CN102393084A - Fresnel solar secondary reflection device - Google Patents
Fresnel solar secondary reflection device Download PDFInfo
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- CN102393084A CN102393084A CN2011103531259A CN201110353125A CN102393084A CN 102393084 A CN102393084 A CN 102393084A CN 2011103531259 A CN2011103531259 A CN 2011103531259A CN 201110353125 A CN201110353125 A CN 201110353125A CN 102393084 A CN102393084 A CN 102393084A
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- fish scale
- reflection device
- secondary reflection
- solar energy
- scale shape
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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
- 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
Abstract
The invention relates to a Fresnel solar secondary reflection device which comprises an arachnoid rigid structure and a two-dimension discretization fish scale reflector array, wherein the fish scale reflector array is embedded in the arachnoid rigid structure; preferably, and the arachnoid rigid structure is formed by arranging a beam frame structure along a circular arc direction and a beam frame structure along a radial direction in a staggered manner; the fish scale reflector array is embedded between the beam frame structure along the circular arc direction and the beam frame structure along the radial direction; the included angle between the radial beam frame structure and the horizontal plane does not exceed 12 degrees; and the fish scale reflector array has a common curved surface reflector imaging characteristic, and is composed of a series of discontinuous rotating curved surfaces with shared focal point and different forming parameters, and each discontinuous rotating curved surface is formed by fitting of a discrete fish scale reflector array unit. The reflection device provided by the invention has the advantages of unique design, simple structure and low manufacturing cost, and can be used for effectively solving the air-resistance problem; and simultaneously the reliability is improved, the shadow shield problem of an eyeglass unit does not appear, and the reflection device is suitable for being popularized and applied on a large scale.
Description
Technical field
The present invention relates to technical field of solar energy utilization equipment, particularly the solar energy reflection apparatus technical field specifically is meant a kind of Fresnel formula solar energy secondary reflection device, can be used for photo-thermal power generation.
Background technology
The secondary reflection solar heat power generation system is improved on the basis of traditional tower-type solar thermal power generating system; Because traditional tower system is installed in the high cat head of tens of rice with heat dump; Convection current and radiation loss are bigger, and heat dump I&M cost is bigger, therefore can pass through at the hyperboloid type of position of sound production of cat head or the secondary reflection device of ellipsoid type; Thereby change heat dump into floor mounted; With the reduction heat energy loss, and the corollary equipment of simplification part high-altitude heat dump, system cost and risk significantly cut down.Wherein the design of secondary reflection system is the key component in the whole solar heat power generation system design.
The secondary reflection mirror type mainly contains hyperboloid type and ellipsoid type at present; Because secondary reflection mirror size is bigger; Be difficult to produce secondary reflection mirror on the common engineering, therefore need be combined into secondary reflection system with many facet mirrors with above-mentioned type function with certain curved surface.Existing technology mainly is to adopt the level crossing of discretization to be spliced into the secondary reflection system with above-mentioned type shape.Because the secondary reflection system of this discretization is formed by many level crossing matches that integral body has a certain radian, its complex structure, mechanical installation accuracy is difficult to be realized.
The Fresnel reflection device is meant that the discontinuous plan mirror by a series of different angle is combined into the reflection unit with arbitrary type function.The Fresnel reflection unit mainly is utilized in the trough type solar power generation system in heat generating system at present, with respect to the trough type solar power generation system, has simple in structurely, makes, operating cost is low and wind resistance is good, is easier to characteristics such as commercialization.And the application of Fresnel reflection formula device in the secondary reflection system still do not have and reported.
The present invention is applied to Fresnel reflection formula device in the secondary reflection system; Adopt the Fresnel formula solar energy secondary reflection device of this kind structure, simple in structure, low cost of manufacture, and effectively improved the anti-problem of wind; Improve reliability simultaneously, the shade occlusion issue between lens unit do not occurred.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, a kind of Fresnel formula solar energy secondary reflection device is provided, this Fresnel formula solar energy secondary reflection device design is unique; Simple in structure; Low cost of manufacture, and effectively improved the anti-problem of wind, improved reliability simultaneously; The shade occlusion issue between lens unit do not occur, be suitable for large-scale promotion application.
