scholarly journals Life Cycle Assessment of Incandescent, Fluorescent, Compact Fluorescent and Light Emitting Diode Lamps in an Indian Scenario

Procedia CIRP ◽  
2014 ◽  
Vol 15 ◽  
pp. 467-472 ◽  
Author(s):  
Kuldip Singh Sangwan ◽  
Vikrant Bhakar ◽  
Shilpa Naik ◽  
Sylvi Nazareth Andrat
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Indian Scenario

scholarly journals Comparative Life Cycle Assessment of Lighting Systems and Road Pavements in an Italian Twin-Tube Road Tunnel

2018 ◽  
Vol 10 (11) ◽  
pp. 4165 ◽  
Author(s):  
Giuseppe Cantisani ◽  
Paola Di Mascio ◽  
Laura Moretti
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Light Emitting Diode ◽  
Road Construction ◽  
Road Tunnel ◽  
Light Emitting ◽  
Pavement Materials ◽  
Environmental Consequences ◽  
Lighting Systems ◽  
Reflecting Surface

This work calculates and discusses the Life Cycle Assessment (LCA) of four scenarios composed of two types of road pavements and two types of lighting systems to be built in an Italian twin-tube road tunnel. A 20-year time horizon is adopted to assess the burdens of construction and maintenance of both flexible and rigid pavements and high-pressure sodium (HPS) and light-emitting diode (LED) lamps, traffic, and switching on of lamps. All considered scenarios are comparable with each other in terms of technical performances, but significantly differ regarding their environmental consequences. The geometrical and technical characteristics of the examined scenarios comply with current Italian standards for highways. In all the examined cases, LCA is carried out according to the European standard, EN 15804, and includes 19 impact categories (IC). The analysis demonstrates that the use of more reflecting surface pavement materials (i.e., concrete vs. asphalt) and more performing lighting systems (i.e., LED vs. HPS) can effectively mitigate the deleterious burdens related to road construction, maintenance, and use. For most of the examined ICs, the most environment-friendly scenario has LED lamps and concrete pavement.

Life cycle assessment of light-emitting diode downlight luminaire—a case study

2013 ◽  
Vol 18 (5) ◽  
pp. 1009-1018 ◽  
Author(s):  
Leena Tähkämö ◽  
Manuel Bazzana ◽  
Pierre Ravel ◽  
Francis Grannec ◽  
Christophe Martinsons ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Light Emitting Diode ◽  
Light Emitting

scholarly journals Analyzing Thermal Module Developments and Trends in High-Power LED

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Jung-Chang Wang
Keyword(s):  
Life Cycle ◽  
High Power ◽  
Light Emitting Diode ◽  
Junction Temperature ◽  
Light Emitting ◽  
Consumer Electronic ◽  
High Power Led ◽  
Fin Thickness ◽  
Good Agreement ◽  
Indoor And Outdoor

The solid-state light emitting diode (SSLED) has been verified as consumer-electronic products and attracts attention to indoor and outdoor lighting lamp, which has a great benefit in saving energy and environmental protection. However, LED junction temperature will influence the luminous efficiency, spectral color, life cycle, and stability. This study utilizes thermal performance experiments with the illumination-analysis method and window program (vapour chamber thermal module, VCTM V1.0) to investigate and analyze the high-power LED (Hi-LED) lighting thermal module, in order to achieve the best solution of the fin parameters under the natural convection. The computing core of the VCTM program employs the theoretical thermal resistance analytical approach with iterative convergence stated in this study to obtain a numerical solution. Results showed that the best geometry of thermal module is 4.4 mm fin thickness, 9.4 mm fin pitch, and 37 mm fin height with the LED junction temperature of 58.8°C. And the experimental thermal resistances are in good agreement with the theoretical thermal resistances; calculating error between measured data and simulation results is no more than ±7%. Thus, the Hi-LED illumination lamp has high life cycle and reliability.

Estimating Fatality and Injury Savings Because of Deployment of Advanced Wrong-Way Driving Countermeasures on a Toll Road Network

2021 ◽  
pp. 036119812098657
Author(s):  
Adrian Sandt ◽  
Haitham Al-Deek
Keyword(s):  
Life Cycle ◽  
Capital Investment ◽  
Road Network ◽  
Light Emitting Diode ◽  
Night Time ◽  
Light Emitting ◽  
Limited Access ◽  
Toll Road ◽  
Improved Performance ◽  
Benefit Cost

Limited access facility wrong-way driving (WWD) crashes are typically more severe than other crashes. Deploying advanced WWD countermeasures, such as rectangular flashing beacon (RFB) and light-emitting diode (LED) technologies, at exit ramps can reduce WWD crashes, injuries, and fatalities. No previous research has developed a methodology to quantify the potential fatality and injury savings because of future countermeasure deployments. This paper developed such a methodology and applied it to Florida’s Turnpike Enterprise (FTE) toll road network. From 2011–2016, there were 53 FTE WWD crashes, resulting in 16 fatalities and annual injury costs of $37 million. The proportion of these crashes occurring during night-time was 87%. RFB and LED life-cycle injury savings and costs were determined for all 216 FTE exits. The total savings were $424 million for RFBs (benefit–cost [B/C] ratio of 23.20) and $144 million for LEDs (B/C ratio of 13.13). Deploying countermeasures at the 103 exits with the highest B/C ratios would provide 70% of the total possible savings by equipping 40% of the ramps. For the same capital investment, RFBs provide more savings than LEDs. Spending $1 million to deploy RFBs will provide similar savings as spending $3.4 million to deploy LEDs. Evaluating the existing FTE RFB and LED ramps shows that RFBs are more effective at night-time and can provide three times the savings of LEDs. The results of this paper show the improved performance of RFBs over LEDs and provide an example that other agencies could follow to identify savings and cost-effectively deploy advanced WWD countermeasures.

Life Cycle Assessment of Lighting Systems and Light Loss Factor: A Case Study for Indoor Workplaces in France

Electronics ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 1278 ◽  
Author(s):  
Bertin ◽  
Canale ◽  
Ben Abdellah ◽  
Mequignon ◽  
Zissis
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Loss Factor ◽  
Sustainability Assessment ◽  
Human Impacts ◽  
Light Emitting Diode ◽  
Light Loss ◽  
Lighting Systems ◽  
Definition Of ◽  
Whole Life Cycle

Life cycle assessment (LCA) methodology has been used to evaluate the performance of the following lighting systems: compact fluorescent lamps (CFL), light-emitting diode (LED) lamps, and fluorescent tubes (T5 type). This work covers the singularity of the French electricity mix for indoor workplaces lighting and describes the best strategy for lamp replacement. We have defined the light loss factor to integrate the following additional parameters: lumen depreciation, dirt accumulation, and risks of failure. Therefore, we propose a new definition of the functional unit (maintained megalumen hour), and we conduct this assessment to be compliant with the standards of lighting system equipment (NF EN 12464-1). Unlike previous studies, we observed that the manufacturing phase is the most impacting over the whole life cycle, thus making the extension of LED lamps’ lifetime a more effective strategy to reduce the potential environmental impacts than increasing their efficacy. This paper highlights how the light loss factor affects the LCA results and proves that it should be taken into account for subsequent assessments. Finally, this new approach includes the real usage of the lamps in the study and contributes to lay the foundation for life cycle sustainability assessment to also evaluate the economic, social, and human impacts of lighting.

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