CN205404942U

CN205404942U - Be applied to focusing photovoltaic generation's even spotlight fresnel lens of seven focuses stack

Info

Publication number: CN205404942U
Application number: CN201620143418.2U
Authority: CN
Inventors: 王进军
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2016-02-26
Filing date: 2016-02-26
Publication date: 2016-07-27
Anticipated expiration: 2026-02-26

Abstract

The utility model provides a be applied to focusing photovoltaic generation's even spotlight fresnel lens of seven focuses stack, including six the same concentric multilateral fan -shaped unit fresnel lens and a regular hexagon unit fresnel lens, the consecutive concatenation of six the same concentric multilateral fan -shaped unit fresnel lens's second limit head and the tail, concentric multilateral fan -shaped unit fresnel lens's second limit in proper order again with regular hexagon unit fresnel lens's fourth limit zonulae occludens, the second limit is the same with fourth length of side degree, seven unit fresnel lens pass through the homogeneity of light wave stack improvement focusing spot energy, have avoided the local focus of the inhomogeneous formation of traditional spotlight fresnel lens spotlight, and then have improved solar energy conversion efficiency and battery life, advantages such as the even spotlight fresnel lens of this seven focuses stack has simple structure, realizes easily, with low costs.

Description

It is applied to seven focus superposition uniform condensing Fresnel Lenses of concentrating photovoltaic power generation

[technical field]

This utility model relates to collecting lens technical field, is specifically related to a kind of seven focus superposition uniform condensing Fresnel Lenses being applied to concentrating photovoltaic power generation.

[background technology]

Photovoltaic generation is that the one that solar energy directly utilizes primarily forms, Fresnel Lenses is one of core component of concentration photovoltaic system, the quality of its performance directly affects the performance of whole system, traditional some light-focusing Fresnel lens is uneven due to the Energy distribution of optically focused hot spot, incident sunlight forms hot localised points at battery surface after optically focused, the existence of hot localised points can reduce battery conversion efficiency on the one hand, battery can be damaged on the other hand, shorten battery, cause that the photoelectric transformation efficiency of solar photovoltaic generation system is low.

[utility model content]

For conventional point light-focusing Fresnel lens Problems existing, the purpose of this utility model is in that a kind of seven focus superposition uniform condensing Fresnel Lenses being applied to concentrating photovoltaic power generation, by conventional point light-focusing Fresnel lens being resolved into seven parts, then again these seven parts are reconfigured, improve the uniformity of focal beam spot Energy distribution according to the principle of stacking of light.

To achieve these goals, this utility model provides techniques below scheme:

It is applied to seven focus superposition uniform condensing Fresnel Lenses of concentrating photovoltaic power generation, including six identical concentric polygonal sector unit Fresnel Lenses and a regular hexagon unit Fresnel Lenses；The lens face imprinting of described concentric polygonal sector unit Fresnel Lenses ascending isocentric circular arc, sector lens bread parantheses limit and the first limit, the second limit, the 3rd limit；Second limit relative with arc limit is through the center of circle of concentric polygonal sector unit Fresnel Lenses isocentric circular arc, two end points on the second limit are connected with the first limit and the 3rd limit respectively, described first limit and the 3rd frontier juncture are symmetrical in straight line L, and straight line L is perpendicular to the second limit and the center of circle through isocentric circular arc；

The lens face of described regular hexagon unit Fresnel Lenses includes six and is mutually 120 ° of the 4th limit, and inside comprises four concentric endless belt；Described 4th limit is tangent with the Article 4 endless belt of concentric endless belt and be 60 ° with concentric endless belt center of circle subtended angle；

Second limit head and the tail of six identical concentric polygonal sector unit Fresnel Lenses are sequentially connected splicing, second limit of described concentric polygonal sector unit Fresnel Lenses successively again with the 4th limit compact siro spinning technology of described regular hexagon unit Fresnel Lenses, the second limit is identical with the 4th edge lengths.

Further, the lens face of described concentric polygonal sector unit Fresnel Lenses three-arc from inside to outside is semicircle, and described second limit is through the center of circle of isocentric circular arc, and is completely superposed with the string of three-arc.

Further, described regular hexagon unit Fresnel Lenses and concentric polygonal sector unit Fresnel Lenses are obtained by the cutting of point focusing Fresnel Lenses.

