CN116067023A - Solar composite plane concentrating system based on single-arm design - Google Patents
Solar composite plane concentrating system based on single-arm design Download PDFInfo
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- CN116067023A CN116067023A CN202310050481.6A CN202310050481A CN116067023A CN 116067023 A CN116067023 A CN 116067023A CN 202310050481 A CN202310050481 A CN 202310050481A CN 116067023 A CN116067023 A CN 116067023A
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- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 238000013461 design Methods 0.000 title claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 239000006096 absorbing agent Substances 0.000 abstract description 12
- 230000001932 seasonal effect Effects 0.000 abstract description 2
- 239000012141 concentrate Substances 0.000 abstract 1
- 230000005494 condensation Effects 0.000 description 34
- 238000009833 condensation Methods 0.000 description 34
- 230000005855 radiation Effects 0.000 description 10
- 238000009826 distribution Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002096 quantum dot Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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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
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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
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/50—Preventing overheating or overpressure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a solar composite plane concentrating system based on single-arm design, which comprises a single-arm concentrating surface and a solar vacuum tube, wherein the solar vacuum tube comprises an absorption inner tube and a heat insulation outer tube, the absorption inner tube is arranged in the heat insulation outer tube, and the solar vacuum tube is arranged at the bottom of the single-arm concentrating surface; the solar energy composite plane concentrating system with a single-arm design is utilized to concentrate solar direct-scattered radiant energy, the vacuum tube is used as an absorber to convert light/heat energy, the concentrating system not only has higher heat collecting efficiency at lower economic cost, but also realizes 'seasonal selectivity' to solar energy, prolongs the average working time of the concentrating system, and has better industrial application prospect.
Description
Technical Field
The invention belongs to the technical field of solar energy utilization, and particularly relates to a solar energy composite plane concentrating system based on a single-arm design.
Background
Along with the increase of the human social demand, the existing traditional energy source can not meet the living demand, and the solar energy is used as an emerging energy source, and has the advantages of high availability, large storage quantity, reproducibility and the like, so that good economic benefit can be brought. And the secondary consumption and pollution caused by solar energy in the aspects of collection and transportation are smaller than those of conventional energy sources. However, despite the huge total amount of solar radiation energy reaching the earth's surface, which is about ten thousand times the total human energy consumption, it is often difficult to meet the industrial and agricultural energy requirements by directly utilizing the energy due to its low energy density. Therefore, the effective collection and efficient utilization of solar energy have been a very active research topic.
The non-imaging compound parabolic condensation system has the advantages of static operation, adjustable operation time, direct radiation collection and the like, and is commonly provided with a cavity absorption system, a quantum dot fluorescent condensation system, a V-shaped groove type condensation system, a linear Fresnel lens type condensation system and the like, but the traditional compound parabolic condensation system also has the problems of low uniformity of energy distribution on an absorber, high overheat risk in summer, more limited condensation conditions and the like.
Disclosure of Invention
In order to solve the problems existing in the conventional solar concentrating system during operation, the invention constructs the solar composite plane concentrating system based on the non-imaging optical theory and the marginal ray theory in geometrical optics, improves the uniformity of the surface energy distribution of the absorber of the non-imaging concentrating system, improves the space allocation of solar radiation energy collection, eliminates the phenomenon that the solar radiation energy cannot be concentrated due to the interception of light rays by the south surface of the conventional concentrating system, ensures the stable operation of the concentrating system, ensures that the characteristic of collecting solar energy is matched with the functional heat requirement of a building, and further realizes the energy saving of the building.
The technical scheme of the invention is as follows:
the solar composite plane concentrating system based on the single-arm design comprises a single-arm concentrating surface 1 and a solar vacuum tube 2, wherein the solar vacuum tube 2 comprises an absorption inner tube 2-1 and a heat insulation outer tube 2-2, the absorption inner tube 2-1 is arranged in the heat insulation outer tube 2-2, and the solar vacuum tube 2 is arranged at the bottom of the single-arm concentrating surface 1.
The bottom of the single-arm collecting surface 1 is of a W shape, one side of the W shape is provided with a collecting surface, and the collecting surface consists of a plurality of equal-length plane collecting surfaces; the solar composite plane condensation system with the single-arm design adopts a mode of removing the south condensation surface with lower utilization rate, improves the condensation performance of the condensation system, can obtain better condensation effect under higher economic benefit compared with the traditional solar condensation system, and in addition, the condensation system is placed along the length direction, provides better environmental adaptability and higher daylighting field utilization rate for the solar condensation system, thereby being beneficial to widening the industrial application scene of the solar condensation system.