In order to realize above-mentioned purpose, Fresnel formula solar energy secondary reflection device of the present invention, its characteristics are, comprise the fish scale shape speculum battle array of arachnoid rigid structure and two-dimensional discreteization, said fish scale shape speculum battle array is embedded in said arachnoid rigid structure.
Preferably; Said arachnoid rigid structure is by along the curve of circular arc direction or polygonal beam shelf structure with straight line radially, curve or polygonal beam shelf structure are staggered forms; Said fish scale shape speculum battle array is embedded between described curve or polygonal beam shelf structure and described radially straight line, curve or polygonal beam shelf structure along the circular arc direction, and the angle of described straight line, curve or polygonal beam shelf structure and horizontal plane radially is no more than 12 °.
Preferably, said two-dimensional discreteization is meant along circular arc direction discretization with along the diametric(al) discretization.
Preferably; Said fish scale shape speculum battle array by a series of confocal points but the different discontinuous surface of revolution of face shape parameter form; Each said discontinuous surface of revolution is formed by discrete fish scale shape speculum array element match; Said fish scale shape speculum battle array has common curved reflector imaging characteristic, and said fish scale shape speculum array element has the fish scale shape of irregular arrangement.
More preferably, said fish scale shape speculum array element is made up of some reflecting optics unit with different angle, while said reflecting optics unit is near the lacking away from the said center of circle that compare in the center of circle of the said discontinuous surface of revolution at its place.
Further, said reflecting optics unit is ladder plane mirror or rectangle plane mirror.
More preferably, said discontinuous surface of revolution is the hyperboloid of revolution or revolution ellipsoid.
More preferably; Said arachnoid rigid structure is by along the curve of circular arc direction or polygonal beam shelf structure with straight line radially, curve or polygonal beam shelf structure are staggered forms; Said fish scale shape speculum array element is installed in respectively between two described straight line, curve or polygonal beam shelf structures radially, and the angle of described straight line, curve or polygonal beam shelf structure and horizontal plane radially is no more than 12 °.
Further, said fish scale shape speculum array element is made up of some reflecting optics unit with different angle, and said reflecting optics unit all is positioned on same curved surface or the plane.
Especially more preferably, realize the variation of the focal length of said Fresnel formula solar energy secondary reflection device through the inclination angle size that changes each said reflecting optics unit.
Compared with prior art; Technique effect of the present invention is: a kind of Fresnel formula solar energy secondary reflection device provided by the invention; The fish scale shape speculum battle array that comprises arachnoid rigid structure and two-dimensional discreteization, said fish scale shape speculum battle array is embedded in said arachnoid rigid structure simple in structure, low cost of manufacture; And effectively improved the anti-problem of wind; Improved reliability simultaneously, the shade occlusion issue between lens unit do not occurred, had the performance more excellent than the secondary reflection mirror system of conventional discretization.
Description of drawings
Fig. 1 is the schematic top plan view of a specific embodiment of Fresnel formula solar energy secondary reflection device of the present invention.
Fig. 2 looks sketch map for the master of specific embodiment shown in Figure 1.
Fig. 3 is the structural representation that adopts the monolithic reflective module that goes up base coplane and linear beam shelf structure radially in the Fresnel formula solar energy secondary reflection device of the present invention.
Fig. 4 is the evolution key diagram of Fresnel formula solar energy secondary reflection device of the monolithic reflective module of employing Fig. 3 of the present invention.
Fig. 5 is the structural representation that adopts the monolithic reflective module of bottom coplane and linear beam shelf structure radially in the Fresnel formula solar energy secondary reflection device of the present invention.
Fig. 6 is the structural representation that adopts the monolithic reflective module of camber beam shelf structure radially in the Fresnel formula solar energy secondary reflection device of the present invention.
Fig. 7 is the evolution key diagram of Fresnel formula solar energy secondary reflection device of the monolithic reflective module of employing Fig. 6 of the present invention.
Fig. 8 is the structural representation that adopts the monolithic reflective module of polygonal beam shelf structure radially in the Fresnel formula solar energy secondary reflection device of the present invention.
