CN213362906U - Tower-type solar heat absorber of concave tube panel - Google Patents
Tower-type solar heat absorber of concave tube panel Download PDFInfo
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- CN213362906U CN213362906U CN202021831409.5U CN202021831409U CN213362906U CN 213362906 U CN213362906 U CN 213362906U CN 202021831409 U CN202021831409 U CN 202021831409U CN 213362906 U CN213362906 U CN 213362906U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The utility model discloses a tower solar heat absorber of concave type tube panel, including heat absorber tube panel and the distribution collection case and the collection case that collects that set up both ends about the heat absorber tube panel, the heat absorber tube panel is set up to the concave type heat absorption screen of concave surface by a plurality of sheets of sides of meeting light and encloses according to the circumference arrangement, and each concave type heat absorption screen mutual independence and each concave type is reserved between the heat absorption screen has the expansion gap between the screen. The utility model has the advantages of as follows: when the concave heat absorption screen has the same heating area, the external dimension of the heat absorber is smaller, which is beneficial to improving the comprehensive heat efficiency and reducing the engineering difficulty; the heat absorption surface is relatively larger under the condition that the overall dimension of the heat absorber is fixed, so that the focusing difficulty of a mirror field is favorably reduced, and the overflow of a control target is favorably reduced; the concave heat absorption screen can realize complete exchange, is simple and convenient to manufacture and install, has few field spare parts, can freely expand without additional thermal stress and does not deform when heated; the concave heat absorption screen can be integrally replaced, and the heat absorption pipes can be relatively independently overhauled and replaced.
Description
Technical Field
The utility model relates to a solar photothermal power's technical field, more specifically say, relate to a tower solar heat absorber of concave type tube panel.
Background
The light-gathering heat-collecting heat absorber (molten salt or water/steam) system is a core part in the light-gathering heat-collecting system of the tower-type solar photothermal power station, the heat absorber positioned at the top of the heat absorbing tower receives high-energy solar radiation from a light-gathering field in a heat receiving surface and transfers heat to a flowing medium in a heat absorbing pipe, and high-temperature molten salt or steam is produced at an outlet of the heat absorber. Tower type light condensation technology can realize up to 1200kW/m2The radiation heat flow density is over 1100 ℃, the theoretical heating temperature is over 1100 ℃, the operation condition of the heat absorber system is complex and severe, and the safety control requirement is high.
In a tower-type photothermal power plant, a large number of heliostats are required to focus solar heat onto a heat absorber for collecting solar energy. In different days and different time periods on the same day, the DNI (direct radiation) energy of sunlight and the optical efficiency of a heliostat are changed, and due to the influence of meteorological conditions such as cloud layers, wind speed, wind direction and the like, parameters such as the load and the temperature of a heat absorber are always in dynamic change, so that the heated tubes in the tube panel are not fixed mutually during structural design, the whole tube panel and a single heat absorbing tube can be ensured to freely expand in the vertical and width directions, otherwise, the heated tubes are easily seriously deformed and damaged, and the tube replacement operation during maintenance is not convenient.
The tower type solar heat absorber, whether the outer surface is heated or the cavity type inner surface is heated, the heating surface usually adopts a pipe wall type structure, i.e. the heat absorbing medium flows in the pipe, and the pipe is arranged into a plane or a circular arc surface. The heat dissipation loss of the exposed heating surface is large, the heat dissipation loss can be reduced by reducing the heating area in the design, but the heat flux density on the surface of the heat absorber is extremely high along with the reduction of the area, and the high heat flux density increases the metal wall temperature of the metal light-facing side of the heating surface and the film temperature of the working medium.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a tower solar heat absorber of the bigger and heat absorption pipe of heated area can freely expand, the heat absorption screen can independently be changed concave type tube panel under the definite condition of heat absorber appearance.
