Distribution force optimization method for transforming cylindrical surface into parabolic groove surface

An optimization method and parabolic trough technology, which is applied in the field of solar concentrators, can solve problems such as the influence of concentrators on concentrating precision, and achieve the effects of improving product quality, reducing production costs, and ensuring optical efficiency and service life

Pending Publication Date: 2021-12-21
HARBIN INST OF TECH
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Problems solved by technology

In the process of changing the cylindrical surface to a parabolic surface, it is easy to have a great impact on the concentrating accuracy of the concentrator, and the price paid to achieve higher accuracy is also very high.

Method used

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  • Distribution force optimization method for transforming cylindrical surface into parabolic groove surface
  • Distribution force optimization method for transforming cylindrical surface into parabolic groove surface
  • Distribution force optimization method for transforming cylindrical surface into parabolic groove surface

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specific Embodiment 1

[0042] according to Figure 1 to Figure 6 As shown, the premise of the specific optimization technical scheme that the present invention takes for solving the above-mentioned technical problems is: suppose (1) the stiffness of the groove surface material is isotropic; (2) strain and deflection are very small, based on these assumptions, the groove surface deformation is linear elastic. The concrete technical scheme that the present invention takes for solving the above-mentioned technical problem is: be to apply a limited number of concentrated loads perpendicular to the paraboloid with a binary driver on the back of the cylindrical reflective surface, these concentrated loads or push or pull, that is, or point to the focal length side, Or away from the focal length side.

[0043] To obtain the force that deforms the arc into a parabola, suppose n unknown forces are required. In order to minimize the radial error between the simulation optimization result and the target idea...

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Abstract

The invention relates to a distribution force optimization method for transforming a cylindrical surface into a parabolic groove surface. According to the method, the force enabling the arc to deform into the parabola is obtained, when n unknown forces are needed, in order to minimize the radial error of the simulation optimization result and the target ideal parabola, the parameter focal diameter ratio, namely the ratio of the paraboloid focus to the cylinder radius, is defined, the parabolic equation closest to the arc is determined, the parabola closest to the arc is taken as the target, the radial error is minimized through optimization analysis, and the corresponding distributed control force for eliminating the displacement error is obtained.

Description

technical field [0001] The invention relates to the technical field of solar concentrators, and proposes a numerical optimization method for transforming a circular arc into a parabolic arc by using distributed force, that is, the parabolic shell is formed by applying force at multiple points from a cylindrical shell, which has engineering feasibility. Background technique [0002] Solar energy is a clean, sustainable form of new energy. However, the energy density of solar radiation reaching the earth's surface is relatively low, so to make full use of solar energy, it is necessary to focus the sunlight to achieve the purpose of improving utilization efficiency. Parabolic troughs have long been used in solar systems because of their focusing properties. In the actual manufacturing process of the condenser, because the cylindrical surface is easier to manufacture than the parabolic surface, the flat plate can be rolled into a cylindrical surface, and then the cylindrical su...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B19/00G06F30/23
CPCG02B27/0012G02B19/0042G02B19/0019G06F30/23
Inventor 李丽芳郭朋真王俊才谭立英马晶刘荣强邓宗全
Owner HARBIN INST OF TECH
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