In 2004, the Ministry of Construction and the National Development and Reform Commission issued a notice on the “Regulations on Strengthening Urban Lighting Management to Promote Energy Conservation†on the basis of the “Regulations on the Management of Urban Road Lighting Facilitiesâ€. The article points out that “we vigorously promote energy-saving technologies and improve the efficiency of power utilization; strictly follow the lighting design standards and standardize the construction of lighting facilities, and must not exceed the standard construction; new lighting projects must adopt scientific lighting design methods to promote the use of high-efficiency lighting products and Energy-saving control technology." and other rules. With the rapid development of China's economic construction, the social urbanization construction has advanced by leaps and bounds. Therefore, the transformation of urban road lighting and new construction projects have also sharply increased. However, with the substantial increase in energy consumption, especially in recent years, energy prices have increased significantly, making electricity consumption a burden. Therefore, the energy saving of street lamps is bound to become a trend.
I. Urban road lighting engineering design and energy saving
The purpose of urban road lighting is to create a good viewing environment for drivers and pedestrians, to enable people to reach their destination safely, quickly and comfortably; and to reduce crimes against people and property. There are generally more pedestrians on the sidewalks of the city, so the main road lighting in the city should not only illuminate the road surface, but also illuminate the sidewalk properly, and make the semi-column illumination meet the standard requirements, which is conducive to the rapid discovery of people or animals. Crossing roads and other potential insecurities.
Design is the source of energy savings. Urban lighting engineering design should be carried out by professional designers. The design should strictly follow the nature and function of the road, and compare the corresponding illumination and energy density standards to determine the most energy-saving cloth spacing, light source, power supply route, control system and so on. This requires road lighting engineers not only have a good sense of professional responsibility, but also a comprehensive technical quality, can master the scientific lighting design methods. Designers in the road lighting design, in order to ensure the effect of lighting, to achieve the purpose of urban road lighting, to maximize energy and investment, and reduce operating and maintenance costs.
Second, take a reasonable cloth spacing
Whether the spacing of the street lamps is appropriate is directly related to the effect of lighting. Installation spacing is especially important for energy savings, with as much installation pitch as possible.
If the two sides are symmetrically arranged, when the distance is 30 meters, 66 lights per kilometer, such as 250w, for each light for 10 hours, the power consumption per kilometer is 66*250*0.001*365*10=60225kwh (excluding the ballast) Loss); If the distance is 40 meters, 50 lamps per kilometer, the power consumption is 50*250*0.001*365*10=45625kwh, saving 14600 kWh per kilometer, assuming 25,000 new urban roads per year Kilometer calculation can save 365 million KWh of electricity and save 2 billion yuan in lighting poles (5000 yuan per pole), which is quite impressive. Of course, this is calculated on the premise that the road intersection and the isolation zone segment are not considered to affect the spacing arrangement. As can be seen from the above, under the premise of meeting the standard, the spacing of the lighting is very significant for energy saving.
Third, the choice of street light source
At present, the main types of light sources used in street lighting are: metal halide lamps, high pressure sodium lamps, incandescent lamps, compact fluorescent lamps, and the like. Under the same electric power, the high-pressure sodium light energy is about 40% higher than that of the metal halide lamp, and the fog light performance of the sodium lamp is better; according to the road illumination requirement of the same illumination standard, the metal halide lamp light source consumes more power than the high-pressure sodium lamp. Therefore, high pressure sodium lamps are widely used in urban road lighting projects.
With the development of science, the technology of LED light source is mature, and LED light source is widely promoted and applied in many large and medium cities. LED light source is characterized by long life, high efficiency, energy saving, safety and environmental protection. According to experts, compared with high-pressure sodium lamps, the new high-power LED street lamps can save 80% of electric energy, and can basically replace the high-pressure sodium lamps commonly used in street lamps.
The power consumption of the LED light source is 18.7% of the high-pressure sodium lamp, which can save more than 80% of the electric energy.
High-pressure sodium lamp replacement costs and maintenance costs are 5 times that of LED street lights. It can be seen that LED street lights can not only save energy than high-pressure sodium lamps, but also save cost and maintenance costs. Therefore, the wide application of LED light source in urban road lighting is bound to be the trend of the times.
I. Urban road lighting engineering design and energy saving
The purpose of urban road lighting is to create a good viewing environment for drivers and pedestrians, to enable people to reach their destination safely, quickly and comfortably; and to reduce crimes against people and property. There are generally more pedestrians on the sidewalks of the city, so the main road lighting in the city should not only illuminate the road surface, but also illuminate the sidewalk properly, and make the semi-column illumination meet the standard requirements, which is conducive to the rapid discovery of people or animals. Crossing roads and other potential insecurities.
Design is the source of energy savings. Urban lighting engineering design should be carried out by professional designers. The design should strictly follow the nature and function of the road, and compare the corresponding illumination and energy density standards to determine the most energy-saving cloth spacing, light source, power supply route, control system and so on. This requires road lighting engineers not only have a good sense of professional responsibility, but also a comprehensive technical quality, can master the scientific lighting design methods. Designers in the road lighting design, in order to ensure the effect of lighting, to achieve the purpose of urban road lighting, to maximize energy and investment, and reduce operating and maintenance costs.
Second, take a reasonable cloth spacing
Whether the spacing of the street lamps is appropriate is directly related to the effect of lighting. Installation spacing is especially important for energy savings, with as much installation pitch as possible.
If the two sides are symmetrically arranged, when the distance is 30 meters, 66 lights per kilometer, such as 250w, for each light for 10 hours, the power consumption per kilometer is 66*250*0.001*365*10=60225kwh (excluding the ballast) Loss); If the distance is 40 meters, 50 lamps per kilometer, the power consumption is 50*250*0.001*365*10=45625kwh, saving 14600 kWh per kilometer, assuming 25,000 new urban roads per year Kilometer calculation can save 365 million KWh of electricity and save 2 billion yuan in lighting poles (5000 yuan per pole), which is quite impressive. Of course, this is calculated on the premise that the road intersection and the isolation zone segment are not considered to affect the spacing arrangement. As can be seen from the above, under the premise of meeting the standard, the spacing of the lighting is very significant for energy saving.
Third, the choice of street light source
At present, the main types of light sources used in street lighting are: metal halide lamps, high pressure sodium lamps, incandescent lamps, compact fluorescent lamps, and the like. Under the same electric power, the high-pressure sodium light energy is about 40% higher than that of the metal halide lamp, and the fog light performance of the sodium lamp is better; according to the road illumination requirement of the same illumination standard, the metal halide lamp light source consumes more power than the high-pressure sodium lamp. Therefore, high pressure sodium lamps are widely used in urban road lighting projects.
With the development of science, the technology of LED light source is mature, and LED light source is widely promoted and applied in many large and medium cities. LED light source is characterized by long life, high efficiency, energy saving, safety and environmental protection. According to experts, compared with high-pressure sodium lamps, the new high-power LED street lamps can save 80% of electric energy, and can basically replace the high-pressure sodium lamps commonly used in street lamps.
The power consumption of the LED light source is 18.7% of the high-pressure sodium lamp, which can save more than 80% of the electric energy.
High-pressure sodium lamp replacement costs and maintenance costs are 5 times that of LED street lights. It can be seen that LED street lights can not only save energy than high-pressure sodium lamps, but also save cost and maintenance costs. Therefore, the wide application of LED light source in urban road lighting is bound to be the trend of the times.