GB21258-2024

Norm of energy consumption per unit production of coal-fired power generation

燃煤发电机组单位产品能源消耗限额

GB 21258-2024 é uma norma nacional chinesa obrigatória vigente: Norm of energy consumption per unit production of coal-fired power generation. Setor: Construção. Foco: Segurança elétrica. Entrada em vigor: 1 de abr. de 2025.

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 the calculation, assessment, and energy consumption control of coal-fired power generation units, specifically focusing on power supply coal consumption rate and heating coal consumption rate. It covers existing, new, expanded, and modified units. It is not applicable to backpressure units and resource comprehensive utilization units. This standard replaces GB 21258-2017 and GB 35574-2017.

Requisitos técnicos

The standard establishes a three-tier energy consumption limit grading system for coal-fired power units based on pressure parameters and capacity levels. It specifies the limiting values for existing units and the access values for new, expanded, or modified units. It details various correction coefficients that must be applied to the base limits to account for operational and environmental factors. These include corrections for coal composition (volatile matter, ash, sulfur, moisture), cooling methods (direct, circulating, air cooling), and local temperature. Additionally, the standard introduces specific correction factors for unit load (output), altitude (for elevations $≥$ 2000m), and a specialized correction method for heating units' power supply coal consumption rate. Manufacturers and operators must calculate their actual energy consumption against these adjusted limits to ensure compliance.

Métodos de ensaio

Energy consumption calculation must comply with GB/T 2589 and the calculation methods for power supply and heating coal consumption rates should follow DL/T 904 and DL/T 1752. The statistical scope includes the total energy consumption for power and heat production, covering main, auxiliary, and affiliated production systems. The evaluation period for existing units is typically determined on an annual basis.

Perguntas frequentes

What products are regulated under GB 21258-2024?

GB 21258-2024 regulates the energy consumption per unit production of coal-fired power generation units, including both power supply coal consumption rate and heating coal consumption rate.

Are there any updates from the previous version of GB 21258-2024?

Yes, this version merges the previous GB 35574-2017 into GB 21258-2017. It updates the energy consumption limit values, modifies the technical requirements for limiting and access values, and adds new correction coefficients for altitude and heating units.

When does the implementation of the limiting values for existing units begin?

According to Section 7, the implementation of the unit product energy consumption limiting values for existing units begins on the 19th month after the publication of this standard.

The summary above provides a high-level overview of GB 21258-2024. 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 21258-2024 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 21258-2017, GB 35574-2017