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 21257-2024은(는) 현행 중국 강제 국가 표준입니다: Norm of energy consumption per unit production of caustic soda, PVC, methane chloride. 산업: 건설. 주제: 에너지 효율. 시행일: 2025년 5월 1일.

적용 여부는 제품 범위, 인증 경로, 주관 당국 공고, 전환 규정에 따라 달라집니다. 컴플라이언스 판단에 사용하기 전에 번역을 의뢰하거나 공식 출처를 확인하세요.

컴플라이언스 개요

이 개요는 현재 영어로만 제공됩니다.

적용 범위

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.

기술 요구 사항

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.

시험 방법

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.

자주 묻는 질문

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.

적용 참고 사항

유형: 관리
CCS: F01
ICS: 27.010
주관 부처: Standardization Administration of China
기술 위원회: National Technical Committee on Energy Fundamentals and Management of Standardization Administration of China