CN104849844A - Dish type Fresnel reflection concentration method and apparatus thereof - Google Patents
Dish type Fresnel reflection concentration method and apparatus thereof Download PDFInfo
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- CN104849844A CN104849844A CN201510120098.9A CN201510120098A CN104849844A CN 104849844 A CN104849844 A CN 104849844A CN 201510120098 A CN201510120098 A CN 201510120098A CN 104849844 A CN104849844 A CN 104849844A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000011514 reflex Effects 0.000 claims description 57
- 230000003287 optical effect Effects 0.000 claims description 15
- 238000010248 power generation Methods 0.000 claims description 5
- 230000004907 flux Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0038—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light
- G02B19/0042—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light for use with direct solar radiation
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
-
- 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
- F24S2023/872—Assemblies of spaced reflective elements on common support, e.g. Fresnel reflectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (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 relates to a dish type Fresnel reflection concentration method and an apparatus thereof. The dish type Fresnel reflection concentration apparatus comprises a series of bar-shaped annular reflection planes with different radiuses and a receiver, and incident lights are collected to the receiver at the other side of a light source via the reflection of the corresponding bar-shaped annular reflection planes. The incident lights are reflected and collected to the receiver via the bar-shaped annular reflection planes at different positions so that the energy density of the receiver is increased, and the goal of concentration is achieved. According to the practical application, the bar-shaped annular reflection planes with different parameters can be designed to reach required concentration times. The receiver and the light source are respectively arranged at two sides of a concentrator so that the flexibility of the arrangement of the receiver is improved, and gaps are arranged between the bar-shaped annular reflection planes so that the wind resistance of the apparatus is enhanced.
Description
Technical field
The present invention relates to technical field of solar utilization technique, is a kind of dish-style Fresnel reflection beam condensing unit, and can produce suitable focusing according to the requirement of receiver can flow.
Background technology
Sun power is the green energy resource that a kind of clean amount is large, and global total radiation is about 1.7 × 10
17w, wherein China accounts for 1%(1.8 × 10
15w, is equivalent to 1.9 trillion tons of mark coal/years), be 680 times of China's total energy consumption of current year.Sun power will occupy an important position in future source of energy.
Solar energy generation technology is mainly divided into photovoltaic generation and photo-thermal power generation.Photovoltaic generation mainly utilizes the photovoltaic effect of photovoltaic cell to generate electricity.Because solar energy current density is low, the photovoltaic battery panel area needed for unit generating capacity is large, and photovoltaic cell board manufacturing process energy consumption is large, seriously polluted.Therefore beam condensing unit is utilized to project the consumption that photovoltaic cell just can reduce battery again by after sunshine low for energy flux density gathering.The light-concentrating material be equivalent to price is relatively cheap replaces photovoltaic cell material.Photo-thermal power generation mainly utilizes condenser mirror to be gathered together by sunshine, is the heat energy of working medium, then is generated electricity by Thermal Motor by photothermal conversion.Same for reaching higher temperature, solar energy thermal-power-generating needs beam condensing unit.
Traditional condenser has Fresnel Lenses, slot type, dish-style and tower reflecting and condensing device.Fresnel Lenses adopts transmission material, through light refraction principle optically focused.Generally can to manufacture with optical plastic, but due to the limitations affect raising of focusing ratio of the refractive index of optical plastic.To the weight of system be made excessive according to glass.In addition because the optical property of material can have decay by a relatively large margin along with the time.Reflecting and condensing device needs accurate continuous reflection surface.When reflecting surface increases, give to manufacture and install and bring larger trouble.And its receptacle is generally positioned at the top of condenser, i.e. the position in high-altitude, causes a part of shading and installs receiver bringing larger difficulty.In addition photovoltaic and solar thermal utilization form all require receptacle has uniform as far as possible flux-density distribution, and traditional condenser not this characteristic.
Summary of the invention
In order to overcome the shortcoming of traditional condenser, the invention provides a kind of dish-style Fresnel reflection concentrating method and device thereof.
A kind of dish-style Fresnel reflection concentrating method, the device that the method uses comprises reflection mirror array and receiver, described reflection mirror array is made up of several bar shaped annular reflex face arranged by diameter, described bar shaped annular reflex face by the light that incides on it through reflecting focal on described receiver, described receiver and incident ray are respectively in the both sides of described reflection mirror array.
There is smooth reflecting surface inside described bar shaped annular reflex face, the light on its surface can be incided by usable reflection.
Described bar shaped annular reflex face cross the plane of axis the molded line that cuts be one or more in straight line, para-curve, circular arc, ellipse, hyperbolic curve, high order curve.
Described receiver is photovoltaic power generation apparatus or heat collector.
