Design method of solar energy uniform light superposition reflective condenser

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...

AI Technical Summary

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 concentrating area is uneven, resulting in the module efficiency after the series-parallel connection of photovoltaic cells is much lower than the single-piece efficiency ; For the circular heat collecting tubes that use light and heat, the reflected light of the parabolic trough is only distributed on the lower surface of the heat collecting tubes, and the irradiated local surface temperature is high and the heat loss is large

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