Promote solar LED street lights should be moderately adapted to local conditions

In the 15th issue of "Ten Cities and Wanshao Reference", he published several articles on solar LED street lamps, such as the application of solar LED lamps, and has different understandings and opinions on the cases and opinions in the article. Now I will discuss with you.

The article lists some examples of the application of solar LED street lamps. The first one is that in November 2010, the length of Yingbin Avenue in Dazu County, Chongqing is 4.3 kilometers, with an investment of more than 17 million, a 20-year operation period and an annual energy saving of 870,000 kilowatts. At the time, 300 automatic tracking type flat-panel solar LED street lights were turned on. From the description of the above examples, it can be analyzed that the main road should be 6 lanes or more, the street lamps are installed on both sides, the spacing is 30 meters, the lamp height is about 10 meters, and the cost of each set of lamps exceeds 56,000 yuan. The above data can be analyzed that if a high-pressure sodium lamp is used instead of a solar LED street lamp, a sodium lamp with a power of 600 watts should be installed (870,000 kWh/(4150*300*1.1 (ballast loss)*1.05 (line loss)=0.605 kW). ), then analyze it, simply calculate the account, if all the construction costs according to the sodium lamp, the construction cost of 4.5 million yuan (300 sets of lights, the light source can only be calculated according to 400 sodium lamp, otherwise it will violate the design standards, each set of lights 1.5 10,000 yuan, including civil engineering, materials, machinery, installation and distribution, distribution, no low voltage nearby, with corresponding transformers), annual operation and maintenance costs of street lamps 300 * 200 = 60,000 (200 yuan per set of lights, in Jiangsu is already High level of electricity), annual electricity bill 300*4150*1.1*1.05*0.4*0.53=30.485 million yuan, available for operation and maintenance (1700-450) / (6 + 30.485) = 34.26 years (even according to the cost of agricultural electricity per degree Electricity 0.66 yuan calculation, also 28 years), far more than 20 years of planned operation Period (in fact, the maintenance fee can be basically neglected after 2-3 years before completion), and the operation and maintenance costs such as replacing LEDs, replacing batteries, controllers, and patrol inspections are not counted in these 20 years (solar LEDs are not Maintenance-free, it is necessary to have a large maintenance cost, the article will be specifically mentioned later. Moreover, if the previous investment of about 12.5 million funds is calculated according to compound interest, the cost will be higher, and it is extremely uneconomical. In addition, from the perspective of Yingbin Avenue in this case, it should be the main road or expressway. From the current construction status of each city, it should be 6 lanes or more. If the installation height is insufficient, it should be adjusted to 12 meters. The number of street lamps used on roads with a spacing of 35 to 40 meters and 4.3 kilometers will be reduced by 20% to 30%, the construction cost, electricity and maintenance costs will be less, and the cost performance will be higher. Conclusion 1: The construction site is Chongqing, according to China's solar sunshine area, the whole Sichuan is a sunshine-ridden area with annual sunshine hours less than 1600H, it is extremely unsuitable to install solar street lights (although this may also be the use of automatic tracking flat sun Reasons); 2 Conclusion: The installation of this road here solar LED lights price is too low, necessary if the count operation and maintenance costs, the cost of the installation angle of no.

In several articles published in the 15th issue of "Ten Cities and Ten Thousand References", the national street lights all use solar LED street lights to save a bright future of the Three Gorges Dam, listing the clean and pollution-free solar power street lights and saving electricity. The advantages of saving money, maintenance-free, etc., also enumerated the shortcomings of the short life of high sodium. I don’t dare to agree on the above points. I will talk about my own views on the above points:

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