GB28381-2012

Minimum allowable values of energy efficiency and evaluating values of energy conservation for centrifugal blower

离心鼓风机能效限定值及节能评价值

GB 28381-2012 es una norma nacional china obligatoria vigente: Minimum allowable values of energy efficiency and evaluating values of energy conservation for centrifugal blower. Sector: Construcción. Enfoque: Eficiencia energética. Entrada en vigor: 1 sept 2012.

La aplicabilidad depende del alcance del producto, la vía de certificación, los avisos de la autoridad competente y las reglas de transición. Solicite una traducción o verifique la fuente antes de usar esta ficha en una decisión de cumplimiento.

Resumen de cumplimiento

Este resumen está disponible por ahora solo en inglés.

Alcance y aplicabilidad

This standard applies to single-stage double-support low-speed centrifugal blowers, multi-stage low-speed centrifugal blowers, single-stage double-support high-speed centrifugal blowers (including double-inlet single-side impellers), and multi-stage high-speed centrifugal blowers. It is essential for manufacturers and importers of industrial centrifugal blowers in the Chinese market. Compliance with this standard is mandatory for specified blower types.

Requisitos técnicos

GB 28381-2012 establishes the minimum allowable values of energy efficiency and evaluating values of energy conservation for centrifugal blowers. Clause 5.3 of this standard is mandatory, requiring manufacturers to meet strict polytropic efficiency limits. Manufacturers must ensure their products meet these mandatory efficiency benchmarks to enter the Chinese market. The standard defines the calculation method for polytropic efficiency based on factors such as the polytropic index, adiabatic index, and inlet/outlet pressure and temperature. The energy efficiency limits are categorized by impeller diameter, impeller outlet width ratio, and the number of stages. Specific adjustments are mandated for certain designs: if a three-dimensional flow impeller is used, the efficiency limits must be increased by 5%. For cantilever-type single-stage double-support blowers, the efficiency limits must be increased by 1%. Engineers must carefully calculate these adjustments based on their specific impeller design.

Métodos de ensayo

The performance testing of centrifugal blowers shall be conducted in accordance with JB/T 3165, which covers the thermal performance testing for centrifugal and axial blowers and compressors. This ensures accurate measurement of the polytropic efficiency under specified standard test conditions.

Preguntas frecuentes

What products are regulated under GB 28381-2012?

It regulates various types of centrifugal blowers, including single-stage and multi-stage, low-speed and high-speed models, specifically those with double-support structures.

Is GB 28381-2012 a mandatory standard?

Yes, Clause 5.3, which specifies the minimum allowable values of energy efficiency, is mandatory. The rest of the standard is recommended.

Are there efficiency adjustments for specific impeller types?

Yes, if a three-dimensional flow impeller is used, the efficiency limits must be increased by 5%. For cantilever-type single-stage double-support blowers, an additional 1% is required.

The summary above provides a high-level overview of GB 28381-2012. To ensure complete compliance for your centrifugal blowers entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 28381-2012 today to access all detailed efficiency tables, calculation formulas, and testing procedures.

Indicaciones de aplicabilidad

Tipo: Gestión
CCS: F01
ICS: 27.010
Organismo competente: Standardization Administration of China
Comité técnico: National Technical Committee on Energy Fundamentals and Management of Standardization Administration of China

Relaciones

Sustituida por:GB 28381-2026 (Próxima)