Method for designing panel receiving type compound parabolic concentrator

A compound paraboloid and design method technology, which is applied in the design field of flat-plate receiving compound parabolic concentrator, can solve the problems such as the decline of CPC economy, the difficulty of increasing CPC installation, and the inability to guarantee the uniformity of light intensity.

Active Publication Date: 2014-07-23
XI AN JIAOTONG UNIV
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Problems solved by technology

[0003] Applying CPC to low-power concentrating photovoltaics and comprehensive utilization of photovoltaics and heat can make good use of the advantages of CPC pointed out above. However, as the concentration ratio of CPC increases, the height of CPC will also increase significantly, which will lead to CPC The economy is significantly reduced, which increases the difficulty of CPC installation. Therefore, according to the characteristics of CPC, it is intercepte

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  • Method for designing panel receiving type compound parabolic concentrator
  • Method for designing panel receiving type compound parabolic concentrator
  • Method for designing panel receiving type compound parabolic concentrator

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] Such as figure 1 As shown, in the xoy coordinate system, the known parameter is the exit pupil width of the CPC Geometric concentration ratio C G Among them, CPC is given by the parabola Symmetrically formed on the Y axis, F and F' are parabolas The focal point and vertex of ; the unknown parameters are the lighting half-angle θ of the CPC and the focal length of the parabola Height H 1 and the best uniform surface B 1 f 1 Distance from exit pupil BF According to the geometric relation ∠A 1 CF≡θ and ∠F 1 BF=θ, establish the relationship between known parameters and unknown parameters, that is, by known parameters C calculates the unknown parameters θ, H 1 , Determine the geometry size of the design CPC.

[0034]The calculation process of the design method of the present invention is:

[0035] Include the following steps:

[0036] 1) Est...

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Abstract

The invention discloses a method for designing a panel receiving type compound parabolic concentrator. The method comprises the steps that the emergent light hole width and the geometric concentrating ratio C[G] of the CPC are designed as needed, the incident light hole width = C[G] * , the height H[1], the daylighting half-angle theta, the focal length of a parabola , and the distance between the optimal uniform face B[1]F[1] and an emergent light hole of the CPC are calculated, and then, the geometric structure size of the CPC is determined. According to the method for designing the panel receiving type CPC, the height H[1] of the CPC can be greatly reduced, the light intensity uniformity, on the optimal uniform face B[1]F[1], of the CPC can be improved after condensation, and the economy and condensation performance of the CPC are improved.

Description

technical field [0001] The invention belongs to the technical field of low-power concentrating photovoltaics and photovoltaic photothermal comprehensive utilization, and relates to a design method for a line-condensing and symmetrically arranged flat-panel receiving compound parabolic concentrator, in particular to a planar receiving-type compound parabolic concentrator. design method. Background technique [0002] American scholar Winston invented the compound parabolic concentrator (CPC, Compound Parabolic Concentrator) based on the principle of maximum concentration. It was used for ray detection in high-energy physics experiments in the early days, and it began to be used in solar energy technology in 1974. CPC is a non-imaging concentrator designed according to the principle of edge optics. The characteristic of this concentrator is that, within the range of CPC acceptance angle, for any given acceptance angle, the largest thermodynamically possible concentration ratio ...

Claims

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Application Information

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IPC IPC(8): G02B19/00
Inventor 魏进家谢胡凌高阳
Owner XI AN JIAOTONG UNIV
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