Design method of solar energy uniform light superposition reflective condenser

A reflective concentrating mirror and design method technology, applied in the field of solar concentrating, can solve problems such as high temperature, uneven light intensity distribution in the concentrating area, and low component efficiency

Inactive Publication Date: 2010-03-10
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

If the width of the reflector plate is not accurately determined and cut in advance, it is impossible to achieve the purpose of equalizing the width of the reflected illumination to the width of the illuminated solar cell array
[0003] The inventor found that, for photovoltaic power generation, the biggest disadvantage of the parabolic trough reflector-line concentrator is that the light intensity distribution in the concen

Method used

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  • Design method of solar energy uniform light superposition reflective condenser
  • Design method of solar energy uniform light superposition reflective condenser
  • Design method of solar energy uniform light superposition reflective condenser

Examples

Experimental program
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Embodiment 1

[0059] Embodiment 1, designing a semi-groove-shaped homogeneous light superimposed reflective condenser that concentrates light on an oblique photovoltaic panel. The width of the photovoltaic panel is W=100mm, and the nominal concentration ratio is about 15 times. The half-trough reflective condenser is composed of n reflective mirrors with a number greater than 2 arranged on the folding line trough frame. The design content includes selecting the inclination angle α of the photovoltaic panel to the X axis, the nominal focal length Z P , the slope, width, space coordinate position of each reflector, the number n of reflectors, etc. The purpose of the design is to ensure that the light reflected by each reflector just falls on the illuminated surface of the photocell. When the single-axis tracking sun altitude angle is on the sun tracking frame, the projection lines of the two parallel rays reflected by the two ends of the cross-section line segment of each reflector on the cr...

Embodiment 3

[0115] Embodiment 3 is the design method of a kind of light-receiving surface of the present invention is the uniform light superimposed reflective condenser of circular heat collecting tube, see image 3 . image 3 It is a schematic diagram of half of the cross-section of the uniform light superimposed reflective condenser mirror and the light path at noon time with the light receiving surface of the circular heat collecting tube of the present invention. The diameter of the heat collecting circular tube is D and the radius is R, and the width of the light receiving surface is d, where d≤D; The starting points of the 1st, 2nd, 3rd... mirrors are respectively P 1 , P 2 , P 3 , the endpoints are P 2 , P 3 , P 4 , the starting point of the i-th mirror is P i , the end point is P i+1 ; The X-axis of the X-Z two-dimensional Cartesian coordinate system is parallel to the plane of the sun tracker plane frame, which is the width coordinate of the condenser; the Z axis is perpe...

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Abstract

The invention discloses a design method of a solar energy uniform light superposition reflective condenser, wherein a light receiving surface is a photocell plate or a circular heat collection pipe. The design method is characterized in that a condensing lens consists of a limited number of flat plate reflection mirrors and broken line-shaped reflection mirror slot frames and is placed on a solartracking frame, a precise calculation formula of the width and the position of a space coordinate of each reflection mirror and the detailed steps of the geometric mapping method are deduced accordingto the constraint condition that two parallel light rays reflected by two end points of a line segment of a cross section of each reflection mirror respectively fall on two end points of a line segment of the cross section of the photocell plate or are respectively tangent with the circumference of the cross section of the circular heat collection pipe and the normal line of a mirror surface of the reflection mirror is an angle bisector of an included angle between incident light and reflected light, thereby ensuring that the reflected light of each flat plate reflection mirror is uniformly superposed on the light receiving surface, leading the single-chip output features of the photocell to be consistent, improving the light-emitting efficiency of components, leading the processing of the condenser to be easy and reducing the cost. The calculation formula can be used for optimizing the tilt angle and the nominal focal length of the photocell plate.

Description

Technical field: [0001] The invention belongs to the technical field of solar energy utilization, in particular to the solar energy concentrating technology. Background technique: [0002] Solar energy is the most reliable energy source for the sustainable development of human beings, but the density of solar energy is low. To use solar energy to generate electricity or reduce the cost of photovoltaic power generation, it is an effective way to use solar energy concentrating technology. At present, parabolic trough reflection-line concentration is usually used for solar concentration within tens of times. The common point of this type of concentration method is that each micro-element reflective mirror reflects sunlight on the theoretical focal line. The disadvantage is that it is difficult to achieve high precision in the processing of the geometric curved surface of the condenser mirror, and the processing cost is high. Seeing this problem, many scientific and technical w...

Claims

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Application Information

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IPC IPC(8): H01L31/052F24J2/46H01L31/054
CPCY02E10/40Y02E10/52Y02E10/50
Inventor 陈则韶江守利王刚胡芃莫松平张谦
Owner UNIV OF SCI & TECH OF CHINA
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