GB/T 50908-2013 English PDF
Basic dataStandard ID: GB/T 50908-2013 (GB/T50908-2013)Description (Translated English): Evaluation standard for green office building Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: P33 Classification of International Standard: 91.040.01 Word Count Estimation: 172,196 Quoted Standard: GB/T 50033; GB 50034; GB 50118; GB 50189; GB/T 50314; GB 50325; GB/T 50378; GB 3096; Gb 6566; GB 18580; GB 18581; GB 18582; GB 18583; GB 18584; GB 18585; GB 18586; GB 18587; GB 18588; GB/T 18883; GB 19210; JGJ/T 163; GB/T 18091; GB 50176 Regulation (derived from): Announcement of the Ministry of Housing and Urban-Rural Development, No. 146 Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Summary: This standard specifies the new, green evaluate the design phase renovation and expansion of the types of government office buildings, commercial office buildings, research and office buildings, office buildings and integrated functionality similar to oth GB/T 50908-2013: Evaluation standard for green office building---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.1 General 1.0.1 This standard is formulated to standardize and guide office buildings to carry out green building evaluation work. 1.0.2 This standard is applicable to the green evaluation in the design stage and operation stage of various government office buildings, commercial office buildings, scientific research office buildings, comprehensive office buildings and other office buildings with similar functions newly built, rebuilt and expanded. 1.0.3 The evaluation of green office buildings should be based on individual buildings or building groups. Evaluation should conform to the following principles. 1 When evaluating a single office building, any indicators related to the outdoor environment shall be subject to the evaluation results of the surrounding environment of the office building; 2 When evaluating one or several office buildings in the building group, the indicators related to the outdoor environment shall be subject to the evaluation results of the surrounding environment of the site to which the participating buildings belong; 3 When evaluating a comprehensive office building, the evaluation object is at least one building, and any indicators related to multi-functional areas are expressed as the area-weighted values of the indicators of each functional area. 1.0.4 When evaluating green office buildings, the evaluation should be based on the principle of adapting measures to local conditions, combined with the characteristics of the climate, resources, natural environment, economy, and culture of the area where the office building is located. 1.0.5 When evaluating green office buildings, the relationship between energy saving, land saving, water saving, material saving, indoor environmental quality, and operation management should be dealt with in an overall manner during the life of the office building, and the economic benefits, social benefits and environmental benefits should be reflected. Unite. 1.0.6 When evaluating green office buildings, the adoption of passive technologies, appropriate technologies and technologies with significant comprehensive benefits should be encouraged. 1.0.7 The evaluation of green office buildings shall not only meet this standard, but also comply with the current relevant national standards. 2 terms2.0.1 Green office building In the whole life cycle of office buildings, save resources (energy saving, land saving, water saving, material saving), protect the environment and reduce pollution to the greatest extent, provide office staff with healthy, applicable and efficient use space, and live in harmony with nature building. 2.0.2 comprehensive office building A comprehensive building with an office building area ratio of more than 70% and mixed with shopping malls, residences, hotels and other functions. 2.0.3 building environmental quality building environmental quality Within the scope defined by the construction project, it affects the environmental quality of users, including the indoor environment, outdoor environment and the impact of the building system itself on the physical and mental health, comfort, work efficiency, convenience, etc. of the user's life and work, referred to as Q. 2.0.4 building environmental load building environmental load The impact or impact of the construction project on the external environment, including the consumption of energy, materials, water and other resources, pollutant discharge, noise, sunshine, wind damage, traffic flow increase, etc., referred to as L. 2.0.5 Building environmental load reduction building environmental load reduction The degree of reduction in the impact or impact of a construction project on the external environment, referred to as LR. 2.0.6 energy-saving rate of building envelope performance The percentage reduction in heating and air-conditioning loads achieved by the Design Building by optimizing the building envelope (excluding natural ventilation, natural daylight, and other passive energy-efficiency designs) compared to the Reference Building. 