Zhejiang promotes LED street lamp green lighting energy-saving renovation
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At the same time as the pace of urbanization is accelerating, the construction of lighting facilities in the public sector in Jiaxing City is also increasing. The street lamps illuminate the way the citizens go home. However, the electricity expenditure and operation and maintenance costs of nearly 145,000 street lamps have become a heavy burden for the city, county government and local street lighting operation and maintenance units. At present, Jiaxing City has carried out the promotion and application of LED street lamps in various counties (cities). Can the improvement of the running cost of street lamps be too high after the transformation? Does LED street light have an advantage in terms of service life and cost compared to existing street lamps? From the on-site meeting of the provincial road green lighting renovation project held in Tongxiang on the 17th, you can find out.
Street lamp electricity expenses are much higher than income. With the rapid development of the city, the roads in various towns and towns have increased the construction of street lamps, and the road sections with lower illumination have been reconstructed. Taking Tongxiang as an example, the city's streetlights increased from 29,000 baht in 2008 to 42,000 baht in 2013. At present, street lamp electricity expenses have accounted for about 50% of the city's total street lamp surcharge, even though the street lamp surcharge income is also annual. Increasingly, the street lamp electricity bill has increased from 8.09 million yuan in 2008 to 13.28 million yuan in 2013, and the expenditure is much higher than income.
It is urgent to carry out energy-saving renovation of street lamps and reduce the expenses for street lamps electricity and maintenance. To this end, Jiaxing Municipal Government and State Grid Jiaxing Power Supply Company have continuously implemented the practice of street lamp energy-saving renovation. In April 2012, the first streetlight LED retrofit project undertaken by Zhedian Energy Saving Service Co., Ltd. settled in Haining. Through the streetlight renovation of Qianjiang Road and Wenzong Road in Haining, the annual energy saving was 860,000 kwh, equivalent to 269 tons of standard coal. In 2013, the promotion and application of LED street lights for many important roads such as Tongxiang Tongxing Road, Pinghu City Pinghu Avenue, Binhai East-West Avenue, Haiyan Baiji Road and Jiashan County Development Zone were successively completed. The scope of transformation and application covered all counties (cities, cities, Area). At present, there is no road section at the city level.
By the end of 2013, Jiaxing City had signed a contract to renovate 16878 baht lamps, and actually completed the renovation of street lamps by 10,845 baht. The annual energy saving was 7.96 million kwh. At present, the province's road energy-saving renovation is the most in Jiaxing, among which the road green energy-saving renovation, Tongxiang has the most effect and obvious effect. .
Calculating the cost of two street lamps, from the perspective of service life and operating costs, how big is the difference between LED street lights and existing street lights? The service life of ordinary high-pressure sodium lamps is generally about 3 years. According to the current operation situation, it usually needs to be replaced in 2 years. The cost of repairing materials is about 400 yuan per ton, including the cost of ballasts and sodium lamps. The cost of labor and machinery is calculated according to 20 of the material cost, which means that the cost of replacing a lamp is about 480 yuan.
The service life of LED street lamps can be 6 to 7 years according to the existing design, and the supplier has a 3 to 5 year warranty. Judging from the current operation of LED street lights in our city, the repair rate is very low, and there is basically no maintenance and replacement due to product quality problems. The average cost of a lamp is about 1,500 yuan.
Take a section of the road that is currently being rebuilt in our city as an example. There are 412 è·¯ street lamps. The ordinary high-pressure sodium lamps are replaced every two years. The cost of 197,700 yuan is required, and the cost is 59.3 million yuan for 6 years. And if all the ordinary high-pressure sodium lamps are replaced with LED lights within 6 years, the total cost is about 618,000 yuan.
According to the operation and operating cost calculation, although the current LED street light is not obvious from the operating cost and the ordinary high-pressure sodium lamp, it reduces the workload of the operating personnel in the maintenance, and ensures the lighting rate of the road street lamp, and the future replacement. The cost is also much lower. The relevant person in charge of the State Grid Jiaxing Power Supply Company said that LED street lights have obvious advantages in street lamp electricity charges, and most road lights can save more than 30 electricity bills.
How many electricity bills can be saved by saving a lot of electricity in one year? We selected Tongxiang, the most reconstructed one, to find out. At present, the street lamps of the city's main roads mainly use high-pressure sodium lamps and metal halide lamps. According to the road illumination measurement, 135W LED street lamp can be used instead of 250W high-pressure sodium lamp, and 75W LED street lamp can replace 150W, 110W high-pressure sodium lamp, and the power saving rate is about 50. However, since the original road light distribution of the current road does not meet the lighting requirements, some roads need to increase the single lamp power during the transformation.
If the city's street lamps are fully energy-saving retrofits, the street lamp electricity charges will be significantly reduced according to the average power saving rate of 30. The relevant person in charge of the State Grid Tongxiang Power Supply Company calculated an account and calculated the electricity cost of 13.8 million yuan in Tongxiang City in 2013, which can save about 4 million yuan in electricity costs.
Taking the transformation of Qingxiang Road, the main road of Tongxiang as an example, the original section is equipped with 156 250 of 250W and 150W high pressure sodium lamps, 100 watts of 400W high pressure sodium lamps, and the total power is 102.4kw. After the transformation, the total power consumption of this section is reduced by 54.64kw. The power saving rate has reached 53, and the street lamp works 11.5 hours per day. It can save 22,935,1.4kwh of electricity every year and save electricity by 217,000 yuan.