CN116294248A - Congruent surface non-imaging concentrating system based on solar vacuum tube absorber - Google Patents
Congruent surface non-imaging concentrating system based on solar vacuum tube absorber Download PDFInfo
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- CN116294248A CN116294248A CN202310110542.3A CN202310110542A CN116294248A CN 116294248 A CN116294248 A CN 116294248A CN 202310110542 A CN202310110542 A CN 202310110542A CN 116294248 A CN116294248 A CN 116294248A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/80—Arrangements for concentrating solar-rays for solar heat collectors with reflectors having discontinuous faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
- F24S10/45—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors the enclosure being cylindrical
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S2023/87—Reflectors layout
- F24S2023/876—Reflectors formed by assemblies of adjacent reflective elements having different orientation or different features
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Abstract
The invention discloses a congruent surface non-imaging light gathering system based on a solar vacuum tube absorber, which comprises a high-power non-imaging light gathering device, a solar vacuum tube and a supporting structure, wherein a groove is arranged on the supporting structure, the high-power non-imaging light gathering device is arranged in the groove, and the solar vacuum tube is arranged at the center of the high-power non-imaging light gathering device; the condensing system uses the congruent surface non-imaging condenser which does not need tracking and can flexibly adjust the working time to synchronously collect direct scattered radiation, and converts the collected solar radiation energy into useful energy to be supplied for running of different systems; the congruent surface non-imaging condensing system provided by the invention realizes the advantages of indiscriminate replacement of the condensing mirror surface during production and manufacture while realizing the comprehensive use of various systems without tracking dynamic adjustment and high-power condensing to generate high-temperature heat energy, and remarkably improves the adaptability of the condenser to weather and seasons during outdoor operation, thereby having more friendly engineering application potential.
Description
Technical Field
The invention belongs to the technical field of solar energy utilization, and particularly relates to a congruent surface non-imaging condensation system of a solar vacuum tube absorber.
Background
The prosperous development of civilization promotes people to repeatedly promote the life quality requirement, and the ecological pattern of environmental pollution and the storage pattern of energy sources become great barriers, so that the method can cope with two important challenges of energy shortage and incapacitation of environmental ecology. The method improves the main status of renewable energy in energy development, and increases the technical development and the energy supply of the renewable energy, which is a powerful solution to the problem of shortage of fossil energy, not only can efficiently reduce the demand for fossil energy, but also is helpful for reducing environmental pollution sources.
As renewable energy sources with huge reserves and wide distribution, the solar energy resources are reasonably and efficiently developed and utilized, and the method has remarkable economic benefit. However, due to the refraction of solar radiation energy through the atmosphere, the density of the solar radiation energy reaching the ground is low, and the solar heat utilization requirement in industry and agriculture is difficult to be effectively met. The geometrical light condensation method not only ensures that the solar radiation energy density is high and multiplied by length, but also can effectively expand the range of the absorber for collecting solar radiation energy, and further widens the application field of solar energy.
The tracking type solar concentrating system has the advantages of larger concentrating ratio, high heat collecting temperature and the like, but still has the problems of high tracking requirement, high construction cost and the like to be solved urgently.
Disclosure of Invention
In order to solve the problems of the conventional solar concentrating system, the invention constructs the congruent surface non-imaging concentrating system of the solar vacuum tube absorber based on the extreme light principle, realizes high-power concentrating of the non-imaging concentrator, synchronously collects direct solar radiation, has more stable energy collection process, effectively reduces heat loss in the operation process, ensures that the absorber is in a static operation state in the photo-thermal conversion process, is beneficial to reducing the risk of leakage of heat collecting working media, optimizes the system production and assembly links, reduces the construction cost and has better industrial production application prospect.
The invention solves the technical problems by adopting the scheme that:
a congruent surface non-imaging light gathering system based on a solar vacuum tube absorber comprises a high-power non-imaging light gathering device 1, a solar vacuum tube 2 and a supporting structure 3, wherein a groove is formed in the supporting structure 3, the high-power non-imaging light gathering device 1 is arranged in the groove, and the solar vacuum tube 2 is arranged in the center of the high-power non-imaging light gathering device 1.
