Green lighting is one of the important contents of accelerating energy conservation and emission reduction and transforming the economic development mode. Through the transformation and upgrading of the past five years, up to now, the urban lighting management department of Taiyuan City has jurisdiction over 92,000 gongs of urban lighting street lamps, all of which use high-pressure sodium lamps with low energy consumption, high luminous efficiency, environmental protection, energy saving and strong penetrating power. The electricity consumption is 1.74 million kWh. In addition, the department has adopted a variety of comprehensive energy-saving measures in terms of management and operation. In the past five years, the province has implemented more than 86 million kWh of green lighting savings, saving more than 60 million yuan in electricity bills.
Green map review is good source
On May 24th, the construction drawing of Taixiao line lighting was placed on the table of Gao Yongsheng, the chief engineer of the Municipal Urban Lighting Management Office. There is also a “Taiyuan City Lighting Construction Drawing Design Review Formâ€, which is the construction unit’s project 7 days before the bidding, send it to the lighting management office for green lighting drawing review. The lighting department will organize relevant experts to review the project within 48 hours according to the engineering information provided by the builder including the starting and ending points of the project, the length of the road, the width of the motor vehicle, the number of lamps, the number and type of lamps, the type of power source, and the total power. Issue audit opinions and requirements.
In order to improve the energy saving and consumption reduction of urban lighting, the city lighting management office began to manage from the source according to the requirements of the “Taiyuan City Lighting Project Supervision Implementation Rulesâ€, which was newly built and rebuilt in the urban and rural areas of our city. The expanded urban lighting project strictly implements the lighting engineering drawing review system, and puts forward opinions on the lighting engineering design drawings that do not meet the relevant Ministry of Construction and the relevant national green energy-saving specifications. It is required to rectify according to the optimized scientific method, and at the same time forcefully promote the use of energy-saving and environmentally-friendly voltage regulators. New technologies, green energy-saving products such as box-type transformers, high-efficiency light source appliances, and high-efficiency lamps, to achieve energy-saving and emission reduction targets.
In the past, urban lighting used ordinary transformers. When the power was used, the voltage dropped and the street lights became dark. When the power was low, the voltage increased and the street lights became bright. Blind and faint, the street lamp is seriously damaged, the service life is reduced, and the light decays quickly. A light bulb can only be used for about one year. Since 2008, in the new construction and renovation of lighting projects, the city has replaced ordinary transformers with new energy-saving box-type transformers with voltage regulation and voltage regulation. At present, 66 sets of box-type transformers with energy-saving functions have been installed in Binhe East Road and South Central Ring Street, and more than 18,000 xenon lamps have been controlled to save more than 20% of electricity. The annual electricity consumption is 4.3 million kWh, saving more than 3.2 million yuan in electricity.
Starting from 2007, in the center of the south of the provincial victory street, north of the South Central Street, west of Jianshe Road, and east of Binhe West Road, the cable used for urban lighting is copper cable, and the copper cable is used outside the central area. The aluminum cable with a low cost of nearly 6 times is not only effective in theft prevention, but also saves raw materials. The use of urban lighting engineering cables for new construction, reconstruction and expansion in the future will also be implemented as such.
Since the green map review was carried out last year, at least 10% of electricity consumption has been saved through scientific calculations to improve the way of lighting and the spacing of street lamps.
Improve lighting trial new materials
The first use of incandescent lamps in the provincial street lighting is the first generation; the high-pressure mercury lamps used later are the second generation; currently the high-pressure sodium lamps are the third generation. The energy saving and consumption reduction work of urban lighting is also constantly explored and promoted. First, replace incandescent lamps with low-energy, low-efficiency, high-energy high-pressure mercury lamps with energy-saving lamps. The illumination of a 20-watt energy-saving lamp is equivalent to a 100-watt incandescent lamp. Since 2007, the municipal government has successively replaced mercury lamps. Up to now, more than 6,000 street lamps have been replaced by more than 125 watts of mercury lamps with high energy consumption and low light efficiency, and 110 watts of high-pressure sodium lamps with low energy consumption, high luminous efficiency, environmental protection, energy saving and strong penetrability.
Due to its good color rendering and power saving, LED lamps have been widely used as mature products for landscape lighting, replacing traditional neon lights and high-power wall washers. At night, the public will see LED lights flashing beautiful patterns in the bridges, the Victory Bridge, the Yingze Bridge, and the buildings along the street. The LED light of the same area is only 10% to 20% of the power of the neon, and its life is 5 to 10 times. Because the penetrating power of the LED lamp is not strong, it is used as a street lamp. What is the effect of functional lighting in the case of dim light such as rain or fog? The City Lighting Management Office actively assists in the trial of new energy-saving products. 6 streets including Taoyuan Road and Yingxin Street in the provincial capital were used. Taiyuan City, one of the 11 national low-carbon lighting research centers in the country named by the Ministry of Construction, recently conducted scientific experiments and data collection on new products such as LED lights.
The use of the lampshade can not be underestimated. In the previous lampshade, there was no reflector, and the reflection efficiency was not high, resulting in no light. Now the provincial street lights are all equipped with high-efficiency cut-off lamps, not only reflectors, but also fully enclosed tempered glass shades, the luminous efficiency has increased by at least 5%.
In addition to the use of energy-saving products in the selection of lamps, the switching time of street lighting in our city is also scientific and energy-saving. At present, the provincial street lighting has basically realized the adjustment of street lighting time according to the weather and latitude, according to weather and other weather factors, 71% of the urban lighting facilities have realized the "three remote" wireless monitoring and GPRS mode monitoring, unified control. In some small streets, an automatic switch controller is installed to perform point-by-point control to accurately turn on and off the light. Calculated by half an hour of error, 335.8 kWh of electricity can be saved throughout the year. In the surrounding areas of the city, the street traffic management mode is implemented in the streets with low traffic flow and low flow of people. At present, it involves more than 10,000 lamps in 46 streets of the provincial capital, saving nearly 6 million kilowatt hours, and saving more than 400 million yuan in electricity annually.
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