Designs of solar collector for Hybrid Fiber Optic Lighting system

2010 ◽  
Author(s):  
Patrick Couture ◽  
Mohammed Mostefa ◽  
Abdul Al-Azzawi
Keyword(s):  
Solar Collector ◽  
Fiber Optic ◽  
Lighting System ◽  
Hybrid Fiber

Spectral Transmission of a Solar Collector and Fiber Optic Distribution Hybrid Lighting System

2007 ◽  
Author(s):  
L. C. Maxey ◽  
J. E. Parks ◽  
D. L. Beshears ◽  
D. D. Earl ◽  
M. V. Lapsa ◽  
...  
Keyword(s):  
Solar Energy ◽  
Hybrid System ◽  
Solar Collector ◽  
Fiber Optic ◽  
Renewable Energy Sources ◽  
Solar Spectrum ◽  
Solar Light ◽  
Spectral Transmission ◽  
Lighting System ◽  
Nir Light

Increased use of solar energy will reduce requirements for non-renewable energy sources such as fossil fuels and reduce associated greenhouse gas emissions. The benefits of replacing fossil-based energy with solar energy are often dependent on the application and operational or duty cycle for power demand. One particularly efficient use of solar energy is hybrid lighting. In hybrid lighting, solar light is concentrated into optical fibers and then coupled with supplemental electrical lighting to maintain a constant level of illumination. The system is able to offer reliable lighting with less energy consumption from the electrical grid (which is often driven by non-renewable sources). This technique offers energy efficiency benefits since the solar light is used directly and suffers no conversion losses. Furthermore, the solar spectrum provides an illumination that lighting engineers value for it’s quality; office inhabitants appreciate for its comfort; and retailers believe leads to increased sales. When available solar light is low, the hybrid system allows traditional light sources to reliably meet lighting demands. The success of the solar hybrid lighting system is dependent on the collection and transmission efficiency of the system. In this study, the spectral transmission of a hybrid lighting system is characterized. The system is composed of a 200-sun concentration reflective solar collector and a plastic fiber optic distribution network. The ultraviolet (UV), visible, and near-infrared (NIR) spectral transmission was characterized over a spectral range of 200 nm to 2400 nm. The UV and NIR performance of the system is critical since optical fiber damage can be caused by both UV and NIR light; thus, optimal system design maximizes the collection and transmission of visible light while minimizing the transmission of the UV and NIR light. Spectral transmission data for all components in the hybrid system are presented, and performance properties relative to solar applications are discussed.

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

Development of a Fiber-Optic Hybrid Day-Lighting System for Mobile Shelter Applications

2017 ◽  
Author(s):  
Sean Lawless ◽  
Ravi Gorthala
Keyword(s):  
Solar Collector ◽  
Fiber Optic ◽  
Tracking System ◽  
Light Output ◽  
Fresnel Lens ◽  
Wind Loading ◽  
Lighting System ◽  
Tracking Accuracy ◽  
Fiber Optic Cable ◽  
Fresnel Lenses

This paper discusses a Fiber-Optic Hybrid Day-Lighting system that can cut energy consumed by buildings for lighting significantly. This system is designed for mobile applications such as military shelters. The system is comprised of two primary components: the solar collector and the Solar Hybrid Lighting Fixture. The first component, the solar collector, consists of a housing, structural stand, a dual axis tracking system, Fresnel Lenses, secondary optics, and fiber-optic cables. The collector is integrated into a dual-axis tracker, which is then mounted on a tripod. The tripod can be staked into the ground and weighed down to protect the system from any wind loading and the collector height can be adjusted so that there is no shading of the collector by nearby structures. The collector with an aluminum housing holds eight 10-inch diameter Fresnel Lenses that focus sunlight onto eight secondary optics based on TIR (total internal reflection) which filter UV/IR and deliver uniform light to the fiber-optic cables. The secondary optic is coupled to the fiber-optic cable with index matching gel so that Fresnel reflection losses are minimized. The solar collector tracks the sun’s movement through the day with a dual-axis tracker (azimuth/tilt), ensuring the light is concentrated into the fiber-optic cables. The optics has been designed to have a high half-acceptance of 1.75° and can accommodate a tracking accuracy of 1.50° or better. The opposite end of the fiber-optic cable attaches to the second part of the Day-Lighting system, the Solar Hybrid Light Fixture (SHLF). The SHLF comprises of two lighting systems: 1) a solar fiber-optic system and 2) an LED system. The fiber-optic cable is coupled to an acrylic light diffusing rod that evenly delivers the light into the room. During sunny periods, depending on the length of the cable, solar fiber-optic lighting could provide full illumination of the space. In order to keep lighting uniform even during fluctuations of the light output from the sun during cloudy periods, the LED portion of the light will allow for constant lighting at a lower power consumption. The LED lighting has dimming capabilities due to a photosensor that regulates the light output of the LEDs based on how much solar light is delivered by the fiber-optic cables. On a typical sunny day with an overall concentration factor of ∼400 from the Fresnel Lens system to the optical fiber, it is possible to generate an output of 2,000 lumens with a 20-foot cable, with each fiber-optic cable experiencing a 1% loss of light per foot of cable. The LED portion of the hybrid light fixture produces about 1,800 lumens as well.

