Monitoring of a small top lighting solar light pipe system

2009 ◽  
Author(s):  
Yanpeng Wu ◽  
Zhiyou Yue ◽  
Rendong Jin ◽  
Li Liu
Keyword(s):  
Solar Light ◽  
Pipe System ◽  
Light Pipe

Experimental Study on Performance of Top Lighting Solar Light Pipes in the Meeting Room in Winter in Beijing

2012 ◽  
Vol 178-181 ◽  
pp. 29-32 ◽  
Author(s):  
Yan Peng Wu ◽  
Hong Li
Keyword(s):  
Experimental Study ◽  
Energy Consumption ◽  
Daily Life ◽  
Solar Light ◽  
Design Criteria ◽  
Artificial Light ◽  
Light Sources ◽  
Experimental Time ◽  
Light Pipe ◽  
Meeting Room

The lighting performance of top lighting solar light pipe in the meeting room in winter in Beijing has been measured under sunny and cloudy conditions to analyze whether the top solar light pipe can satisfy the general jobs lighting or not. The results showed that the indoor maximum and minimum illuminance were 163.2 lux and 115.4 lux respectively and the average illuminance was 147.8 lux in one day. The simulated average illuminance is 113lx in the same experimental time. It can satisfy the design criteria requirements and generally meet the basic for the meeting rooms. The light pipe can be the accessorial illuminance equipment to substitute partial or total artificial light sources in daily life to decrease the energy consumption of lighting.

Hyperbaric Chamber Lighting

1974 ◽  
Vol 96 (1) ◽  
pp. 281-284 ◽  
Author(s):  
J. M. Canty
Keyword(s):  
Light Source ◽  
Vessel Wall ◽  
Hyperbaric Chamber ◽  
Small Opening ◽  
Pipe System ◽  
Light Pipe ◽  
Electrical Systems

Internal electrical systems have been the cause of some very serious accidents in hyperbaric chambers. This paper describes a new “light pipe” system which can be installed in a very small opening in the vessel wall. Most of the IR energy is intercepted before the light enters the chamber resulting in a cool light source, simple to install and maintain. A description of the system is presented along with performance for several light pipe configurations.

Energy saving potential of tubular light pipe system with different colors on internal surfaces

2019 ◽  
Vol 14 (4) ◽  
pp. 793-837
Author(s):  
Abdus Salam Azad ◽  
Mohd Salman ◽  
S.C. Kaushik ◽  
Dibakar Rakshit
Keyword(s):  
Prediction Models ◽  
Residential Buildings ◽  
Mean Bias Error ◽  
Bias Error ◽  
New Delhi ◽  
Content Type ◽  
Pipe System ◽  
Solar Altitude ◽  
Light Pipe ◽  
Different Seasons

Purpose Lighting in building sectors (consumes the highest energy in commercial buildings and the second highest in residential buildings in India) has very much potential for energy conservation in buildings. With the use of daylighting system, energy consumption in lighting can be lowered up to 30 to 40 per cent. Design/methodology/approach An experimental effort has been made in this paper to explore the internal wall coloring effect on the performance of tubular light pipe. Trace-pro software has been used and validated. With the help of this software, light pipe has been designed and simulated in a ray tracing mode. Assessment of four globally used prediction models has also been conducted to compare the performances in different seasons for light pipes in the composite climate of New Delhi. Findings It has been conducted based on three statistical indicators as mean bias error, root mean square error and R2. Using regression, an empirical model for average internal illuminance has been developed as a function of light reflectance value (LRV) and solar altitude angle. Trace-pro results confirmed that maximum internal illuminance can be obtained with wall surfaces coated with high LRV color. Finally, by using of a single light pipe system for a test room with the artificial lighting system and applying continuous dimming control, the amount of electrical energy has been saved up to 38.5 per cent per year. Originality/value After going through the literature, it has been identified that there has been no paper published which explores the effect of colors of the internal walls on the performance of the light pipe. Along with this, the comparison between existing empirical performance models and find out which model gives the best result in different seasons has been carried out for New Delhi, India.

An innovative vehicle headlamp design based on a high-efficiency LED light pipe system

2013 ◽  
Vol 47 (2) ◽  
pp. 210-220 ◽  
Author(s):  
AJW Whang ◽  
KC Jhan ◽  
SM Chao ◽  
GW Chen ◽  
CH Chou ◽  
...  
Keyword(s):  
High Efficiency ◽  
Led Light ◽  
Pipe System ◽  
Light Pipe

Solar Light Pipe Combined with Photocatalysis to Decompose Formaldehyde under Sunny Conditions in Summer in Beijing

2008 ◽  
Vol 28 (12) ◽  
pp. 2408-2415 ◽  
Author(s):  
吴延鹏 Wu Yanpeng ◽  
王晓东 Wang Xiaodong ◽  
马重芳 Ma Chongfang
Keyword(s):  
Solar Light ◽  
Light Pipe

Solar Light-Vent Pipe Systems: Create Good Building Luminous Environment and Indoor Air Quality

2011 ◽  
Vol 374-377 ◽  
pp. 639-642
Author(s):  
Yan Peng Wu ◽  
Zhi You Yue
Keyword(s):  
Air Quality ◽  
Research And Development ◽  
Energy Saving ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Natural Ventilation ◽  
Solar Light ◽  
Future Prospects ◽  
Pipe System ◽  
Pipe Systems

Solar light-vent pipe system, which is a new kind of green, ecological, energy-saving construction equipment, combining natural ventilation with solar light pipe, can not only improve the architecture luminous environment, but also optimize indoor air quality. This study introduces solar light-vent pipe systems theories and the related technical key point to combine natural ventilation with solar light pipes, gives an overview of the research and development of solar light-vent pipe systems and discusses the current situation and future prospects.

Monitoring and Evaluation of a Light-pipe System used in Korea

2010 ◽  
Vol 19 (1) ◽  
pp. 129-136 ◽  
Author(s):  
Geun Young Yun ◽  
Hwa Young Shin ◽  
Jeong Tai Kim
Keyword(s):  
Monitoring And Evaluation ◽  
Pipe System ◽  
Light Pipe
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