Fig. 9 is the evolution key diagram of Fresnel formula solar energy secondary reflection device of the monolithic reflective module of employing Fig. 8 of the present invention.
Figure 10 is the Fresnel solar energy secondary reflection device evolution key diagram of employing of the present invention linear beam shelf structure radially in same horizontal plane.
Figure 11 is the schematic perspective view of the Fresnel solar energy secondary reflection device of employing of the present invention linear beam shelf structure radially in same horizontal plane.
The specific embodiment
In order more to be expressly understood technology contents of the present invention, the special following examples of lifting specify, and wherein identical parts adopt identical Reference numeral.When the embodiment of the invention was detailed, for ease of explanation, the indication device structural representation can be disobeyed general ratio and amplified, and said sketch map is example, and it should not limit the scope of the present invention's protection at this.
For ease of picture specification, introduce a virtual monolithic reflective module 1 here, it is made up of two beam frame structure 11 and fish scale shape speculum array elements of installing between two beam frame structures 11 radially 30 radially.
See also shown in Fig. 1 and 2, be the structural representation of Fresnel formula solar energy secondary reflection device of the present invention.The fish scale shape speculum battle array 10 that wherein said Fresnel formula solar energy secondary reflection device comprises the two-dimensional discrete structure be used to install the arachnoid rigid structure 20 of fish scale shape speculum battle array 10, form by be circle distribution and overall fit be that an imaging characteristic is similar to the planform that the polylith monolithic reflective module 1 of common curved reflector is formed.As shown in Figure 2; Described arachnoid rigid structure 20 comprises along the beam frame structure 15 of circular arc direction and beam frame structure radially 11; Both are staggered, and fish scale shape speculum battle array 10 is installed near arachnoid rigid structure 20, and beam frame structure 11 radially is no more than 12 ° with the angle of horizontal plane.
Shown in Fig. 3 and 4; Monolithic reflective module 1 comprise two radially beam frame structure 11 and install the fish scale shape speculum array element 30 between two beam frame structures 11 radially; In this embodiment, described two beam frame structures 11 radially are the linear beam shelf structure, are the polygonal beam shelf structure along the beam frame structure 15 of circular arc direction; Described fish scale shape speculum array element 30 is made up of the reflecting optics unit 12 that multi-disc is fixed in the different angle between described two beam frame structures 11 radially; This reflecting optics unit 12 is the ladder plane speculum, and its one side near the center of circle of described circle distribution is shorter, and is longer away from the one side in the center of circle.In this embodiment, as shown in Figure 3, the last base 13 of described reflecting optics unit 12 all is positioned at same plane.
In another embodiment, as shown in Figure 5, can make the bottom 14 of described reflecting optics unit 12 be positioned at same plane.Also can make the line segment that is parallel to the base in the described lens unit 12 be positioned at same plane.
In another embodiment; Shown in Fig. 6 and 7; Described two beam frame structures 11 radially are the camber beam shelf structure; Beam frame structure 15 along the circular arc direction is the camber beam shelf structure, and described fish scale shape speculum array element 30 is made up of the reflecting optics unit 12 that multi-disc is fixed in the different angle between described two beam frame structures 11 radially, and this reflecting optics unit 12 is the ladder plane speculum; Its one side near the center of circle of described circle distribution is shorter, and is longer away from the one side in the center of circle.Described two beam frame structures 11 radially also can be the polygonal beam shelf structure; Described beam frame structure 15 along the circular arc direction also can be the polygonal beam shelf structure; Described reflecting optics unit 12 also can be for rectangular, planar mirrors or other shape plane mirrors, shown in Fig. 8 and 9.
A kind of preferred embodiment in; As shown in Figure 8; Described beam frame structure 11 radially is the polygonal beam shelf structure; The quantity of the reflecting optics unit 12 between the quantity of the linear beam section that the polygonal beam shelf structure is included and the beam frame structure 11 that is arranged at radially equates, and described linear beam section and the 12 corresponding settings of described reflecting optics unit.
