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LCA Case Study to LED Outdoor Luminaries as a Circular Economy Solution to Local Scale
摘要： The replacement of luminaires with discharge lamps with high luminous e?cacy and long life-time LED based equipment is a reality worldwide promoted by policies that favor their gradual substitution. There is a great concern in this manufacturing industry to develop new luminaires with low environmental impact during the manufacturing and transportation processes and its end-of-life disposal (reducing greenhouse gas emissions, toxic or hazardous components, . . . ). Life cycle assessment (LCA) is a very extended tool used to provide information on the quality and quantity of environmental impacts in the life cycle phases of any product, system, or service. This article includes all phases of the LCA analysis of a selected streetlight LED luminaire manufactured by a SME where a land?ll deposit is the end-of-life scenario. In a second phase, alternatives are sought for the reuse of the most signi?cant elements that improve its local economy. The results are classi?ed and sorted according to the ISO 14040 standard.
关键词： LED lighting,streetlight waste,life cycle assessment,recycling,circular economy
更新于2025-09-23 15:19:57
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A Single-Stage LED Streetlight Driver with Soft-Switching and Interleaved PFC Features
摘要： This paper presents a single-stage driver with soft-switching and interleaved power-factor correction (PFC) features suitable for light-emitting diode (LED) energy-saving streetlight applications. The proposed LED streetlight driver integrates an interleaved buck-boost PFC converter with coupled inductors and a half-bridge LLC resonant converter into a single-stage power-conversion circuit with reduced voltage stress on the DC-linked capacitor and power switches, and it is suitable for operating at high utility-line voltages. Furthermore, coupled inductors in the interleaved buck-boost PFC converter are operated in discontinuous-conduction mode (DCM) for accomplishing PFC, and the half-bridge LLC resonant converter features zero-voltage switching (ZVS) to reduce switching losses of power switches, and zero-current switching (ZCS) to decrease conduction losses of power diodes. Operational modes and design considerations for the proposed LED streetlight driver are introduced. Finally, a 144 W (36V/4A)-rated LED prototype driver is successfully developed and implemented for supplying a streetlight module and operating with a utility-line input voltage of 220 V. High power factor, low output-voltage ripple factor, low output-current ripple factor, and high efficiency are achieved in the proposed LED streetlight driver.
关键词： converter,soft-switching,power-factor correction (PFC),streetlight driver,LED
更新于2025-09-19 17:13:59
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Environmental Criteria for Assessing the Competitiveness of Public Tenders with the Replacement of Large-Scale LEDs in the Outdoor Lighting of Cities as a Key Element for Sustainable Development: Case Study Applied with PROMETHEE Methodology
摘要： The technological change to LEDs is an unstoppable reality which, little by little, is becoming increasingly important in terms of the lighting inside and outside our homes. The exterior lighting of our cities is moving decisively and clearly towards the incorporation of this technology in urban spaces. The energy efficiency, light quality, and economic benefits of LED technology are an unquestionable reality. This is causing public administration projects involving large-scale switches to LEDs to be promoted and financed; however, it is beginning to be observed that the commitment to the policies decided by this technology should take into account some environmental aspects which have not been studied to date. The environmental impact of the substitutions is caused by the need to valorize the replaced luminaires. Until now, most have been stored without the possibility of use, reuse, or recovery. The environmental impact produced in the manufacture of LED luminaires that replace the old sodium vapor (VSAP) or metal halide (MH) discharge lamps must also be considered. In addition, in the administrative clauses specifications that govern the public tenders, it is observed that the fundamental environmental aspects both of recycling the old lamps, and of the life cycle analysis (LCA) of the luminaires that are replacing them, have not been contemplated or valued with sufficient weight. In addition, there are very few public substitution contests in which environmental criteria are rewarded or valued in an important way. This work intends to summarize a methodological proposal using the techniques of multiple decision-making criteria for the selection of bidding companies for public outdoor lighting competitions. We propose the use of the PROMETHEE method multi-criteria analysis for the application of the most commonly used criteria for the luminaire LED selection process, including an environmental impact assessment with LCA techniques, and propose this as a case or model guide in the public contests of cities. A model of the bidding conditions that addresses and assesses the environmental aspects which are absolutely key to sustainable development is supported by the ecological criteria of the circular economy.
关键词： environmental criteria,circular economy,Life cycle assessment LCA,lighting pollution,lighting public tender,PROMETHEE,recycling waste,LED luminaires,decision tool,streetlight waste
更新于2025-09-16 10:30:52
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A Single-Stage High-Power-Factor Light-Emitting Diode (LED) Driver with Coupled Inductors for Streetlight Applications
摘要： This paper presents and implements a single-stage high-power-factor light-emitting diode (LED) driver with coupled inductors, suitable for streetlight applications. The presented LED driver integrates an interleaved buck-boost power factor correction (PFC) converter with coupled inductors and a half-bridge-type series-resonant converter cascaded with a full-bridge rectifier into a single-stage power conversion circuit. Coupled inductors inside the interleaved buck-boost PFC converter sub-circuit are designed to operate in discontinuous conduction mode (DCM) for achieving input-current shaping, and the half-bridge-type series resonant converter cascaded with a full-bridge rectifier is designed for obtaining zero-voltage switching (ZVS) on two power switches to reduce their switching losses. Analysis of operational modes and design equations for the presented LED driver are described and included. In addition, the presented driver features a high power factor, low total harmonic distortion (THD) of input current, and soft switching. Finally, a prototype driver is developed and implemented to supply a 165-W-rated LED streetlight module with utility-line input voltages ranging from 210 to 230 V. Experimental results demonstrate that high power factor (>0.99), low utility-line current THD (<7%), low-output voltage ripples (<1%), low-output current ripples (<10%), and high circuit efficiency (>90%) are obtained in the presented single-stage driver for LED streetlight applications.
关键词： converter,streetlight,light-emitting diode (LED),driver
更新于2025-09-12 10:27:22
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[IEEE 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Coimbatore, India (2018.3.1-2018.3.3)] 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Smart Solar Street Light
摘要： Street Lighting is one of the most important and biggest energy consuming departments of the nation. On top of that, the most difficult thing is maintaining them. Consider a situation wherein the streetlight of a locality has stopped working. Now, the people of that area have to call and complain about the same and wait for days to get it repaired, leaving that area dark and socially unsafe. The proposed system consists of a Fault Detection Circuit using two photo sensors in addition with Arduino Uno microcontroller and GSM module [1], which automatically detects the fault in the streetlight. This eliminates manual complaining of the faulty streetlight and initiates sudden repair of the streetlight by the technician, which is being informed by Fault Detection Circuit via text message. Automatic turn ON and turn OFF feature has also been included using two photo sensors which turns ON the streetlight during dark hours and automatically turns OFF the streetlight during light hours. In addition to that, solar panels have been used as source for the streetlight and LED lights have been used for the emission of light, reducing the cost of electricity by 80%.
关键词： Solar Streetlight,Constant Current Charger,Arduino UNO,GSM Module,Automatic Fault Detection
更新于2025-09-04 15:30:14