Therefore, the utility model provides a tower solar energy heat absorber of concave type tube panel, including heat absorber tube panel and the last collection case and the lower collection case of setting at heat absorber tube panel both ends, wherein, the heat absorber tube panel is set up to the concave type heat absorption screen of concave surface by a plurality of sheets of sides of meeting light and encloses according to the circumference arrangement, and each concave type heat absorption screen mutual independence and each concave type is reserved between the heat absorption screen and is had the expansion gap between the screen.
Furthermore, the tower-type solar heat absorber is an external surface heat-receiving type heat absorber which is integrally in a cylindrical structure, and the medium of the tower-type solar heat absorber is water/steam or molten salt.
Furthermore, the concave heat absorption screen is formed by closely arranging heat absorption pipes according to a preset concave curve to form a concave surface with a preset curvature radius, and each heat absorption pipe in the concave heat absorption screen is independently supported and fixed.
Furthermore, the heat absorption pipes in the heat absorber pipe panel are respectively connected with the upper header and the lower header at two ends through flexible connecting pipes, and the upper header and the lower header are arranged in groups or integrally.
Further, go up the collection case and all set up outside the effective heat absorption section of heat absorber tube panel and still set heat tracing unit and heat preservation protective unit with lower collection case and flexonics pipe.
Furthermore, 1-3 heat absorbing pipes on two sides of each concave heat absorbing screen are respectively supported by a sliding type heat absorbing pipe fixing unit in a sliding mode, the heat absorbing pipes between 1-3 heat absorbing pipes on two sides of each concave heat absorbing screen are respectively fixed by a pipe screen fixing unit, and the sliding type heat absorbing pipe fixing unit is rigidly connected with the pipe screen fixing unit.
Furthermore, the sliding type heat absorption tube fixing unit on the left side of the concave heat absorption screen is connected above or below the tube panel fixing unit, and the sliding type heat absorption tube fixing unit on the right side of the concave heat absorption screen is relatively connected below or above the tube panel fixing unit.
Further, one side of the tube panel fixing unit is connected with the heat absorbing tubes between 1-3 heat absorbing tubes on two sides of each concave heat absorbing panel through the heat absorbing tube fixing and connecting unit, and the other side of the tube panel fixing unit is connected with the steel framework of the tower-type solar heat absorber through the tube panel fixing and connecting unit, and the sliding type heat absorbing tube fixing unit is connected with 1-3 heat absorbing tubes on two sides of each concave heat absorbing panel through the heat absorbing tube sliding and connecting unit.
Further, the heat absorption pipe fixed connection unit allows the heat absorption pipes connected with the heat absorption pipe fixed connection unit to freely expand in the length and width directions of the heat absorber pipe panel when being connected with the heat absorption pipes.
Furthermore, the tower-type solar heat absorber is heated on one side, and a heat preservation protective layer is further arranged on the backlight side of the tube panel of the heat absorber.
The utility model discloses tower solar heat absorber of concave type tube panel has following advantage:
1) when the concave heat absorption screen has the same heating area, the overall dimension of the heat absorber is smaller, and the concave heating surface can reduce the heat dissipation and reflection loss, thereby being beneficial to improving the comprehensive heat efficiency and reducing the engineering difficulty;
2) the heat absorption surface is relatively larger under the condition that the overall dimension of the heat absorber is fixed, so that the focusing difficulty of a mirror field is favorably reduced, and the overflow of a control target is favorably reduced;
3) the concave heat absorption screen can realize complete exchange, is simple and convenient to manufacture and install, has few field spare parts, can freely expand without additional thermal stress and does not deform when heated;
4) the concave heat absorption screen can be replaced integrally, so that the maintenance time can be reduced, and the equipment availability ratio can be improved; meanwhile, the heat absorption pipes can be overhauled and replaced relatively independently, the workload is small, and other heat absorption pipes are not affected.
Drawings
Fig. 1 shows a schematic front view of a tower-type solar heat absorber of a concave tube panel according to an exemplary embodiment of the present invention.
Fig. 2 shows a schematic top view of a tower solar absorber with a concave tube panel according to an exemplary embodiment of the present invention.
