GB24500-2020
Minimum allowable values of energy efficiency and energy efficiency grades of industrial boilers
工业锅炉能效限定值及能效等级
GB 24500-2020 is a current mandatory Chinese national standard for Minimum allowable values of energy efficiency and energy efficiency grades of industrial boilers. It appears in the Construction compliance cluster with a energy efficiency focus and has an implementation date of Jun 1, 2021.
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 applies to fixed industrial boilers utilizing coal, natural gas, oil, biomass, or electricity as fuel, with water or organic heat transfer fluids as the medium. It specifically covers steam boilers (rated pressure ≥ 0.1 MPa and < 3.8 MPa), hot water boilers (rated power ≥ 0.1 MW), and organic heat carrier boilers (rated outlet pressure ≥ 0.1 MPa). Manufacturers must verify if their boiler types fall under these specific pressure and power thresholds to ensure compliance. It references GB/T 2900.48 for relevant terminology.
Technical requirements
The standard categorizes industrial boiler energy efficiency into three grades, where Grade 1 represents the highest efficiency. All efficiency grades must be achieved while simultaneously meeting the initial emission concentration requirements. The standard establishes specific thermal efficiency limits based on fuel types (such as bituminous coal, anthracite, biomass, natural gas, and oil) and combustion methods (e.g., stoker firing, fluidized bed combustion, and chamber firing). For organic heat carrier boilers, the thermal efficiency must meet at least the Grade 3 requirements if waste heat recovery is utilized; otherwise, it must meet the design value. Electric heating boilers are subject to a strict minimum thermal efficiency requirement of 97%. The 2020 version introduces new parameters for gas-fired condensing boilers, defining their specific efficiency limits based on both lower and higher heating values.
Testing methods
Thermal efficiency testing under rated conditions must be conducted in accordance with GB/T 10180. For gas-fired condensing boilers, the thermal efficiency test may alternatively be performed following the procedures specified in NB/T 47066. Accurate testing according to these referenced standards is mandatory for certification.
FAQs
What products are regulated under GB 24500-2020?
It regulates fixed industrial boilers powered by coal, gas, oil, biomass, or electricity, including steam, hot water, and organic heat carrier boilers operating within specific pressure and power ranges.
Are there any updates from the previous version of GB 24500?
Yes, the 2020 version adds efficiency indicators for biomass boilers and gas-fired condensing boilers, and introduces specific requirements for organic heat carrier and electric heating boilers.
What is the minimum efficiency for electric heating boilers?
Electric heating boilers must achieve a thermal efficiency of no less than 97% under rated conditions.
The summary above provides a high-level overview of GB 24500-2020. To ensure complete compliance for your industrial boilers entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 24500-2020 today to access all detailed efficiency tables, fuel parameters, and testing procedures.
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 24500-2009