Described receiver entrance installs secondary condenser, improves the energy density arriving receiver.
Described bar shaped annular reflex face and receiver are arranged on dual-axis tracking system, make condenser axis just to the sun.
Described bar shaped annular reflex face is made up of less secondary bar shaped annular reflex face, and described secondary bar shaped annular reflex face arranges along optical axis direction.There is several secondary annular strip reflecting surface along optical axis direction arrangement the inner side in described bar shaped annular reflex face.
The zone line of the reflection mirror array that described bar shaped annular reflex face forms sets up Fresnel Lenses, described Fresnel Lenses is vertical with optical axis, part incident ray by the reflect focalization of bar shaped reflecting surface on receiver, another part incident ray through the Refractive focusing of Fresnel Lenses on receiver.
The dish-style Fresnel reflection beam condensing unit of described method, it is characterized in that comprising reflection mirror array, receiver and Fresnel Lenses, described reflection mirror array is made up of several bar shaped annular reflex face arranged by diameter, described Fresnel Lenses is positioned at the centre of the described reflection mirror array be made up of bar shaped annular reflex face, receiver and incident ray lay respectively at the both sides of described reflection mirror array, part incident ray passes through the reflect focalization of bar shaped reflecting surface on receiver, another part incident ray through the Refractive focusing of Fresnel Lenses on receiver.
This device is made up of a series of bar shaped annular reflex face and receiver, and the sunshine incided on bar shaped annular reflex face converges on the receiver of setting after passing through reflection.The sunshine accepted separately reflexes on receiver by different bar shaped annular reflex faces, forms focal beam spot, improves the energy flux density on receiver.Different bar shaped annular reflex faces is arranged in position, avoids a tore of reflection in the face of another reflection incident light of anchor ring or blocking of reflected light.The molded line of reflecting surface can select para-curve, ellipse, circle and high order curve etc., when ensureing spotlight effect, straight line can be selected to replace curved surface.In addition single condenser can be made up of the curve anchor ring of same kind, and curve combination not of the same race also can be adopted to become.
The invention provides a kind of lower beam condensing unit of improvement, produce the optically focused met required by receptacle.This device combines the local optically focused of similar Fresnel mirror and the thinking of localized design optimization, optimizes spotlight effect.Adopt narrow anchor ring to be that making and installation provides comparatively convenience, lighter reflecting material can be adopted, alleviate installation weight, reduce cost.
Solar energy after line focus efficiency utilization enough in various manners, general receiver is hot receiver and photovoltaic cell, produces heat or electric energy.This device needs corresponding support and tracker, makes device can aim at sunshine and carries out high-effective concentration.In addition this device can be coupled with secondary light condensing device further, improves the homogeneity of light gathering and flux-density distribution further.
Compared with prior art, the present invention has following advantage:
1, the present invention adopts multiple bar shaped annular reflex anchor ring to carry out reflecting condensation, can carry out condenser performance design, meet the light concentrating times needed for different receiver according to receiver characteristic, improves the homogeneity that can flow of focus point, flexible design.
2, the present invention adopts numerous reflection anchor ring optically focused, and receiver, in the below of condenser, facilitates support Design and receiver mounting arrangements, and decreases the incident light that conventional mounting brings above spotlight camber and block.
3, the annular light concentrating components making and installation of monolithic is more convenient, reduces the cost of package unit.
Accompanying drawing explanation
Fig. 1 is lower optically focused dish-style Fresnel reflection beam condensing unit schematic diagram;
Fig. 2 is single bar shaped annular reflex face schematic diagram;
Fig. 3 is the optically focused schematic diagram that optical axis cross section is crossed in multiple bar shaped annular reflex face;
Tu4Shi center arranges Fresnel Lenses beam condensing unit and crosses optical axis schematic cross-section;
Fig. 5 is the secondary annular strip reflecting surface schematic diagram of the present invention.
In figure, the name of sequence number is called: 1, axis, 2, incident ray, and the reflecting surface inside 3 bar shaped annular reflex faces, 4, bar shaped annular reflex face, 5, reflection ray, 6, receiver, 7, Fresnel Lenses, 8, secondary bar shaped annular reflex face.
Embodiment
Now by reference to the accompanying drawings, the present invention will be further described.
As Figure 1-4, a kind of dish-style Fresnel reflection concentrating method, its device used comprises reflection mirror array and receiver 6, described reflection mirror array is made up of several bar shaped annular reflex face 4 arranged by diameter, described bar shaped annular reflex face 4 by the light 2 that incides on it through reflecting focal on described receiver 6, described receiver 6 and incident ray 2 are respectively in the both sides of described reflection mirror array.
Inside described bar shaped annular reflex face, 3 have smooth reflecting surface, can incide the light on its surface by usable reflection.
