Seek the energy-saving transformation scheme of street lamps ~ ~

Urban road lighting is divided into urban functional lighting (including road, bridge, tunnel and public square lighting) and urban night lighting. Urban functional lighting is an indispensable condition to ensure people's work and life; Urban landscape lighting can beautify the city, bring vitality and vitality to the city, enhance the image of the city, enrich people's lives and provide convenience for people's work and life. In a word, urban lighting reflects the economic strength and civilization of the city from one side.

Because lighting electricity accounts for 25%-30% of the total power generation, urban public lighting accounts for 30% of China's lighting electricity consumption, which is about 43.9 billion kWh. According to the average electricity price of 0.7 yuan/kWh, the annual expenditure is 30.7 billion yuan. With the development of urban and rural construction, the electricity consumption for lighting is increasing at the rate of 15% every year. The government spends a lot of money on urban lighting every year, and the task of lighting energy saving is also very arduous. Therefore, adopting scientific energy-saving methods to carry out energy-saving technological transformation of urban lighting will also make great contributions to building a conservation-oriented society.

First, the current situation of street lighting in China

At the end of 1990s, the construction of night lighting became another important link in the construction of urban municipal facilities. Large-scale construction of brilliant night lighting in various places has not only made achievements, but also aggravated the power shortage. There is a great contradiction between the general shortage of municipal expenditure and the increase of brilliant lighting at night, which exists in many cities in China to varying degrees. Due to the pressure of tight funds, a large number of street lamps and night lighting cannot bear the heavy lighting electricity bill after installation, and nearly half of the street lamps have to be turned off, resulting in a disguised waste.

According to the investigation of relevant government departments, the roads in small cities in China are almost empty after night 10 and after midnight 12. Even in such a bustling metropolis as Beijing, Shanghai and Guangzhou, there are few pedestrians and vehicles on the road after 2 am. This situation lasted until the street lights went out at 7 am. It is obviously unnecessary to maintain high illumination on urban roads during this time. In addition, the grid voltage is higher (230V-250V) during the period of low power consumption in the second half of the night, which will lead to abnormal lighting and glare of street lamps, increase the power consumption of street lamps, shorten their service life and increase maintenance costs.

In today's extremely tight municipal expenditure of cities at all levels, almost all cities and regions in China have adopted the power-saving method of unilaterally lighting street lamps and turning off lights in each train, which was abandoned by foreign countries in the 1970s and 1980s. This power saving method will lead to uneven distribution of road illumination and form a block shadow. At the same time, it has laid a great hidden danger to public security and traffic safety. For street lamp lighting equipment, it can not avoid the loss of street lamp life caused by the increase of grid voltage in the second half of the night, nor can it be regarded as real power saving. Therefore, this energy-saving method can not meet the requirements of building a harmonious society.

Second, lighting energy-saving is the main breakthrough of modern green lighting and government energy-saving projects.

Entering the 2 1 century, China's economic construction has made rapid progress. The rapid development of economy is inseparable from the massive consumption of energy. Non-renewable energy is decreasing and exhausted day by day, and the resource and environmental situation is very severe. Compared with the international advanced level, there are some problems in energy use in China, such as high consumption, great waste and serious environmental pollution. Energy conservation has become a problem that the state and enterprises must pay attention to.

One of the eight tasks put forward by the Central Economic Work Conference in 2006 is to "save energy and resources vigorously and accelerate the construction of a resource-saving and environment-friendly society." The Central Economic Work Conference also stressed that promoting energy and resource conservation "must achieve remarkable results". The Central Committee of the Communist Party of China's 11th Five-Year Plan proposes that the energy consumption per unit of GDP will be reduced by 20% by 20 10, and explicitly proposes that the energy consumption per 10,000 yuan of GDP should be regarded as a "hard indicator" to assess the work of governments at all levels.

In August 2006, Premier Wen Jiabao presided over the the State Council executive meeting, which discussed and adopted in principle the Decision of the State Council on Strengthening Energy Conservation, and put forward six requirements for energy conservation. At the same time, all regions and departments are required to fully implement the Scientific Outlook on Development, put energy conservation in a more prominent strategic position, and the provincial government takes overall responsibility for energy conservation work in the region and puts energy conservation work on the government's important agenda. At present, it is necessary to strengthen and improve macro-control, continue to promote system reform, strictly control the excessive growth of fixed assets, resolutely eliminate enterprises with high energy consumption and high pollution, and earnestly implement various energy-saving measures.

