Choosing a mixed light source: There is a certain requirement for the color and color rendering of the illuminated place, so the sodium lamp is mixed with the fluorescent high pressure mercury lamp. Select the light mixing scheme and the mixing ratio: in order to achieve a color rendering index of 50 to 60, the light mixing scheme should be composed of NGx250+GGY400, and the mixing ratio is 52:48. Choosing a mixed light fixture: According to the selected light source and the calculated height, the HR-GC204 strip-shaped block light mixing lamp is selected, the efficiency is 76.5%, the protection angle is 18°, the light distribution is reasonable, and the light mixing is relatively uniform. (5) Estimate the number of lamps, check the estimated curve of the selected lamps, and obtain 16 sets of lamps. Arrangement of lamps and light sources: The uniformity of the illumination and the uniformity of the mixed light are required. Therefore, the lamps and the staggered light sources should be evenly arranged, and a total of 21 sets of lamps are required. These include 6 sets of accident lighting fixtures set up in accordance with the requirements of the Ming technical regulations. Incandescent lamps are accident lighting sources.
The color rendering performance meets the requirements for color recognition in production operations. However, it is slightly inferior to the second scheme. The second option is the best, except for the medium temperature, the other parameters are the highest. The reader must not only ask: Why not use the second scheme is the reason: the construction drawing design of Tieling Power Plant started in 1990, and the information about the light source that was learned at that time was: the quality of the metal halide lamp was not stable enough, and the price of the bulb and ballast was partial. High, afraid of affecting the quality of lighting and breaking through the project budget, it was not adopted. The author suggests that in the future, the use of metal halide lamps and high-sodium metal halide mixed lamps should be actively promoted.
Light environment comprehensive evaluation illuminance test To verify whether the lighting design is correct, to verify the theoretical illuminance calculation and the actual lighting consistency, we have carried out illuminance test and test data on the turbine room lighting. The illuminance test results show that the calculated illuminance is consistent with the measured illuminance (except for the accident lighting), indicating that it is correct to calculate the illuminance on the working surface by the utilization coefficient method.
Light environment impression evaluation To verify the actual effect of mixed light illumination, we went to the scene to experience visual life. In the steam engine room, we observed the shape of the mixed light fixture and the light mixing and light color in the lamp; observed the arrangement of the lamp and the light source and the spatial mixing and light color; observed the uniformity of the illumination and the mixed light on the illuminated surface. Degree; observed the color of the turbine, electrical and other equipment and the clarity of various types of indicators; also observed the authenticity of the color of red, yellow, blue helmets and workers' clothes. Through personal experience, the impression of the light environment is: the factory is bright, the objects in the field of view are clear at a glance; the light color is good, giving people a pleasant, pleasant and pleasant feeling; the illumination is even, there is no light spot on the illuminated surface; There is no stain on the surface; the color rendering performance is good, and the color of the object being photographed is true.
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