Described bar shaped annular reflex face 4 cross the plane of axis 1 the molded line that cuts be one or more in straight line, para-curve, circular arc, ellipse, hyperbolic curve, high order curve.
Described receiver 6 is photovoltaic power generation apparatus or heat collector.
Described receiver entrance installs secondary condenser, improves the energy density arriving receiver.
Described bar shaped annular reflex face 4 and receiver 6 are arranged on dual-axis tracking system, make condenser axis just to the sun.As shown in Figure 5, there is several secondary annular strip reflecting surface 8 along optical axis direction arrangement the inner side in described bar shaped annular reflex face 4.
The zone line of the reflection mirror array that described bar shaped annular reflex face 4 forms sets up Fresnel Lenses 7, described Fresnel Lenses 7 is vertical with optical axis, part incident ray 2 by the reflect focalization of bar shaped reflecting surface 4 on receiver 6, another part incident ray 2 through the Refractive focusing of Fresnel Lenses 7 on receiver 6.
As shown in Figure 1, along the light 2 of optical axis 1 incidence, the reflecting surface 3 inside bar shaped annular reflex face 4 reflects, and reflection ray 5 changes direction and arrives receiver 6.Figure 2 shows that single bar shaped annular reflex face, axis has certain width, and inside surface has light-reflecting property.Reflecting surface molded line can be straight line, circular arc, para-curve, ellipse, hyperbolic curve and high order curve etc.The concrete molded line in its surface and width in the axial direction and diameter are designed according to himself position in the bar shaped annular reflex face 4 of each diverse location, make light can reflex on the receiver 6 of certain area, and adjacent bar shaped annular reflex face is reduced as much as possible block, improve optical efficiency.Shown in Fig. 3 is the condenser sectional view that multiple bar shaped annular reflex face 4 forms, and the light dropped on each bar shaped annular reflex face reflexes on receiver 6, and the energy flux density that receiver is accepted improves greatly, arrives the requirement needed for practical application.
Improvement project 1: when bar shaped annular reflex face 4 diameter is more and more less time, reflecting surface tangent slope is original larger, make bar shaped annular reflex face area larger, for saving material, as figure arranges Fresnel Lenses 7 in the middle of condenser, and make its focus just drop on receiver 6, improve the utilization factor of luminous energy, also improve the energy flux density on receiver.
Improvement project 2: described bar shaped annular reflex face 4 is made up of less secondary bar shaped annular reflex face 8, described secondary bar shaped annular reflex face 8 arranges along optical axis direction.As shown in Figure 5, bar shaped annular reflex face is divided into less secondary bar shaped annular reflex face 8, each secondary bar shaped annular reflex face by the light reflection that incides on it on receiver 6, therefore the molded line of the reflecting surface in secondary bar shaped annular reflex face 8 can replace just obtaining good spotlight effect with straight line, and whole bar shaped annular reflex face becomes writing board shape, be convenient to manufacture and install.
Claims (9)
1. a dish-style Fresnel reflection concentrating method, it is characterized in that comprising reflection mirror array and receiver (6), described reflection mirror array is made up of several bar shaped annular reflex face (4) arranged by diameter, described bar shaped annular reflex face (4) by the light (2) that incides on it through reflecting focal on described receiver (6), described receiver (6) and incident ray (2) are respectively in the both sides of described reflection mirror array.
2. dish-style Fresnel reflection concentrating method according to claim 1, inside it is characterized in that described bar shaped annular reflex face, (3) have smooth reflecting surface, can incide the light on its surface by usable reflection.
3. dish-style Fresnel reflection concentrating method according to claim 2, it is characterized in that described bar shaped annular reflex face (4) cross the plane of axis (1) the molded line that cuts be one or more in straight line, para-curve, circular arc, ellipse, hyperbolic curve, high order curve.
4. dish-style Fresnel reflection concentrating method according to claim 1, is characterized in that described receiver (6) is photovoltaic power generation apparatus or heat collector.
5. dish-style Fresnel reflection concentrating method according to claim 4, is characterized in that described receiver entrance installs secondary condenser, improves the energy density arriving receiver.
6. dish-style Fresnel reflection concentrating method according to claim 1, is characterized in that described bar shaped annular reflex face (4) and receiver (6) are arranged on dual-axis tracking system, makes condenser axis just to the sun.
7. dish-style Fresnel reflection concentrating method according to claim 1, is characterized in that there is several secondary annular strip reflecting surface (8) along optical axis direction arrangement the inner side in described bar shaped annular reflex face (4).
