1 Scope
This national standard specifies energy efficiency grades, minimum allowable values of energy efficiency, evaluating values of energy conservation and test method for fans.
This standard is applicable to centrifugal and axial-flow fan for common use, centrifugal induced fan for industrial steam boiler, centrifugal blowing fan and induced fan for power boiler, axial-flow fan for power station and air conditioning centrifugal fan.
This standard id not applicable to the fan with special structure and special purpose, like ejector type ventilator and transverse flow type fan.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments (excluding amending error in the text) to, or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions of these references are applied or not. For undated references, the latest edition of the normative document is applicable to this national standard.
GB/T 1236 Industrial fans - 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-flow 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 purposes of this national standard, the following terms and definitions and one specified in GB/T l236 and JB/T 2977 apply.
3.1 Minimum allowable values of energy efficiency for fan
Guarantee value of minimal allowable efficiency of fan under the specified standard test condition.
3.2 Evaluating values of energy conservation for fans
Guarantee value of the minimum efficiency that the energy-saving fan shall reach, under the specified standard test condition.
3.3 Unit
Assembly consisting of AC motor and fan.
3.4 Service range
Range of operation of fan when the efficiency of a fan is larger than or equal to 90% of the maximum efficiency hereof, and the efficiency of the air-conditioning centrifugal fan unit with outer rotor electric motor is larger than or equal to 90% of the maximum unit efficiency; property range of use shown by fan sample