The solar composite plane concentrating system based on the single-arm design further comprises a vacuum tube support 3 and a concentrating surface support 4, wherein the solar vacuum tube 2 is arranged on the vacuum tube support 3, the single-arm concentrating surface 1 is arranged on the concentrating surface support 4, and the solar vacuum tube 2 is arranged on the W-shaped bottom of the single-arm concentrating surface 1, so that concentrating is facilitated.
The single-arm condensing surface consists of a plurality of congruent planes, when the incident angle of the solar rays is within the receiving half-angle range of the condensing system, the solar rays converged based on the principle of marginal rays are reflected by the single-arm condensing surface to reach the surface of the absorption inner tube of the solar vacuum tube, and then heat exchange is carried out by the vacuum tube, so that the photo-thermal conversion of the solar condensing system is realized.
Compared with the prior art, the invention has the beneficial effects that:
1. static efficient collection of radiant energy
According to the invention, the solar radiation energy is collected by the condensing system in a static and efficient manner within the receiving half angle by utilizing the marginal ray theory, and a high-precision tracking technology is not required to be added, so that the construction difficulty of the condensing system is reduced, and the industrial application range of the condensing system is expanded.
2. Realizing space-time allocation of solar energy "
Because the solar altitude angle is smaller in winter, the traditional condensing system has the problem of low condensing efficiency, and the condensing system can receive solar rays in winter by removing the condensing surface on the south, so that the problem of reduced heat collecting efficiency of the condensing system is avoided, and the condensing system better meets the seasonal heat requirement of people. The condensing system has the characteristic of collecting solar radiation energy in a 'selective' manner in seasons, so that the 'space-time allocation' of the solar radiation energy is realized.
3. Annual lighting amount elevation
The solar energy collection system based on regional typical meteorological year data can improve the average solar radiation energy collected annually in a unit light opening area, so that the characteristic of collecting solar energy is matched with the functional heat utilization requirement of a building, and the conversion efficiency of an integrated system is improved.
4. Prolonging the light-gathering time
Aiming at the problem that the influence of the external environment on the traditional condensing system is high, the solar condensing system can change the receiving half angle of the surface type according to the latitudes of different areas, is better suitable for the change of the external environment under different latitudes, and even if the incident light exceeds the maximum receivable angle of the condensing surface, part of the light can reach the absorber, so that the condensing system can run continuously, and the average working time of the condensing system is prolonged.
5. The concentration ratio is flexible and adjustable
The invention changes the limit of the fixed width of the lighting opening of the traditional light gathering system, and the width of the light gathering opening can be changed along with the change of the incident angle of the sun, so that the geometric light gathering ratio of the light gathering system can be flexibly adjusted in a certain range, and the light gathering adaptability of the light gathering system is enhanced.
6. Improving the utilization efficiency of the collecting surface
The invention aims at the problem that the condensing surface of the traditional condensing system intercepts illumination to cause incapability of condensing, and avoids the problem that the south surface of the condensing system cannot be effectively utilized in more time by removing the south surface shape structure, thereby improving the overall condensing performance of the condensing system.
7. Avoiding accelerated aging of the condensing surface
The invention avoids the problem that part of the condensing surfaces cannot receive solar radiation energy when the solar rays are incident from a certain angle in the traditional condensing system, thereby controlling the temperature rising speed, protecting the condensing surfaces from being damaged by thermal stress, avoiding the accelerated aging of the condensing surfaces and prolonging the service life.
8. Strengthen spotlight system heat transfer effect
The condensing system adopts a single-arm design, reduces the heat loss during working, and the energy flow distribution on the surface of the absorber is more matched with the heating temperature of the heat transfer working medium in the pipe, so that a larger convection heat transfer coefficient can be obtained, and the heat exchange performance of the condensing system is improved.
9. Improving uniformity of absorber surface energy distribution
The traditional condensing system has the advantages that the energy distribution is concentrated, the local overheating can cause the element damage, the peak value of the energy distribution of the absorber can be effectively improved, the law of the density distribution of the energy flow on the surface of the absorber is more suitable for the efficient energy conversion, and the long-term stable operation of a non-imaging condensing integrated system is more beneficial.
10. Reducing gap loss of condensing system
The reflection surface structure of the invention is optimally designed, so that the existence of the vacuum interlayer can not cause optical loss, thereby improving the optical efficiency.
