Recently, GGII is expected by the end of 2020, China's urban rail transit planning total mileage will be more than 6000 km (excluding trams and urban rail), after deducting the already opened operating lines, the average annual operating mileage of 900 km up and down, the country opened operations Urban rail transit city will reach 40 or so, the amount of investment in rail transport will reach 3-4 trillion yuan.
With the development of the times, the needs of the community, the cause of subway construction flourishing. At the same time, the subway operation energy consumption, especially the lighting consumption has become particularly important, lighting problems on the construction of safe and harmonious traffic environment caused serious problems, so how to solve the subway lighting problem is the subject of today's society to explore the subject one.
Subway energy saving lighting：
At present, the subway lighting can be used lamps with high pressure sodium lamps, fluorescent lamps, high frequency electrodeless lamps, LED lights and so on. One of the high pressure sodium lamp and fluorescent lamp using gas discharge, storage lighting. The electrodeless lamp based on gas discharge and high frequency electromagnetic induction combination, the lighting is more avant-garde and the effect is better. LED for the semiconductor light-emitting diode based on the injection of light, long luminous aging, high intensity of illumination, far range, is more modern and advanced lighting technology.
High-pressure sodium lamp is the main lighting of China's current subway lighting materials, but the new LED lights with high efficiency and energy saving, long life, easy maintenance, stable working voltage, sit tight temperature, green and other characteristics, is the strong competition of subway lighting product. With the white LED in the technology and standards mature and rapid development, LED lighting appliances become the main source of light products on the market flow products.
LED energy saving lighting integration technology：
Subway lighting energy-saving technology should reflect the integration and principle, focusing on "environmental energy saving, mode of energy conservation, energy conservation control" three links to achieve.
One in accordance with the subway driving the required brightness, the external environment to detect, to ensure the basis of driving energy efficiency goals. One is to master the external environment, first of all to determine the brightness of the night at night, do a good night to enhance the photometric measures: review the completion of the rainy season after the outside world to detect the brightness, and has a targeted lighting design and implementation of the design before the amendment, Effectively control the environmental factors of lighting energy saving. Strengthen the subway energy saving and environmental protection needs of the specific environment of the outside world to conduct detailed and detailed testing, requiring the combination of subway driving needs at the same time, to energy conservation and environmental protection as the standard, the period of the external environment to detect and test the brightness of the subway Need to brightness value, so as to reduce the energy consumption in the subway construction process, to achieve the purpose of energy conservation.
The second to establish a control system to achieve high-end energy saving. According to the influence of the brightness of the subway, the traffic volume of the railway and the speed of the traffic on the brightness of the outside world, the external lighting control system is composed of the non-polar control with the outside brightness as the standard and the classification control with the metro traffic volume and driving speed as the standard.
The three in accordance with the control system and LED lighting technology on the combination of breakthrough results achieved by the subway driving the required brightness as the standard non-polar control low voltage signal can be achieved. The maximum and minimum power of today's lamps have been optimized. After that, the system control voltage decreases or decreases as the external brightness increases or decreases, and the lighting and lighting requirements of the subway are required to increase or decrease the brightness until the night lighting mode is converted.
LED lighting in the subway to put the feasibility:
1, LED has practicality
So that LED lighting in the appropriate environment to meet the lighting needs, especially the subway traffic requirements of high places should pay more attention. Among them, LED luminous efficiency has played a key role. One of the LED technology in recent years, the rapid development of commercial products luminous efficiency continues to improve, the basic breakthrough in high-power, high lighting, small volume of practical technical bottlenecks. The second LED lighting with white LED light source, color rendering index is very high. In practice, it is possible to hit the light source with a low color rendering index, that is, the equivalent brightness.
2, LED with reliability:
LED lamps in the subway lighting is still in the experimental stage, the market is not a unified qualitative products, in the type, organization, structure, standards on the ability is not easy. Research and practice of the results that, for the technical characteristics of LED, subway LED lighting quality and structure of the control requirements is very necessary.
First, the quality of the LED module is very reliable, but also has its instability. In the normal working environment, LED suddenly failed, or a short period of time the light failure that the lack of quality control of supply. Therefore, the control of supply to ensure quality, the need to develop standards and extensive implementation of testing.
Second, the reliability of LED lighting circuit. LED module combination of series, parallel, and series and parallel three. Requires cross-flow power supply in series with open-circuit technology to ensure the safety and reliability of LED lamps and lanes.
Third, the effectiveness of LED lighting cooling. LED lights have a good cooling function for continuous and stable work to provide lighting. So to prevent the LED work in the light failure, control LED life light bolt in the LED attention to optimize the structure, strengthen the heat, keep low temperature.
