Urban lighting is an important part of urban infrastructure. It not only plays an active role in lighting the city and beautifying the environment, but also provides a strong guarantee for traffic safety and social security. At the same time, it is improving the city's grade, improving the city's image and improving the urban environment. It has an extremely important role, but urban lighting also imposes a heavy burden on financial expenses.
In recent years, China's urban road lighting has developed rapidly. In 1999, 3 million street lamps were installed nationwide. At present, it has reached about 100 million baht, the installation power has reached 250 million kilowatts, and the annual electricity consumption is about 59 billion kWh. This figure is relatively large and has considerable potential for energy savings. Take the existing street lights in Hebi New District as an example. In 2009, the street lamp system electricity fee reached 4 million yuan. In the face of the energy and environmental crisis, all countries are striving to implement the “energy-saving and emission-reduction†project, and the conservation of urban lighting power has become a link that cannot be ignored in energy-saving work. From the reality of street lighting, how to save energy scientifically has become an important issue in the street lamp industry. The author takes some understanding of the actual road lighting energy-saving work, and should adopt energy saving from the following aspects.
1 Reasonable lighting selection and arrangement
According to the industry standard CJJ45-2006 "Urban Road Lighting Design Standards" of the Ministry of Construction and our practical experience and actual conditions, we strictly select the layout mode of street lamps, the spacing and height of street lamps, etc., in accordance with the requirements of design standards, and require reasonable choice of illumination. Standard and power density values, determine the appropriate light source to achieve reasonable illumination, avoid or reduce the blindness of street lamp design, and thus achieve energy saving of street lamps.
2 regulated buck dimming energy saving
In road lighting projects, the illuminance is affected by the grid voltage, while the grid voltage is affected by the load. At the peak load, the voltage is low, and the voltage is high when the load is low. In the evening, the road traffic volume peaks. At this time, the grid voltage is low, the light source flux is low, and the road illumination is low. Near midnight, the road traffic volume is low. At this time, the grid load is low, and the grid voltage is high, and the light flux emitted by the light source is high. The road surface illumination is high. This unreasonable phenomenon causes the phenomenon of affecting traffic safety and seriously wasting energy and capital. The intelligent light source voltage-stabilizing step-down dimming device is installed at the control end of the street lamp. When the voltage fluctuation is large, the flow of people is small. In the middle of the night, the device is used to reduce the voltage and achieve energy saving under suitable illumination conditions.
3 midnight light mode
The midnight light energy-saving mode is the earliest and most effective energy-saving mode. The mid-night light refers to the street light in the street with high illumination or the urban-rural junction. Because the traffic flow and traffic volume are less in the middle of the night, the brightness does not need to be too high. After 23:00, some lights are extinguished to save energy. The characteristics are: small investment, quick effect, obvious effect, simple and easy method, easy maintenance, power saving rate of more than 20%; its largest The disadvantage is that the illumination is not uniform. If the midnight light is used better with the street light wireless monitoring system, the midnight light will be easily turned off.
4 Select energy efficient lighting system
4.1 Light source: 1 Replace the incandescent lamp with the low-power high-pressure mercury lamp with a compact fluorescent lamp (energy-saving lamp). The luminous flux of an 18W energy-saving lamp is equivalent to a 100W incandescent lamp, and the energy-saving effect is remarkable; 2 with high-efficiency high-pressure sodium lamp Replace the high-pressure mercury lamp with the ordinary high-pressure sodium lamp with a metal halide lamp. For example, a high-pressure mercury lamp with a power of 400W, a high-pressure sodium lamp, and a high-efficiency high-pressure sodium lamp (Philips series) have luminous fluxes of 22000LM, 48000LM, and 54000LM, respectively, which are increased by 118%. 13%, energy saving effect is obvious; 3 LED lights replace traditional neon lights, which are characterized by high brightness; can achieve a variety of color and pattern changes through the controller; low power consumption, long life, the same area LED light power is only 10%-20% of neon lights, life expectancy is 5-10 times of neon lights; maintenance is convenient and simple.
In recent years, China's urban road lighting has developed rapidly. In 1999, 3 million street lamps were installed nationwide. At present, it has reached about 100 million baht, the installation power has reached 250 million kilowatts, and the annual electricity consumption is about 59 billion kWh. This figure is relatively large and has considerable potential for energy savings. Take the existing street lights in Hebi New District as an example. In 2009, the street lamp system electricity fee reached 4 million yuan. In the face of the energy and environmental crisis, all countries are striving to implement the “energy-saving and emission-reduction†project, and the conservation of urban lighting power has become a link that cannot be ignored in energy-saving work. From the reality of street lighting, how to save energy scientifically has become an important issue in the street lamp industry. The author takes some understanding of the actual road lighting energy-saving work, and should adopt energy saving from the following aspects.
1 Reasonable lighting selection and arrangement
According to the industry standard CJJ45-2006 "Urban Road Lighting Design Standards" of the Ministry of Construction and our practical experience and actual conditions, we strictly select the layout mode of street lamps, the spacing and height of street lamps, etc., in accordance with the requirements of design standards, and require reasonable choice of illumination. Standard and power density values, determine the appropriate light source to achieve reasonable illumination, avoid or reduce the blindness of street lamp design, and thus achieve energy saving of street lamps.
2 regulated buck dimming energy saving
In road lighting projects, the illuminance is affected by the grid voltage, while the grid voltage is affected by the load. At the peak load, the voltage is low, and the voltage is high when the load is low. In the evening, the road traffic volume peaks. At this time, the grid voltage is low, the light source flux is low, and the road illumination is low. Near midnight, the road traffic volume is low. At this time, the grid load is low, and the grid voltage is high, and the light flux emitted by the light source is high. The road surface illumination is high. This unreasonable phenomenon causes the phenomenon of affecting traffic safety and seriously wasting energy and capital. The intelligent light source voltage-stabilizing step-down dimming device is installed at the control end of the street lamp. When the voltage fluctuation is large, the flow of people is small. In the middle of the night, the device is used to reduce the voltage and achieve energy saving under suitable illumination conditions.
3 midnight light mode
The midnight light energy-saving mode is the earliest and most effective energy-saving mode. The mid-night light refers to the street light in the street with high illumination or the urban-rural junction. Because the traffic flow and traffic volume are less in the middle of the night, the brightness does not need to be too high. After 23:00, some lights are extinguished to save energy. The characteristics are: small investment, quick effect, obvious effect, simple and easy method, easy maintenance, power saving rate of more than 20%; its largest The disadvantage is that the illumination is not uniform. If the midnight light is used better with the street light wireless monitoring system, the midnight light will be easily turned off.
4 Select energy efficient lighting system
4.1 Light source: 1 Replace the incandescent lamp with the low-power high-pressure mercury lamp with a compact fluorescent lamp (energy-saving lamp). The luminous flux of an 18W energy-saving lamp is equivalent to a 100W incandescent lamp, and the energy-saving effect is remarkable; 2 with high-efficiency high-pressure sodium lamp Replace the high-pressure mercury lamp with the ordinary high-pressure sodium lamp with a metal halide lamp. For example, a high-pressure mercury lamp with a power of 400W, a high-pressure sodium lamp, and a high-efficiency high-pressure sodium lamp (Philips series) have luminous fluxes of 22000LM, 48000LM, and 54000LM, respectively, which are increased by 118%. 13%, energy saving effect is obvious; 3 LED lights replace traditional neon lights, which are characterized by high brightness; can achieve a variety of color and pattern changes through the controller; low power consumption, long life, the same area LED light power is only 10%-20% of neon lights, life expectancy is 5-10 times of neon lights; maintenance is convenient and simple.