scholarly journals Evaluation of a large dish-type concentrator solar lighting system for underground car park

2018 ◽  
Vol 42 (6) ◽  
pp. 2234-2245 ◽  
Author(s):  
Duofu Song ◽  
Hui Lv ◽  
Jun Liao ◽  
Wenjuan Huang ◽  
Sihao Huang ◽  
...  
Keyword(s):  
Lighting System ◽  
Car Park ◽  
Solar Lighting

Cost-Effective Light-Mixing Module for Solar-Lighting System Appended With Auxiliary RGBW Light-Emitting Diodes

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
An Chi Wei ◽  
Shih Chieh Lo ◽  
Ju-Yi Lee ◽  
Hong-Yih Yeh
Keyword(s):  
Light Source ◽  
Light Emitting Diodes ◽  
Cylindrical Tube ◽  
Cost Effective ◽  
Lighting System ◽  
Optical Efficiency ◽  
Light Emitting ◽  
Solar Lighting ◽  
Lighting Systems ◽  
Main Components

A light-mixing module consisting of a compound parabolic concentrator (CPC) and a light-mixing tube is proposed herein to realize a uniform and efficient solar-lighting system. In this lighting system, the sunlight collected into a fiber and then guided to an indoor destination is the principal light source, while an auxiliary light source including multiple red, green, blue, and white (RGBW) light-emitting diodes (LEDs) is controlled by an auto-compensating module. To mix the principal and the auxiliary sources and to realize the uniform illumination, the light-mixing tube was coated with BaSO4 and optimized as a cylindrical tube. The design of the light-mixing tube is described and discussed in this article. According to the simulated results, the uniformity and the optical efficiency of the designed light-mixing tube are 82.9% and 85.7%, respectively, while from the experimental results, the uniformity of 85.9% and the optical efficiency of 83.3% have been obtained. In terms of the common indoor-lighting standards and the specifications of commercial components used in lighting systems, the proposed light-mixing module has demonstrated the high uniformity and acceptable optical efficiency. Additionally, since the main components of the light-mixing module can be designed as plastic optics, a cost-effective light-mixing module and a profitable lighting system can be realized. Thus, the performance and the price of the proposed light-mixing module fit the demands of the illumination market, while the proposed system shows the potential for indoor solar-lighting applications.

Development and Performance Analysis of a Hybrid Solar Lighting System

KIEAE Journal ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 71-76
Author(s):  
Yeong-Min Kim ◽  
Won-Gee Chun
Keyword(s):  
Performance Analysis ◽  
Lighting System ◽  
Solar Lighting ◽  
And Performance

Research on Intelligent Controller of Solar Lighting System

2012 ◽  
Vol 220-223 ◽  
pp. 1138-1141
Author(s):  
Xing Qiao Liu ◽  
Yan Chen
Keyword(s):  
Control Circuit ◽  
Lighting System ◽  
Battery Charge ◽  
Intelligent Controller ◽  
Solar Lighting ◽  
Working Principle ◽  
Protection Circuit ◽  
Battery Discharge ◽  
Vrla Battery ◽  
Lead Acid

After discussing the charging and discharging characteristics of valve regulated lead acid(VRLA) battery, we described the working principle of UC3906. Then designed the controller of 12V battery charge circuit, 12V battery discharge protection circuit and lamp detection control circuit. This controller achieved automatic switch of lighting system, it could efficiently charge the battery and avoid over-charge or over-discharge. The result showed that this controller extend the life of the battery.

scholarly journals Design of an automatic solar lighting system

2018 ◽  
Vol 9 (5S) ◽  
pp. 1097
Author(s):  
S.S. Rais ◽  
N.I.M. Enzai ◽  
N Ahmad ◽  
N Ahmed ◽  
R Darus ◽  
...  
Keyword(s):  
Lighting System ◽  
Solar Lighting

scholarly journals Design of a Hybrid Fiber Optic Daylighting and PV Solar Lighting System

2018 ◽  
Vol 145 ◽  
pp. 586-591 ◽  
Author(s):  
Yuexia Lv ◽  
Longyu Xia ◽  
Jinyue Yan ◽  
Jinpeng Bi
Keyword(s):  
Fiber Optic ◽  
Lighting System ◽  
Hybrid Fiber ◽  
Solar Lighting

Tracking Solar Lighting System for Core Building Spaces and Underground Ones

2017 ◽  
Author(s):  
William Ross McCluney ◽  
Larry Kinney ◽  
John Hutson
Keyword(s):  
Lighting System ◽  
Solar Lighting

Initial Results From an Experimental Hybrid Solar Lighting System in a Commercial Building and Overview of Related Value Propositions

Solar Energy ◽  
2003 ◽  
Author(s):  
Jeff Muhs ◽  
Duncan Earl ◽  
Dave Beshears ◽  
Curt Maxey
Keyword(s):  
Optical Fibers ◽  
Electrical Power ◽  
Color Space ◽  
Color Temperature ◽  
Atmospheric Conditions ◽  
Lighting System ◽  
Commercial Building ◽  
Preliminary Results ◽  
Value Propositions ◽  
Solar Lighting

This paper describes preliminary results from research on a new hybrid solar lighting (HSL) system being developed to reduce electric lighting in commercial office buildings. A physical description of HSL system components along with preliminary results from an experimental system deployed in a commercial building in Knoxville, TN are provided. Results from a systems-level, chromaticity model are compared with experimental data. A total lumen distribution efficiency of over 50% was recorded for the initial prototype having optical fibers an average of 6 m (19.5 ft) in length. The total electrical power displacement of the 1 m2 HSL proof-of-concept prototype is estimated to be between 522–2350 watts per 1000 W/m2 of incident solar radiation on the collector depending on the type of electric lights being used in conjunction with the solar lighting system. By adding the reductions in heat gain associated with reduced electric lamp use and predicted performance improvements achieved by a system redesign, the electrical power displaced in a commercial prototype could rise to between 702–3160 W (peak)/m2 of collected sunlight not including any additional electrical power that can be generated using the otherwise wasted IR energy. The color temperature of the distributed sunlight emerging from the optical fibers is approximately 5100°K and the chromaticity values in uniform color space (u′v′) are approximately (.2010, .4977). These values match well with modeled results and will vary slightly depending on the day, time, atmospheric conditions, and system configuration. The paper concludes with a discussion of new value propositions that HSL provides architects, energy providers, building owners, and occupants and briefly outlines anticipated disadvantages.

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