11. High interchangeability of equal-length surfaces of light condensation
The single-arm collecting surface is formed by combining a plurality of equal-length planes by adopting equal-length treatment, so that compared with the traditional parabolic collecting surface, the invention reduces the production, manufacturing and transportation costs of elements, is beneficial to the assembly of an integral system, and in the maintenance and replacement process, the equal-length plane structure is convenient to disassemble and reassemble, so that the economic benefit of the collecting system is improved.
12. High economic benefit
The invention has the advantages of fewer follower parts, simple and stable structure, ideal light-condensing effect can be achieved by only using about half of the components of the traditional light-condensing system, no complex tracking technology is needed, the economic cost is low, and the invention has good engineering application potential.
13. Improving the utilization rate of the light-collecting field
The concentrating system is axially and horizontally arranged, and the inclination angle is set according to the incident angle of the light, so that the shading phenomenon between the concentrating system and the solar energy concentrating system can be effectively eliminated, the concentrating effect is improved, the utilization rate of a lighting field is enhanced, and a feasible reference is provided for engineering application of the solar energy concentrating system.
Drawings
FIG. 1 is a schematic view of the structure of a single-arm condensing surface and a solar vacuum tube of the condensing system of example 1;
fig. 2 is a schematic perspective view of a condensing system according to embodiment 1;
FIG. 3 is a schematic view of example 1 collecting normally incident light from a daylight opening;
FIG. 4 is a schematic view of example 1 for collecting oblique incident light from a daylight opening;
in the figure: 1 is a single-arm collecting surface; 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 vacuum tube bracket; 4 is a collecting surface bracket; and 5 is solar rays.
Description of the embodiments
The invention will be further illustrated with reference to specific examples.
Examples
The solar composite plane condensation system based on the single-arm design comprises a single-arm condensation surface 1, a solar vacuum tube 2, a vacuum tube support 3 and a condensation surface support 4, wherein the bottom of the single-arm condensation surface 1 is W-shaped, one side of the W-shaped condensation surface is provided with the condensation surface, the condensation surface is formed by bonding a plurality of condensation planes with equal length, the condensation surface is bonded on the condensation surface support 4, the solar vacuum tube 2 is placed on the vacuum tube support 3, the solar vacuum tube 2 is arranged on the W-shaped bottom of the single-arm condensation surface 1, the bottom of the single-arm condensation surface 1 is placed in a sticking way, and the front end of the single-arm condensation surface passes through the lower surface of the solar vacuum tube 2, so that the solar vacuum tube 2 is positioned at the bottom of the condensation surface 1; the solar vacuum tube 2 comprises an absorption inner tube 2-1 and an insulation outer tube 2-2, wherein the absorption inner tube 2-1 is arranged in the insulation outer tube 2-2.
As shown in fig. 3, in the solar composite plane concentrating system based on the single-arm design, the vertical incidence simulated solar rays 5 reach the heat insulation outer tube 2-2 of the absorber through the lighting port and then are concentrated on the surface of the absorption inner tube 2-1 of the absorber; the simulated solar rays 5 of the inclination angle in fig. 4 can also be collected in the above manner, and for solar rays beyond the receiving half angle range, which cannot be directly converged on the solar vacuum tube 2, the solar rays can also be continuously reflected on the absorber surface through the bottom W-shaped structure converging surface, which is beneficial to enhancing the efficiency and the persistence of converging solar rays in the operation process of the converging system and is beneficial to the long-term stable operation of the non-imaging converging integrated system.
The solar rays 5 which are vertically incident or obliquely incident can be efficiently converged on the surface of the absorption inner tube 2-1 of the solar vacuum tube 2, and the collected solar radiation energy is mainly concentrated on the lower semicircle of the solar vacuum tube 2, so that the energy distribution characteristic is beneficial to reducing the heat loss during the operation of the condensing system and improving the heat collecting performance of the condensing system.
In fig. 4, the whole condensing system is arranged along the length direction, and the south condensing surface with lower utilization rate is removed, so that light rays with lower solar altitude angle can be effectively received, and the condensing performance of the condensing system is significantly improved (such as reducing gap loss, improving optical efficiency, improving the uniformity of the energy distribution on the surface of an absorber, enhancing heat collection effect and increasing annual light collection amount); in addition, the collecting surface bracket 4 is placed in a sticking way, so that shading phenomena among elements can be eliminated, the utilization efficiency of a lighting field is increased, the wind resistance during the light collecting operation is improved, and the stability and the high efficiency of long-term working of the light collecting surface bracket are improved.
