There are three top events in the world: the Olympics, the World Cup and the World Expo. The World Expo, which is known as the "Olympic" event of the world economy, science and technology, and culture, has consistently implemented the concept of "Science and Technology Expo, Low-carbon Expo".
Among the 5.28 square kilometers of the park area of ​​the Expo Park, there are 29 public roads under the jurisdiction of the Shanghai Street Light Management Center. LED and related technologies have played a significant role in promoting urban energy conservation and emission reduction, and are considered to be the new solid-state cold light source with the most energy-saving and environmentally-friendly characteristics, but failed to enter the ranks of the road lighting products of the 29 Expo sites.
Why does the Expo, which is based on "technology and low carbon", reject LED, a new type of solid-state cold light source that is energy-saving and environmentally friendly?
The trend of led street lights is PASS by the Expo Park
“In early 2008, the leaders of the Expo Bureau and the relevant professionals of the street lighting management department of the Shanghai Electric Power Company conducted many discussions on the design and construction of the streetlights in the Expo site. The leaders of the Expo Bureau have proposed the use of LED street lights for the streetlights of the Expo site. "Solar LED street light scheme." Wang Xiaoming, chief engineer of Shanghai Street Light Management Center, pointed out, "We conducted some investigations and technical analysis. We believe that the domestic LED streetlight technology was not mature at the time. The LED streetlights tried everywhere, the use of the scene is difficult. Satisfied, there is no LED street light product available for application. At that time, there were some problems with LED street lights."
The light effect is not high, the power supply (driver) fault is high, and the light decay is large, which is a common problem of LED street lamps at that time. In addition, the weight of the luminaire is too large, the structure is unreasonable, the color temperature is high, and the life is not long (not consistent with the number of 100,000, 50,000 hours). The enthusiasm of non-traditional street lamp manufacturers to promote LED street lamps is higher, and the lighting of lamps is reasonable. It is also the worry of the Shanghai Street Lamp Management Center.
"Solar energy utilization technology is also unsatisfactory, especially batteries, which have short life and frequent replacement. Because the power of street lamps is relatively large, the capacity of the required batteries is relatively large. The weather in Shanghai is quite special. To meet the long-term lighting needs of street lamps. In recent years, the analysis of solar streetlights in some areas of Shanghai, such as Chongming, Songjiang and other places, did not meet the basic requirements."
After the above analysis, in 2008, the Shanghai Electric Power Company basically reached an opinion: the Expo Park should not promote the use of LED street lights; the solar street lights are technically unable to meet the basic street lighting requirements.
Shanghai LED street light trial situation
In order to better understand and master the LED street lamp technology, since July 2008, after some investigations and comparisons, Shanghai has tried a batch of LED street lamps: Wuning Road 135W/80W/313ç›; Yuanshen Road (Yushan Road) ) 135W/300ç›; Mall Road 120W/15ç›; Guoke Road 64W/22ç› and other sections, the trial period is longer than 18 months.
Shanghai has adopted domestically produced LED lighting fixtures for the first time in the 8.9-kilometer Yangtze River Tunnel Bridge tunnel, using more than 5,800 LED tunnel lights per 92 watts; LEDs are used in the main bridge section of the Huangpu River. Road lights, using 164 ç› LED street lights per 160 watts. The application of LED lighting fixtures on these tunnels and bridges has effectively promoted the development of LED street lighting technology in Shanghai.
LED technology is the direction of urban road lighting
Energy conservation and emission reduction is a big policy of the country. Road lighting can indeed do a lot of work in this respect. Although Shanghai now uses 96% of road lighting as a source of light, LED technology is an invaluable technology prospect as road lighting.
"LED technology as a city road lighting should be the direction we have to work hard." Wang Xiaoming said. “The technical performance is stable, the quality is safe and reliable, the maintenance is simple and fast, the appearance is beautiful and practical, the materials are selected, and the energy conservation and environmental protection in the production process are the principles we follow.â€
In recent years, LED lighting technology has developed rapidly under the encouragement of relevant national policies throughout the country. “Brother cities are ahead of the application of LED road lighting, and road lighting applications in Shanghai are also catching up. This year, it is planned to conduct relevant field test application analysis of LED streetlights in some sections to provide applications for LED road lighting. Effective technical support." LED has gradually become the hottest and most eye-catching light source in the world. It is being watched at an immeasurable speed and is growing rapidly.
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