Lightguide concentrating device

EP4602654A1Pending Publication Date: 2025-08-20R P R ENERGY LTD
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Patent Information

Application Number
EP2023876908
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-10-13
Filing Date
2023-10-10
Publication Date
2025-08-20

AI Technical Summary

Technical Problem

Conventional concentrator photovoltaic systems suffer from significant light losses during the transfer of sunlight through optical fiber waveguides due to absorption, scattering, and radiative losses, limiting their efficiency in capturing diffuse illumination.

Method used

A light concentrating device featuring a nested array of total internally reflecting optical waveguides with hollow cores filled with a gas medium and a highly reflective aluminum cladding, along with planoconvex lenses that focus solar light onto a plane-refracting surface for spectral splitting and efficient transmission to photovoltaic cells.

Benefits of technology

The solution significantly reduces light attenuation and enhances the efficiency of light transmission to solar modules or photovoltaic cells by optimizing the refractive index difference and using a gas medium with a highly reflective coating, thereby improving the overall energy transfer and reducing losses.

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Abstract

Alight-concentrating device for transmitting concentrated light to solar modules comprising: (a) a. light-receiving portion paved with light- concentrating lenses; (b) an outlet portion for transmitting concentrated light to the solar modules; (c) a nested array of total internally reflecting optical waveguides interposed between the light receiving portion and the outlet portion for propagating the received light between the receiving portion and the outlet portion. Each of the pipes- of the nested array has a hollow cladding accommodating a gas medium therewithm. The cladding has a highly reflective coating thereon. The light-concentrating lenses comprise an optical element having convex and plane-refracting surfaces. The plane refracting surface is tilted to an optical axis of the convex surface such that the solar light is spectrally split into a stretched light pattern, which falls on an array of photovoltaic cells having photosensitivity of a locally incident portion of the stretched light pattern.
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