GB21346-2022
The norm of energy consumption per unit product of electrolytic aluminum and alumina
电解铝和氧化铝单位产品能源消耗限额
GB 21346-2022 is a current mandatory Chinese national standard for The norm of energy consumption per unit product of electrolytic aluminum and alumina. It appears in the Construction compliance cluster with a energy efficiency focus and has an implementation date of Jan 1, 2024.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard specifies the energy consumption limits for electrolytic aluminum and alumina production. It applies to the calculation and assessment of production energy consumption, as well as energy control for new, renovated, or expanded projects in these industries. It is mandatory for all existing and new facilities producing electrolytic aluminum and alumina. The standard references GB/T 2589 and GB/T 12723 for general terminology and calculation guidelines.
Technical requirements
GB 21346-2022 establishes a three-tier energy consumption limit system, where Level 1 represents the most advanced efficiency and Level 3 represents the basic mandatory limit. For electrolytic aluminum, the standard regulates parameters including liquid aluminum AC power consumption, comprehensive AC power consumption, and comprehensive energy consumption per ton of aluminum ingot. Existing facilities must meet Level 3 limits, while new and expanded projects must achieve Level 2 limits. For alumina production, the requirements are categorized based on the manufacturing process, specifically differentiating between the Bayer process and other methods such as the sintering or combined processes. The standard sets distinct process energy consumption and comprehensive energy consumption limits for each category. The standard also defines the statistical boundaries for energy accounting. It explicitly includes energy used by main production systems, auxiliary systems, and affiliated production departments, while specifying deductions for non-production uses like electrolytic desulfurization. Energy recovered from waste heat utilization devices must be accounted for appropriately within these boundaries.
Testing methods
The standard outlines specific calculation formulas rather than physical testing methods. For electrolytic aluminum, it details the calculation of liquid aluminum AC power consumption by deducting power losses from stopped cells, baking/startup phases, and external compensation busbars. For alumina, it provides formulas for calculating process energy consumption and comprehensive energy consumption, factoring in physical single consumption and steam condensate return water. Manufacturers must use these exact formulas to report compliance. Reference coefficients for converting various energy sources to standard coal equivalent are provided in the appendices, based on GB/T 2589 guidelines.
FAQs
What products are regulated under GB 21346-2022?
GB 21346-2022 regulates the energy consumption of electrolytic aluminum and alumina unit products. It covers both existing manufacturing facilities and new or expanded projects.
What are the main updates in GB 21346-2022 compared to previous versions?
This standard replaces GB 21346-2013 and GB 25327-2017. Key updates include restructuring the energy consumption limits into three levels (Level 1, 2, and 3), updating the specific limit values, and revising the calculation methods for liquid aluminum AC power consumption and comprehensive AC power consumption.
What is the difference between the energy consumption levels for existing and new facilities?
Existing facilities must comply with the Level 3 limits, which serve as the basic mandatory threshold. New, renovated, or expanded facilities must meet the stricter Level 2 limits to gain market access.
The summary above provides a high-level overview of GB 21346-2022. 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 21346-2022 today to access all detailed parameters, calculation formulas, and conversion tables.
Applicability hints
- Type
- Management
- CCS
- F01
- ICS
- 27.010
- Competent department
- Standardization Administration of China
- Technical committee
- National Technical Committee on Energy Fundamentals and Management of Standardization Administration of China
Relationships
Replaces:GB 21346-2013, GB 25327-2017