"Architectural Lighting Design Standard GB50034-2004" (hereinafter referred to as "Standard") is the most important standard for architectural engineers to design and apply lighting appliances. It includes quantitative indicators of various architectural lighting designs such as illumination, quality indicators, and lighting. Power density limits, lighting distribution and control, covering lighting standards and energy-saving standards for residential buildings, public buildings and industrial buildings, as well as â€œlight management and supervision contentâ€ for implementation, for implementing green lighting and promoting lighting technology advancement And the promotion of efficient lighting products has played an important role.
In recent years, with the continuous development of China's lighting technology, especially the continuous expansion of the latest generation of light source LEDs indoors and outdoors, coupled with the trend of energy saving and emission reduction, new requirements for architectural design standards have been put forward. In this context, the standard development unit, China Academy of Building Research, has also begun the revision of this standard. It is understood that the revision of this new standard is expected to take two years from the investigation to the completion of the draft for comments and approval.
Energy efficiency indicators will be stricter
"Standards should be based on human beings, create a good light environment, reflect the level of China's lighting technology and promote its development. It is scientific, practical and forward-looking, and it is closer to international standards in light of China's actual situation. The actual level of China is not only technically advanced, economically reasonable, but also easy to maintain, safe to use, save energy, protect the environment, protect health and green lighting.
Vice President Zhao Jianping of the Institute of Building Environment and Energy Conservation of the China Academy of Building Research pointed out. With the development of lighting technology and applications, the content of the standard needs to keep pace with the times. This standard revision will further tighten the energy-saving indicators and increase the indicator setting for LED applications.
LPD refers to the lighting power density, which is the lighting installation power per unit area of â€‹â€‹a building room or place, in watts per square meter. The LPD value is the main indicator for evaluating building energy efficiency. The LPD limit is defined, which is related to energy conservation and environmental protection in the field of lighting. It will promote the comprehensive consideration of lighting design and take into account the illumination level, lighting quality and lighting energy efficiency, and promote the application in design. Efficient light sources, ballasts, lamps and other products. In practical applications, the provisions of the LPD limits have become an important basis for the effective supervision and management of lighting design, installation, operation and maintenance by the competent authorities and energy conservation supervision departments.
A major change in the development of the GB50034-2004 standard is to increase the maximum allowable LPD of 108 common rooms or places in seven types of buildings, such as office, residence, commerce, hotels, hospitals, schools and industries, except for residential buildings. The LPD restrictions of other 6 types of buildings are mandatory standards, which is the first in the history of China's lighting design standards.
At present, the global energy conservation and environmental protection pressures are gradually increasing, and the significance of LPD values â€‹â€‹is also more prominent. It is understood that this standard revision, LPD values â€‹â€‹may be adjusted to make the LPD value more in line with the trend and requirements of energy saving, will focus on how to reduce the LPD value of existing buildings, and expand the energy saving of room types in public buildings. Standard regulations and other issues.
It should be noted that the specification of the LPD value and possibly further reduction can be a significant challenge for lighting design. For example, in the actual implementation of the standard, the LPD value that meets the energy-saving regulations and the aesthetic decoration requirements of the building are often â€œthe fish and the bear's paw can't have bothâ€, and it is also the most troublesome thing for the architect.
Some designers said that especially in hotel lighting design, incandescent lamps or halogen lamps are better in light control, etc. Many hotels include some foreign hotel chains, which will use incandescent lamps in large numbers when decorating, so that Energy-saving aspects will definitely exceed the standard, and energy-saving inspections will certainly not pass. This kind of energy-saving and decorative requirements cannot be both perfect and often cause conflicts between designers and Party A. "Is it focused on efficiency or energy saving? Or find a balance between the two, and the standard requirements need to be further clarified." Some designers say.
In addition, the realization of green environmental protection, energy conservation and emission reduction is one of the goals of standard setting. In addition to specifying the LPD value, for the realization of lighting energy conservation, industry experts have said that the energy saving of the control system is also very important and needs the attention of the industry. In terms of lighting energy consumption, in addition to the light source itself, the overall energy consumption of the lighting system is also very considerable. The energy saving of the control system is very important. Intelligent lighting can be realized through some control systems to achieve secondary energy saving or multiple energy saving.
Some experts even said that the LPD value may limit the number of lamps installed, but this should not be the whole measure of energy efficiency. The energy saving through intelligent lighting is considerable, and the status of lighting control should be higher than the LPD value. However, the regulation of LPD values â€‹â€‹by dimming technology is costly, and whether customers can accept high-cost things needs to be carefully considered.
It can be seen that although the trend of decreasing LPD value will be a huge challenge for lighting design, from a certain point of view, the design pressure and challenge brought by this energy saving requirement will also lead to more consideration in lighting design. Lighting products that help reduce energy consumption provide a broad space for LEDs to be energy efficient and easy to implement intelligent control.
LED writing standards faced problems
As the future lighting source, the technological development of LED can be described as ever-changing, the application field is expanding, and its application in the field of indoor lighting is widely optimistic. The revision of this new standard also takes the selection and use of LED light source into consideration, and increases LED application. The content of the venue and performance indicators is also a good opportunity for LEDs.
Architectural lighting design standards are application standards. Unlike general product standards, some of the parameters specified in the application standards will affect the survival and development of the entire industry and enterprises, and even the lighting design level of the entire country. Its importance is self-evident. In terms of promoting technological advancement in the field of lighting, the GB50034-2004 standard has improved many index requirements. For example, the standard illuminance standard value of the office in the standard "office building lighting standard value" has been raised from the original 150lx to 300lx, and the color rendering index is 60 increased to 80, high-end office illuminance standard value required to reach 500lx and so on. The implementation of the standard has had a great impact on the development of the lighting industry and has a great impact on the application of new products.
In the standard "light source selection" section, "lower-rooms, such as offices, classrooms, conference rooms, instruments, electronics, etc., should use thin-tube straight tubular fluorescent lamps; high-height industrial plants should be used in production. It is required to use metal halide lamps or high-pressure sodium lamps, or high-power small-diameter fluorescent lamps. In the case of halogen powder fluorescent lamps at the time, the standard implementation has promoted the market application of trichromatic fluorescent lamps. It also promoted the improvement of domestic lighting technology.
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