The high-power non-imaging solar concentrator 1 consists of a plurality of full-isosurface flat-plate collecting surfaces 1-1, the full-isosurface flat-plate collecting surfaces 1-1 are symmetrically arranged by taking a solar vacuum tube 2 as a symmetry axis, and the full-isosurface flat-plate collecting surfaces are in combined action, when incident light rays are in a half-angle, the concentrator collects solar radiation energy collected by an optical port to an absorber of the solar vacuum tube 2 in high power, the absorber is conveyed to carry out photo-thermal conversion to obtain high-quality useful energy, and the high-power non-imaging solar concentrator 1 can all rotate based on the axial line direction of the solar vacuum tube, so that the high-power non-imaging solar concentrator can efficiently operate in daytime and collect solar light rays to the absorber of the solar vacuum tube 2, compared with the conventional non-imaging solar concentrator, the solar concentrator can collect more high-quality solar resources, so that the concentrating system has more friendly engineering application potential, and the non-imaging solar concentrator can collect direct scattered radiation synchronously, and further improve the solar radiation collecting capacity of an integrated system.
The supporting plates at the two ends of the supporting structure 3 are higher than the inner grooves, and the two ends of the solar vacuum tube 2 are placed on the supporting plates.
The four flat-plate collecting surfaces at the bottom of the high-power non-imaging condenser 1 form a W shape, and two V-shaped flat-plate collecting surfaces in the W shape are not connected to form a water outlet 1-2.
The solar vacuum tube 2 comprises an absorption inner tube 2-1 and a heat insulation outer tube 2-2, wherein the absorption inner tube 2-1 is arranged in the heat insulation outer tube 2-2.
The beneficial effects of the invention are as follows:
1. multiplication of condensing ratio of non-imaging condenser
Typically, non-imaging concentrators are used for low power concentration and are therefore difficult to popularize for industrial manufacturing. The invention has the optical characteristic of high-power condensation, improves the application potential and development prospect of the non-imaging solar condenser in industrial production, and can achieve reliable operation in the whole day.
2. Avoiding tracking of concentrator and solar co-frequency
The condensing system can highly collect solar radiation energy to the outer surface of the absorber in the receivable angle, avoids high-precision time-by-time adjustment of the condenser, remarkably improves the reliability of the tracking system, and can efficiently collect light rays even if the condensing system generates certain dynamic vibration, thereby effectively reducing the outdoor working risk of the condensing system.
3. Enhancing steady-state operation capability of heat collection process of system
Conventional high-power concentrating systems can concentrate energy to the absorber only when direct solar radiation can reach the ground, but the systems are required to face complex and variable weather conditions in practical engineering applications, resulting in poor stability of effective output of useful energy. The solar energy collecting system can synchronously collect direct solar radiation and scattered radiation aiming at sky radiation characteristics, and the sky scattered radiation exists in the whole day, is matched with the working characteristics of the light collecting system, can stably convey the solar radiation to the surface of an absorber, and has the capability of facing complex weather conditions.
4. Synchronous acquisition of direct scattered radiation
Typically high power solar concentrators can only collect direct radiation of sunlight, whereas in practice solar radiation contains scattered radiation in addition to direct radiation; when the solar concentrator is used for collecting sunlight, not only direct solar radiation but also certain solar scattered radiation can be collected, and the overall optical performance of the solar concentrator is optimized.
5. Static operation of the concentrator is beneficial to the supply of useful energy
The condensing system can rotate around the axis direction of the absorber, and the absorber can collect solar radiation energy statically only by integral movement when the system operates, so that the condensing system is beneficial to arranging a conveying channel for heat collecting working media. In addition, the long-term static operation of the heat collecting working medium channel is beneficial to reducing the local flow loss of the heat collecting working medium and reducing the leakage amount of fluid in the operation process.
6. Has more absorption surface to participate in light-heat conversion
In a high-power solar concentrating system, only a few absorption surfaces generally participate in a photo-thermal conversion process, and part of absorption surfaces are in an inactive or semi-active state for a long time, so that the surface of the absorber has obvious temperature gradient when in operation, and the steady-state operation of the absorber is influenced; the absorber of the invention almost takes part in the photo-thermal conversion process on the absorption surface when in operation, eliminates the temperature gradient on the surface of the absorber, is beneficial to the durable and efficient operation of a condensation system, and has more uniform and reliable heating process of the heat collecting working medium.