Fig. 3 shows a schematic diagram of a partially enlarged structure of a concave heat absorption screen in a tower-type solar heat absorber of a concave tube panel according to an exemplary embodiment of the present invention.
Fig. 4A shows according to the utility model discloses exemplary embodiment's concave type heat absorption screen's mounting structure schematic diagram in the tower solar heat absorber of concave type pipe screen, and fig. 4B shows according to the utility model discloses exemplary embodiment's the mounting structure schematic diagram of adjacent concave type heat absorption screen in the tower solar heat absorber of concave type pipe screen, and fig. 4C shows according to the utility model discloses exemplary embodiment's the connecting structure schematic diagram of slidingtype heat absorption pipe fixed unit and pipe screen fixed unit in the tower solar heat absorber of concave type pipe screen, and fig. 4D shows according to the utility model discloses exemplary embodiment's the setting structure schematic diagram of expansion gap between the screen in the tower solar heat absorber of concave type pipe screen between adjacent concave type heat absorption screen.
Description of reference numerals:
1-concave heat-absorbing screen; 101 a/b-flexible connection tube; 102 a-upper header; 102 b-lower header; 103-a heat absorption tube; 2-tube panel fixing unit; 3 a/b-sliding type heat absorption tube fixing unit; 4 a/b/c-tube panel fixed connection unit; 5 a-a heat absorption pipe fixed connection unit; 5 b-a heat absorption tube sliding connection unit; 6-heat preservation and protection layer.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The utility model aims at providing a novel tower solar heat absorber guarantees that the free inflation of heat absorption screen and heat absorption pipe and change the maintenance facility when the heating area is great.
Fig. 1 shows a schematic front view structure diagram of a tower-type solar heat absorber of a concave tube panel according to an exemplary embodiment of the present invention, and fig. 2 shows a schematic top view structure diagram of a tower-type solar heat absorber of a concave tube panel according to an exemplary embodiment of the present invention.
As shown in fig. 1 and 2, according to an exemplary embodiment of the present invention, the tower-type solar heat absorber of the concave tube panel includes a heat absorber tube panel, and an upper header 102a and a lower header 102b provided at both ends of the heat absorber tube panel, and the headers at the upper and lower ends of the heat absorber tube panel function to collect or distribute a medium.
The utility model provides a heat absorber tube panel is met the light side by a plurality of and is set up to the concave type heat absorption screen 1 of concave surface and enclose according to the circumference arrangement, and each concave type heat absorption screen 1 mutual independence and each concave type heat absorption screen between 1 reservation have the expansion gap between the screen, specifically can confirm concave type heat absorption screen 1's quantity and heated area according to unit capacity size, then can constitute complete heat absorber tube panel according to the circumference arrangement.
Therefore, the light-facing side of the concave heat absorption screen 1 is set to be a concave surface, so that heat dissipation and reflection loss can be reduced, the comprehensive heat efficiency is improved, and the heat absorption surface of the heat absorption screen surrounded by the concave heat absorption screens can be relatively large under the condition that the overall dimension is fixed, so that the focusing difficulty of a mirror field is reduced, and the overflow of a control target is reduced. And, set up each concave type heat absorption screen 1 as mutual independence, reserve the expansion gap between the screen according to the performance requirement between each concave type heat absorption screen 1 for the heat absorber tube panel can be in the vertical and width direction freedom expansion, and be convenient for wholly change the tube panel, reduce maintenance time and improve equipment availability.
The utility model provides a tower solar heat absorber is preferably the surface heated type heat absorber that wholly is the cylindricality structure, and the medium that flows in the heat absorption pipe can be water/vapour or fused salt among the tower solar heat absorber.
According to the utility model discloses, the heat absorption pipe in the heat absorber pipe panel passes through flexonics pipe 101a/b and is connected with last header and lower header at both ends respectively, goes up header 102a and lower header 102b and sets up or wholly sets up in groups. Among them, the flexible connecting pipe 101a/b preferably adopts a bent pipe structure with a large curvature radius to reduce thermal stress and alleviate fatigue damage thereof. In addition, in order to facilitate the flexible transition of the flexible connecting pipes, the upper header 102a and the lower header 102b can be arranged in groups, and whether the grouped headers are communicated or not is determined by combining the inlet and outlet connecting pipes and the design of a process water path.
