Energy-saving renovation plan for LED street lights
With the continuous consumption of energy and the increasing scarcity of resources, the greenhouse effect is becoming more and more harmful to human beings, and the atmospheric environment is becoming more and more serious to the earth. The international demand for energy saving and consumption reduction is increasing. Nowadays, energy saving has become a country in the world. The top priority of work. China officially launched the green lighting project as early as 1996, and proposed that the lighting project should save resources, prevent pollution, and benefit future generations. Over the years, through the joint efforts of all walks of life, as the fourth generation of light source semiconductor (LED) lighting products, there has been a leap in development, and remarkable achievements have been made in energy saving.
China's outdoor road lighting accounts for about 30% of the entire lighting electricity consumption, which is closely related to people's production and life. As an important application of outdoor lighting, LED street lights have their advantages:
1. High-power LED street lights have a long life
For this focus issue that everyone pays great attention to, as many domestic and foreign experts and company product brochures describe 50,000-100,000 hours, and are optimistic, in fact, the life of high-power LED street lights depends on the following points:
(1) The chip quality and light attenuation value of the LED light source.
(2) LED packaging quality. Consistency and reliability.
(3) LED is used as a cold light source, but the LED semiconductor itself generates heat. The heat dissipation of the LED ensures good working conditions of the LED.
(4) Lifetime quality assurance of power supply and constant current drive.
2. High energy saving efficiency
Lighting engineering is a systematic engineering. Both photopic lighting and atmosphere lighting are converted into light through electric energy, and then projected by lamps, so that a certain local illuminated surface can reach a certain degree of illuminance, uniformity, color rendering, and multiple illuminated surfaces. The partial synthesis of a complete lighting project cannot simply be compared with power consumption, but must be compared through comprehensive and comprehensive analysis.
3, the difference between conventional lamps and semiconductor LED lighting lamps
luminaire is a luminaire composed of light source, power supply, lampshade and other accessories. It is a lighting tool used to control the light source, light projection, and at the same time protect the light source and improve the lighting efficiency.
Conventional street lamp lighting fixtures are mainly composed of lamp housing, light source cavity, electrical room, etc. Because it has enough shell space and the sealed installation of activated carbon and foamed silicon rubber to dissipate heat, the working conditions of the light source are guaranteed. The protection level of the light source cavity is IP65, and the protection level of the electrical room is IP45. Conventional street lighting can be made into any shape as long as the protection conditions are guaranteed. China’s conventional street lighting is designed to be brilliant, which really shows the scene of viewing during the day and viewing the lights at night.
With the advent of semiconductor LED street lights, the uniqueness of the long life of the light source, the advantages of easy and reasonable light distribution, the variability of color temperature, and the advantages of high color rendering index, low voltage, current light source power supply has the development trend of high efficiency and energy saving .
has inherent advantages for LED application in street lamps, and its advantages are:
1. LED as a point light source, if the design is reasonable, it can directly solve the problem of secondary light extraction and light loss that traditional spherical light sources must rely on light emission to solve;
2. The uniformity of the light irradiation surface is controllable, and theoretically it can be completely uniform in the target area, which can also avoid the light waste in the phenomenon of "lighting under the lamp" in traditional light sources;
3. The color temperature is optional, so that it is also an important way to improve efficiency and reduce costs in applications in different occasions;
4. There is still a lot of room for technological progress.
4. Optical rational light distribution of LED street lights
LED is different from traditional lighting, it has the characteristics of point light source, high brightness, narrow beam output and so on. To make LED street lights, we must first consider making full use of the limited luminous flux to the effective illumination range. Street lights require road lighting effects, and the open space beyond the road is not the effective range of street lighting. Therefore, effectively controlling the distribution range of light and making the light emitted by the luminous tube become a long strip of light spreading along the road surface, while also taking into account the generation of glare, is a higher requirement for the designers of new LED lamps.
5. Comparison of the main technical performance indicators of current LED street lights:
6. Calculation of energy-saving indicators (calculated at 12 hours per day):
Save electricity every year=365*12*(0.5-0.16)=1489.2
annual electricity savings = 1489.2*0.8=1191.36 yuan
After the transformation of LED street lights, each lamp saves 1191.36 yuan in electricity bills per year. If the entire road surface adopts LED street lights, it will save a lot of electricity for the country every year, and in terms of economic benefits, it will save a lot of money.
