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GB/T 42786-2023: Graduation and test methods on thermal comfort and visual comfort of building shading
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GB/T 42786-2023: Graduation and test methods on thermal comfort and visual comfort of building shading

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ICS 91.010.30 CCSP04 National Standards of People's Republic of China Building shading thermal comfort and visual comfort performance classification and Detection method buildingshading Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

PrefaceⅠ 1 Scope 1 2 Normative reference documents 1 3 Terms and definitions, symbols 1 4 rating 6 5 Test and calculation of optical parameters of sunshade materials 9 6 Thermal comfort and visual comfort performance testing and calculation 15 7 Test Report 20 Appendix A (normative) Double-beam spectrophotometer spectrum and accuracy 21 Appendix B (informative) Calculation example of total solar transmittance of sunshade product and glass window combination 25 Appendix C (informative) The total solar transmittance gtot classification of the combination is recommended 26 Appendix D (informative) Simplified calculation method for the total solar transmittance of the combination of diagonal external shading products and light-transmitting envelope structures 30 Appendix E (Normative) Reference Glass 39 Appendix F (informative) Recommended inner surface temperature of light-transmitting enclosure 42 Appendix G (Normative) Opacity Performance Tester 43 Appendix H (informative) Calculation of optical performance related to sunshade products with adjustable blade angle 45 Reference 55

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed and managed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China. This document was drafted by. Beijing China Construction Engineering Research Institute Co., Ltd., China Construction Engineering Bureau (Group) Co., Ltd., Guangzhou Construction Materials Industry Research Institute Co., Ltd., Zhejiang University Architectural Design and Research Institute Co., Ltd., Shanghai Construction Science and Technology Inspection Co., Ltd., Guangdong Provincial Construction Science and Technology Research Institute Group Co., Ltd., China Academy of Building Research Co., Ltd., Xiongan Green Research Inspection and Certification Co., Ltd., Beijing University of Architecture and Architecture University of Science and Technology, Hunan University, China Construction Science and Technology Group Co., Ltd., Tianjin Jianke Building Energy Saving and Environmental Testing Co., Ltd., Changzhou Institute of Building Sciences Tuan Group Co., Ltd., China Construction First Engineering Bureau Group Construction Development Co., Ltd., Tianjin 211 Station Inspection Technology Co., Ltd., Beijing Keer Construction Energy Saving Technology Co., Ltd., Guangxi Zhuang Autonomous Region Building Research and Design Institute, Guangdong Chuangming Shade Technology Co., Ltd., Tianjin Jinbeier Construction Construction Engineering Testing and Inspection Technology Co., Ltd., China Construction Second Bureau Third Construction Engineering Co., Ltd., Jiangsu Hengshang Energy Saving Technology Co., Ltd., Jiangsu Hengshang Energy Saving Technology Co., Ltd. Zhou Suming Decoration Co., Ltd., Weisen (Xiamen) Building Materials Industry Co., Ltd., Suzhou Construction Engineering Quality Inspection Center Co., Ltd., Shen Yangzi Weiheng Testing Equipment Co., Ltd., Shimadzu Enterprise Management (China) Co., Ltd., China National Accreditation Center for Conformity Assessment, PerkinElmer Enterprise Management (Shanghai) Co., Ltd., Beijing Sixth Construction Engineering Quality Inspection Institute Co., Ltd. The main drafters of this document. Ren Jing, Zhang Jinhua, Xue Gang, Wang Xianzhang, Duan Kai, Wang Changjun, Yue Peng, Ma Yang, Luo Tao, Ren Jun, Wang Suilin, Xiong Yaxuan, Feng Xuming, Peng Jinqing, Bai Qian, Qi He, Li Shengying, Wan Chenglong, Xu Ming, Zhang Jun, Zhan Bixiong, Wang Zhe, Wu Yazhou, Lu Linghuan, Lian Jianhua, Shang Jingyuan, Li Jun, Wang Xinbo, Wang Zhiyong, Zhu Yanming, Ji Ling, Wei Zhanhang, Li Zhenquan, Chen Xianhua, Zhang Bin, Qin Bing, Wang Guohua, Mu Lianbo, Lou Yanqiang, Li Huatao, Wang Leilei, Gao Yanrong, Xu Dandan, Gou Xinzhou. Building shading thermal comfort and visual comfort performance classification and Detection method

1 Scope

This document specifies the classification of thermal comfort and visual comfort performance of building shading, testing and calculation of optical parameters of shading materials, thermal comfort, visual comfort Sensory comfort performance test and calculation and test report. This document is applicable to the classification and testing of thermal comfort and visual comfort performance of building sunshade products. This document does not apply to materials with fluorescent or Sunshade products made of materials with retroreflective properties.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to the date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 2680 Architectural glass visible light transmittance, direct sunlight transmittance, total solar energy transmittance, ultraviolet transmittance and visible light transmittance Determination of window glass parameters GB/T 11976 Lighting performance classification and detection methods of building exterior windows GB/T 30592 Testing method for solar heat gain coefficient of light-transmitting envelope structures JGJ/T 151 Thermal calculation procedures for building doors, windows and glass curtain walls JG/T 274 General technical requirements for building sunshade JG/T 281 Test method for thermal insulation performance of building sunshade products JG/T 440 Testing method for shading performance of building doors and windows 3 Terms, definitions and symbols 3.1 Terms and definitions The terms and definitions defined in JGJ/T 151, JG/T 274 and the following apply to this document. 3.1.1 Thermal comfort performancethermalcomfort The thermal comfort performance of building shading mainly includes solar heat gain control performance, secondary heat gain control performance and direct transmission protection performance. 3.1.2 Solar gain control performance controlofsolargains When the sunshade product is fully extended and closed, it can reduce the building's cooling load in summer by reducing indoor solar heat gain. Evaluation parameters is the total solar transmittance. 3.1.3 The ratio of heat gain from solar radiation entering the room through the light-transmitting enclosure structure to the amount of incident solar radiation. ...