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Where does the urban lighting power saving start? I think we should first understand the importance of urban lighting functions correctly. The quality of lighting that meets the visual function is an indispensable condition for ensuring traffic safety, social security, people's production and cultural entertainment activities. This is the scientific conclusion drawn by human beings through long-term practice. Taking road lighting as an example, China's newly revised road lighting standards guide road lighting workers to make reasonable lighting designs to provide lighting conditions that meet the driver's visual requirements and ensure drivers. And pedestrian safety, improve night road utilization.
China's pre-existing power is not rich, especially when energy is scarce, lighting energy is often focused on reducing the power of the lamp, reducing the number of lights or shortening the time of lighting. Road lighting With the continuous advancement of technology and the needs of urban development, the level of road lighting management in Taizhou has leapt to a new level.
Therefore, it is clear that these so-called "energy-saving" methods can also be said to be insufficiently aware of the importance of urban lighting functions. Energy saving is negative in this way, and it is unfavorable. Still taking street lighting as an example: In May 1974, the US government announced that road lighting should be reduced to a minimum of 6.5 lux for national lighting, and in November 1974, street lighting was used on a kilometer-long road in Florida, USA. The relationship between the reduction of traffic accidents and the traffic accidents was tested. The results showed that traffic accidents in the night increased by 40%, equivalent to economic losses of 27,000 US dollars, while energy-saving instruments were 0.93 million US dollars. Accordingly, in June 1977, the US government cancelled the decision. Another example is the impact of the worldwide energy crisis that broke out in the 1973 Middle East War. The British government cut public lighting, including street lighting, by 50 percent from 1973 to 1974, during which nighttime lighting accidents increased by a percentage. Twelve, the economic loss is increased by £6 million. In the meantime, the energy saving value is 100,000 pounds. To this end, the British government announced in 1975 that for safety reasons, the energy required for lighting should be ensured.
It is not difficult to see from the above examples: It is not advisable to use the power-saving measures that impair the visual function in terms of social benefits or economic benefits. Therefore, we should have a full understanding of the importance of lighting functions. Lighting power saving is a comprehensive work involving more faces. Under the premise of maintaining the level of lighting that should be. It is completely feasible to realize energy conservation. According to the actual situation in China at present, combined with the practical experience of my work, I put forward the following suggestions on lighting energy saving:
First, reasonable determination of lighting standards
Energy saving in urban lighting is by no means achieved by lowering lighting standards. Energy conservation should be mentioned on the premise that roads at all levels meet the corresponding lighting standards. Therefore, whenever a road lighting factory does not count construction, we should allow the use of light energy to meet the lighting standards. First, determine the road lighting level, and design according to different lighting places such as main roads, secondary roads, and residential areas to maximize the use of light energy. Usually, several schemes are used for analysis and comparison, and a scheme that is both economical and energy-saving is selected. In terms of road lighting, it is generally more economical and energy-efficient to use a lighter with a higher installation height and spacing and a higher power source than a light source with a small installation height and spacing and low power.
Second, choose a light source with high luminous efficiency
On the basis of proper consideration of the color rendering of the light source, the use of high-efficiency light source is an important part of lighting energy saving. Incandescent lamps are often used as the first generation of light sources. Fluorescent lamps and high-pressure mercury lamps invented in the 1930s as second-generation light sources. In the mid-1960s, after the breakthrough of translucent alumina ceramics and its sealing process, high-pressure sodium lamps made it on the lighting stage, which is known as the third-generation light source: high-pressure sodium lamps are the most efficient in high-intensity discharge lamps. One can reach 120 lumens per watt, 2.2 times that of high-pressure mercury lamps and 8-10 times that of incandescent lamps. Moreover, the characteristics of the high-pressure sodium lamp are stable, and the lumen maintenance is the best. After 8,000 hours of ignition, the aperture can still be 80%-90% of the initial value, and the service life is over 10,000 hours, and its corrosion resistance and light transmission performance are combined. Strong and other advantages, high-pressure sodium lamps have become a widely used and energy-saving light source, and have received the attention of the energy sector and lighting designers. Recently, high-pressure sodium lamps have been widely used in road lighting, station terminals, railway ports and factory lighting, etc. Significant energy savings.
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