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GB 19761-2020: Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Fan Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB 19761: Historical versions
GB 19761-2020: Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Fan---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB19761-2020 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.010 F 01 Replacing GB 19761-2009 Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Fan Issued on. MAY 29, 2020 Implemented on. JUNE 01, 2021 Issued by. State Administration for Market Regulation; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 5 2 Normative References... 5 3 Terms and Definitions... 6 4 Energy Efficiency Grade... 6 5 Technical Requirements... 9 6 Test Methods... 13ForewordThis Standard was drafted as per the rules specified in GB/T 1.1-2009. This Standard replaced GB 19761-2009 Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Fan. Compared with GB 19761-2009, this Standard has the major technical changes as follows besides the editorial modifications. --- Adjust the scope, changing "air conditioning centrifugal fan" into "centrifugal fan for HVAC, forward multi-blade centrifugal fan"; clearly point out the type of fan products that are not applicable to this Standard (see Clause 1 of this Edition; Clause 1 of 2009 Edition); --- Add “GB/T 3235 Basic Types Sizes Parameters and Characteristics of Fans” to the normative references (see Clause 2 of this Edition; Clause 2 of 2009 Edition); --- Modify the definition of "plant" (see 3.2 of this Edition; 3.3 of 2009 Edition); --- Delete the definition of "energy-saving evaluation value of fan" and "use area"; delete the energy-saving evaluation value of fan (see 3.2, 3.4 and 4.5 of 2009 Edition); --- Modify the relevant content of "Basic Requirements" (see 5.1 of this Edition; 4.1 of 2009 Edition); --- Modify the energy efficiency grades of the double suction centrifugal fan, centrifugal fan for HVAC, axial flow fan and ordinary motor direct drive fan (see Clause 4 and Table 1~Table 4 of this Edition; 4.3 and Table 1~Table 4 of 2009 Edition); --- Modify the value range of "pressure coefficient ψ" in the related table of fan energy efficiency grade (see Table 1, Table 2, Table 4 of 2009 Edition); --- Add the content of "efficiency calculation of ordinary motor direct drive fan" (see 5.2.3 of this Edition). This Standard was proposed by Department of Resource Conservation and Environment Protection of National Development and Reform Commission; Department of Energy Conservation and Comprehensive Utilization of the Ministry of Industry and Information Technology; and Standardization Administration of PRC. This Standard shall be under the jurisdiction of Standardization Administration of PRC. Drafting organizations of this Standard. China National Institute of Standardization; Hefei General Machinery Research Institute Co., Ltd.; Hefei General Environment Control Technology Co., Ltd.; Shenyang Blower Research Institute Co., Ltd.; Jiangsu Yingdeli Industrial Co., Ltd.; Shanghai General Fan Company Limited; Beijing Xinante Fan Co., Ltd.; Xi’an Shaangu Power Co., Ltd.; Zhejiang Shuangyang Fan Co., Ltd.; Product Quality Supervision and Inspection Institute of Dezhou Product Inspection and Testing Institute; Shanghai Dehui Special Type Fan Co., Ltd.; Shanghai Nautilus General Equipment Manufacturing Co., Ltd.; Guangdong Zhaoqing Deton Co., Ltd.; and Jiangsu Jintongling Fluid Machinery Technology Co., Ltd. Chief drafting staffs of this Standard. Hu Sibing, Liu Ren, Rao Jie, Tian Qiyong, Liu Huhong, Gu Jiandong, Liu Tiehong, Gong Xinglong, Yao Yongli, Gu Haifeng, Ruan Miaoying, Cui Guangxin, Jin Shouqing, Mi Tiantian, Wang Hua, Qian Yanping, Hu Wenhong, and Bai Lu. The historical editions replaced by this Standard are as follows. --- GB 19761-2005, GB 19761-2009. Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Fan1 ScopeThis Standard specifies the energy efficiency grade, minimum allowable values of energy efficiency, test methods and technical requirements of the fan. This Standard is applicable to general-purpose centrifugal fans, general-purpose axial flow fans, centrifugal induced draft fans for industrial boilers, centrifugal fans for boiler of power station, axial flow fans for power station, centrifugal fans for HVAC, and forward multi-blade centrifugal Fan. This Standard is not applicable to duct fans for air conditioning, box fans, unhoused centrifugal fan, and fans with other uses and special structure.2 Normative ReferencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document. GB/T 1236 Industrial Fan - Performance Testing Using Standardized Airways GB/T 3235 Basic Types Sizes Parameters and Characteristics of Fans GB/T 10178 Industrial Fans-Performance Testing in Situ JB/T 2977 Technical Terms for Industry Fans, Turbo-Blowers and Compressors JB/T 4357 Centrifugal ID-Fan for Industry Boiler JB/T 4358 Centrifugal Fan for Boiler of Power Station JB/T 4362 Power Station Axial Fans JB/T 7221 Centrifugal Fan for Heating Ventilation and Air Conditioner JB/T 9068 Forward Curved Centrifugal Fan JB/T 10562 Technical Specification for General Purposes Axial Fans JB/T 10563 Technical Specification for General Purposes Centrifugal Fans3 Terms and DefinitionsFor the purpose of this document, the terms and definitions given in GB/T 1236, GB/T 3235, JB/T 2977 and the following apply. 3.1 Minimum allowable values of energy efficiency for fan Under the test conditions specified in the standard, the minimum guaranteed value of the fan's efficiency is allowed. 3.2 Plant Device composed of driving machine and fan.4 Energy Efficiency GradeThe energy efficiency grade of the fan is divided into three grades, of which the energy efficiency of Grade-1 is the highest, and the energy efficiency of Grade-3 is the lowest. The regulations are as follows.5 Technical Requirements5.1 Basic requirements The design, manufacture and quality of fan products shall conform to the provisions of JB/T 10562, JB/T 10563, JB/T 4357, JB/T 4358, JB/T4362, JB/T 7221, JB/T 9068. 5.2 Calculation of fan efficiency, pressure coefficient and specific speed 5.2.1 Calculation of fan efficiency The calculation of fan efficiency can refer to Formula (1). 5.2.2 Calculation of fan plant efficiency The calculation of fan plant efficiency can refer to Formula (3). 5.2.3 Calculation of ordinary motor direct drive fan efficiency The calculation of ordinary motor direct drive fan efficiency can refer to Formula (4). 5.2.4 Calculation of pressure coefficient The calculation of pressure coefficient can refer to Formula (5). 5.2.5 Calculation of specific speed The calculation of specific speed can refer to Formulas (6) and (7). 5.3 Minimum allowable values of energy efficiency for fan Use full-size fans to perform performance tests; and take the highest plant efficiency in the stable working area as the evaluation value of the energy efficiency grade. The minimum allowable values of energy efficiency fan are as follows.6 Test MethodsThe performance test of the fan shall be conducted in accordance with the provisions of GB/T1236 or GB/T10178. It is suitable for more than one type of test device fan, the type of test device closest to its application shall be selected. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB 19761-2020 be delivered?Answer: The full copy PDF of English version of GB 19761-2020 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB 19761-2020_English with my colleagues?Answer: Yes. 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