Advantage of the present utility model is:

It is applied to seven focus superposition uniform condensing Fresnel Lenses of concentrating photovoltaic power generation, including six identical concentric polygonal sector unit Fresnel Lenses and a regular hexagon unit Fresnel Lenses, seven unit Fresnel Lenses improve the uniformity of focal beam spot energy by light wave superposition, avoid the hot localised points of the conventional point uneven formation of light-focusing Fresnel lens optically focused, and then improve solar energy conversion efficiency and battery life.

Further, as long as concentrating photovoltaic power generation seven focus superposition uniform condensing Fresnel Lenses needs conventional point light-focusing Fresnel lens is carried out described cutting and splicing, it is not necessary to carry out new construction design, therefore lens arrangement is simply, easily realize, less costly.

[accompanying drawing explanation]

Fig. 1 is the front view of embodiment 1 concentrating photovoltaic power generation seven focus superposition uniform condensing Fresnel Lenses.

Fig. 2 is the front view of the concentric polygonal sector unit Fresnel Lenses of embodiment 1.

Fig. 3 is the front view of embodiment 1 regular hexagon unit Fresnel Lenses.

Fig. 4 is the cutting schematic diagram of embodiment 2 regular hexagon unit Fresnel Lenses.

Fig. 5 is the cutting schematic diagram of the concentric polygonal sector unit Fresnel Lenses of embodiment 3.

Labelling in figure: 1-concentrating photovoltaic power generation seven focus superposition uniform condensing Fresnel Lenses, the concentric polygonal sector unit Fresnel Lenses of 2-, 3-the first limit, 4-the second limit, 5-the 3rd limit, 6-regular hexagon unit Fresnel Lenses, 7-the 4th limit, 8-point light-focusing Fresnel lens, 9-concentric polygonal sector unit Fresnel Lenses line of cut, 10-regular hexagon unit Fresnel Lenses line of cut.

[detailed description of the invention]

Below in conjunction with drawings and Examples, the utility model is described in further detail.But this should not being interpreted as, the scope of the above-mentioned theme of this utility model is only limitted to following example, and all technology realized based on above-mentioned utility model content belong to scope of the present utility model.

Embodiment 1

The front view of concentrating photovoltaic power generation seven focus superposition uniform condensing Fresnel Lenses 1 described in the present embodiment is as shown in Figure 1.It is spliced by the identical concentric polygonal sector unit Fresnel Lenses 2 of six as shown in Figure 2 and a regular hexagon unit Fresnel Lenses 6 as shown in Figure 3；The ascending isocentric circular arc of the lens face imprinting of described concentric polygonal sector unit Fresnel Lenses 2, described lens face is concentric polygonal sector, including the first the 3, second limit the 4, the 3rd, limit limit 5 and arc limit；Two end points on described second limit 4 are connected with the first limit 3 and the 3rd limit 5 respectively, and described lens face three-arc from inside to outside is semicircle, and described second limit 4 is through the center of circle of isocentric circular arc, and is completely superposed with the string of three-arc；Described first limit 3 and the 3rd limit 5 are symmetrical about straight line L, and described straight line L is perpendicular to the second limit 4 and through the center of circle of lens face isocentric circular arc.

The lens face of described regular hexagon unit Fresnel Lenses 6 includes six and is mutually 120 ° of the 4th limit 7, comprises four concentric endless belt inside described lens face；Described 4th limit 7 is tangent with the Article 4 endless belt of concentric endless belt and be 60 ° with concentric endless belt center of circle subtended angle.

Described concentrating photovoltaic power generation seven focus superposition uniform condensing Fresnel Lenses 1 by six identical concentric polygonal sector unit Fresnel Lenses second limit 4 head and the tail be sequentially connected splicing, the second limit 4 of described concentric polygonal sector unit Fresnel Lenses successively again with the 4th limit 7 compact siro spinning technology of described regular hexagon unit Fresnel Lenses.

