nike dunks LED avenue lamps anavenueet constructio

[zhu38919885]

Now 90WLED 250W high pressure sodium lamps and traditional lamps of the purchase, installation and maintenance, vigor costs is consist in ...:
one, lighting the gain cost:
traditional 250W high pressure sodium lamps of the market purchase price of 1,000 yuan; 90W of LED lights and the buy price of about 3500.
Second, the cost of laying cables:
Suppose a city with a long 3 km of roads absence apt setup street lights, street bulbs spaced 35 m / light,nike dunks,jordan 17 几米经典语录, to calculate the path of unilateral total of 86 street lights installed, br> 1, the traditional lofty oppression sodium lights with 250W (approximately 10% electrical power wastage, power element amends capacitor built 0.85),christian louboutin prive,atmosphere max 2009 Read generous people, the afford in the medium, then the work of the orthodox street circumference flow
I = 86 * 250 * (1 +10%) / 1.732 * 380 * 0.85 = 42.3A,christian louboutin because men 愿我的人生拥有这样, (also to encounter the line voltage drop)
it requires the laying of the cable to VV-4 * 25 +1 * 16mm2 of copper cable This cable is priced at 104 yuan / m, then the cable cost was 104 yuan / m * 3000 m = 312,000 yuan;
2,nikes dunk high, LED lamp circuit operating current I = 86 * 90/1.732 * 380 * 0.85 = 13.8 A, it requires the arranging of cables for the VV-5 * 4mm2 of copper cord, this wire is priced at 25 yuan / m, then the cable cost is 25 yuan / m * 3000 m = 75,000 yuan. Comparison chart below:
Category
3 公里 cost
laying cable laying per lamp per lamp LED lamps cost
lamp cable installation costs than traditional cost savings of traditional lamps
312000
Yuan
3628 yuan / light
2756 元
LED lights
75000 元
872 yuan / light
Third, the cost of running power:
lighting 10 hours a day and electricity cost namely 0.7 Yuan / annual of electricity expense reckoned 2 varieties of lights are as usual:
lamp high pressure sodium street lights per year, electricity consumption:
250W * ( 1 +10%) * 10 hours / day * 365 days = 1003.75 degrees
tariff is: 1003.75 degrees * 0.7 yuan / kWh = 703 yuan
lamp LED lights per year, electricity consumption :
90W * 10 hours / daytime * 365 days = 328.5 degrees
tariff is: 328.5 degrees * 0.7 yuan / kWh = 230 yuan per lamp
category
Each LED lamp lights
electricity than traditional street lights to retention electricity each year
traditional street
703 yuan / year
473 元
LED lights
230 yuan / year

IV, maintenance costs:
the current sale of the high pressure sodium light source,nike air max women, the standard voltage in the working surroundings can approach 15000-20000 hours of life can be likened to the standard voltage operating voltage there is a huge fluctuations in the light of the actual life of less than 6,000 hours (about 1.5 years), the average life of the ballast of about 2.5 -3 years; the single LED street lamps long life, low power consumption. LED can be used continuously for 50,000 hours, extra than 10 years of life, life-long need to replace light source, replace a traditional street lights, high livelihood costs merely will too cause a lot of inconvenience (mostly due to replacement of street light problems, to spend a definite sum of manpower. Machine resources to complete the operation will stop traffic.)
overall approximation table below:
No.
high pressure sodium street light project

LED lights
Note
1
equipment purchase costs (yuan)
1000
3500

2
installed cable cost (yuan)
3628
872

3
run on electricity (million)
703
230

4
replace the light source on the digit of
0.6

lamp life / light time of replacement of electrical
5
number of years
0.3

Electric Life / Work period
6
source price (yuan)
100
LED street lamps long life, cheap power consumption. LED can be secondhand continuously because 50,000 hours,nike shoes buy, the service life of up to 10 years, not need to replace light
the average market price of
7
electrical reference price (yuan)
250
8
years Maintenance chapters cost (yuan)
135
0
4 * 6 +5 * 7
9
the daily scampering spend
838
230
3 +8
As can be discerned from the above comparison table LED lights instead of traditional street lighting procurement cost of the surplus expenditure was 2,500 yuan, when the cost savings while installing the cable had 2,756 yuan, so a savings of LED lights running costs each year is the proceeds, the installation The longer the path the greater the cost savings, (the on does not comprise poles, installation and maintenance of mechanical and handbook fares and so on, in fact, the cost of installing LED lights are many lower than the cost of traditional street lights installed.)