scholarly journals Design and Development of a Fiber-Optic Hybrid Day-Lighting System

2018 ◽  
Vol 140 (2) ◽  
Author(s):  
Sean Lawless ◽  
Ravi Gorthala
Keyword(s):  
Solar Collector ◽  
Fiber Optic ◽  
Tracking System ◽  
Prototype System ◽  
Total System ◽  
Light Weight ◽  
Lighting System ◽  
Tracking Accuracy ◽  
Acceptance Angle ◽  
Fresnel Lenses

The primary objective of this study was to develop a fiber-optic hybrid day-lighting system for mobile application such as military shelters in order to cut energy use and the use of fossil fuels. The scope included the design, development, and testing of a hybrid lighting system that is capable of producing about 16,000 lm output with design challenges including light-weight, compactness, and optics that can tolerate a high tracking misalignment. The designed system is comprised of two subsystems: the solar collector and the solar hybrid lighting fixture (SHLF). The solar collector, consists of a housing, a structural stand (tripod), a dual axis tracking system, Fresnel lenses, secondary optics, and fiber-optic cables. The collector is a telescoping aluminum box that holds eight 10-in diameter Fresnel lenses, which focus sunlight onto eight secondary optics and deliver uniform light to the fiber-optic cables. The secondary optics have filters to block UV/IR. The optics has been designed to have a high half-acceptance angle of 1.75 deg and can accommodate a tracking accuracy of 1.50 deg or better. This novel SHLF consists of two components: a solar fiber-optic system and a light emitting diode (LED) system. The fiber-optic cable is coupled to an acrylic light diffusing rod that delivers the sunlight into the room. During sunny periods, the solar fiber-optic lighting could provide full illumination level. In order to keep the same level of lighting during cloudy periods, the LED portion of the light fixture can supplement the output of the SHLF. A compact, light-weight prototype system was built and tested. The results showed that the system's output per lens for the 20 ft cable was about 1750±50 lm at a global solar illuminance of 115,000 lx. The total system was capable of delivering 14,000 lm of sunlight.

Fiber optic lighting system for plant production

1991 ◽  
Author(s):  
Dennis R. St. George ◽  
John J. R. Feddes
Keyword(s):  
Fiber Optic ◽  
Plant Production ◽  
Lighting System

Hybrid fiber optic sensors

1990 ◽  
Vol 88 (S1) ◽  
pp. S65-S65
Author(s):  
James Lenz ◽  
Paul Bjork
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Hybrid Fiber

Hybrid Fiber Optic Probe for Fluidized Gas-Solid Beds

2016 ◽  
Author(s):  
Jorge Luis Galvis-Arroyave ◽  
Alejandro Molina ◽  
Pedro Torres
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Probe ◽  
Hybrid Fiber ◽  
Optic Probe

Low crosstalk hybrid fiber optic sensor based on surface plasmon resonance and MMI

2019 ◽  
Vol 45 (1) ◽  
pp. 117 ◽  
Author(s):  
Yi Duo ◽  
Chen Yuzhi ◽  
Geng Youfu ◽  
Teng Fei ◽  
Li Yong ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Hybrid Fiber ◽  
Optic Sensor
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