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BSI PD CEN/TR 1404:2024

BSI PD CEN/TR 1404:2024

$167.15

Test gases. Determination of emissions from appliances burning gaseous fuels during type-testing

Published By Publication Date Number of Pages
BSI 2024 44
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This document covers the measurements of the emissions of carbon monoxide (CO) and nitrogen oxides (NOX) produced by the combustion of gaseous fuel in domestic appliances. It is also possible to adapt it to liquid fuel appliances. It explains how to correct the measured values obtained at the testing conditions of temperature, humidity and gas used into the reference conditions, as well as their conversion to different aeration factor expressed as %O2 in the dry products of combustion. The document also contains information on the types of sampling probes, mainly their form and their dimensions, which depend on the type of flue gas system. It also gives detailed information on the sampling of the flue gas to be analysed, the transport / transfer lines and their components, and the materials recommended for their construction. This document contains hints on the calculation of the uncertainties and the parameters to be considered in the whole analysis chain from the sampling probe to the analysers including the calibration gases. The calculation of the uncertainties of the measurements of NOX and CO is not covered by this document.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
10 3.2 Symbols and abbreviations
4 Parameters impacting the uncertainty of the measurements
4.1 General
4.2 Calculation of individual sources of uncertainties
11 4.3 Total systematic error
4.4 Reproducibility / repeatability of the CO and NOX emissions
4.5 Warming up
13 4.6 Response time
4.7 Setting of zero
14 4.8 Repeatability
15 5 Main performance characteristics of the analysers
5.1 General
5.2 Linearity
16 5.3 Drifts
5.3.1 General
5.3.2 Drift with ambient temperature
17 5.3.3 Drift with ambient pressure
5.3.4 Drift with time
18 5.4 Interferences
5.5 Measuring range
5.6 Converter efficiency (NO2 to NO)
19 6 Calibration gases
6.1 Materials in contact with gases
6.2 Characteristics of the calibration gases
6.3 Accuracy of the calibration gases
6.3.1 General
6.3.2 Uncertainty in concentration of calibration gas
7 Periodical checks
20 8 Sampling line
8.1 Introduction
8.2 General
8.2.1 Sampling flow rate in sampling line
21 8.2.2 Sampling probe
8.2.3 Response time
8.3 Water vapour removable method (dry sampling)
8.3.1 Minimum temperature
8.3.2 Transport (sampling) line
8.3.3 Cooler/condenser or permeation dryer
8.3.4 Filter
8.3.5 Manifold
22 8.3.6 Flow meter / rotameter
8.3.7 Sampling pump
8.4 Wet sampling
9 Testing procedures
9.1 General
9.2 Test room
9.3 Calibration
23 9.4 Sampling
9.4.1 General
9.4.2 Non-flued appliances are excluded from the scope.
9.4.3 Flued appliances (type B appliances)
9.4.4 Balanced flue appliances (type C appliances)
9.4.5 Forced draught burners in relation to the fire tube testing
9.4.6 Test conditions
9.5 Validity of the measurements
9.6 Correction for ambient conditions
9.7 Combustion parameters and conversion coefficients
24 Annex A (informative)Sampling probes for type B appliances
27 Annex B (informative)Sampling probes for type C appliances
30 Annex C (informative)Sampling lines
31 Annex D (informative)NOX and CO: conversions to different units and dilutions
D.1 Introduction
D.2 Definitions related to the combustion products
32 D.3 Other needed parameters
D.4 Conversion to neutral combustion flue gases
D.4.1 General
33 D.4.2 Dry sample line
D.4.3 Wet sampling line
34 D.5 Emission expressed in mg/MJ or g/GJ
D.6 Emission expressed in mg/kWh
D.7 Conversion to X% O2
36 Annex E (informative) NOX and CO: correction ambient
E.1 Conversion to reference conditions
E.1.1 General
E.1.2 Gas boilers
E.1.3 Fuel oil boilers
E.2 Alternative method validated by CETIAT
38 E.3 Influence of gas quality
E.4 Influence of the fuel oil quality (N2 content)
39 Annex F(informative)Combustion parameters and correction coefficients for CO and NOX
42 Annex G(informative)Determination of total CO and NOX uncertainty

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BSI PD CEN/TR 1404:2024
$167.15