Hybrid sunlight/LED illumination and renewable solar energy saving concepts for indoor lighting

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50983

Title:	Hybrid sunlight/LED illumination and renewable solar energy saving concepts for indoor lighting
Authors:	Tsuei,CH;Sun,WS;Kuo,CC
Contributors:	光電科學與工程學系
Keywords:	CONCENTRATORS;EFFICIENCY;CELL
Date:	2010
Issue Date:	2012-03-27 18:14:34 (UTC+8)
Publisher:	國立中央大學
Abstract:	A hybrid method for using sunlight and light-emitting diode (LED) illumination powered by renewable solar energy for indoor lighting is simulated and presented in this study. We can illuminate an indoor space and collect the solar energy using an optical switching system. When the system is turned off, the full spectrum of the sunlight is concentrated by a concentrator, to be absorbed by solar photovoltaic devices that provide the electricity to power the LEDs. When the system is turned on, the sunlight collected by the concentrator is split into visible and non-visible rays by a beam splitter. The visible rays pass through the light guide into a light box where it is mixed with LED light to ultimately provide uniform illumination by a diffuser. The non-visible rays are absorbed by the solar photovoltaic devices to provide electrical power for the LEDs. Simulation results show that the efficiency of the hybrid sunlight/LED illumination with the renewable solar energy saving design is better than that of LED and traditional lighting systems. (C) 2010 Optical Society of America
Relation:	OPTICS EXPRESS
Appears in Collections:	[Department of Optics and Photonics] journal & Dissertation

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