GB28381-2026

Minimum allowable values of energy efficiency and energy efficiency grades for blowers

鼓风机能效限定值及能效等级

GB 28381-2026 é uma norma nacional chinesa obrigatória que entrará em vigor: Minimum allowable values of energy efficiency and energy efficiency grades for blowers. Setor: Construção. Foco: Eficiência energética. Entrada em vigor: 1 de abr. de 2027.

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 general-purpose turbine blowers and positive displacement blowers transporting air with specific pressure and flow parameters. It covers mechanically supported centrifugal blowers, suspension centrifugal blowers (magnetic or air bearing), axial blowers, single-stage Roots blowers (positive and negative pressure), and screw blowers. It is mandatory for manufacturers producing these blower types for the Chinese market. It does not apply to blowers outside the specified flow, pressure, and temperature ranges.

Requisitos técnicos

The standard establishes a 3-tier energy efficiency grading system, where Grade 1 represents the highest efficiency. For turbine blowers, the standard sets limits on polytropic efficiency for mechanically supported centrifugal and axial blowers, and overall efficiency for suspension centrifugal blowers. For positive displacement blowers, including Roots and screw types, the standard regulates the specific work of compression per unit volume (volumetric specific energy). The minimum allowable values of energy efficiency correspond to the Grade 3 limits. Products must meet these Grade 3 limits to be legally sold. The standard also specifies that blowers not explicitly listed in the tables must have their efficiency grades determined using an interpolation method. Additionally, the standard mandates that the design, manufacturing, and quality of blowers must comply with relevant industry standards like JB/T 7258 and JB/T 4359. For suspension centrifugal blowers, the included drive motors and inverters must meet the energy efficiency requirements of GB 18613 and GB 30253.

Métodos de ensaio

Testing must be conducted under specified conditions: inlet pressure of 101.3 kPa, suction temperature of 20°C, and relative humidity of 50%. Turbine blowers are tested according to GB/T 25630, Roots blowers according to JB/T 8941.2, and screw blowers according to GB/T 3853. The standard provides specific formulas for calculating polytropic efficiency, overall efficiency, and volumetric specific energy based on test data.

Perguntas frequentes

What products are regulated under GB 28381-2026?

The standard regulates general-purpose turbine blowers (centugal and axial) and positive displacement blowers (Roots and screw) operating within specific flow and pressure ranges.

What are the key updates in GB 28381-2026 compared to the 2012 version?

The 2026 version expands the scope to include suspension centrifugal blowers, axial blowers, and screw blowers. It introduces a 3-tier energy efficiency grading system and adds requirements for overall efficiency and volumetric specific energy.

How is the energy efficiency grade determined for blowers not listed in the standard's tables?

For blowers with specifications not explicitly listed in the tables, the energy efficiency grade values must be determined using the interpolation method provided in the standard's appendix.

The summary above provides a high-level overview of GB 28381-2026. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 28381-2026 today to access all detailed parameters, tables, 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

Substitui:GB 28381-2012 (Vigente)