In addition, the upper header 102a and the lower header 102b and the flexible connecting pipes 101a/b are arranged outside the effective heat absorption section of the heat absorber tube panel, and a heat tracing unit and a heat preservation protection unit can be optionally arranged according to a heat transfer medium.
Fig. 3 shows a schematic diagram of a partially enlarged structure of a concave heat absorption screen in a tower-type solar heat absorber of a concave tube panel according to an exemplary embodiment of the present invention.
The utility model provides a concave type heat absorption screen 1 closely arranges the concave surface that forms to have predetermined curvature radius according to predetermined concave surface curve by heat absorption pipe 103, and each heat absorption pipe 103 in the concave type heat absorption screen 1 supports alone fixedly. Because each heat absorption pipe supports fixedly alone, can realize freely expanding and independently overhaul the change, work load is little and do not influence other heat absorption pipes.
Moreover, the tower-type solar heat absorber is heated on one side, and in order to prevent radiation light from entering the interior of the heat absorber, a heat preservation protective layer 6 is further arranged on the backlight side of the tube panel of the heat absorber.
Fig. 4A shows according to the utility model discloses exemplary embodiment's concave type heat absorption screen's mounting structure schematic diagram in the tower solar heat absorber of concave type pipe screen, and fig. 4B shows according to the utility model discloses exemplary embodiment's the mounting structure schematic diagram of adjacent concave type heat absorption screen in the tower solar heat absorber of concave type pipe screen, and fig. 4C shows according to the utility model discloses exemplary embodiment's the connecting structure schematic diagram of slidingtype heat absorption pipe fixed unit and pipe screen fixed unit in the tower solar heat absorber of concave type pipe screen, and fig. 4D shows according to the utility model discloses exemplary embodiment's the setting structure schematic diagram of expansion gap between the screen in the tower solar heat absorber of concave type pipe screen between adjacent concave type heat absorption screen.
In order to realize the fixed effect of more excellent installation, the utility model discloses it has different fixed units to press to have respectively with the pipe screen both sides between the screen. As shown in fig. 4A to 4C, 1 to 3 heat absorbing pipes on both sides of each concave heat absorbing panel are slidably supported by a sliding type heat absorbing pipe fixing unit 3a/3b, the heat absorbing pipes between 1 to 3 heat absorbing pipes on both sides of each concave heat absorbing panel are fixed by a tube panel fixing unit 2, and the sliding type heat absorbing pipe fixing unit 3a/3b is rigidly connected to the tube panel fixing unit 2.
That is, all the heat absorbing pipes between the panels share a set of tube panel fixing unit, and considering that the heat absorbing pipes (the number of which is determined according to the detailed structure) on both sides of the concave type heat absorbing panel have large thermal displacement in the width direction, a special sliding type heat absorbing pipe fixing unit 3a/3b is adopted for supporting and fixing, and the sliding type heat absorbing pipe fixing unit 3a/3b is rigidly connected with the middle tube panel fixing unit 2.
As shown in fig. 4D, preferably, the sliding type heat absorption tube fixing unit 3b on the left side of the concave heat absorption panel 1 is connected above or below the panel fixing unit 2, and the sliding type heat absorption tube fixing unit 3a on the right side of the concave heat absorption panel 1 is relatively connected below or above the panel fixing unit 2.
One side of the tube panel fixing unit 2 is connected with the heat absorbing tubes 103 between 1-3 heat absorbing tubes on two sides of each concave heat absorbing panel through the heat absorbing tube fixing and connecting unit 5a, and the other side of the tube panel fixing and connecting unit 4a/b/c is connected with a steel framework (not shown) of the tower-type solar heat absorber, so that the concave heat absorbing panel is fixedly connected with the whole heat absorber. And, the sliding type heat absorption tube fixing unit 3a/b is connected with 1-3 heat absorption tubes on both sides of each concave heat absorption screen through the heat absorption tube sliding connection unit 5b, for example, the sliding type heat absorption tube fixing unit 3a/b is a fixing member with a sliding slot, the heat absorption tube sliding connection unit 5b is a connecting member with a sliding head, and the sliding head is embedded in the sliding slot and can slide in the sliding slot under the driving of the heat absorption tube.
