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 は現行の中国強制国家規格です：Norm of energy consumption per unit production of coal-fired power generation。業界：建設。テーマ：電気安全。施行日：2025年4月1日。

適用可否は製品範囲、認証ルート、所管当局の通知、移行規定によって異なります。コンプライアンス判断に使う前に、翻訳をご依頼いただくか公式情報源をご確認ください。

コンプライアンス概要

この概要は現在英語のみで提供しています。

適用範囲

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.

技術要求

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.

試験方法

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.

よくある質問

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.

適用のヒント

種別: 管理
CCS: F01
ICS: 27.010
所管部門: Standardization Administration of China
技術委員会: National Technical Committee on Energy Fundamentals and Management of Standardization Administration of China