7. Avoiding the adverse effect of absorber thermal stress on the structure of the collecting surface
The traditional non-imaging solar system condenser and absorber are tightly connected with each other, the absorber for collecting solar radiation energy can generate heat and form certain thermal stress when the system is in operation, a condensing surface with lower temperature can be affected by the transmitted thermal stress, deformation and even damage of the surface type are easy to cause, and the optical performance of the whole system is reduced. The invention effectively separates the condenser and the absorber in space, has blocking effect on the thermal stress transferred from the absorber to the condenser, and is beneficial to avoiding the adverse effect caused by the thermal stress.
8. The condensing system is convenient to install and maintain
The invention can separate the condenser from the absorber, improves the interval allowing installation errors, and is beneficial to constructing a large-scale system platform; in view of maintenance problems after system installation, the system can be solved by partial disassembly and secondary installation under the condition that only damaged collecting surfaces are exchanged.
9. Avoiding the influence of effusion of the condensing system in practical application
The condensing surface of the conventional non-imaging condenser is produced integrally without gaps, the structure at the bottom of the condensing surface is separated to reserve the water outlet, adverse effects of snow, accumulated water, dust and the like caused by weather factors can be effectively eliminated, adaptability to complex and changeable environmental conditions is improved, stability of engineering application is improved, and the overall layout requirement of a condensing system is met.
10. Reducing heat conduction loss of integrated system
In conventional non-imaging solar systems, the concentrator and absorber are interconnected, resulting in heat transfer between the heated absorber and the concentrator, and hence heat loss from the system; the condenser is separated from the absorber, and a partial vacuum interlayer is arranged between the condenser and the absorber, so that the heat conduction loss is negligible.
11. Avoiding rapid aging of the reflective coating of the collecting surface
Because the condenser and the absorber are separated from each other, the absorber is difficult to transfer heat energy into the condenser after being heated, so that the problem of heat aging of the reflective coating of the condensing surface is effectively solved, and the reduction of the optical efficiency of the system caused by the problem is avoided.
12. Easy industrial transportation dispatch
The condensing surface of the conventional non-imaging condenser is mainly arc-shaped, and the condensing surface of the invention is composed of a plurality of pairs of congruent flat reflecting surfaces, thereby avoiding adverse effects caused by collision and vibration of the integrated surface during production and transportation, and reducing transportation cost such as fixation, vibration prevention or interval protection.
13. Is beneficial to reducing the convection and radiation heat loss of the system
The absorber is positioned in the lighting opening of the condenser, the average wind speed flowing through the surface of the absorber is reduced when the absorber works due to the protection of the condenser, the convection heat loss of the outer surface of the absorber is reduced, and the angular coefficient of the absorber to the sky is also reduced due to the fact that the absorber is positioned in the lighting opening of the condenser, so that the radiation heat loss to the surrounding environment is synchronously reduced.
14. Beneficial to lowering the center of gravity of an integrated system
The main components of the total mass of the solar concentrating system are mainly divided into the dead weight of the absorber and the heat collecting working fluid loaded in the absorber, and the absorber is coupled in the lighting port of the concentrator, so that the gravity center of the whole system is effectively lowered on the whole, the fluctuation or shaking of the system during operation is reduced, and the wind resistance and the stability of the system are improved.
15. The condensing surface is easier for industrial manufacture
According to the invention, a working scheme that the condenser and the absorber are separated in space is selected, and as the condenser and the absorber are effectively separated, the processing among all the surface shapes of the system does not need expensive integrated production equipment, so that the consumable cost is saved, and the industrial production cost can be effectively controlled.
Drawings
FIG. 1 is a schematic diagram of the geometry of a congruent surface non-imaging concentrator system of the present invention based on a solar vacuum tube absorber;
FIG. 2 is a schematic view of the system of the present invention collecting normally incident light from a daylight opening;
FIG. 3 is a schematic view of the system of the present invention collecting oblique incident light from a daylight opening;
in the figure: 1 is a high-power non-imaging condenser, 1-1 is a congruent plane plate condensing surface, and 1-2 is a water outlet; 2 is a solar vacuum tube, 2-1 is an absorption inner tube, and 2-2 is a heat insulation outer tube; 3 is a supporting structure; 4 is the incident solar ray.
Description of the embodiments
The present invention will be described in detail with reference to the accompanying drawings.