It is necessary to ensure that the heat absorbing pipe fixing and connecting unit 5a and the heat absorbing pipe 103 are connected while allowing the heat absorbing pipe connected therewith to freely thermally expand in the length and width directions of the heat absorber pipe panel, so that the heat absorbing pipe has no additional thermal stress and is not deformed when heated.
The present invention will be further described with reference to the following specific embodiments.
As shown in fig. 1 to 3, the tower-type solar heat absorber of the present embodiment is composed of 8 concave heat-absorbing panels 1 in total. The upper header 102a and the lower header 102b of the concave heat absorption screen 1 are divided into 2 groups, the heat absorption pipes 103 of a single concave heat absorption screen 1 are divided into 2 process water paths, and the grouped headers 102a/b are not required to be communicated but are respectively provided with inlet and outlet connecting pipes (not shown).
The heat absorbing pipes 103 in the concave heat absorbing screen 1 are high nickel-based small-caliber thin-walled pipes, and the heat absorbing pipes 103 are closely arranged according to a concave curve with the curvature radius of R4650. The heat absorption pipes 103 in the concave heat absorption screen 1 are connected with the header 102a/b by flexible connecting pipes 101a/b, and the flexible connecting pipes 101a/b are of bent pipe structures with large curvature radius. The header 102a/b and the flexible connecting pipe 101a/b are arranged outside the effective heat absorption section of the concave heat absorption screen 1 and carry out heat tracing and heat preservation protection.
Each 2 heat absorbing pipes on two sides of the concave heat absorbing screen 1 are supported by a sliding type heat absorbing pipe fixing unit 3a/b, all the other heat absorbing pipes between screens share the pipe screen fixing unit 2, the sliding type heat absorbing pipe fixing unit 3a/b is in rigid connection with the pipe screen fixing unit 2, the sliding type heat absorbing pipe fixing unit 3a/b on the left (right) side of the concave heat absorbing screen 1 is connected to the upper (lower) side of the pipe screen fixing unit 2, and the other side of the concave heat absorbing screen is arranged on the lower (upper) side of the pipe screen fixing unit 2.
One side of the tube panel fixing unit 2 is connected with the heat absorbing tubes 103 through the heat absorbing tube fixing and connecting unit 5a/b, the other side of the tube panel fixing unit is connected with a steel framework (not shown) through the tube panel fixing and connecting unit 4a/b/c, and finally the connection and fixation of the tube panel and the whole heat absorber are realized, and the heat absorbing tubes 103 connected with the heat absorbing tubes are allowed to freely expand in the length direction and the width direction of the concave heat absorbing panel 1 when the heat absorbing tube fixing and connecting unit 5a/b is connected with the heat absorbing tubes 103.
An expansion gap between the screens is reserved when the concave heat absorption screen 1 is installed, the heat preservation protective layer 6 is arranged on the backlight side of the concave heat absorption screen 1, and the simplicity of disassembly and assembly is also considered when the fact that radiation light is prevented from entering the interior of the heat absorber structure is considered.
According to theoretical calculation and pipe arrangement lofting, the overall dimension of the 50MW tower type solar heat absorber in the embodiment is reduced by about 6.6% compared with the sectional dimension of a conventional circumferential heat absorber, namely the circumferential section of the tower type solar heat absorber is reduced by about 1m, so that not only is the wind load calculation surface of the tower type solar heat absorber reduced, but also the sectional dimension of a heat absorption tower top platform can be reduced, and the civil engineering cost is saved.
