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Compound paraboloid condenser

A compound paraboloid and concentrator technology, which is applied in the field of solar energy utilization, can solve the problems of reducing the receiving half-angle, reducing sunlight, reducing optical efficiency, etc., and achieving the effect of expanding the receiving half-angle

Inactive Publication Date: 2010-04-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

[0010] Such a CPC has a non-negligible defect, that is, with the increase of the concentration ratio, the receiving half-angle of the CPC gradually decreases, the sunlight received by the CPC gradually decreases, and the optical efficiency decreases accordingly.

Method used

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Embodiment Construction

[0019] The technical scheme adopted by the present invention to solve the technical problem is: the two curves of ordinary CPC are rotated 2-5 degrees to the direction of the CPC center line around the upper edge points of the ordinary CPC respectively to form a new CPC curve. Fill the dielectric material between the old and new CPC curves, and cover the outer surface of the dielectric with a reflective coating (the coating should be a material with a high reflectance such as space insulation ceramic layer, AP-35, etc.), or add an additional coating to the outer surface of the dielectric A high-quality metal (such as aluminum, iron, etc.) reflective surface, thus forming a new type of CPC concentrator. When the sunlight (within the receiving range) enters the concentrator, it will enter the receiving surface at the bottom of the concentrator after a series of refraction and reflection.

[0020] The above-mentioned dielectric materials should be selected with high transmittance...

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Abstract

The invention relates to a compound paraboloid condenser which belongs to the field of solar energy utilization. An ordinary CPC curve is rotated by 2-5 degrees towards the central line of the condenser around an upper edge point of the CPC curve to form a new CPC curve, wherein the best rotating angle is 3 degrees; and dielectric media are filled between the new curve and the original curve to form a novel CPC condenser. The outer surface of the condenser can achieve sunlight reflection by adopting a metal reflecting plane or a reflecting coating. The novel CPC condenser can achieve the CPC optical efficiency of the same concentrating ratio and increase the receiving half-angle of the compound paraboloid condenser to solar rays.

Description

Technical field [0001] The invention relates to a non-imaging light concentrating device, which belongs to the field of solar energy utilization. Background technique [0002] The Compound Parabolic Concentrator (CPC) was successfully developed by Professor Winston of the University of Chicago in a high-energy physics experiment to detect weak Cherenkov radiation. It is a non-imaging concentrator designed according to the principle of edge optics, which can collect the incident light within a given receiving range to the receiver according to the ideal concentration ratio. It consists of two trough-shaped parabolic reflectors, and the absorber is installed at the bottom. The concentrating ratio it can achieve is generally below 10. The incident sunlight reaches the receiving surface through several reflections in the CPC, with less loss, and can also effectively collect obliquely incident sunlight. This concentrator concentrates light but does not form an image, so it only...

Claims

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Application Information

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IPC IPC(8): G02B19/00F24J2/46H01L31/042H02N6/00H02S40/22
CPCY02E10/40Y02E10/52Y02E10/50
Inventor 黄护林苏跃红高益兵
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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