plurality of rows of heat absorbing pipes in a mode of being perpendicular to the ground, the heat absorbing pipes are straight pipes, and heat transfer medium flows through the inside of the heat absorbing pipes to absorb heat through convection heat transfer. The two ends of each heat absorption pipe are fixedly connected with expansion elbows in a welding mode, a plurality of welded heat absorption pipes and expansion elbows are closely arranged according to design requirements, an upper header and a lower header are respectively communicated and fixed with the expansion elbows at the two ends of the welded heated pipe group, and the assembled upper header, lower header, heat absorption pipes and expansion elbows are fixedly arranged on a rigid frame.
The heat absorbing pipe of the heat absorber in the embodiment is the tower type solar heat absorbing pipe with the enhanced heat transfer component, and pipe orifices at two ends of the heat absorbing pipe body 1 are communicated with expansion bends in a welding way.
As shown in fig. 4, the horizontal arrow indicates that solar energy is radiated on one side of the heat absorbing tube, the side is a heat absorbing surface for absorbing the energy of solar energy radiation, and the other side opposite to the heat absorbing surface is a heat insulating surface with heat insulating materials; the vertical arrow indicates the conduction direction of the heat absorbing working medium, and the heat absorbing working medium is arranged in the heat absorbing pipe.
In this embodiment, the endothermic working medium is molten salt.
In one embodiment, the inner diameter of the heat absorption tube body 1 is 29.5mm, and the heat absorption tube body 1 is made of NS336 material; the metal belt 2 is made of S31609 material, the metal belt 2 is of a twisted belt-shaped structure, and is fixedly arranged on the inner wall of the heat absorption pipe body 1 through an end spot welding mode.
The thickness of the metal belt 2 is 0.8mm, the width is 28mm, the torsion pitch of the metal belt 2 is 4 times of the inner diameter of the heat absorption pipe, and the torsion pitch is 120mm.
The size of the metal belt 2 can enable the metal belt 2 to be installed inside the heat absorption pipe body 1 without affecting the flow resistance of heat absorption working media, meanwhile, when molten salt flows in the heat absorption pipe body 1, the molten salt is blocked by the metal belt 2 to be forced to increase the transverse flow, so that the molten salt alternately flows through the heat absorption surface and the heat insulation surface of the heat absorption pipe body 1, the temperature uniformity of the heat absorption working media in the whole cross section inside the heat absorption pipe body 1 is improved, the heat absorption capacity of the heat absorption working media is fully utilized, and the total heat absorption capacity of the heat absorber is improved. The heat transfer coefficient of the heat absorber of the embodiment is improved by 12.2-14.6%, and the apparent maximum deformation of the heat absorbing pipe is reduced from 4.5mm to 2.8mm.
In another embodiment, the inner diameter of the heat absorbing pipe body 1 is 18.5mm, and the heat absorbing pipe body 1 is made of NS336 material; the metal belt 2 is of a torsion-shaped belt-shaped structure, and is made of S34779 material, and the metal belt 2 is fixedly arranged on the inner wall of the heat absorption pipe body 1 in a spot welding mode at the end part.
The thickness of the metal belt 2 is 0.6mm, the width is 17.2mm, the torsion pitch of the metal belt 2 is 4.3 times of the inner diameter of the heat absorption pipe, and the torsion pitch is 80mm.
The metal belt 2 is sized to enable the metal belt 2 to be installed inside the heat absorption pipe body 1 without affecting the flow resistance of heat absorption working media, meanwhile, when molten salt flows in the heat absorption pipe body 1, the molten salt is blocked by the metal belt 2 to be forced to increase the transverse flow, so that the molten salt alternately flows through the heat absorption surface and the heat insulation surface of the heat absorption pipe body 1, the temperature uniformity of the heat absorption working media in the whole cross section inside the heat absorption pipe body 1 is improved, the heat absorption capacity of the heat absorption working media is fully utilized, and the total heat absorption capacity of the heat absorber is improved. Meanwhile, the metal temperature gradient on the cross section of the heat absorption pipe body 1 is reduced, the temperature difference stress and deformation of the heat absorption pipe are reduced, the operation safety of the heat absorber is improved, and the light leakage rate is reduced. The heat transfer coefficient of the heat absorber of the embodiment is improved by 12.2-14.6%, and the apparent maximum deformation of the heat absorbing pipe is reduced from 4.5mm to 2.8mm.
The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The tower type solar heat absorption pipe with the enhanced heat transfer component is characterized by comprising a heat absorption pipe body (1) and the enhanced heat transfer component, wherein the enhanced heat transfer component is arranged inside the heat absorption pipe body (1) and is coaxial with the heat absorption pipe body (1), and the enhanced heat transfer component comprises a strip-shaped structure;
the ribbon structure is twisted about the tower solar absorber tube axis in its direction of extension.
2. The solar tower absorber pipe with enhanced heat transfer means of claim 1, wherein the width of the ribbon structure matches the inside diameter of the solar tower absorber pipe and the length of the ribbon structure matches the height of the solar tower absorber pipe.
3. The tower type solar heat absorbing pipe with the enhanced heat transfer member according to claim 1, wherein the pipe openings at the two ends of the heat absorbing pipe body (1) are connected with expansion bends of a heat absorber;
the reinforced heat transfer component adopts a metal belt (2), and two ends of the metal belt (2) are fixedly connected with the inner wall of the heat absorption pipe body (1).
4. A tower solar heat absorber pipe with enhanced heat transfer means according to claim 3, wherein the thickness of the metal strip (2) is 0.6mm-1mm.
5. A tower solar heat absorber pipe with enhanced heat transfer member according to claim 3, wherein the twist pitch of the metal strip (2) is 3-5 times the inner diameter of the heat absorber pipe body (1).
6. A tower solar heat absorbing pipe with enhanced heat transfer means according to claim 1, wherein the heat absorbing pipe body (1) has a straight pipe structure.
7. A tower solar heat absorber pipe with enhanced heat transfer means according to claim 3, wherein the metal strip (2) is made of oxidation and corrosion resistant material with high temperature resistant working medium.
8. The heat absorber is characterized by being formed by assembling a plurality of tube panel modules, wherein each tube panel module comprises an upper header, a lower header, a heated tube group, an expansion elbow and a rigid frame;
the heat receiving pipe group is formed by arranging a plurality of rows of heat absorbing pipes side by side, and the heat absorbing pipes adopt the tower type solar heat absorbing pipe with the reinforced heat transfer component as set forth in any one of claims 1 to 6;
the two ends of each heat absorption pipe are fixedly connected with expansion elbows respectively, a plurality of welded heat absorption pipes and the expansion elbows are tightly arranged according to a preset arrangement mode, the upper header and the lower header are respectively communicated and fixed with the expansion elbows at the two ends of the welded heated pipe group, and the assembled upper header, lower header, heated pipe and expansion elbows are fixedly arranged on the rigid frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320221417.5U CN219674488U (en) | 2023-02-15 | 2023-02-15 | Tower type solar heat absorption pipe with enhanced heat transfer component and heat absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320221417.5U CN219674488U (en) | 2023-02-15 | 2023-02-15 | Tower type solar heat absorption pipe with enhanced heat transfer component and heat absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219674488U true CN219674488U (en) | 2023-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320221417.5U Active CN219674488U (en) | 2023-02-15 | 2023-02-15 | Tower type solar heat absorption pipe with enhanced heat transfer component and heat absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219674488U (en) |
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2023
- 2023-02-15 CN CN202320221417.5U patent/CN219674488U/en active Active
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