Examples
The utility model provides a full-surface non-imaging spotlight system based on solar vacuum tube absorber, including high-power non-imaging spotlight 1, solar vacuum tube 2, bearing structure 3, set up the recess on the bearing structure 3, set up high-power non-imaging spotlight 1 in the recess, high-power non-imaging spotlight 1 center sets up solar vacuum tube 2, high-power non-imaging solar spotlight 1 comprises a plurality of full-surface flat plate condensing surfaces 1-1, bearing structure 3 both ends backup pad is higher than inside recess, solar vacuum tube 2 both ends are placed on the backup pad, a plurality of full-surface flat plate condensing surfaces 1-1 regard solar vacuum tube 2 as the symmetry axis, the symmetry sets up, the full-surface flat plate condensing surfaces of many pairs of interconnect coacts; the four flat-plate collecting surfaces at the bottom of the high-power non-imaging condenser 1 form a W shape, two flat-plate collecting surfaces in the W shape are not connected to form a water outlet 1-2, rainwater generated by rain in a rainy day flows into the supporting structure 3 through the water outlet 1-2, through holes are arranged at the bottom and the side surfaces of the supporting structure 3, water flows out from the inside of the supporting structure 3 through the through holes, the solar vacuum tube 2 comprises an absorption inner tube 2-1 and a heat insulation outer tube 2-2, and the absorption inner tube 2-1 is arranged in the heat insulation outer tube 2-2.
In fig. 2, the high-power non-imaging solar concentrator 1 can concentrate solar rays 4 vertically incident from a lighting port onto the surface of an absorption inner tube 2-1 of an absorber, and the rays also pass through a transparent heat-insulating outer tube 2-2 in the process; the solar rays 4 obliquely entering from the lighting opening can be converged on the surface of the absorption inner tube 2-1 of the absorber, as shown in fig. 3, which shows that the high-power non-imaging solar concentrator 1 has remarkable friendliness on the incident solar rays 4 from the lighting opening, so that the stability of the light-heat conversion process of the high-power non-imaging solar concentrating system is effectively improved (for example, when the system is in operation, the system can still realize high-efficiency concentration without severe shaking of the concentrator caused by wind blowing).
After the solar rays 4 which are vertically incident or obliquely incident reach the surface of the solar vacuum tube 2, the solar rays can be converted into heat energy by the absorption inner tube 2-1 and transferred to an internal heat collecting working medium, and the output of the useful energy is realized under the flowing of the heat collecting working medium, and the solar vacuum tube 2 used by the invention is a conventional commercially available product.
The system can be rotated for a certain angle according to the needs, so that the high-power non-imaging condenser 1 can efficiently collect solar rays 4 incident from a lighting opening of the high-power non-imaging condenser in all daytime, and can collect more solar radiation energy relative to a conventional non-imaging condenser, and the engineering applicability of the non-imaging condenser is effectively improved.
On the other hand, the high-power non-imaging condenser 1 can efficiently collect solar radiation to reach the surface of the absorber within the receiving half angle, so that the tracking system does not need high-precision dynamic adjustment, the technical requirements of the tracking system are reduced, and the outdoor operation adaptability of the system is remarkably improved.
In addition, when the high-power non-imaging condenser 1 works, the synchronous collection of direct scattered radiation can be realized, the light collecting amount of the system is increased, and the absorber of the solar vacuum tube 2 and fluid in the absorber are important components of the total mass of the solar light collecting system.
The high-power non-imaging condenser 1 is composed of a bottom flat-plate condensing surface and two side flat-plate condensing surfaces, and comprises a plurality of pairs of congruent flat-plate condensing surfaces, so that the industrial manufacturing cost is reduced, the packaging logistics scheduling is simplified, the difficulties of maintenance, secondary installation and the like are reduced, and the practical economy is improved.
According to the invention, the working scheme that the condenser and the absorber are separated in space is selected, and the processing among all the surface shapes of the system does not need expensive integrated production equipment, so that the consumable cost is saved, and the industrial production cost can be effectively controlled.
The condensing surface of the conventional non-imaging condenser is mainly arc-shaped, and the condensing surface of the invention is composed of a plurality of pairs of congruent flat reflecting surfaces, thereby avoiding adverse effects caused by surface type collision and vibration in the production and transportation process and effectively reducing the transportation cost such as fixation, vibration prevention or interval protection. The separation of the condenser and the absorber also improves the interval of allowable installation errors, is beneficial to constructing a large-scale system platform, is beneficial to partial disassembly and secondary installation, and reduces the maintenance cost of the condensing system.
