He Kaijun: some views on the current energy-saving lighting

The day before, held in Beijing "2008 Green Lighting Forum", the Xiamen LED promotion center director He Kaijun to the audience participants discussed his views on the current energy-saving lighting. Director of his own words, will put forward a number of practical problems, I hope that through a hundred flowers bloom, a hundred schools of thought way to better implement Scientific Outlook on Development to achieve the goal of saving electricity".

He Kaijun believes that previously only from the academic and technical level to promote the development of energy-efficient lighting, energy-efficient lighting industry development present situation, the key is not a technical problem, the main problem is the reality of the system and mechanism of the problem, is the institutional arrangements and institutional capacity building problems.

Outdoor lighting electricity saving potential

First of all, he cited some data to analyze the energy consumption of outdoor lighting in china. He pointed out that in 2007 the country's total generating capacity of 32559 kwh, of which there are 13%, that is, the use of 423 billion 300 million kwh of lighting, which has another 30% for outdoor lighting, about 130 billion kwh. And only the city road lighting (including residential lighting) of the electricity consumed more than 50% of outdoor lighting electricity. In addition, the landscape lighting is also a large number of 500W ~ 1500W floodlight, spotlights. The outline of a building in Beijing is also a large number of lighting using incandescent lamp, preliminary estimated 100 thousand more than 25W incandescent lamp, if the incandescent lamp with 4 ~ 5W LED lamp or lamp with replace, the annual saving more than 80%; and the outdoor advertising lighting, especially the high bar most advertising lighting 8 400W metal halide lamp, an advertisement for a year consumption million degrees, electricity 6000-8000 yuan / year, if the use of solar cells and LED lighting can save 100%. Therefore outdoor lighting electricity has great potential for energy saving. Two, efficient energy-saving light source, lamps and the use of the controller is an effective way of energy saving

What the director said, at present a lot of high light source, such as high pressure sodium lamp, metal halide lamp, electrodeless lamp, the efficiency of many lamps have been more than 70%, and reasonable light distribution. Lamp control and energy saving technologies such as sodium lamp, metal halide lamp, electrodeless lamp, such as pressure regulation, pressure limiting, variable voltage, dimming technology can achieve the purpose of saving electricity. If in the middle of the night to automatically control all kinds of street lights, reducing the power consumption of 50% should be no problem, according to this calculation, the road lighting system is also possible to achieve energy saving of 30%. For road lighting, he suggested that the appropriate place to promote the use of solar photovoltaic and LED combined lighting system. He believes that solar photovoltaic and LED are semiconductor devices, both with direct current, low voltage, low current, no inverter and voltage regulator system, is the most energy efficient, low loss, the most scientific and reasonable combination of matching. If used for the following 6m street lights, trail lights, garden lights, etc., and the general market price of the laying of the city light circuit is not much difference, special terrain or lot will be cheaper, in the urban and rural integration in the promising.

On the LED street lamp, director of the view that there is a problem worthy of attention. That is, all over the country have launched LED street lamps, is said to have more than and 400 companies into production. Because without the scientific testing and verification, there is no strict detection which LED street lamp demonstration road up to the national "city road lighting design standards", blind promotion, front back repair, this year is next removed, the result is the blind horse, disorderly competition, quality is uneven in quality, serious waste of manpower, resources and energy.

Three, the implementation of national standards is the key problem of power saving

Where the director believes that the provisions of China's standard illumination level city road lighting design is made according to the standard of CIE, originally developed countries, such as Germany and Japan than the standard 1 times higher, can fully meet the needs of the function of road lighting. However, the existing urban road lighting brightness (illuminance) and generally exceeded the national standard. According to the Institute of architectural physics, Chinese Academy of building research, the average illuminance of 22 roads in the country's 10 cities was 66lx. The average illuminance ratio CJJ45 2006 "standard" city road lighting design regulations (20/30lx) high 2.2 ~ 3.3 times, even if all the newly installed streetlights, multiplied by 0.75 maintenance coefficient is higher than the 1.65 to 2.5 times. In addition, there are many cities in the measurement of the average illuminance of 100lx or more, and some even reach 130lx. This high degree of road brightness (illuminance) is not helpful to improve the road lighting effect, in fact, is a huge waste of energy. Therefore, if the practical implementation of national standards, the existing street lamps 50% no problem, if there is a problem is the implementation of Scientific Outlook on Development's implementation of the problem.

Four, construction and management of the implementation of energy saving

Where the director is heavy pointed out that due to historical reasons and problems of management system, our country city road lighting were owned by the highway, urban management, urban construction, gardens and other different departments, and to the power of the management department, the Department of transportation to city lighting management. Therefore, now China's outdoor lighting management main body is not clear, lack of coordination, not only to each department acting on its own, accurate statistics of a city outdoor lighting electricity, the Ministry of construction is also unable to carry out outdoor lighting energy saving responsibility, but also resulted in the loose all aspects of construction management, management system, operation mechanism is ineffective, widespread heavy construction, light management, maintenance, inspection, and lazy less supervision issues. Coupled with the operating mechanism of the unreasonable design, some local street maintenance fee is based on the use of electricity 14%16% computing Commission, that is to say the more electricity the higher the Commission, but such is the job