College of Architecture, Chongqing University City Yan Yonghong
Abstract: Two general lighting models of typical stores were established. Under the conditions of meeting the same quantity and quality requirements, the lighting schemes of eight common tungsten halogen lamps, energy-saving lamps and low-power ceramic metal halide lamps were used. Density comparison; and the energy service research model was used to compare the mercury pollution and greenhouse gas quantity generated by the corresponding light source during the whole life cycle; the problems encountered in popularizing low-power ceramic metal halide lamps were discussed.
Keywords: general lighting model; power density; energy service; environmental impact; tungsten halogen lamp/power ceramic metal halide lamp
1 Introduction In the total energy consumption ratio of shopping malls, lighting electricity accounts for more than 40%. From the perspective of the composition of China's power resources, 80% of the electricity comes from coal-fired power generation, and coal-fired coal will release a lot of harmful substances during power generation (see Table 4). Therefore, the promotion of high-efficiency, low-pollution light sources has a positive effect on reducing energy consumption, reducing environmental pollution, and mitigating environmental stress.
In order to understand the use of various types of lighting products in large and medium-sized shopping malls, from 2002 to 2005, we conducted an investigation and actual measurement of the lighting status of 18 new and renovated large shopping malls in the main city of Chongqing . The results show that the largest amount is 18~42W compact lamp, accounting for 85% of the total; followed by 35W, 50W low-pressure quartz tungsten halogen lamp, accounting for about 14%; and a small amount of high color rendering index (R. ≥ 80) The low-power (35W, 70W, 150W) metal halide lamps are also beginning to be used in store lighting, but the number is small, accounting for less than 1%. In order to compare the energy consumption differences between lighting solutions using different light sources, we have established two representative small store lighting models, using the above three types of light sources, selecting reasonable light distribution lamps, and using German Dialux V4.1 lighting. The design software compares the energy consumption of different lighting schemes with the amount of light. All calculation results were corrected by actual measurement. In addition, to further understand the impact of these three types of light source with the environment do not, to our energy services during their whole life can be provided (see below), the energy consumption and the number of major pollutants discharged therefrom were compared Calculation.
2 Comparison of lighting model energy consumption 2.1 Lighting model design Research range: general lighting in stores.
Lighting model size:
Model A: plane size 8.1m × 4.8m, net height 3 meters;
Model B: plane size 8.1 m × 4.8 m, net height 4 m;
Indoor surface reflection coefficient Tl: 20% of the ground, 50% of the wall, 70% of the ceiling;
Lighting standard requirements:
According to GB 50034.2004 "Architectural Lighting Design Standards" related regulations.
Lighting standard value - 0.75 m horizontal plane (working surface) average illuminance = 5001x, light source color rendering index R ≥ 80, UGR ≤ 22, see Table 5.2.3 of "Architectural Lighting Design Standards";
Illumination uniformity - the working surface is not less than 0.7, see Article 4.2.1 of the Architectural Lighting Design Standards;
Maintenance factor - 0.7, see Table 4.1.6 of the Architectural Lighting Design Standards;
Light source and luminaire: see the table below. The luminaires are made of WAC wattage products in the United States; the light source is Philips products. Among them, the measured power of the lamp includes the lamp. The general lighting of the lamp is in the form of uniform ceiling lighting. All the lamps are consumed, and the measured luminous flux includes the efficiency of the lamp.