GB/T 41664-2022Evaluation method and test rules of low NOx oil and gas combustor (English PDF)
低NOx燃油燃气燃烧器评价方法与试验规则
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 11, 2022
Implementation date
November 1, 2022
Scope
GB/T 41664-2022 is the English-translated version of 低NOx燃油燃气燃烧器评价方法与试验规则.
GB/T 41664-2022 sets out how oil and gas burners with low NOx combustion characteristics are classified according to their NOx emission value. It specifies the evaluation conditions, the test rules and the evaluation methods, and applies to low NOx oil and gas burners; other burners may be dealt with by reference to it.
The document defines the terms it works with, among them combustion efficiency, the effective volume of the furnace and the heat released per unit of effective volume in unit time, the load regulating ratio and the excess air coefficient.
It cites GB/T 11062 and GB/T 13610 for the analysis of natural gas and GB 17411 for marine fuel oil. Issued on 11 July 2022, it has applied since 1 November 2022.
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Document preview — GB/T 41664-2022
National Standard of the People's Republic of China
- ICS
- 27.060
- Classification
- F 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted.
1 Scope
This document specifies the evaluation conditions and tests for the classification of oil-fired gas burners with low NOx combustion characteristics according to the NOx emission value. Rules and Evaluation Methods.
This document is applicable to low NOx fuel gas burners, other burners can be implemented by reference.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.
GB/T 11062 Calculation method of calorific value, density, relative density and Wobbe index of natural gas
GB/T 13610 Composition Analysis of Natural Gas - Gas Chromatography
GB 17411 Marine fuel oil
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Combustion efficiency
The actual heat released after the fuel burns as a percentage of the heat released when it is completely burned.
Note: Combustion efficiency is an important indicator to examine the sufficiency of fuel combustion.
3.2 Furnace effective volume
The geometric volume of the space within the boundary of the furnace where fuel combustion and effective radiative heat transfer are carried out.
3.3 Volumetric heat release rate of the furnace
The amount of heat released per unit of effective volume of the furnace in unit time, it is equal to the ratio of the heat input per unit time of the furnace to the effective volume of the furnace.
3.4 Load regulating ratio
The percentage of the average load of the burner to the rated load during the specified time.
3.5 Excess air coefficient
The percentage of air mass actually supplied to burn each kilogram of fuel versus the theoretical air mass required to completely burn each kilogram of fuel.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
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Related Standards
GB 17411-2015 — Marine fuel oils
GB 17411-2026 — Marine fuels
GB/T 11062-2020 — Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition
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GB/T 41664-2022
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