According to incomplete statistics, the total number of street lighting lamps in Nanjing has reached 180,000 baht, most of which are high-pressure sodium lamps. The energy consumed by these lamps is amazing. If you use a new type of LED luminaire, you can save about 50% of energy. Efficient and energy-saving LED lights, the city has only one road pilot installation, which is the reason? City street lamp energy saving, the sleeping market, who should "awake"? Recently, the author conducted an investigation.
180,000 ç› urban lighting street lights consume amazing energy
Street lights are one of the necessary facilities for the city. According to the incomplete statistics of relevant departments, during the "Eleventh Five-Year Plan" period, the city's street lamp construction has invested more than 700 million yuan, more than 30,000 new lights, and the total number of road lighting has reached 180,000. Among them, about 100,000 baht is managed by the urban management department, and the unit has self-built and landscape lighting with about 80,000 baht.
According to relevant persons from the Nanjing Street Lamp Management Office, the 100,000-inch lighting street lamps that are uniformly managed by the municipal government are mostly 250-watt high-pressure sodium lamps. It is open for 12 hours a day in winter and 8 hours a day in the summer, with an average of 10 hours a day.
Due to the large number, the street lamps consume a lot of energy. With 250 watts per street lamp and 10 hours per day, 180,000 street lamps consume 450,000 kWh of electricity per day and consume 160 million kWh per year. For example, according to the calculation of 0.5 yuan per kilowatt hour, the annual electricity cost for lighting street lamps is about 80 million yuan.
If you replace the high-pressure sodium lamp with a more energy-saving LED, what is the energy saving situation? I understand that if LED lamps are used, 120-watt LED lamps can replace 250-watt high-pressure sodium lamps, and the illumination brightness is equivalent. In other words, if LED lamps are used, only street lamps can save 80 million kWh per year and save electricity costs by more than 40 million yuan.
Liberation Road to launch a new pilot installation of LED lamps
With the rapid development of the domestic LED industry, energy-saving, environmentally-friendly, and green LED lamps have gradually become familiar to consumers in recent years, and have quickly entered various commercial and civilian fields. In order to test whether this kind of luminaire is suitable for urban lighting, the city also installed some LED luminaires in Jiefang Road last year. What is the actual use effect?
"About 400 ç› LED lamps were installed on Jiefang Road, but the experiment found that the existing LED lamps are not suitable for urban lighting." The person in charge of the city street lamp management office said that in the first month of installation, the maintenance personnel will Five or six LED lamps were found to be damaged. In the following year, the repair rate of these LED lamps was about 20%, which was much higher than the 1% repair rate of high-pressure sodium lamps. The high repair rate of LED luminaires results in high maintenance costs.
Secondly, the high price of LED city lighting is also unbearable. According to the source, at present, 6-watt residential LED lamps cost about 100 yuan each, and 120-watt urban lighting lamps are priced at more than 5,000 yuan. Although they have now dropped to more than 4,000 yuan each, they are still more than 1,000 yuan each. The price of high pressure sodium lamps is many times higher.
"Compared with high-pressure sodium lamps, LED lamps are power-saving and not cost-effective. The pilot installation test can be said to be a failure," the source said.
Sleeping energy-saving market needs to wake up
The author has learned that in some cities in the field, LED lamps have also been used as high-efficiency energy-saving representatives in large-scale promotion and use in urban lighting street lamps, but the results obtained are not satisfactory.
"High performance is high in installation cost and high cost of repair." According to experts in the city, the survey shows that urban lighting requires high-power and stable mature lamps, and LED lamps are still immature due to some technologies. It will present a more serious phenomenon of "light decay". After a period of use, the brightness of the light will become darker and darker.
In addition, in the long-term use of LED lamps, the heat dissipation function is not as stable as the high-pressure sodium lamp, resulting in damage to the lamps. "At least for now, LED lamps are more suitable for personalized landscape lighting and civil lighting. For the time being, they are not suitable for large-scale use in the field of lighting street lamps."
China's street lamp power has always been a major city power consumer, lighting street lighting energy is also known as the sleeping market, then, who should wake up this sleeping market?
In this regard, Nanjing experts said that from the current development of the LED industry, its production costs are greatly reduced each year, and the production process is also rapidly progressing. Taking cost as an example, the cost of LED lamps is decreasing at a rate of 20% to 30% per year. "With the rapid development of production technology and technology, LED lamps will be more and more perfect, the price will be lower and lower, and it is expected to gradually replace high-pressure sodium lamps," the source said.
Concerned about surprises
Tag: Urban Lighting City Street Lights Street Light Management Office High Pressure Sodium Lamps Illuminated Street Lights
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