Abstract: China's newly revised National Architectural Lighting Design Standard (GB50034-2004) was officially implemented in December 2004. This standard newly added the technical terms of lighting energy-saving design and management for the first time, using the illumination power density (LPD) indicator. To measure the energy efficiency level of architectural lighting design, this paper focuses on the investigation of the national energy efficiency standards of office buildings and the analysis of relevant energy efficiency standards at home and abroad, focusing on the work of National Architectural Lighting Design Standards (GB50034-2004). The study determines the process of the building's lighting power density indicators. The efficiency index of office building lighting power density specified in the standard has reached the international advanced level. Key words: Lighting design, lighting power density value (LPD) 1. Introduction The newly revised National Lighting Design Standard (GB50034-2004) was officially promulgated by the Ministry of Construction in April 2004 and implemented on December 1, 2004. The standard is based on the requirements of the Ministry of Construction and Construction [2002] No. 85, and is jointly researched and developed by the relevant standards research departments and experts under the support of the National Development and Reform Commission/UNDP/GEF China Green Lighting Project Promotion Project. The new version of the standard has three major characteristics. First, the illumination level is much higher than the old version of the 1992 version. Second, there is a higher requirement for the quality of architectural lighting. Third, the standard specifies the main lighting places for the seven types of buildings in China for the first time. The maximum power density value (LPD), which is the indicator of the electric power per square meter of building area. These seven types of buildings include office, commercial, hotel, hospital, school, and industrial buildings, with the exception of residential buildings. The power density limits for building lighting locations are defined as mandatory provisions in the standard. The promulgation of this standard fully reflects the need to meet the new situation and new requirements for building a well-off society in China. It is necessary to raise the illumination level and lighting quality to a new level and to move closer to the international advanced level. At the same time, it reflects the need to illuminate electricity. In order to improve the efficiency of utilization, maximize energy conservation, and promote the protection of resources and the environment to meet the general requirements of China's energy situation and sustainable economic and social development. This paper focuses on the research and setting method of the illumination power density value of office buildings in the process of drafting this standard. 2. Principles and methods for setting LPD indicators 2.1 Definition of LPD indicators Here are several important definitions related to lighting power density in the standard. Lighting Power Density—The standard uses Lighting Power Density (LPD) as an indicator of architectural lighting. The lighting power density is the total installed power density (W/m2) of the unit building area. The standard used for lighting power density (LPD) is the maximum installed power density per room, not the lighting power density of the entire building. Unit building area - refers to the area used by the room (m2), excluding the area used for public use. Total installed power - refers to the total installed power of the lighting system, which includes the power of the light source used, the total power of the ballast, current limiter, and lighting controller. The indoor lighting installation power should be the maximum indoor power (W). Lighting is calculated as a baseline. 2.2 The principle of setting the LPD indicator The general principle formulated by the National Lighting Design Standard (GB50034-2004) is based on the investigation and analysis of the actual situation and design of the current architectural lighting in China, with reference to the lighting energy-saving standards of some developed countries in the world, combined with China. The performance indicators of lighting products are scientifically formulated on the basis of demonstration and comprehensive economic analysis. The standards should promote the use of high-efficiency lighting products in China, promote scientific and rational optimization design and strengthen supervision and management measures to promote the development of green lighting in China. Important role. Therefore, the specific method for determining the LPD value in the standard is to grasp the efficiency of the current building lighting power consumption through the key survey survey and design census data results, collect relevant foreign standard information for comparative analysis, and organize experienced lighting design experts. Design verification for specific lighting places, feasibility analysis of the set LPD values, to ensure the rationality, scientific and advanced of LPD settings. It is worth mentioning that LPD, as an energy efficiency indicator in the standard, absorbs the internationally advanced energy-saving standard formulation method when determining the indicator, and divides it into two categories: current value and target value, giving full play to its lighting festival. The guiding role of electrical design. 3. Investigation and analysis of the lighting efficiency level of office buildings In order to grasp the current status and efficiency level of office building lighting in China, in the standard development process, a survey of lighting conditions in six major regions of the country was first organized. The survey was divided into key surveys and general surveys. (Census) Two parts, the key survey in Shenyang, Xi'an, Chengdu, Shanghai, Guangzhou, Beijing, selected 45 units of 32 conference rooms, 42 offices and 3 auxiliary rooms for the actual measurement of the lighting site. The census is a census of the lighting design of 61 conference rooms, 142 offices and 46 auxiliary rooms of 114 units in conjunction with the six major regional design institutes across the country. The results of the key site survey and design data census are summarized below. 