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A Design Method of Solar Concentrating System Consisting of Multiple Aspheric Mirrors

A technology of solar concentrating and system design, applied in the field of solar energy utilization, can solve the problems of increasing design difficulty, increasing degrees of freedom, increasing the concentration ratio of solar concentrating system, etc.

Inactive Publication Date: 2020-11-06
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in the degree of freedom also means that the design difficulty increases
[0007] So far there is no complete and effective method to design a solar concentrating system composed of multiple aspheric mirrors to increase the concentration ratio of the solar concentrating system

Method used

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  • A Design Method of Solar Concentrating System Consisting of Multiple Aspheric Mirrors
  • A Design Method of Solar Concentrating System Consisting of Multiple Aspheric Mirrors
  • A Design Method of Solar Concentrating System Consisting of Multiple Aspheric Mirrors

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Embodiment 1

[0077] The method for designing a solar concentrating system composed of a plurality of aspheric surfaces includes the following steps:

[0078] 1. In the Cartesian coordinate system XYZ, for the 8th even-order aspheric equation,

[0079]

[0080] In the formula, , the first term of the equation is equivalent to a quadric surface, in the formula C is the vertex curvature of the quadric, 1+ a 2 is the quadratic surface coefficient, a 2 related to the eccentricity of the quadric; a 4 , a 6 , a 8 is the coefficient of each high-order term in the polynomial of the aspheric equation;

[0081] see figure 2 , There are m 8th-order aspherical mirrors in the solar concentrating system, 2≤m≤200, where m=21, these aspherical vertices are located at figure 2 The thick line in the mesh, that is, the coordinates of the 21 aspheric mirror vertices are (0, 200, 200), (0, 200, 180), (0, 200, 160), (0, 200, 140), (0, 200, 120), (0 , 200,100), (0,200,80), (0, 200,60), (0, 200...

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Abstract

The invention discloses a design method of a solar energy concentrating system composed of a plurality of aspherical reflectors. Determine the number of reflectors that make up the concentrating system, and place the vertices of all reflectors in the YOZ plane regularly; make the incident solar beam parallel to the XOY plane, and its incident unit direction vector, take the focal point P f ( x f ,- x f the tan θ ,0) on the reflected ray passing through point O; O point on any reflected ray P ''( x ', y '', z ''), P ''and P f the distance between R , n As the fitness function in the particle swarm algorithm optimization program; for the vertex in O '( a ,b, c ) point of the aspheric surface, a= 0, then take O ’ is the origin to establish a new coordinate system, and the new coordinate system becomes, P f becomes P f ',use ... to replace, P f 'replace P f , optimized to get vertices at O ’ The aspheric parameters at .

Description

technical field [0001] The invention belongs to the field of solar energy utilization, and particularly relates to a design method of a high concentration ratio reflective solar energy concentrating system composed of a plurality of aspherical mirrors. Background technique [0002] Using a solar reflection system to directly concentrate sunlight in a small area to form a high temperature heat source has always been an important research direction in the field of solar energy utilization. It is widely used in solar cookers and solar ignition devices, and has also been obtained in solar thermal power generation. more and more practice. As the name implies, a solar concentrator system is a tool that collects or focuses a large area of ​​solar radiation onto a small receiver or output device. [0003] In 212 BC, the ancient Greek physicist Archimedes designed a solar concentrating device that burned the Roman fleet. The device is said to be a concave polished metal mirror, hun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B19/00G02B27/00
CPCG02B19/0004G02B19/0019G02B19/0042G02B27/0012
Inventor 秦华张爽李文瑞
Owner SHANDONG UNIV OF TECH