scholarly journals The development of an optical system for lighting various rooms with sunlight

2021 ◽  
Vol 2086 (1) ◽  
pp. 012144
Author(s):  
I M Gureeva ◽  
V V Davydov ◽  
V Yu Rud
Keyword(s):  
Experimental Study ◽  
Energy Efficient ◽  
Light Guide ◽  
Spectral Composition ◽  
Well Being ◽  
Natural Light ◽  
Angle Of Incidence ◽  
The Sun ◽  
Passive System ◽  
System Operation

Abstract The necessity of using light in the room, the spectral composition of which corresponds to the spectrum of the sun for a comfortable state of a person, is justified. A passive system that does not consume energy is proposed. An energy-efficient natural light system has been developed, creating a comfortable environment for the eyes, well-being and mood of a person. An experimental study of the system operation was carried out. The dependence of the light intensity on the angle of incidence in the light guide is obtained.

Application of Green Lighting Technology in Highway Service – A Case Study of Mt. Lushan West Sea Tourism Highway Service

2014 ◽  
Vol 548-549 ◽  
pp. 1815-1819 ◽  
Author(s):  
Xiao Chun Qin ◽  
She Gang Shao ◽  
Yi Shen
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Energy Savings ◽  
Light Guide ◽  
Operating Costs ◽  
Natural Light ◽  
Lighting Technology ◽  
Lighting Systems ◽  
Service Application

Green lighting technology has the advantages of energy efficiency, friendly environment, safety and comfort. Based on the introduction of green lighting technology, taken the Mt. Lushan West Sea tourist highway service as the case study, we analyzed light guide illumination, the optimum use of natural light and energy efficient lighting respectively from the aspects of technical characteristics and the specific highway service application. We finally made the economic analysis in the energy savings of green lights in the highway service, and the result showed that through the use of green lighting systems Mt. Lushan West Sea tourist highway service could save electricity and reduce operating costs 134,700 Yuan per year.

Sun Load Analysis and Testing on Automotive Front Lighting Products

2020 ◽  
pp. 116-122
Author(s):  
Emre Öztürk ◽  
Mehmet Aktaş ◽  
Tunç Şenyüz
Keyword(s):  
Prolonged Exposure ◽  
Hot Spot ◽  
Load Test ◽  
Angle Of Incidence ◽  
The Sun ◽  
Solar Simulator ◽  
Automotive Lighting ◽  
Inclination Angles ◽  
Plastic Parts ◽  
Load Simulation

The purpose of this research is to reach good correlation between sun load simulation and solar focusing test for exterior automotive lighting products. Light coming from sun is highly collimated (parallel rays) and focusable from lenses with concave structure. Focusing incidence leads to a hot spot on lens surrounding plastic parts which may cause melting failures at high temperature zones. Sun load simulation is performing to eliminate risk of discoloration, deformation, out gassing, coating failures and fire with prolonged exposure from field. Irradiance values in W/m2 defined in simulation as heat source depending of an angle of incidence of the sun radiation. At first step, simulation is performing with 5 degree intervals to define the critical zones then intervals decreased to 2 degree to detect the critical azimuth and inclination angles. Critical azimuth and inclination angles is checking with ray trace analysis to check the bouncing of sun rays and possible solution to eliminate focuses with design solutions. After numerical analysis to release and validate the automotive lighting products regarding the sun load test, measurement with first parts is necessary. Measurement is performing for all critical angles which have been detected at simulation with thermal camera under ultra high-collimation solar simulator. Measured temperatures are settled according to environment conditions and correlation is checking with simulations.

scholarly journals Solar Tracker

2020 ◽  
Vol 2 (1) ◽  
pp. 59-65
Author(s):  
Irfan Danial Hashim ◽  
Ammar Asyraf Ismail ◽  
Muhammad Arief Azizi
Keyword(s):  
Fossil Fuels ◽  
Electrical Energy ◽  
Maximum Amount ◽  
Solar Panel ◽  
Angle Of Incidence ◽  
The Sun ◽  
Continuous Change ◽  
The Earth ◽  
Solar Tracker ◽  
Rotation Of The Earth

Solar Tracker The generation of power from the reduction of fossil fuels is the biggest challenge for the next half century. The idea of converting solar energy into electrical energy using photovoltaic panels holds its place in the front row compared to other renewable sources. But the continuous change in the relative angle of the sun with reference to the earth reduces the watts delivered by solar panel. Conventional solar panel, fixed with a certain angle, limits their area of exposure from the sun due to rotation of the earth. Output of the solar cells depends on the intensity of the sun and the angle of incidence. To solve this problem, an automatic solar cell is needed, where the Solar Tracker will track the motion of the sun across the sky to ensure that the maximum amount of sunlight strikes the panels throughout the day. By using Light Dependent Resistors, it will navigate the solar panel to get the best angle of exposure of light from the sun.

Light and the Optical Environment

2014 ◽  
Author(s):  
Thomas W. Cronin ◽  
Sönke Johnsen ◽  
N. Justin Marshall ◽  
Eric J. Warrant
Keyword(s):  
Deep Sea ◽  
Natural Light ◽  
The Sun ◽  
Ambient Light

This chapter explains how humans, and nearly all animals on Earth, witness astonishing variation in their optical environment. Brightness changes by many orders of magnitude each day, and colors also shift dramatically. Those animals that enter forests and especially the water experience even larger changes. Given this, it is surprising that nearly all the natural light on Earth ultimately comes from two sources, the sun and bioluminescence. A final source of light that is potentially relevant to vision is mechanoluminescence. In this process, light is produced by mechanical processes, including deformation (piezoluminescence), fracturing (triboluminescence), and crystallization (crystalloluminescence). The latter two have been suggested as being at least partially responsible for ambient light at deep-sea vents.

Edge-lighting Natural Light Flat Panel Light without Light Guide Plate

2015 ◽  
Vol 44 (7) ◽  
pp. 722002
Author(s):  
马丙戌 MA Bing-xu ◽  
文尚胜 WEN Shang-sheng ◽  
陈颖聪 CHEN Ying-cong ◽  
刘磊 LIU Lei
Keyword(s):  
Light Guide ◽  
Natural Light ◽  
Flat Panel ◽  
Panel Light ◽  
Light Guide Plate ◽  
Guide Plate
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