Fourth, LED lighting life of the coordination. LED lamp life of the length, by the light failure, light fixtures, circuit boards, reflectors and other components of the impact, therefore, to achieve modular lighting structure, light source power supply is to ensure the basis of LED lamp life.
3, LED in the subway in the economic energy:
For the LED lighting appliances economy. LED in the subway in the existence of the advantages of analysis.
There are several aspects:
First, LED lamps and higher prices, an increase of system construction costs, but LED lamps lower energy consumption, reducing the size of the system, reducing construction costs, not only conducive to the reduction of economic investment, but also conducive to the subway energy conservation work.
Second, LED lamps in the functional loss and life advantage, greatly reducing the operating costs during the operation and maintenance costs. And the implementation of the system after the annual savings in electricity costs than the first phase of 3.3 million yuan is very cost-effective investment. The same period in terms of economic value, but also reduce consumption, to ensure energy conservation work.
Third, the luminous efficiency of the LED module is constantly improving, the construction cost will be more conducive to the direction of the LED system tilt.
Fourth, reasonable value and fine design is the LED lighting system reflects the advantages of energy-saving and economic value of the key. High pressure sodium lamp in the lighting system is also an ideal platform for energy-saving integration technology. In the environment, mode and control and other energy-saving environment, LED lighting system in the luminous efficiency, color rendering index, life and other advantages of the gradual accumulation of travel system advantages. Mitally unstable factors can not grasp, often get the wrong information. Operating LED lighting work not only saves the economy, but also has a positive impact on the sustainable development of resources.
Subway LED lighting technology standards:
LED technology is in rapid development, but the LED module and LED tunnel lighting quality standards vary, to promote the use of LED technology caused by many confusion. Unified work to improve the relevant standards to ensure the healthy development of the technology is ongoing.
Ministry of Communications, "Metro Ventilation Lighting Design Code" LED lighting technology has not yet developed specific standards and regulations, the use of LED lighting technology to high pressure sodium lamp as a reference to limit its characteristics to play, so the amendment to improve the corresponding norms to promote the rational use of the work In progress. 3, LED in the subway in the economic energy
For the LED lighting appliances economy. LED in the subway in the existence of the advantages of analysis. There are several aspects:
First, LED lamps and higher prices, an increase of system construction costs, but LED lamps lower energy consumption, reducing the size of the system, reducing construction costs, not only conducive to the reduction of economic investment, but also conducive to the subway energy conservation work.
Second, LED lamps in the functional loss and life advantage, greatly reducing the operating costs during the operation and maintenance costs. And the implementation of the system after the annual savings in electricity costs than the first phase of 3.3 million yuan is very cost-effective investment. The same period in terms of economic value, but also reduce consumption, to ensure energy conservation work.
Third, the luminous efficiency of the LED module is constantly improving, the construction cost will be more conducive to the direction of the LED system tilt.
Fourth, reasonable value and fine design is the LED lighting system reflects the advantages of energy-saving and economic value of the key. High pressure sodium lamp in the lighting system is also an ideal platform for energy-saving integration technology. In the environment, mode and control and other energy-saving environment, LED lighting system in the luminous efficiency, color rendering index, life and other advantages of the gradual accumulation of travel system advantages. Mitally unstable factors can not grasp, often get the wrong information. Operating LED lighting work not only saves the economy, but also has a positive impact on the sustainable development of resources.
Subway LED lighting technology standards:
LED technology is in rapid development, but the LED module and LED tunnel lighting quality standards vary, to promote the use of LED technology caused by many confusion. Unified work to improve the relevant standards to ensure the healthy development of the technology is ongoing.
Ministry of Communications, "Metro Ventilation Lighting Design Code" LED lighting technology has not yet developed specific standards and regulations, the use of LED lighting technology to high pressure sodium lamp as a reference to limit its characteristics to play, so the amendment to improve the corresponding norms to promote the rational use of the work In progress.
To sum up:
Many countries on the LED technology development and application are valued. The United States in 2000 to develop the "next-generation lighting plan" was included in the energy bill, the EU in 2000 launched a special LED applications to promote the "Rainbow Project." China in 2003 by the Ministry of Science and Technology organized the formation of the "National Semiconductor Lighting Project Coordination Leading Group", many provinces have been the traffic industry began to study this aspect. Based on the existing research results and practical experience, through further research and solve the problems in LED lighting technology, to promote the Beijing Metro station LED lighting technology investment, the first to achieve the subway lighting technology energy-saving test work, and achieved good results And satisfaction. In the subway LED lighting energy-saving technology applications have research and development of the mention, but there are still many problems, we need to explore the perfect. LED lighting promotion and development will save us valuable resources to protect the living environment.
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