2.0.7 energy-saving rate of HVAC systems Compared with the reference building, the designed building saves energy by optimizing the air conditioning and heating and ventilation systems. 2.0.8 utilization rate of renewable energy The proportion of renewable energy used to replace conventional energy in designed buildings. 2.0.9 rate of rainwater harvest It refers to the ratio of the amount of rainwater actually collected and reused to the amount of rainwater that can be collected.3 Basic Regulations3.1 Evaluation index and weight coefficient setting 3.1.1 The green office building evaluation indicators and their weight coefficients should be divided into the following three levels. 1 The first-level indicators are land saving and outdoor environment, energy saving and energy utilization, water saving and water resource utilization, material saving and material resource utilization, indoor environmental quality, and operation management; 2 Second-level indicators refer to the indicators under the first-level indicators; 3 The third-level indicators are the provisions of Chapter 4 to Chapter 9 of the standard. 3.1.2 The evaluation indicators of green office buildings are divided into Q indicators of building environment quality and LR indicators of building environment load reduction according to attributes. 3.1.3 The third-level indicators are divided into control items and optional items. There is no weight factor for the control item. The sum of the weight coefficients of the same attribute index (Q index or LR index) at each level in the optional items is 1; when there are two scoring paths, the sum of the index weight coefficients of each scoring path is 1.The weight coefficients of the evaluation indicators at all levels shall be determined in accordance with the provisions of Appendix A of this standard, and the score setting of the three-level evaluation indicators shall be determined in accordance with the provisions of Appendix B of this standard. 3.1.4 The evaluation indicators for green office buildings should set weight coefficients respectively in the design phase and the operation phase. 3.2 Evaluation method 3.2.1 The evaluations at the design stage and the operation stage should be scored according to their respective weight coefficients. Green office buildings should meet the requirements of all control items. After all the control items meet the standards, the Q index and LR index will each receive 50 basic points. The optional Q index and LR index calculate scores separately. When there are two scoring ways, the construction project can use one of the scoring ways to score according to its own situation. 3.2.2 Index scores should be calculated step by step during evaluation, and should meet the following requirements. 1 The scores of the third-level indicators can be scored item by item by using the progressive or parallel 5-point system, and the score value of each item should be determined in accordance with the provisions of Appendix B of this standard. 2 The score of the secondary indicator shall be calculated according to the following formula. 3 The score of the first-level indicator should be calculated according to the following formula. 4 The scores of Q indicators and L indicators should be calculated according to the following formula. 5 Two decimal places should be kept in the calculation process at all levels; the scores of the Q index and L index of the project should be kept to one decimal place. 3.2.3 The grade of green office buildings should be determined according to the positions of the scores of optional Q indicators and L indicators in the QL diagram. Projects with scores in the three areas of A, B, and C are green office buildings, which are classified from high to low There are three grades of A, B, and C, corresponding to ★★★, ★★ and ★ respectively (Figure 3.2.3). Figure 3.2.3 QL classification diagram of green office buildings 3.2.4 When evaluating a comprehensive office building, other functional parts of the building shall be evaluated according to the corresponding evaluation standards, and the lowest grade among each functional part shall be taken as the final grade of the entire project.4 knots and outdoor environment4.1 Site selection control item 4.1.1 The site selection of buildings shall comply with the urban and rural planning and the construction requirements of various protected areas. 4.1.2 The construction site shall be free from the threats of flood disasters, debris flow and radon-containing soil, and shall not be affected by dangerous sources and major pollution sources. 4.2 Land use optional 4.2.1 On the premise of satisfying the local urban and rural planning and outdoor environmental quality, the site planning should determine a reasonable volume ratio. 4.2.2 The construction site should reasonably choose the abandoned site for construction. 4.2.3 Underground space should be rationally developed and utilized. 4.2.4 Site planning and architectural design should improve the efficiency of space utilization, promote the sharing of architectural space and facilities, and set up public open spaces shared with the outside world. 