Under the guidance of the government's national policy of "building a conservation-oriented society", with the notice of the National Development and Reform Commission and other departments to implement the "bulletin system of GDP energy consumption indicators", the four major GDP energy consumption indicators are linked to the performance evaluation of cadres, and many energy-saving policies have been introduced throughout the country accordingly. In the government work report in 2006, all local governments should make clear the energy-saving and consumption-reducing targets this year, and the task is also very arduous.

In order to implement the medium-and long-term special plan for energy conservation and achieve the planning objectives, the National Development and Reform Commission launched ten key energy-saving projects proposed in the plan and made specific arrangements for implementation. Among them, green lighting and energy saving by government agencies have become one of the main contents of the top ten energy-saving projects. Lighting energy saving, especially urban road lighting energy saving, is an obvious breakthrough for government agencies to realize green lighting energy saving.

To create a conservation-oriented society, lighting needs to save energy, which has become an important part of many unit costs. Municipal roads, shopping malls, supermarkets, schools, hospitals, property, advertising, landscape lighting, government office buildings and other occasions lighting, resulting in huge electricity bills. In addition to encouraging the use of efficient light sources and efficient reflective lamps, it is also a very effective method to implement energy-saving control of "people-oriented, scene energy-saving", which can also reflect the civilization degree of a city or department.

Energy-saving is productivity, so it is necessary to increase competitiveness and realize a virtuous circle of the national economy. In order to increase profits; More need to save energy. Maybe you don't care about the value of saving, but the government also needs you to save energy, and our next generation also needs you to save energy, because saving is the wealth of the earth and saving is our future.

Third, the investment economic evaluation of street lamp energy-saving switch

More than 70% of the existing street lamps in China use high-pressure sodium lamps, with a design life of 24,000 hours (5 years). However, due to the backward technology of China's urban power grid, the line voltage fluctuation greatly exceeds the international standard, and even exceeds about 15% of the rated voltage in many areas, especially in the latter half of the night. Due to the reduction of power load, the grid voltage is sometimes close to 230V, resulting in the actual service life of street lamp bulbs being less than one year on average.

Energy-saving renovation of existing street lamps can achieve the following comprehensive benefits.

1, quick return, efficient enjoyment of energy-saving benefits, up to 20%-40%;

Take a prefecture-level city in Sichuan as an example. There are more than 5,000 street lamps in this city. The annual electricity bill100000 yuan. If the power saving rate is 30%, it will save more than 3 million yuan every year.

2, prolong the service life of lamps and equipment, and save maintenance costs;

In general, street lamps need to be replaced once a year, and the cost of replacing a light bulb (including ballast loss, labor, vehicles, etc. ) is 120 yuan. There are more than 5,000 street lamps in this city, and the cost of replacing street lamps alone is as high as more than 600,000 yuan every year. If the system is put into use, the high-precision voltage stabilizing function and slow slope power regulating function can make the grid voltage run stably, thus ensuring the normal lighting of street lamps, prolonging their service life, prolonging the service life of street lamps by more than 1.5 times, and reducing the maintenance cost. The funds saved year by year can be reinvested in municipal construction.

3. Improve the city's "lighting project", improve the influence and charm of cities and towns, promote the healthy development of communities, and enhance social benefits.

4. Facilitate people's travel, prevent social criminal activities and criminal cases, avoid frequent traffic accidents, further promote the standardization of social management order, and protect public facilities from damage.

Energy-saving transformation case

It turns out that the illumination of 250 watt high-pressure sodium lamp is 35LX.

After using 150W low frequency electrodeless lamp, the average illumination is 50LX.

Save 65,438+000 watts per lamp. According to the average electricity tariff of 0.7 yuan/kWh, the average energy saving per street lamp is 0.07 yuan 1 hour, 0.7 yuan 100 hour, 7 yuan 1000 hour, 8760 hour, 70 yuan 6 13.2 yuan 365 days a year.

5000 street lamps can save 3066000 yuan a year.