The present invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification, and to any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. The tower type solar heat absorber is characterized by comprising a heat absorber tube panel, an upper header and a lower header, wherein the upper header and the lower header are arranged at two ends of the heat absorber tube panel, the heat absorber tube panel is formed by arranging a plurality of concave heat absorption panels with concave surfaces arranged on the light-facing sides according to the circumference, the concave heat absorption panels are mutually independent, and an inter-panel expansion gap is reserved between the concave heat absorption panels.
2. The tower-type solar heat absorber with the concave pipe panel according to claim 1, wherein the tower-type solar heat absorber is an external surface heat-receiving type heat absorber with an overall cylindrical structure, and the medium of the tower-type solar heat absorber is water/steam or molten salt.
3. The tower-type solar heat absorber with the concave tube panel according to claim 1, wherein the concave heat absorber panel is formed by closely arranging heat absorbing tubes according to a predetermined concave curve to form a concave surface with a predetermined curvature radius, and each heat absorbing tube in the concave heat absorber panel is independently supported and fixed.
4. The tower-type solar heat absorber with the concave tube panel according to claim 1 or 3, wherein the heat absorption tubes in the tube panel of the heat absorber are respectively connected with an upper header and a lower header at two ends through flexible connecting tubes, and the upper header and the lower header are arranged in groups or integrally.
5. The tower-type solar heat absorber with the concave tube panel according to claim 4, wherein the upper and lower headers and the flexible connecting tubes are arranged outside the effective heat absorption section of the heat absorber tube panel and are provided with a heat tracing unit and a heat preservation protection unit.
6. The tower-type solar heat absorber with the concave tube panel according to claim 1 or 3, wherein 1-3 heat absorbing tubes on two sides of each concave heat absorbing panel are respectively and slidably supported by a sliding-type heat absorbing tube fixing unit, and the heat absorbing tubes between 1-3 heat absorbing tubes on two sides of each concave heat absorbing panel are respectively fixed by a tube panel fixing unit, and the sliding-type heat absorbing tube fixing unit is rigidly connected with the tube panel fixing unit.
7. The tower-type solar heat absorber with the concave tube panel according to claim 6, wherein the sliding type heat absorbing tube fixing unit on the left side of the concave heat absorbing panel is connected above or below the tube panel fixing unit, and the sliding type heat absorbing tube fixing unit on the right side of the concave heat absorbing panel is oppositely connected below or above the tube panel fixing unit.
8. The tower-type solar heat absorber with the concave tube panels as claimed in claim 6, wherein one side of the tube panel fixing unit is connected with the heat absorbing tubes between 1-3 heat absorbing tubes on two sides of each concave heat absorbing panel through a heat absorbing tube fixing and connecting unit, and the other side of the tube panel fixing and connecting unit is connected with the steel framework of the tower-type solar heat absorber through a tube panel fixing and connecting unit, and the sliding-type heat absorbing tube fixing unit is connected with 1-3 heat absorbing tubes on two sides of each concave heat absorbing panel through a heat absorbing tube sliding and connecting unit.
9. The solar tower absorber according to claim 8, wherein the absorber tube fixing and connecting unit allows the absorber tubes connected thereto to freely expand in the length and width directions of the absorber tube panel when connected to the absorber tubes.
10. The tower-type solar heat absorber with the concave pipe panel according to claim 1, wherein the tower-type solar heat absorber is heated on one side, and a heat preservation protective layer is further arranged on the backlight side of the heat absorber pipe panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021831409.5U CN213362906U (en) | 2020-08-28 | 2020-08-28 | Tower-type solar heat absorber of concave tube panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021831409.5U CN213362906U (en) | 2020-08-28 | 2020-08-28 | Tower-type solar heat absorber of concave tube panel |
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| Publication Number | Publication Date |
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| CN213362906U true CN213362906U (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021831409.5U Active CN213362906U (en) | 2020-08-28 | 2020-08-28 | Tower-type solar heat absorber of concave tube panel |
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| CN (1) | CN213362906U (en) |
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- 2020-08-28 CN CN202021831409.5U patent/CN213362906U/en active Active
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