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Case study of school teachers' lighting energy-saving reform
The background of energy saving reform in school lighting:
In accordance with the relevant national standards, the classroom daytime illumination of not less than 200Lux, night illumination of not less than 150Lux. From the point of view of protecting vision health, reading under the condition of less than 150Lux and higher than 600Lux is harmful to the health of eyes. The classroom illumination most colleges and universities in China are higher than the standard, combined with human waste caused by unnecessary expenditures from the conservation of resources, considering the contribution to society and save the expenditure on energy saving lighting in college classrooms is very important.
Illumination uniformity of classroom and blackboard lamps
For the middle and primary school classrooms, the blackboard width is already well established (single 2 meters), the traditional fluorescent tube length is according to international standard fixed, for example the 32W/36W luminous body length of 1.2 meters, the length of the 58W luminous body is 1.5 meters. The blackboard is lighting will use traditional fluorescent lamp, lamp for 2 T8 32W/36W, because of the limitation of the length of the lamp, lighting the blackboard and illumination uniformity is far less than the GB50034-2013 or DB31/539-2011, if the lamp with 2 T8 58W for lighting, illumination uniformity index improved significantly. But there are still unqualified proportion, and the energy efficiency index, lighting power density of the classroom becomes large, often up to 9W/m2 index value. Because of the shape and light distribution of the light source, the LED lamp can be arbitrary and accurate, so that the illumination and illumination uniformity of the blackboard can be satisfied under the premise that the lighting power density is up to the requirements.
Long service life and low maintenance cost
The lighting lamp life and maintenance costs, on the national level, related to energy conservation and building a conservation minded society of the overall situation, because the shorter service life means increasing the tube production process and the energy consumption and pollution. For the use of units, related to the use of maintenance of material and human cost. The traditional fluorescent lamps, although there are known as the service life of lamp 8000-10000 hours, but due to the influence of ballast index, in 70% to maintain the service life of light output is only 6000-7000 hours, basic for a lamp every year. And LED lamps are currently in the maintenance of 70% to light output premise, the service life of up to 40 thousand -5 hours, can be achieved 5 years before changing.
Shenyang University
Fudan University
Anhui Agriculture University