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 é uma norma nacional chinesa obrigatória vigente: Minimum allowable values of energy efficiency and evaluating values of energy conservation for centrifugal blower. Setor: Construção. Foco: Eficiência energética. Entrada em vigor: 1 de set. de 2012.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

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 ensaio

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.

Perguntas frequentes

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.

Indicações de aplicabilidade

Tipo: Gestão
CCS: F01
ICS: 27.010
Órgão competente: Standardization Administration of China
Comitê técnico: National Technical Committee on Energy Fundamentals and Management of Standardization Administration of China

Relações

Substituída por:GB 28381-2026 (Futura)