Embodiment 2

The regular hexagon unit Fresnel Lenses 6 in concentrating photovoltaic power generation seven focus superposition uniform condensing Fresnel Lenses 1 described in the present embodiment can focus on cutting Fresnel Lenses 8 from conventional point and obtain, and comprises the following steps:

(1) doing a regular hexagon at traditional point focusing Fresnel Lenses 8 center, described hexagonal six limits 9 are outwards tangent with the 4th concentric circular that endless belt is corresponding with from the center of circle respectively, as shown in Figure 4.

(2) along described orthohexagonal six limits 9, described regular hexagon unit Fresnel Lenses 6 is cut down from a light-focusing Fresnel lens 8.

Embodiment 3

The concentric polygonal sector unit Fresnel Lenses 2 in concentrating photovoltaic power generation seven focus superposition uniform condensing Fresnel Lenses 1 described in the present embodiment all can focus on cutting Fresnel Lenses 8 from conventional point and obtain, and comprises the following steps:

(1) above step is repeated, a regular hexagon is done at traditional point focusing Fresnel Lenses 8 center, described orthohexagonal six limits are outwards tangent with the 4th concentric circular that endless belt is corresponding with from the center of circle respectively, adjust described orthohexagonal angle, make just to intersect at described orthohexagonal two drift angles A, B 2 point from the straight line in the described concentric circular center of circle, as shown in Figure 5.

(2) connect the 3rd endless belt of described orthohexagonal two further pairs drift angle EG, FH and described donut tangent with C, D 2 points, described intercepting CD section on AB straight line, the second limit 4 to ensure concentric polygonal sector unit Fresnel Lenses 2 is relative with the described orthohexagonal length of side.

(3) connect described OE, OF and outside described concentric circular garden extend, with ensure described concentric polygonal sector unit Fresnel Lenses 2 the second limit 4 with concentric endless belt center of circle subtended angle for 60 °, as shown in Figure 5.

(4) cross described C, D point respectively and do the parallel lines 10 of described OE, OF, and extend outside described concentric circular garden.

Along regular hexagon unit Fresnel Lenses line of cut shown in described Fig. 5 10 described concentric polygonal sector unit Fresnel Lenses 2 all can be focused on from conventional point and Fresnel Lenses 8 cuts down.

Claims

1. it is applied to seven focus superposition uniform condensing Fresnel Lenses of concentrating photovoltaic power generation, it is characterised in that: include six identical concentric polygonal sector unit Fresnel Lenses (2) and regular hexagon unit Fresnel Lenses (6)；

The lens face imprinting of described concentric polygonal sector unit Fresnel Lenses (2) ascending isocentric circular arc, sector lens bread parantheses limit and the first limit (3), the second limit (4), the 3rd limit (5)；Second limit (4) relative with arc limit is through the center of circle of concentric polygonal sector unit Fresnel Lenses (2) isocentric circular arc, two end points on the second limit (4) are connected with the first limit (3) and the 3rd limit (5) respectively, described first limit (3) and the 3rd limit (5) are symmetrical about straight line L, and straight line L is perpendicular to the second limit (4) and through the center of circle of isocentric circular arc；

The lens face of described regular hexagon unit Fresnel Lenses (6) includes six and is mutually 120 ° of the 4th limit (7), and inside comprises four concentric endless belt；Described 4th limit is tangent with the Article 4 endless belt of concentric endless belt and be 60 ° with concentric endless belt center of circle subtended angle；

Second limit (4) head and the tail of six identical concentric polygonal sector unit Fresnel Lenses (2) are sequentially connected splicing, second limit (4) of described concentric polygonal sector unit Fresnel Lenses (2) successively again with the 4th limit (7) compact siro spinning technology of described regular hexagon unit Fresnel Lenses (6), the second limit (4) are identical with the 4th limit (7) length.

2. the seven focus superposition uniform condensing Fresnel Lenses being applied to concentrating photovoltaic power generation according to claim 1, it is characterized in that: the lens face of described concentric polygonal sector unit Fresnel Lenses (2) three-arc from inside to outside is semicircle, described second limit (4) is through the center of circle of isocentric circular arc, and is completely superposed with the string of three-arc.

3. the seven focus superposition uniform condensing Fresnel Lenses being applied to concentrating photovoltaic power generation according to claim 1, it is characterised in that: described regular hexagon unit Fresnel Lenses (6) and concentric polygonal sector unit Fresnel Lenses (2) are obtained by point focusing Fresnel Lenses (8) cutting.