Abstract
In the case of light-emitting diode (LED) seaport luminaires, they should be designed in consideration of glare, average illuminance, and overall uniformity. Although it is possible to implement light distribution through auxiliary devices such as reflectors, it means increasing the weight and size of the luminaire, which reduces the feasibility. Considering the special environment of seaport luminaires, which are installed at a height of 30 m or more, it is necessary to reduce the weight of the device, facilitate replacement, and secure a light source with a long life. In this paper, an optimized lens design was investigated to provide uniform light distribution to meet the requirement in the seaport lighting application. Four types of lens were designed and fabricated to verify the uniform light distribution requirement for the seaport lighting application. Using numerical analysis, we optimized the lens that provides the required minimum overall uniformity for the seaport lighting application. A theoretical analysis for the heatsink structure and shape were conducted to reduce the heat from the high-power LED light sources up to 250 W. As a result of these analyses on the heat dissipation characteristics of the high-power LED light source used in the LED seaport luminaire, the heatsink with hexagonal-shape fins shows the best heat dissipation effect. Finally, a prototype LED seaport luminaire with an optimized lens and heat sink was fabricated and tested in a real seaport environment. The light distribution characteristics of this prototype LED seaport luminaire were compared with a commercial high-pressure sodium luminaire and metal halide luminaire.
Highlights
Conventional lighting sources for general lighting applications have been replaced quickly by light-emitting diode (LED)-based light sources
In the case of a conventional seaport luminaire, based on high-intensity discharge (HID) technology such as metal halide and high-pressure sodium lamps, due to glare, the eyestrain of port workers and navigators is at a considerable level [13]
We intend to provide the appropriate light distribution characteristics required in a seaport through optimal lens design, and to solve the heat dissipation problem caused by the use of a high-power light source through heat sink optimization
Summary
Conventional lighting sources for general lighting applications have been replaced quickly by LED-based light sources. In order to improve this kind of situation, efforts are being made to solve the problem by installing reflectors and beam-blocking brackets in the luminaire These kinds of solutions reduce the efficiency of the light source and subsequently increase the volume, weight, and price of the luminaire, too. Upon implementing a high-power LED light source, the heat dissipation problem of the corresponding lighting fixture is being raised as a key point, as it is inevitable to replace the LED lighting that replaces it with a conventional 500 W class luminaire in the seaport. We intend to provide the appropriate light distribution characteristics required in a seaport through optimal lens design, and to solve the heat dissipation problem caused by the use of a high-power light source through heat sink optimization. Theoretical Analysis and Fabrication of Lens and Heatsink for the Seaport Luminaire
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
