GB 19761-2009 (GB19761-2009)

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GB 19761-2009: PDF in English
GB 19761-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.120
F 01
Replacing GB 19761-2005
Minimum allowable values of energy efficiency
and energy efficiency grades for fan
ISSUED ON. OCTOBER 30, 2009
IMPLEMENTED ON. SEPTEMBER 1, 2010
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword . 3 
1 Scope .. 4 
2 Normative References . 4 
3 Terms and definitions . 5 
4 Technical requirements . 5 
5 Test methods . 10 
Minimum allowable values of energy efficiency
and energy efficiency grades for fan
1 Scope
This Standard specifies the energy efficiency grades, minimum allowable values of
energy efficiency, evaluating values of energy conservation and test methods for fan.
This Standard applies to general-purpose centrifugal fan and axial flow fan; centrifugal
induced-draft fan for industrial steam boilers; centrifugal pressure fan and induced-
draft fan for power station boiler; axial flow fan for power station; and centrifugal fan
for air-conditioning.
This Standard does not apply to jet fan, cross-flow fan, roof fan and other fans of
special structure and special purpose.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Standard, however, parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced
document applies.
GB/T 1236, Industrial fan – Performance testing using standardized airways
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 10562, Technical specification for general purposes axial fans
JB/T 10563, Technical specification for general purposes centrifugal fans
3 Terms and definitions
For the purposes of this Standard, the following terms and definitions and those
defined in GB/T 1236 and JB/T 2977 apply.
3.1
minimum allowable values of energy efficiency for fan
Minimum guarantee values of energy efficiency for fan under standard test conditions.
3.2 evaluating values of energy conservation for fan
Minimum guarantee values of energy efficiency for energy-saving fan under standard
test conditions.
3.3
unit
An installation comprising AC motor and fan.
3.4
service range
The range of operation within which the efficiency of air-conditioning centrifugal fan
unit of outer-rotor motor is greater than or equal to 90% of the maximum efficiency of
the unit, when the efficiency of the fan is greater than or equal to 90% of the maximum
efficiency of it; and the catalogue of fan shall give the service range.
4 Technical requirements
4.1 Basic requirements
The design, manufacture and quality of fan shall be as specified in JB/T 10562, JB/T
10563, JB/T 4357, JB/T 4358 and JB/T 4362.
4.2 Efficiency, pressure coefficient and specific rotational speed of fan
4.2.1 The calculation of efficiency of fan
where,
ηr – efficiency of fan, %;
......
(Above excerpt was released on 2018-04-23, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GB19761-2009