4.3 Outdoor environment control item 4.3.1 There should be no pollution sources with excessive emissions in the construction site. 4.3.2 Buildings should not affect the sunshine requirements of surrounding buildings and sites. optional 4.3.3 Environmental noise should comply with the relevant provisions of the current national standard "Environmental Quality Standard for Acoustics" GB 3096. 4.3.4 The outdoor daily average heat island intensity should not be higher than 1.5°C. 4.3.5 The wind speed at a height of 1.5 meters above the ground in pedestrian areas around buildings should not be higher than 5m/s, and the pressure difference between the front and back of the building should not be greater than 5Pa in winter. In summer, ensure an appropriate pressure difference between the front and back of the building to avoid vortices and dead ends. 4.3.6 Outdoor public activity areas and green spaces should have sunshine in winter. 4.3.7 Buildings should not cause light pollution to surrounding buildings, roads and the sky. 4.4 Transportation optional 4.4.1 There should be convenient connection between the construction site and public transportation. 4.4.2 Bicycle parking facilities and special sidewalks should be reasonably set up on the construction site. 4.4.3 The number and facilities of motor vehicle parking should meet the most basic needs, and multiple parking methods should be adopted to save land. 4.5 Site Ecology optional 4.5.1 The design of building site and building layout should be designed in combination with the existing topography to reduce damage to the original topography. 4.5.2 The topsoil in the construction site should be classified and collected, ecological restoration measures should be taken, and the topsoil should be fully utilized after construction. 4.5.3 Natural rivers, water bodies and wetlands in the site should be reasonably protected. 4.5.4 Surface and roof rainwater runoff paths should be reasonably planned to reduce surface runoff and reduce the amount of rainwater discharged into municipal pipes. 4.5.5 The green area rate of the construction site should be higher than the planning and design requirements, and three-dimensional greening methods such as roof greening and vertical greening should be adopted reasonably. 4.5.6 In the greening design, it is advisable to select native plants suitable for the local climate and soil conditions, adopt multi-layer greening including trees and shrubs, and the planting area has sufficient soil depth and good drainage. 4.5.7 For projects with water features, ecological water features should be reasonably designed in combination with water-saving measures such as rainwater collection.5 Energy Conservation and Energy Utilization5.1 Thermal performance optimization of envelope structure control item 5.1.1 The thermal performance index of the envelope structure shall comply with the provisions of the current energy-saving standards for public buildings approved or filed by the state. optional 5.1.2 The thermal performance index of the enclosure structure should be higher than the current national or local energy-saving standards. 5.1.3 External windows or transparent curtain walls should adopt external sunshade design. 5.1.4 The non-transparent part of the enclosure structure should adopt thermal insulation improvement measures tailored to local conditions. 5.2 Utilization of natural ventilation and natural lighting optional 5.2.1 The main orientation of the building should choose the best orientation or close to the best orientation in the area. 5.2.2 Buildings should adopt reasonable window opening design and other measures to enhance natural ventilation and reduce heating and air conditioning loads. 5.2.3 The main indoor and underground functional spaces should adopt reasonable natural lighting measures to reduce lighting energy consumption. 5.3 Heating, ventilation and air conditioning systems control item 5.3.1 The cold and heat source design of the air conditioning and heating system shall comply with the mandatory provisions of the current national and local public building energy conservation standards and relevant energy conservation design standards. optional 5.3.2 The heating, ventilation and air conditioning system should choose a reasonable system form, improve equipment and system efficiency, optimize control strategy, and reduce system energy consumption. 5.3.3 The energy efficiency ratio of the cold and heat source units of the air conditioning and heating system should be higher than the relevant provisions of the current national standard "Design Standards for Energy Conservation of Public Buildings" GB 50189 and related standards. 5.3.4 The efficiency of the transmission and distribution system of the heating, ventilation and air conditioning system should be higher than the relevant provisions of the current national standard "Design Standard for Energy Conservation of Public Buildings" GB 50189. 5.3.5 When the building is under partial cooling and heating loads and only part of the space is used, effective measures should be taken to save energy consumption of heating, ventilation and air conditioning systems. 