CN201886197U

CN201886197U - High-concentration Fresnel combination lens

Info

Publication number: CN201886197U
Application number: CN2010205742344U
Authority: CN
Inventors: 王智勇; 叶征宇; 曹银花; 尧舜; 谭祺瑞
Original assignee: Beijing University of Technology
Current assignee: REDSOLAR NEW ENERGY TECHNOLOGY CO., LTD.
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-06-29
Anticipated expiration: 2020-10-15

Abstract

The utility model relates to a high-concentration Fresnel combination lens, which is characterized in that four, nine and n<2> off-axis Fresnel lenses are combined for improving the high-concentration times. The concentration times of the single Fresnel lens is limited. In order to improve the concentration times of the Fresnel lens, people make large-diameter Fresnel lenses, but the manufacture process of the large-diameter Fresnel lenses is complicated, and the cost is high. The utility model designs the off-axis Fresnel lens, a plurality of lenses are combined to be used, and the goal of high concentration is reached under the condition without increasing the processing cost and the processing difficulty.

Description

A kind of Fresnel compound lens of high power concentrator

Technical field

The utility model relates to a kind of Fresnel compound lens of high power concentrator, and this utility model is polylith to be combined from the axle Fresnel Lenses improve light concentrating times.Belong to the solar energy generation technology field.

Background technology

Under the promotion that society, environment, the energy and sustainable development etc. require, the clean energy resource alternative ore energy of seeking sustainable use has become whole world common recognition.Generally believe that in the world in long-term energy strategy, solar energy power generating has important status in numerous regenerative resources.But photovoltaic product in the market all is silica-based solar cell more than 90%.Through years of development, photoelectric transformation efficiency is all near its theoretical value.And the photovoltaic generation cost is still far above the price of main flow electricity market at present, and it is to promote by government basically that the photovoltaic market demand in recent years increases.Along with the decline year by year of government subsidy, photovoltaic industry must be sought self-survival strategy in the long run, how to raise the efficiency, reduces cost and will become the theme of regular period.Wherein condensation photovoltaic is to improve photoelectric transformation efficiency, reduces one of effective way of solar cell cost of electricity-generating, is subjected to international extensive concern.

Condensation photovoltaic is by adopting the optically focused technology, replace expensive solar cell with relatively cheap condenser, sunshine being converged to a kind of technology that solar battery surface generates electricity.People generally adopt the condenser of Fresnel Lenses as condensation photovoltaic at present, and in order to improve the light concentrating times of Fresnel Lenses, people make large diameter Fresnel Lenses.This Fresnel Lenses improves light concentrating times by the receiving area that increases sunshine, but large diameter Fresnel Lenses processing difficulties and cost height.The Fresnel compound lens of the related a kind of high power concentrator of the utility model, four, nine, square piece of n are combined from the axle Fresnel Lenses, each piece is the inclined-plane that certain inclination angle is arranged from the upper surface of axle Fresnel Lenses, and focal beam spot is circle and facula position off-center axle.The utility model improves the light concentrating times of Fresnel Lenses under the prerequisite that does not increase cost of manufacture.

Summary of the invention

The purpose of this utility model is to adopt the Fresnel compound lens to improve light concentrating times.Compare with the existing method that improves light concentrating times, the utility model has been taken into account difficulty of processing and cost problem when improving light concentrating times.

The utility model is according to the difference of combination Fresnel Lenses number, can be divided into four, nine, the multiple array modes such as square piece of n.Below stress the array mode of four and nine Fresnel Lenses, square piece of n is similar to the array mode of nine Fresnel Lenses.

The utility model adopts following technical scheme:

A kind of Fresnel compound lens of high power concentrator is characterized in that: this device is to constitute the Fresnel compound lens that the quantity of length and Width lens equates by four, nine, square piece Fresnel Lenses of n.

The Fresnel Lenses of four array modes all is from the axle Fresnel Lenses; The center position of square piece array mode of nine and n is common Fresnel Lenses, and the marginal position place is from the axle Fresnel Lenses.

The above-mentioned upper surface from the axle Fresnel Lenses is that the inclination angle is 2 ° inclined-plane.

The Fresnel compound lens that the utility model is related when improving light concentrating times, has been kept cost and difficulty of processing, is a kind of improvement that improves Fresnel Lenses light concentrating times method to existing.

Description of drawings

Fig. 1 is the vertical view of four Fresnel Lenses combinations of the utility model;

Fig. 2 is the vertical view of nine Fresnel Lenses combinations of the utility model;

Fig. 3 is sectional drawing from the axle Fresnel Lenses among Fig. 1, Fig. 2;

Fig. 4 is the sectional drawing of center position Fresnel Lenses among Fig. 2;

Among the figure: 1, four Fresnel compound lenss, 2,, 3, nine Fresnel compound lenss, 4, common Fresnel Lenses from the axle Fresnel Lenses.

Embodiment:

The utility model is described in further detail below in conjunction with the drawings and specific embodiments:

Embodiment 1

Present embodiment structure such as Fig. 1, shown in Figure 3 are by four Fresnel compound lenss 1 that combine from axle Fresnel Lenses 2.Solar light irradiation obtains the circle hot spot on axle Fresnel Lenses 2 after the focusing.All impinge upon on the solar cell through four four round hot spots that after axle Fresnel Lenses 2 focuses on, obtain, be solar light irradiation on Fresnel compound lens 1, be singlely to focus on four times that obtain light concentrating times through focusing on the light concentrating times obtain from axle Fresnel Lenses 2.Every from the axle Fresnel Lenses with solar light focusing to solar cell, sunshine after the focusing is a round hot spot, focusing on the round hot spot that obtains through four from the axle Fresnel Lenses all can impinge upon on the solar cell, the light concentrating times of supposing every Fresnel Lenses is 500 times, and then the light concentrating times of this Fresnel compound lens is 2000 times.

Embodiment 2

Present embodiment structure such as Fig. 2, Fig. 3, shown in Figure 4, promptly common Fresnel Lenses 4 that is in the center and eight are in the Fresnel compound lens 3 that combines from axle Fresnel Lenses 3 of marginal position by nine Fresnel Lenses.Solar light irradiation is being on the common Fresnel Lenses 4 of center, obtains the circle hot spot through focusing on.Solar light irradiation be in marginal position on axle Fresnel Lenses 2, obtaining the circle hot spot through focusing on.All be radiated on the solar cell through a common Fresnel Lenses 4 and eight nine round hot spots that after axle Fresnel Lenses 2 focuses on, obtain, be that solar light irradiation is on Fresnel compound lens 3, through to focus on the light concentrating times obtain be single common Fresnel Lenses 4 or singlely focus on nine times that obtain light concentrating times from axle Fresnel Lenses 2.

The light concentrating times of supposing every Fresnel Lenses is 500 times, and then the light concentrating times of this Fresnel compound lens is 4500 times.

Claims

1. the Fresnel compound lens of a high power concentrator is characterized in that: this device is to constitute the Fresnel compound lens that the quantity of length and Width lens equates by four, nine, square piece Fresnel Lenses of n.

2. the Fresnel compound lens of a kind of high power concentrator according to claim 1, it is characterized in that: the Fresnel Lenses of four array modes all is from the axle Fresnel Lenses; The center position of square piece array mode of nine and n is common Fresnel Lenses, and the marginal position place is from the axle Fresnel Lenses.

3. the Fresnel compound lens of a kind of high power concentrator according to claim 2, it is characterized in that: the upper surface from the axle Fresnel Lenses is that the inclination angle is 2 ° inclined-plane.