In the production and manufacturing process of the condensing system, only a single-arm condensing surface is needed, the follower of the condensing system is less, the cost is low, the interchangeability of the needed condensing surfaces with equal length is high, and the condensing system is beneficial to maintenance and replacement; the high interchangeability also provides guarantee for flexible and adjustable geometric condensation ratio of the condensation system, has better condensation adaptability, prolongs the average working time, and better meets the heat consumption requirement of people, so that the condensation system realizes 'space-time allocation' of solar energy.
Claims (5)
1. The solar composite plane concentrating system based on the single-arm design is characterized by comprising a single-arm concentrating surface (1) and a solar vacuum tube (2), wherein the solar vacuum tube (2) comprises an absorption inner tube (2-1) and a heat insulation outer tube (2-2), the absorption inner tube (2-1) is arranged in the heat insulation outer tube (2-2), and the solar vacuum tube (2) is arranged at the bottom of the single-arm concentrating surface (1).
2. The solar composite plane concentrating system based on the single-arm design according to claim 1 is characterized in that the bottom of the single-arm concentrating surface (1) is of a W shape, and a concentrating surface is arranged on one side of the W shape.
3. The solar composite planar concentrating system of claim 2 wherein the concentrating surface is comprised of a plurality of equal length planes.
4. Solar composite planar concentrating system based on a single-arm design according to claim 1 or 2, further comprising a vacuum tube holder (3), the solar vacuum tube (2) being placed on the vacuum tube holder (3).
5. The solar composite plane concentrating system based on the single-arm design according to claim 4, further comprising a concentrating surface bracket (4), wherein the single-arm concentrating surface (1) is arranged on the concentrating surface bracket (4), and the solar vacuum tube (2) is arranged on the W shape at the bottom of the single-arm concentrating surface (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310050481.6A CN116067023A (en) | 2023-02-01 | 2023-02-01 | Solar composite plane concentrating system based on single-arm design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310050481.6A CN116067023A (en) | 2023-02-01 | 2023-02-01 | Solar composite plane concentrating system based on single-arm design |
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| Publication Number | Publication Date |
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| CN116067023A true CN116067023A (en) | 2023-05-05 |
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| CN202310050481.6A Pending CN116067023A (en) | 2023-02-01 | 2023-02-01 | Solar composite plane concentrating system based on single-arm design |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2172903C1 (en) * | 2000-04-07 | 2001-08-27 | Стребков Дмитрий Семенович | Solar module with concentrator |
| US20020195099A1 (en) * | 2001-06-08 | 2002-12-26 | Clark Walter E. | Solar oven having a multiple zone concentrator |
| KR20070058309A (en) * | 2005-12-02 | 2007-06-08 | 정점식 | Condenser for solar heat absorber of vacuum tube type |
| JP2011190984A (en) * | 2010-03-15 | 2011-09-29 | Nikkeikin Aluminium Core Technology Co Ltd | Solar light collector |
| KR20120113632A (en) * | 2011-04-05 | 2012-10-15 | 선다코리아주식회사 | Condenser for solar heat absorber of vacuum tube type for concentrating sunlight having uneven type reflector |
| CN103836807A (en) * | 2012-11-21 | 2014-06-04 | 常州美迪克能源科技有限公司 | Horizontal shaft type asymmetric single parabola combined non-tracking solar condenser |
-
2023
- 2023-02-01 CN CN202310050481.6A patent/CN116067023A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2172903C1 (en) * | 2000-04-07 | 2001-08-27 | Стребков Дмитрий Семенович | Solar module with concentrator |
| US20020195099A1 (en) * | 2001-06-08 | 2002-12-26 | Clark Walter E. | Solar oven having a multiple zone concentrator |
| KR20070058309A (en) * | 2005-12-02 | 2007-06-08 | 정점식 | Condenser for solar heat absorber of vacuum tube type |
| JP2011190984A (en) * | 2010-03-15 | 2011-09-29 | Nikkeikin Aluminium Core Technology Co Ltd | Solar light collector |
| KR20120113632A (en) * | 2011-04-05 | 2012-10-15 | 선다코리아주식회사 | Condenser for solar heat absorber of vacuum tube type for concentrating sunlight having uneven type reflector |
| CN103836807A (en) * | 2012-11-21 | 2014-06-04 | 常州美迪克能源科技有限公司 | Horizontal shaft type asymmetric single parabola combined non-tracking solar condenser |
Non-Patent Citations (1)
| Title |
|---|
| 陈飞、施健鹏: "圆形吸收体贝壳形复合抛物聚光器模型构件及其性能", 《农业工程学报》, vol. 38, no. 3, 15 February 2022 (2022-02-15), pages 173 - 181 * |
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