5.4 Lighting system control item 5.4.1 The lighting power density value of each room or place should not be higher than the relevant mandatory provisions of the current national standard "Architectural Lighting Design Standard" GB 50034. optional 5.4.2 Lighting lamps and their accessories should reasonably use high-efficiency light sources, high-efficiency lamps and low-loss lighting accessories to reduce energy consumption for building lighting. 5.4.3 The lighting system should reasonably design the control mode to reduce the energy consumption of building lighting. 5.5 Other energy-using systems optional 5.5.1 The elevator system should reasonably select high-efficiency energy-saving elevators and reasonable control methods to reduce the energy consumption of building elevators. 5.5.2 High-efficiency and energy-saving equipment should be selected for the water supply and drainage distribution system, and the water supply and drainage system should be reasonably designed to reduce the energy consumption of the water supply and drainage system. 5.5.3 The domestic hot water system should adopt an efficient energy utilization system to reduce the energy consumption of domestic hot water. 5.5.4 High-efficiency energy-saving equipment and reasonable control methods should be reasonably selected for power transmission and distribution and transformation and distribution systems to reduce the loss of building power transmission and distribution and transformation and distribution systems. 5.6 Utilization of renewable energy optional 5.6.1 Renewable energy should be used reasonably according to local climate and natural resource conditions. 5.7 Measurement, monitoring and control of energy-consuming equipment optional 5.7.1 The energy consumption metering and energy-consuming equipment monitoring system should be properly set up.6 Water saving and utilization of water resources6.1 Water system control item 6.1.1 In the program planning stage, a water resource planning program should be formulated to coordinate and comprehensively utilize various water resources. 6.1.2 The setting of water supply and drainage system should be reasonable and complete. The form of hot water supply system should be reasonably determined according to the characteristics of water use. 6.2 Water saving measures optional 6.2.1 Effective measures should be taken to avoid pipe network leakage. 6.2.2 The water supply system should not have overpressure outflow. 6.2.3 Water meters should be set up by area and purpose. 6.2.4 The water efficiency level of sanitary appliances should reach the water-saving evaluation value. 6.2.5 Water-saving equipment should adopt water-saving equipment or water-saving measures. High-efficiency water-saving irrigation methods should be adopted for green irrigation. 6.2.6 The cooling water system should adopt water-saving cooling tower equipment such as circulating cooling towers, closed cooling towers, or other cooling water-saving measures. 6.3 Use of non-traditional water sources control item 6.3.1 When non-traditional water sources are used, water safety measures shall be taken to prevent adverse effects on human health and the surrounding environment. 6.3.2 Landscape water should not be supplied by municipal water supply or self-provided groundwater well. optional 6.3.3 When there are municipal reclaimed water utilization conditions around the project, the utilization rate of non-traditional water sources should not be lower than 40%; when there are no municipal reclaimed water utilization conditions around the project, the utilization rate of non-traditional water sources should not be lower than 15%. 6.3.4 When there are municipal recycled water utilization conditions around the project, the utilization rate of recycled water should not be lower than 30%; when there is no municipal recycled water utilization condition around the project, the utilization rate of recycled water should not be lower than 10%. 6.3.5 The rainwater reuse rate should not be lower than 40%.7 Material saving and utilization of material resources7.1 Utilization of material resources control item 7.1.1 Prohibit the use of construction materials and products prohibited and restricted by national and local construction authorities. optional 7.1.2 The existing buildings and structures within the scope of the site should be rationally utilized. 7.1.3 Building structures and accessories should be produced in factories. 7.1.4 Under the condition of ensuring safety and not polluting the environment, buildings should use reusable building materials, recyclable building materials and building materials produced with waste as raw materials, and the sum of their quality should not be lower than the total quality of building materials. 10% of the mass. 7.1.5 Decoration materials should be economical and applicable. 7.1.6 Based on the local resource conditions and development level, buildings should reasonably use new green environmental protection materials and ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 50908-2013_English be delivered?Answer: Upon your order, we will start to translate GB/T 50908-2013_English as soon as possible, and keep you informed of the progress. 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