This secondary reflection device is a two-dimensional discrete structure, and is promptly circumferentially discrete, as shown in Figure 1 with radially.Adopt different curved surface 2 (hyperboloid of revolution or revolution ellipsoid) face shape parameters in each endless belt (being the annular region that the beam frame structure 15 by along the circular arc direction shown in Fig. 1 is separated to form); Require the curved surface 2 in each endless belt to have identical last focus 3 and following focus 4, as shown in Figure 4.Realize the variation of secondary reflection device focal length through the inclination angle size that changes each reflecting optics unit.As shown in Figure 1, the hyperboloid of revolution face shape parameter formula in each endless belt is following:
c＝c
0 (1)
Wherein, c
0Be this secondary reflection device hyperboloid of revolution face shape parameter of equal value, (y z) is the coordinate of beam frame structure 11 discretization points radially, and a, b and c are the hyperboloid of revolution face shape parameter in each endless belt.
Revolution ellipsoid face shape parameter formula in each endless belt is following:
c＝c
0 (2)
Wherein, c
0Be this secondary reflection device revolution ellipsoid face shape parameter of equal value, (y z) is the coordinate of beam frame structure 11 discretization points radially, and a, b and c are the revolution ellipsoid face shape parameter in each endless belt.
A kind of preferred embodiment in, shown in figure 11, radially beam frame structure 11 is 0 ° with the angle of horizontal plane.Described monolithic reflective module 1 comprise two radially beam frame structure 11 and install the fish scale shape speculum array element 30 between two beam frame structures 11 radially; Described two beam frame structures 11 radially are the linear beam shelf structure; Beam frame structure 15 along the circular arc direction is the polygonal beam shelf structure; Described fish scale shape speculum array element 30 is made up of the reflecting optics unit 12 that multi-disc is fixed in the different angle between described two beam frame structures 11 radially; This reflecting optics unit 12 is the ladder plane speculum, and its one side near the center of circle of described circle distribution is shorter, and is longer away from the one side in the center of circle.Describedly circumferentially be uniform discrete with discretization radially, the bottom 14 of described reflecting optics unit 12 is positioned at same plane, and the curved surface 2 in described each endless belt is the hyperboloid of revolution.In this embodiment, shown in figure 10, the hyperboloid of revolution face shape parameter formula in each endless belt is following:
c＝c
0 (3)
Wherein, a
0And c
0Be the hyperboloid of revolution face shape parameter that this secondary reflection device is of equal value, y be the coordinate figure of uniform discrete point radially, and a, b and c are the interior hyperboloid of revolution face shape parameter of each endless belt.The Fresnel reflection formula solar energy secondary reflection structure drawing of device that obtains is shown in figure 11.
In another preferred embodiment, beam frame structure 11 radially is 0 ° with the angle of horizontal plane.Described monolithic reflective module 1 comprise two radially beam frame structure 11 and install the fish scale shape speculum array element 30 between two beam frame structures 11 radially; Described two beam frame structures 11 radially are the linear beam shelf structure; Beam frame structure 15 along the circular arc direction is the polygonal beam shelf structure; Described fish scale shape speculum array element 30 is made up of the reflecting optics unit 12 that multi-disc is fixed in the different angle between described two beam frame structures 11 radially; This reflecting optics unit 12 is the ladder plane speculum, and its one side near the center of circle of described circle distribution is shorter, and is longer away from the one side in the center of circle.Describedly circumferentially be uniform discrete with discretization radially, the bottom 14 of described reflecting optics unit 12 is positioned at same plane, and the curved surface 2 in described each endless belt is revolution ellipsoid.In this embodiment, the revolution ellipsoid face shape parameter formula in each endless belt is following:
c＝c
0 (4)
Wherein, a
0And c
0Be the revolution ellipsoid face shape parameter that this secondary reflection device is of equal value, y be the coordinate figure of uniform discrete point radially, and a, b and c are the interior revolution ellipsoid face shape parameter of each endless belt.
The present invention is applied to Fresnel reflection formula device in the secondary reflection system; Adopt the Fresnel formula solar energy secondary reflection device of this kind structure, simple in structure, low cost of manufacture, and effectively improved the anti-problem of wind; Improve reliability simultaneously, the shade occlusion issue between lens unit do not occurred.
