The Design Of High Power LED Street Lamps

Energy is both the foundation of the development of national economy andsignificant restraint factors of sustainable development of regional economy. Owning tothe world energy crisis, the Chinese energy situation becomes more severe and lightingenergy saving is an effective way to achieve national energy saving. China is thesecondary power generation country that is just behind the United States. The powergeneration in2004is21900TWh, the power consumption of illumination is2624TWh,which accounts for12%. Up to2010, the power consumption of illumination reaches15%of the total power consumption. As the world’s recognized fourth generationlighting source, LED plays a remarkable role to reduce the consumption of energy andcarbon emissions. It is predicted that the annual energy saving of Chinesesemiconductor lighting will exceeds the total power generation in Three Gorges PowerStation.With the modern background of worldwide energy scarcity, this paper presents thedevelopment status and tendency of the domestic and overseas LED street lamps, andfurther discusses the design methods and system structures of the LED street lampsthrough the particular analysis of the basic LED knowledge and road lighting planning.This paper proposes a novel optical lens lighting scheme based on the primarydescription of the secondary lighting distribution theory in the LED street lamps. Theproposed scheme further optimizes the current LED lighting distribution techniques,builds the3D model of the new improved lens by applying the SolidWorks software,tracks the light ray and simulates the practical illuminance in the plane of illuminationby applying the LightTools software. The results obtained indicates that the proposedscheme can improve the lighting illuminance and uniformity substantially and increasesthe lamp spacing distance from typical40m to50m, which is favorable for reducingthe required installation number and capital cost of the lamps. Various significantapplication advantages of the proposed scheme, e.g., technical specifications, capitalcost, have been further verified by the comparative analysis on the simulated resultsbetween the proposed scheme and the current LED lighting distribution scheme. Finally, this paper presents the engineering design processes and methods of the LED streetlamps, discusses the system test techniques and approaches based on the DIAluxsimulation analysis of the practical street illuminance, and further analyzes theexperimental results to acquire the integrated performance criteria and relevantconclusions.