| 词条 | Solar traffic light |
| 释义 |
FeaturesMost solar traffic lights use LED lamps as they are more reliable[1] and have more advantages over other lighting devices like CFL lamps as they are more energy efficient, have a longer life span and turn on and turn off quickly.[2] Solar traffic lights contain enclosures which house the batteries and the control panel circuitry.[3] Existing traffic lights can also be upgraded with an auxiliary power source using solar panels for use during power failures.[4] The other parts in a solar traffic light include a charge controller to control the charging and discharging of the battery and a countdown timer which displays the amount of time left before the battery discharges fully.[5][6] Solar traffic light as an auxiliary systemAuxiliary solar traffic lights, in addition to the existing street lights, can be attached near the primary street lights. They are useful in regulating traffic when the primary system fails. The control system in the auxiliary traffic light monitors the primary system and when the primary system fails, it switches to the auxiliary system. Switching from primary system to the auxiliary system and vice versa can also be achieved using a hand-held transmitter unit.[7] Solar traffic light during natural disastersSolar traffic lights can also be used during periods following natural disasters, when the existing street lights may not function due to power outages and the traffic is uncontrollable. Street lights used in such scenarios are designed to be portable enough to be carried and operated by police and relief workers wherever traffic needs to be regulated.[8] Advantages
DisadvantageRisk of theft is higher as equipment costs are comparatively higher. [2]Snow or dust, combined with moisture can accumulate on horizontal PV-panels and reduce or even stop energy production. (3)Rechargeable batteries will need to be replaced several times over the lifetime of the fixtures adding to the total lifetime cost of the light. The charge and discharge cycles of the battery are important considering the overall cost of the project. References{{Portal|Renewable energy|Energy}}1. ^{{cite web|url=http://globalecopower.org/index.php?option=com_content&view=article&id=3&Itemid=5|title=Solar Traffic Lights|publisher=globalecopower.org|accessdate=2011-08-03|work=weblisting}} 2. ^{{cite web|url=http://www.consumersearch.com/light-bulbs/led-light-bulbs|title=LED light bulbs-LED has advantages but also drawbacks|publisher=consumersearch.com|accessdate=2011-08-03|work=}} 3. ^{{cite web|url=http://www.need.org/needpdf/Photovoltaics%20Student%20Guide.pdf|title=Photovoltaics-Student Guide|publisher=need.org|accessdate=2011-08-03|work=}} 4. ^{{cite journal|last=Diba|first=Keyvan T|location=Los Angeles, California, United States |date=22 July 2010 |title=ELECTRONIC TRAFFIC SIGNAGE|journal=Patent application number: 20100182164|pages=1|publisher=faqs.org|url=http://www.faqs.org/patents/app/20100182164|accessdate=2011-08-03}} 5. ^{{cite web|url=http://www.photonlaboratory.org/news/news_02-05_ap_delphi_traffic_light.htm|title=Police in New Delhi give thumbs up to BEL PV-powered traffic signal|publisher=photonlaboratory.org|accessdate=2011-08-03|work=}} 6. ^{{cite web| url= https://www.envisionledlighting.com/led-arl-15w-30k-bz-kn.php| title= LED Area Lights}} Friday, 20 July 2018 7. ^{{cite journal|last=Diba|first=Keyvan|location=Los Angeles, California, United States |date=23 October 2008 |title=Emergency traffic light system|journal=Patent application number: 20100182164|pages=1|publisher=faqs.org|url=http://www.faqs.org/patents/app/20080258933|accessdate=2011-08-03}} 8. ^{{cite web|url=http://nciia.org/conf08/assets/MMM_07_book.pdf|title=March Madness for the Mind-E-Team Exhibition|publisher=nciia.org|accessdate=2011-08-03|work=}} 9. ^1 2 {{cite journal|last1=Venkatachalam|first1=A.R.|last2=Gittell|first2=Ross|location=England |date=29 April 2011 |title=Launching the Next Industrial Revolution in New England: New Hampshire’s Green Launching Pad 1.0 and 2.0|journal=The New England Journal of Higher Education|pages=1|publisher=New England Board of Higher Education|url=http://www.nebhe.org/thejournal/launching-the-next-industrial-revolution-in-new-england-new-hampshire%E2%80%99s-green-launching-pad-1-0-and-2-0/|accessdate=2011-08-03}} 2 : Applications of photovoltaics|Traffic signals |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。