8. dish-style Fresnel reflection concentrating method according to claim 1, it is characterized in that the zone line of the reflection mirror array that described bar shaped annular reflex face (4) forms sets up Fresnel Lenses (7), described Fresnel Lenses (7) is vertical with optical axis, part incident ray (2) by the reflect focalization of bar shaped reflecting surface (4) on receiver (6), another part incident ray (2) through the Refractive focusing of Fresnel Lenses (7) on receiver (6).
9. the dish-style Fresnel reflection beam condensing unit of a method according to claim 8, it is characterized in that comprising reflection mirror array, receiver (6) and Fresnel Lenses (7), described reflection mirror array is made up of several bar shaped annular reflex face (4) arranged by diameter, described Fresnel Lenses (7) is positioned at the centre of the described reflection mirror array be made up of bar shaped annular reflex face (4), receiver (6) and incident ray (2) lay respectively at the both sides of described reflection mirror array, part incident ray (2) by the reflect focalization of bar shaped reflecting surface (4) on receiver (6), another part incident ray (2) through the Refractive focusing of Fresnel Lenses (7) on receiver (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510120098.9A CN104849844A (en) | 2015-03-19 | 2015-03-19 | Dish type Fresnel reflection concentration method and apparatus thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510120098.9A CN104849844A (en) | 2015-03-19 | 2015-03-19 | Dish type Fresnel reflection concentration method and apparatus thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125300A (en) * | 2016-06-29 | 2016-11-16 | 中国科学院国家天文台 | A kind of reflection type optical wave energy converges and emitting structural |
| CN107062636A (en) * | 2017-04-25 | 2017-08-18 | 东南大学 | Suitable for the combined light gathering device of solar thermal utilization |
| CN107919848A (en) * | 2016-10-11 | 2018-04-17 | 华北电力大学 | A kind of annular linear Fresnel high power concentrator device |
| GB2555572A (en) * | 2016-10-19 | 2018-05-09 | Amarjit Riyait | Solar concentrator, solar receiver and thermal storage |
| WO2018119994A1 (en) * | 2016-12-30 | 2018-07-05 | 博立多媒体控股有限公司 | Concentrating solar apparatus |
| CN108870772A (en) * | 2018-09-07 | 2018-11-23 | 广东工业大学 | A kind of free of sun tracking energy beam condensing unit |
| CN112885916A (en) * | 2021-03-30 | 2021-06-01 | 华北电力大学 | High-power concentrating photovoltaic device based on crystalline silicon battery and annular Fresnel condenser |
| CN115980988A (en) * | 2022-12-15 | 2023-04-18 | 南京航空航天大学 | High even light nature system of annular fei nieer of low mirror number |
| CN108870772B (en) * | 2018-09-07 | 2024-06-07 | 广东工业大学 | Tracking-free solar condensing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125300A (en) * | 2016-06-29 | 2016-11-16 | 中国科学院国家天文台 | A kind of reflection type optical wave energy converges and emitting structural |
| CN107919848B (en) * | 2016-10-11 | 2020-01-10 | 华北电力大学 | Annular linear Fresnel high-power condenser |
| CN107919848A (en) * | 2016-10-11 | 2018-04-17 | 华北电力大学 | A kind of annular linear Fresnel high power concentrator device |
| GB2555572A (en) * | 2016-10-19 | 2018-05-09 | Amarjit Riyait | Solar concentrator, solar receiver and thermal storage |
| GB2555572B (en) * | 2016-10-19 | 2021-03-10 | Storenergy D O O | Solar concentrator, solar receiver and thermal storage |
| US10976113B2 (en) | 2016-10-19 | 2021-04-13 | Storenergy Holdings, Ltd. | Solar concentrator, solar receiver and thermal storage |
| WO2018119994A1 (en) * | 2016-12-30 | 2018-07-05 | 博立多媒体控股有限公司 | Concentrating solar apparatus |
| CN107062636A (en) * | 2017-04-25 | 2017-08-18 | 东南大学 | Suitable for the combined light gathering device of solar thermal utilization |
| CN108870772A (en) * | 2018-09-07 | 2018-11-23 | 广东工业大学 | A kind of free of sun tracking energy beam condensing unit |
| CN108870772B (en) * | 2018-09-07 | 2024-06-07 | 广东工业大学 | Tracking-free solar condensing device |
| CN112885916A (en) * | 2021-03-30 | 2021-06-01 | 华北电力大学 | High-power concentrating photovoltaic device based on crystalline silicon battery and annular Fresnel condenser |
| CN115980988A (en) * | 2022-12-15 | 2023-04-18 | 南京航空航天大学 | High even light nature system of annular fei nieer of low mirror number |
| CN115980988B (en) * | 2022-12-15 | 2023-09-29 | 南京航空航天大学 | Low-mirror-number annular Fresnel Gao Yun light system |
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Application publication date: 20150819 |
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