The newly revised "Architectural Lighting Design Standards" (GB 50034-2004) has been released and will be implemented as of December 1, 2004. The new standard was revised after the merger of the original "Industrial Enterprise Lighting Design Standards" (GB 50034-92) and the original "Civil Architectural Lighting Design Standards" (GBJ 133-90). The illuminance level of the new standard has been greatly improved; the standard of lighting quality standards has been in line with international standards, and the glare limitation and color rendering of each room or place have been quantified; the addition of office, commercial, hotel, hospital, school and There are other technical changes to the maximum allowable value of the lighting power density (LPD) for seven buildings such as industry. In general, the new standards are close to or reach the level of international standards of the same kind. A summary of the main revisions in the new standards is presented. 1 Illumination standard value 1.1 Illumination standard greatly improved the illumination level of some major rooms and places, and the average illumination standard value of general lighting increased by about 50% to 200%. It should be pointed out that from the perspective of the illuminance standards formulated, it is a mutation in more than a decade. For example, the original standard office illumination value is 150lx, while the new standard general office is 300lx, which doubles. From the actual survey data, the illuminance level is a process of continuous improvement in recent years, and it is in line with the current actual situation. The results of the survey show that the illumination of many rooms and workplaces has reached this level, thus proving that the new standard is feasible. 1.2 The new standard stipulates that the original standard of illuminance standard value specifies the high, medium and low illuminance values ​​for each location, and stipulates that the intermediate value is used under normal circumstances, while the new standard only specifies a fixed illuminance standard straight value, thus implementing the standard. More accurate, and consistent with the latest CIE illuminance standard values. However, it also has certain flexibility. According to the different visual working conditions and the different requirements of the building level and functional requirements, the primary illuminance standard value can be increased or decreased, but it can only be increased or decreased regardless of several conditions of improvement or reduction. Level one. This is in order to adapt to the visual working conditions and the different economic conditions and functional levels of each region. 1.3 Only the general illumination illuminance standard value is specified. The original industrial standard specifies the illuminance value of mixed illumination or general illumination, and the mixed illumination illumination is specified for the precision visual workplace. Considering the illumination design, only the illumination of general illumination is designed. For local illumination, part of it is the equipment configuration (such as machine tool light), and the other part may be the design configuration. Due to the change of the lamp power and the adjustable distance of the lamp from the working surface, etc. It is difficult to determine an accurate illuminance value. Considering that it is consistent with the CIE pro-standards, only the general illuminance standard value is specified, and the local illumination is specified to be 1.0 to 3.0 times the general illumination illuminance value of the place. 1.4 The new standard for the ambient illuminance standard value of the working surface is increased. The illuminance near the work surface can be lower than the illuminance of the work surface (except for the work surface illumination less than 200lx). Adjacent to the surrounding area is within 0.5m of the working surface. This is because the illuminance around the surrounding area is related to the illuminance of the working surface. If the illuminance distribution around the working surface drops rapidly, the illuminance changes too much, which may cause visual difficulty and uncomfortable discomfort. 1.5 stipulates that the design illuminance value deviation takes into account the need of lighting design lighting and the actual situation of non-connection of light source power and luminous flux. According to China's situation, it is stipulated that the design illuminance value and illuminance standard value may be -10% to +10%. Deviation. This deviation is only applicable to lighting installations with more than 10 fixtures; when less than 10 fixtures, the deviation is allowed to be exceeded. 1.6 The new standard fills the gaps in the original standard. The new standard supplements the lack of original standards, such as lighting standards for buildings in public buildings such as hospitals, schools, museums, exhibition halls, and airports. In industrial buildings, textiles and Lighting standards for major industries such as chemical fiber, pharmaceuticals, rubber, electricity, steel, pulp and paper, food and beverage, glass, cement, leather, cigarettes, chemicals and petroleum, wood and furniture manufacturing, filling the original standards blank. 2 About the quality of lighting 2.1 The new standard for the shading angle of the luminaire has been revised for the original standard awning angle. The original standard is to specify the shading angle of the direct type luminaire according to the average brightness of the light exit of the luminaire and the limit level of direct glare (the industrial standard is divided into five, the civil standard is divided into three, etc.); and the new standard stipulates the shading angle according to the average brightness range of the light source. The university's standard is equivalent to the new CIE standard. 2.2 Uniform Glare Value (UGR) for Indoor Lighting The original industrial and civil lighting design standards stipulate that the direct glare of indoor general lighting is limited according to the brightness limit curve. This limitation method is only for the glare of a single luminaire, and does not represent all the luminaires in the room. The total glare effect. Therefore, CIE proposes a formula for calculating the uniform glare value (UGR) based on the glare calculation formula of various countries. It is suitable for general lighting design of simple cubic room. The lamps are evenly spaced. The lamps are double-named. The observation position is generally at the midpoint of the longitudinal and transverse walls, and the line of sight is observed horizontally. This standard specifies the value of UGR for the main rooms and places.
1 2 Next Page
1 2 Next Page
Bluetooth Speakers,Bluetooth Speaker,Portable Speakers,Mini Speaker
Dongguan Guancheng Precision Plastic Manufacturing Co., Ltd. , https://www.dpowerchargers.com