BS EN 14789-2005 固定源排放.氧(O2)体积密度的测定.参照方法.顺磁性.pdf
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1、BRITISH STANDARD BS EN 14789:2005 Stationary source emissions Determination of volume concentration of oxygen (O2) Reference method Paramagnetism The European Standard EN 14789:2005 has the status of a British Standard ICS 13.040.40 BS EN 14789:2005 This British Standard was published under the auth
2、ority of the Standards Policy and Strategy Committee on 16 January 2006 BSI 16 January 2006 ISBN 0 580 46981 6 National foreword This British Standard is the official English language version of EN 14789:2005. The UK participation in its preparation was entrusted by Technical Committee EH/2, Air qua
3、lity, to Subcommittee EH/2/1, Stationary source emissions, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to
4、in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of
5、 a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or prop
6、osals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 39, and a back cover. The BSI copyright notice display
7、ed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments W - - - - - - - - 7 8 7 77 7- - - - 0,30 % volume a The particle filter shall be changed periodically depending on the dust loading at the sampling site and the filter housing s
8、hall be cleaned. Overloading of the particle filter may increase the pressure drop in the sampling line. 10 Expression of results The readings from the analyser are converted to concentrations using the appropriate calibration function and the results are expressed as percentages by volume. Referenc
9、e concentrations of O2 defined in the European directives are: 11 % for incineration of waste in waste incinerators; 10 % for co-incineration of waste in cement kilns; 3 % for combustion of gas or liquid fuels; 6 % for combustion of solid fuels; 15 % for gas turbines. 11 Evaluation of the method in
10、the field The method has been evaluated during six field tests, on waste incineration, co-incineration and large combustion installations. Each test was performed by at least four different measuring teams originating from ten European Union member states. The characteristics of installations, the c
11、onditions during field tests and the values of repeatability and reproducibility in the field are given in Annex D. - EN 14789:2005 (E) 19 12 Equivalence with an alternative method In order to show that an alternative method is equivalent to the reference method, follow the procedures described in t
12、he CEN/TS 14793. The maximum allowable standard deviation of repeatability expressed in mg/m3 for this reference method is: 0,010,0119C rlimit )(C s where C is the concentration in %. The maximum allowable standard deviation of reproducibility expressed in mg/m3 for this reference method is: 0,03460
13、,0103C R )(C s where C is the concentration in %. 13 Test report The test report shall include the following information: a) reference to this European standard; b) description of the purpose of tests; c) information about the personnel involved in the measurement; d) principle of gas sampling and c
14、onditioning; e) information about the analyser and description of the sampling and conditioning line; f) identification of the analyser used, and analysers performance characteristics as listed in Table 1; g) operating range; h) details of the quality and the concentration of the calibration gases u
15、sed; I) details on the adjustment performed before and after actual sampling (at the inlet of the sampling line and at the inlet of the analyser); j) description of plant and process; k) identification of the sampling plane; l) description of the location of the sampling point(s) in the sampling pla
16、ne; m) description of the operating conditions of the plant process; n) changes in the plant operations during sampling, for example burner changes; o) measurement results with sampling date, time and duration; - EN 14789:2005 (E) 20 p) information on flue gas characteristics (temperature, velocity,
17、 moisture, pressure); q) time averaging on relevant periods; r) uncertainty budget established according to EN ISO 14956 or ENV 13005; s) any deviations from this European Standard. - EN 14789:2005 (E) 21 Annex A (informative) Schematic diagram of the measurement system Key 1 Stack 2 Heated filter 3
18、 Heated sample line 4 Sample gas transport line (PTFE) 5 Sample by-pass vent 6 Gas analyser 7 Sample gas manifold 8 Sample pump 9 Conditioning system: configuration 1: condenser with a cooling system configuration 2: permeation drier 10 Calibration gas(es) Figure A.1 - Schematic diagram of the measu
19、rement system - EN 14789:2005 (E) 22 Annex B (informative) Example of assessment of compliance of paramagnetic method for O2 with requirements on emission measurements B.1 Process of uncertainty estimation B.1.1 General This informative Annex gives an example of calculation of uncertainty budget est
20、ablished with configuration 1. The procedure for calculating measurement uncertainty as follows is based on the law of propagation of uncertainty laid down in EN ISO 14956 or ENV 13005. The calculation procedure presents different steps: B.1.2 Determination of model function Define the measurand and
21、 all the parameters that influence the result of the measurement. These parameters, called “input quantities” shall be clearly defined. Identify all sources of uncertainty contributing to any of the input quantities or to the measurand directly. Then the model function, that is to say the relationsh
22、ip between the measurand and the influence quantities, shall be established, if possible in mathematical equation form. B.1.3 Quantification of uncertainty components Each uncertainty source is estimated to obtain its contribution to the overall uncertainty. Use available performance characteristics
23、 of the measurement system, data from the dispersion of repeated measurements, data provided in calibration certificates. Convert all uncertainty components (e.g. performance characteristics) to standard uncertainties of input and influence quantities. B.1.4 Calculation of the combined uncertainty T
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- BS EN 14789-2005 固定源排放.氧O2体积密度的测定.参照方法.顺磁性 14789 2005 固定 排放 O2 体积 密度 测定 参照 方法 顺磁性
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