GB 19761-2020 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 19761-2020 | English | 145 |
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Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Fan
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| GB 19761-2009 | English | 70 |
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Minimum allowable values of energy efficiency and energy efficiency grades for fan
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| GB 19761-2005 | English | 359 |
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The minimum allowable values of energy efficiency and evaluating values of energy conservation for fan
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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 Contents
Foreword... 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... 13
Foreword
This 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 Fan
1 Scope
This 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 References
The 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 Fans
3 Terms and Definitions
For 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 Grade
The 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 Requirements
5.1 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 Methods
The 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.
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