Claims (5)
1. The congruent surface non-imaging light gathering system based on the solar vacuum tube absorber is characterized by comprising a high-power non-imaging light gathering device (1), a solar vacuum tube (2) and a supporting structure (3), wherein a groove is formed in the supporting structure (3), the high-power non-imaging light gathering device (1) is arranged in the groove, and the solar vacuum tube (2) is arranged at the center of the high-power non-imaging light gathering device (1).
2. The congruent surface non-imaging condensing system based on the solar vacuum tube absorber according to claim 1, wherein the high-power non-imaging condenser (1) is composed of a plurality of congruent surface flat-plate condensing surfaces (1-1), and the plurality of congruent surface flat-plate condensing surfaces (1-1) are symmetrically arranged by taking the solar vacuum tube (2) as a symmetry axis.
3. The congruent surface non-imaging concentrating system based on the absorber of the solar vacuum tube according to claim 1, wherein the supporting plates at two ends of the supporting structure (3) are higher than the inner grooves, and the two ends of the solar vacuum tube (2) are placed on the supporting plates.
4. The congruent surface non-imaging condensing system based on the solar vacuum tube absorber according to claim 2, wherein the four flat condensing surfaces at the bottom of the high-power non-imaging condenser (1) form a W shape, and the two flat condensing surfaces in the V shape of the W shape are not connected to form a water outlet (1-2).
5. The congruent surface non-imaging condensing system based on the solar vacuum tube absorber according to claim 1, characterized in that the solar vacuum tube (2) comprises an absorption inner tube (2-1), an insulation outer tube (2-2), and the absorption inner tube (2-1) is arranged in the insulation outer tube (2-2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310110542.3A CN116294248B (en) | 2023-02-14 | 2023-02-14 | Congruent surface non-imaging concentrating system based on solar vacuum tube absorber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310110542.3A CN116294248B (en) | 2023-02-14 | 2023-02-14 | Congruent surface non-imaging concentrating system based on solar vacuum tube absorber |
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| CN116294248A true CN116294248A (en) | 2023-06-23 |
| CN116294248B CN116294248B (en) | 2024-04-09 |
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Citations (6)
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|---|---|---|---|---|
| JP2004053027A (en) * | 2002-05-27 | 2004-02-19 | Exedy Corp | Management system and management process system of solar light condensing unit |
| CN201160262Y (en) * | 2007-08-16 | 2008-12-03 | 张向阳 | Grooved concentration solar energy photovoltaic generator |
| CN101608836A (en) * | 2008-06-18 | 2009-12-23 | 深圳市中科力函热声技术工程研究中心有限公司 | Solar heat collector with combined reflecting surface |
| CN103022206A (en) * | 2012-12-18 | 2013-04-03 | 内蒙古建筑职业技术学院 | Groove-type compound parabolic concentrating power generation component |
| CN103199743A (en) * | 2013-03-10 | 2013-07-10 | 张国柱 | Controllable double-state light-reflection light-gathering solar heat collection generating set |
| CN105135711A (en) * | 2015-09-25 | 2015-12-09 | 中国科学院电工研究所 | Paraboloid-groove-type solar concentrator capable of collecting rainwater |
-
2023
- 2023-02-14 CN CN202310110542.3A patent/CN116294248B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004053027A (en) * | 2002-05-27 | 2004-02-19 | Exedy Corp | Management system and management process system of solar light condensing unit |
| CN201160262Y (en) * | 2007-08-16 | 2008-12-03 | 张向阳 | Grooved concentration solar energy photovoltaic generator |
| CN101608836A (en) * | 2008-06-18 | 2009-12-23 | 深圳市中科力函热声技术工程研究中心有限公司 | Solar heat collector with combined reflecting surface |
| CN103022206A (en) * | 2012-12-18 | 2013-04-03 | 内蒙古建筑职业技术学院 | Groove-type compound parabolic concentrating power generation component |
| CN103199743A (en) * | 2013-03-10 | 2013-07-10 | 张国柱 | Controllable double-state light-reflection light-gathering solar heat collection generating set |
| CN105135711A (en) * | 2015-09-25 | 2015-12-09 | 中国科学院电工研究所 | Paraboloid-groove-type solar concentrator capable of collecting rainwater |
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