GB21257-2024

Norm of energy consumption per unit production of caustic soda, PVC, methane chloride

烧碱、聚氯乙烯树脂和甲烷氯化物单位产品能源消耗限额

GB 21257-2024 は現行の中国強制国家規格です：Norm of energy consumption per unit production of caustic soda, PVC, methane chloride。業界：建設。テーマ：エネルギー効率。施行日：2025年5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 and assessment of energy consumption for production enterprises of caustic soda (via ion-exchange membrane electrolysis), polyvinyl chloride (PVC) resin, and methane chloride. It is also applicable for energy consumption control in new, reconstructed, and expanded projects within these industries. It does not apply to diaphragm process caustic soda production. The standard specifically targets dichloromethane and trichloromethane, excluding monochloromethane and carbon tetrachloride.

技術要求

GB 21257-2024 establishes a three-tier energy consumption limit system for the specified chemical products, where Tier 1 represents the lowest energy consumption. For existing facilities, the energy consumption must meet the Tier 3 limits. New and expanded facilities must comply with the stricter Tier 2 requirements. The standard defines the statistical boundaries for production systems, auxiliary systems, and affiliated systems, detailing what is included and excluded in the energy calculation. It also specifies the treatment of recovered energy, externally supplied energy (like hydrogen), and energy-consuming working fluids. The calculation methods for comprehensive energy consumption per unit product are provided for each product category, considering different production processes such as calcium carbide, ethylene, and combined methods for PVC.

試験方法

The standard outlines calculation methods rather than physical testing procedures. It requires the calculation of comprehensive energy consumption per unit product based on statistical data of energy inputs and outputs. The calculation involves converting various energy sources into kilograms of standard coal equivalent (kgce) using specified conversion factors. The standard provides detailed formulas for calculating the energy consumption of electrolysis units, processing units, and specific production processes for each chemical product.

よくある質問

What products are regulated under GB 21257-2024?

The standard regulates energy consumption for caustic soda (ion-exchange membrane method), polyvinyl chloride (PVC) resin (various methods including calcium carbide and ethylene), and methane chloride (specifically dichloromethane and trichloromethane).

What are the key changes from the previous versions (GB 21257-2014 and GB 30527-2014)?

The 2024 version integrates the previous standards, introduces a three-tier energy consumption limit system, adds energy consumption limits for methane chloride, and updates the calculation methods and statistical scopes for caustic soda and PVC.

What is the difference between the requirements for existing and new facilities?

Existing facilities must comply with the Tier 3 energy consumption limits, while new, reconstructed, and expanded facilities must meet the more stringent Tier 2 limits.

The summary above provides a high-level overview of GB 21257-2024. 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 21257-2024 today to access all detailed parameters, tables, and calculation 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