3.1 Key survey results The key surveys mainly reflect the actual lighting power consumption of office buildings in China. In the survey, office buildings were divided into three categories: ordinary offices, conference rooms, and general office auxiliary rooms, which were classified according to different lighting power densities. The survey found that the office power density distribution is the largest in 10≤LPD<18 segments, accounting for 47.6% of the survey samples; the average lighting power density is 20 W/m2, and the ordinary conference room power density distribution is 10≤LPD<18 segments. The number is also the largest, accounting for 44.2% of the survey sample; the average LPD is 20.1 W/m2. The power density distribution of general office auxiliary rooms is basically distributed according to different applications. The power density values ​​are basically distributed in three areas: LPD<10, 10≤LPD<18, 28≤LPD<32, each accounting for about 33%, and the average illumination power density. It is 17.9 W/m2. 3.2 Census results The census of lighting design for major regional design institutes across the country mainly reflects the current design level of office building lighting power consumption. According to the classification method of key surveys, the survey found that the office power density distribution is the largest in 10≤LPD<18 segments, accounting for 61.7% of the survey samples; the average conference room power density distribution is the largest in 10≤LPD<18 segments. Accounted for 54.1% of the survey sample; the power density distribution of office auxiliary rooms except the warehouse and business halls in the LPD <10 majority, other office auxiliary buildings are still basically 10 ≤ LPD < 18 paragraphs, see Table 1. 4. Domestic and international energy efficiency standards for office buildings The introduction of lighting power density (LPD) regulations in lighting design standards is still a new thing for China. Previously, China has never adopted this indicator to formulate national or industry standards, only Beijing and Shanghai. There are local standards. The Beijing standard stipulates that the high-end office LPD is 20 W/m2 (the corresponding average illuminance is 500 lx), and the Shanghai standard stipulates that the office room LPD is 15 W/m2 (excluding ballast loss, the corresponding illuminance is 100-200 lx). ). There are only a few developed countries in foreign countries that have established relevant LPD standards. The US standard stipulates that the LPD value of the entire office building is 13.99 W/m2, the closed office and conference room are 16.15 W/m2, and the lecture hall is 17.22 W/m2. The warehouse is 10.76 W/m2, and the electrical room and machinery room are 13.99 W/m2. The LPD standard in Russia is 25 W/m2 for the office (corresponding to an illumination of 400 lx). In the Japanese standard, the conference room and office are 20 W/m2. The establishment of LPD value indicators in China's new architectural lighting standards is also ahead of the international arena. 5. LPD indicator determination analysis and results From the standard information that has been mastered at home and abroad, the lighting power density of ordinary office buildings is basically set at around 20W/m2, but from the key survey results of this study, China's conference room The LPD reached or exceeded 14, 20, 25 (W/m2), accounting for 89.7%, 44.7%, and 34.4%, respectively, and the office LPD accounted for 90.5%, 42.9%, and 31%. The results of the census showed that the LPD of the conference room reached or exceeded 14, 20, 25 W/m2, which were 86.9%, 32.8%, and 16.4%, respectively, while the office LPD was 88.7%, 27%, and 17.1%. It should be said that the lighting power density of offices and conference rooms in China is basically easy to achieve according to the design of 20 W/m2, and there is room for further improvement of lighting efficiency. Considering the requirements of different grades of office buildings, the classification of offices into ordinary offices and high-end offices should be in line with China's actual conditions. The key survey subjects of standard research are mostly high-end offices, and their average lighting power density is 20W/ M2, the survey results also show that more than half of the surveyed offices have LPD values ​​between 10 and 18 W/m2. The standard sets the LPD value for high-end offices to 18 W/m2 and the general office to 11 W/m2; for promotion and promotion. Lighting energy saving, the target value setting in the standard is basically considered to be lower than about 10% of the current value, and the target values ​​of the high-end and general office LPD standards are set to 15W/m2 and 9 W/m2, respectively. Through the approval of expert design, it is not a problem to meet the above-mentioned current value requirements if the light source and luminaires with superior performance and quality levels are currently available in the lighting market. As for the determination of the LPD value of the conference room, the survey results show that more than half of the conference room LPD values ​​are between 10 and 18 W/m2. The US standard is about 17W/m2, and Japan is 20W/m2. According to the illuminance level and survey results in China, the current value of the LPD standard in the conference room is set at 11W/m2, and the target value is set at 9 W/m2. According to the data, the lighting power density of foreign business halls is relatively high, mostly between 26 and 35 W/m2, while the survey results of the same places in China show that most of them are less than 10 W/m2, taking into account the illuminance level and corresponding investigation in China. As a result, the current value of the LPD standard for the business hall is set at 13 W/m2 and the target value is set at 11 W/m2. Regarding the office LLP, such as document sorting, copying and distribution room LPD values, only Russia has corresponding standards, and the value is higher than 25W / m2, taking into account the actual survey data and the corresponding illuminance level in the standard, the above office support The current value of the LPD standard for the house is set at 11 W/m2 and the target value is set at 9 W/m2. Most of the archives are between 10 and 18 W/m2. According to the corresponding illumination regulations in China, the LPD value is set at 8 W/m2 and the target value is set at 7 W/m2. Through the above analysis and expert design calculation, the maximum value of the office building lighting power density design finalized by the National Lighting Design Standard (GB50034-2004) is shown in Table 3. It can be seen from the LPD indicators in Table 3 that the lighting efficiency standards for office buildings currently implemented in China are quite high and have reached the international advanced level. Main References 1. Ministry of Construction "Industrial Enterprise Lighting Design Standards" GB50034-92 2. Ministry of Construction "Civil Building Lighting Design Standards" GBJ133-90 3. USA, IESNA, Lighting Handbook, 2000 4. Japan, JIS Z 9110-1970 , Japanese Industrial Foundation, Illumination Standard 5. Germany, DIN 5035-1990 Artificial Lighting Standard 6. United States, ASHRAE/IES 90. 1-1999, Building Energy Standards 7. Japan, Energy Efficiency Law for Lighting Reasonable Energy Standards - 1999
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