First, the basic conditions and needs of road lighting <br> The purpose of road lighting is to provide drivers (including motor vehicles and non-motor vehicles) and pedestrians with good visual conditions, in order to improve traffic efficiency, reduce night traffic accidents; help the road The user can see the surrounding environment and identify the position; illuminate the environment and deter crime. At the same time, good road lighting can also play a role in enriching life, prospering the economy, and enhancing the image of the city.
A good road lighting system must meet the following lighting requirements:
1. The average brightness should not be lower than 1 cd/m2, the total uniformity Uo = 0.4, and the axial uniformity U1 = 0.5;
2. If there are non-motor vehicle lanes or sidewalks on both sides of the main road, the average horizontal illumination should not be lower than 50% of the main road, and the recognition degree of non-motor vehicle pedestrians or objects must be guaranteed;
3. If there are buildings around the road, light should be prevented from directly entering the building;
4. Since the street lamp is installed in the air above 6 meters, replacing the street light source is a costly work, so the life and reliability of the light source can be highly demanded;
5. The number of light sources used in road lighting is large, and the power consumption is large. High-efficiency light sources must be used.
Therefore, in the use of road lighting systems, light source products with high luminous efficiency, long life and high lumen maintenance rate should be preferred. At present, from the road construction trend of China and the development trend of road lighting technology, a number of innovative and technological products, such as high-efficiency high-pressure sodium lamps, will provide strong support for China's road green lighting construction, upgrading the status of road lighting and replacing it. stand by.
Second, the basic technical characteristics of high-efficiency high-pressure sodium lamp <br> High-efficiency high-pressure sodium lamp has many advantages such as high luminous efficiency, low power consumption, long life, strong fog and no insects.
Take Philips' SON-T Plus product as an example. Its light efficiency can be as high as 140lm/W, which is 20% more than ordinary products, which can achieve better energy saving effect. At the same time, the average service life of up to 32,000 hours can reduce maintenance costs by about 30%.
Using Philips' unique PIA-integrated antenna-type liner structure, the Philips high-efficiency sodium lamp SON-T Plus completely eliminates the early failure of the old-fashioned bimetal antenna, which not only significantly improves the reliability of the lamp during its lifetime. It also makes starting more convenient and starts up more quickly. At the same time, a special Zirconium aluminum gas-absorbing sheet (ZrAl) is used to effectively avoid the early failure and the occurrence of electrolysis caused by the use of the anti-gas sheet.
The arc tube used in SON-T Plus uses sodium mercury vapor and helium as the ignition gas. After 12000 hours of use, the lumen maintenance rate is still above 90%. At the same time, it is free of lead and contains low mercury (amalgam), which is very environmentally friendly and green.
Third, the application of high-efficiency high-pressure sodium lamp technology in road lighting <br> Generally speaking, road lighting costs are mainly composed of energy costs, maintenance costs, product procurement costs, power distribution and Other costs. Lighting product procurement costs are only part of the overall lighting investment. For the overall replacement project, the basic proportion of the cost of the entire road investment is 4:2:1:1.
Take a 10 km long road lighting project as an example, the comparison between Option 1 and Option 2:
name | Serial number | project | Option 1 | Option 2 | Comment |
Lighting conditions | 1 | Type of light source | A brand 250w | P brand 250W | Ballast consumes 25W |
2 | Type of lamp | A brand 250w | P brand 250W | ||
3 | Number of light sources / lamps | 1 | 1 | ||
4 | Light source luminous flux ( lm ) | 26,000 | 33,200 | ||
5 | Utilization factor (lamp efficiency) | 0.7 | 0.8 | ||
6 | Maintenance factor (including lamps, light sources) | 0.7 | 0.8 | ||
7 | Lamp exit maintenance full light (lm) | 12,740 | 20,480 | 4*5*6 | |
8 | Light source lifetime (h) | 18,000 | 32,000 | Due to high luminous flux, high reflection efficiency of the lamp, the same illumination can be achieved with fewer lamp turns | |
9 | Road length ( km ) | 10 | 10 | ||
10 | Total number of lamps | 800 | 540 | ||
11 | Total number of light sources | 800 | 540 | ||
12 | Electricity price unit (yuan / kWh) | 0.7 | 0.7 | ||
13 | Annual average light time (h) | 4,000 | 4,000 | ||
14 | Initial illumination ( lx ) | 35 | 32 | ||
15 | Maintenance illumination ( lx ) | 25 | 25 | Same illumination | |
Initial investment fee | 16 | Light source price (yuan / lighting) | 40 | 100 | For market virtual price, for easy calculation |
17 | Lamp price (yuan / only) contains electrical appliances | 800 | 1300 | ||
18 | Installation cost (yuan / only) with light pole | 8,000 | 8,000 | ||
19 | Total price of each set of lamps (yuan / set) | 8,840 | 9,400 | 16+17+18 | |
20 | Initial equipment cost (yuan) | 7,072,000 | 5,076,000 | 11*19 | |
Annual fixed fee | twenty one | Depreciation period (year) | 10 | 10 | |
twenty two | Installation and lighting price (yuan / set) | 8,800 | 9,300 | 17+18 | |
twenty three | All fixed facility fees | 7,040,000 | 5,022,000 | 11*22 | |
twenty four | Annual fixed fee (depreciation factor 0.19) | 1,337,600 | 954,180 | 23*0.19 | |
Annual operating fee | 25 | Annual light source replacement times | 177.8 | 70 | 10*13/8 |
26 | Annual light source replacement price (yuan) | 7,111.1 | 7,000 | 25*16 | |
27 | Replace a light source labor fee | 25 | 25 | ||
28 | Annual replacement of light source labor costs | 4,444.4 | 2,000 | 27*25 | |
29 | Annual maintenance fee (yuan) | 11,555.6 | 9,000 | 26+28 | |
30 | Annual average electricity consumption (yuan) | 572,000 | 400,400 | 275*13*10*12/1000 | |
31 | Annual operating fee (yuan) | 583,555.6 | 409,400 | 29+30 | |
in conclusion | 32 | Annual lighting fee (yuan) | 1,921,155.6 | 1,363,580 | 24+31 |
Under the same conditions, the option of using high-efficiency high-pressure sodium lamp and its supporting lamps and electrical appliances is more than 550,000 yuan, nearly 30%. It is of great practical significance to save the huge road lighting costs and fundamentally alleviate the current situation of power shortage in China without reducing the quality of lighting.
Fourth, the use of examples and promotion significance <br> In the 312 national road reconstruction project, the large-scale use of Philips' SON-T PLUS system.
In the overall implementation of the project, a total of 312 national roads were used: Kunshan section - 1000 sets of SGP268/250W SON-T system, SGP268/150W SON-T 800 sets; Changzhou section --- SGP268/400W SON-T 1085 Set, SGP268/150W SON-T 890 sets, the integrated investment makes this section of the road without the installation of street lights become the most eye-catching part of the shining pearl necklace of 312 National Road at night.
We learned from the conversation with the owner of the street lamp and the biggest beneficiary of the street lamp, the night driver, that after the installation work, the brightness of the road is completely up to standard, and the uniformity is good, which saves the owner and the maintenance cost. It also greatly improved the safety factor of road driving and achieved a true win-win situation.
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