To sum up, Fresnel formula solar energy secondary reflection device design of the present invention is unique, simple in structure, low cost of manufacture, and effectively improved the anti-problem of wind, and having improved reliability simultaneously, the shade occlusion issue between lens unit does not appear, be suitable for large-scale promotion application.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (10)
1. a Fresnel formula solar energy secondary reflection device is characterized in that, comprises the fish scale shape speculum battle array of arachnoid rigid structure and two-dimensional discreteization, and said fish scale shape speculum battle array is embedded in said arachnoid rigid structure.
2. Fresnel formula solar energy secondary reflection device according to claim 1; It is characterized in that; Said arachnoid rigid structure is by along the curve of circular arc direction or polygonal beam shelf structure with straight line radially, curve or polygonal beam shelf structure are staggered forms; Said fish scale shape speculum battle array is embedded between described curve or polygonal beam shelf structure and described radially straight line, curve or polygonal beam shelf structure along the circular arc direction, and the angle of described straight line, curve or polygonal beam shelf structure and horizontal plane radially is no more than 12 °.
3. Fresnel formula solar energy secondary reflection device according to claim 1 is characterized in that said two-dimensional discreteization is meant along circular arc direction discretization with along the diametric(al) discretization.
4. Fresnel formula solar energy secondary reflection device according to claim 1; It is characterized in that; Said fish scale shape speculum battle array by a series of confocal points but the different discontinuous surface of revolution of face shape parameter form; Each said discontinuous surface of revolution is formed by discrete fish scale shape speculum array element match, and said fish scale shape speculum battle array has common curved reflector imaging characteristic, and said fish scale shape speculum array element has the fish scale shape of irregular arrangement.
5. Fresnel formula solar energy secondary reflection device according to claim 4; It is characterized in that; Said fish scale shape speculum array element is made up of some reflecting optics unit with different angle, while said reflecting optics unit is near the lacking away from the said center of circle that compare in the center of circle of the said discontinuous surface of revolution at its place.
6. Fresnel formula solar energy secondary reflection device according to claim 5 is characterized in that said reflecting optics unit is ladder plane mirror or rectangle plane mirror.
7. Fresnel formula solar energy secondary reflection device according to claim 4 is characterized in that said discontinuous surface of revolution is the hyperboloid of revolution or revolution ellipsoid.
8. Fresnel formula solar energy secondary reflection device according to claim 4; It is characterized in that; Said arachnoid rigid structure is by along the curve of circular arc direction or polygonal beam shelf structure with straight line radially, curve or polygonal beam shelf structure are staggered forms; Said fish scale shape speculum array element is installed in respectively between two described straight line, curve or polygonal beam shelf structures radially, and the angle of described straight line, curve or polygonal beam shelf structure and horizontal plane radially is no more than 12 °.
9. Fresnel formula solar energy secondary reflection device according to claim 8 is characterized in that said fish scale shape speculum array element is made up of some reflecting optics unit with different angle, and said reflecting optics unit all is positioned on same curved surface or the plane.
10. Fresnel formula solar energy secondary reflection device according to claim 9 is characterized in that, realizes the variation of the focal length of said Fresnel formula solar energy secondary reflection device through the inclination angle size that changes each said reflecting optics unit.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925711A (en) * | 2014-04-25 | 2014-07-16 | 东南大学 | Lighting device |
| GB2511516A (en) * | 2013-03-05 | 2014-09-10 | David Andrew Johnston | Radiation reflector using tensioned metallised sheets |
| CN105674588A (en) * | 2016-04-05 | 2016-06-15 | 上海晶电新能源有限公司 | Multi-secondary reflection tower-confocal solar photothermal mirror field system |
| CN107894658A (en) * | 2017-12-11 | 2018-04-10 | 湖南科技大学 | A kind of non-imaged dish-style concentrator and its design method |
| CN112433358A (en) * | 2020-11-30 | 2021-03-02 | 中国科学院长春光学精密机械与物理研究所 | Space ultra-large-diameter lens hood |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20120328 |