1、BRITISH STANDARDBS EN 14790:2005Stationary source emissions Determination of the water vapour in ductsThe European Standard EN 14790:2005 has the status of a British StandardICS 11.040.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g
2、55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 14790:2005This British Standard was p
3、ublished under the authority of the Standards Policy and Strategy Committee on 16 January 2006 BSI 16 January 2006ISBN 0 580 46977 8National forewordThis British Standard is the official English language version of EN 14790:2005.EH/2, Air quality, to Subcommittee EH/2/1, Stationary source emissions,
4、 which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate the
5、m in the UK.A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “Int
6、ernational 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 a contract. Users are responsible for its correct application. Compliance with a B
7、ritish Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 42, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the docum
8、ent was last issued.Amendments issued since publicationAmd. No. Date CommentsThe UK participation in its preparation was entrusted by Technical Committee Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted witho
9、ut license from IHS-,-,-EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14790November 2005ICS 11.040.40English VersionStationary source emissions - Determination of the water vapourin ductsEmissions de sources fixes - Dtermination de la vapeurdeau dans les conduitsEmissionen aus stationren Quellen
10、 - Bestimmung vonWasserdampf in LeitungenThis European Standard was approved by CEN on 30 September 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration.
11、 Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationund
12、er the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Icela
13、nd, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B
14、-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14790:2005: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without lic
15、ense from IHS-,-,-EN 14790:2005 (E) 2 Contents Page Foreword 4 1 Scope .5 2 Normative references .5 3 Terms and definitions.6 4 Principle.9 4.1 General 9 4.2 Adsorption or condensation/adsorption method .9 4.3 Temperature method 9 5 Apparatus 10 5.1 General 10 5.2 Sampling probe.10 5.3 Filter housin
16、g 10 5.4 Particle filter 11 5.5 Trapping unit .11 5.6 Cooling System (optional)11 5.7 Sampling pump .11 5.8 Gas volume meter.11 5.9 Barometer12 5.10 Balance 12 5.11 Temperature measurement 12 6 Measurement procedure 12 6.1 General requirements .12 6.2 Preparation and installation of equipment12 6.2.
17、1 Sampling location .12 6.2.2 Sampling point 13 6.2.3 Assembling the equipment 13 6.3 Leak test 13 6.4 Performing of the sampling14 6.4.1 Introduction of the probe in the duct.14 6.4.2 Sampling14 6.5 Repeatability of the weighing.14 6.6 Procedure for gas streams saturated with water (droplets presen
18、t) 15 7 Determination of the characteristics of the method: sampling and analysis.15 7.1 Introduction.15 7.2 Relevant performance characteristics of the method and performance criteria .15 7.3 Establishment of the uncertainty budget16 7.4 Equivalency with an alternative method .17 8 Evaluation of th
19、e method in the field.17 9 Water vapour determination.18 10 Report 20 Annex A (normative) Determination of water vapour concentration for water saturated gas, at Pstd= 101,325 kPa.21 Annex B (informative) Type of sampling equipments .25 Annex C (informative) Example of assessment of compliance of re
20、ference method for water vapour with requirements on emission measurements.26 C.1 General 26 C.2 Process of uncertainty estimation.26 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-
21、,-,-EN 14790:2005 (E) 3 C.2.1 Determination of the model equation26 C.2.2 Quantification of uncertainty components .26 C.2.3 Calculation of the combined uncertainty26 C.3 Specific conditions in the field 27 C.4 Performance characteristics of the method .28 C.5 Calculation of standard uncertainty of
22、the concentration .28 C.5.1 Model equation and application of the rule of the uncertainty propagation 29 C.5.2 Results of standard uncertainties calculations33 C.5.3 Estimation of the combined uncertainty.36 Annex D (informative) Evaluation of the method in the field 37 D.1 General 37 D.2 Characteri
23、stics of installations37 D.3 Repeatability and reproducibility in the field38 D.3.1 Repeatability39 D.3.2 Reproducibility40 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive.41 Bibliography.42 Copyright European Committee for Standardiz
24、ation Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 14790:2005 (E) 4 Foreword This European Standard (EN 14790:2005) has been prepared by Technical Committee CEN/TC 264 “Air qualilty”, the secretariat of which is held by D
25、IN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2006, and conflicting national standards shall be withdrawn at the latest by May 2006. This European Standard has been prepared under a mand
26、ate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this European Standard. According to the CEN/CENELEC Internal Reg
27、ulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
28、Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 14790:2005 (E) 5 1 Scope This Euro
29、pean Standard describes the condensation/adsorption technique, including the sampling system, to determine the water vapour concentration in the flue gases emitting to atmosphere from ducts and stacks. This technique is usually used all over Europe for water vapour monitoring. However to be implemen
30、ted as the Standard Reference Method (SRM), the user has to demonstrate that the performance characteristics of the method are better than the performance criteria defined in this European Standard and that the overall uncertainty of the method is less than 20 % of the measured value. This European
31、Standard as the Standard Reference Method (SRM) is used for periodic monitoring and for calibration or control of Automatic Measuring Systems (AMS) permanently installed on a stack, for regulatory purposes or other purposes. An Alternative Method to this SRM may be used provided that the user can de
32、monstrate equivalence according to the Technical Specification CEN/TS 14793, to the satisfaction of his national accreditation body or law. The determination of water vapour is mainly necessary for: regulatory purposes, to express the concentration at standard conditions (on dry gas); adjust the flo
33、w rate for isokinetic sampling, when a dry gas flow rate metering device is used. For both applications, the quantity to be measured is the amount of water present in the gas phase (vapour), which does not include water droplets. This European Standard is applicable in the range from 4 % to 40 % rel
34、ative humidity and for water vapour concentration from 29 g/m3to 250 g/m3as a wet gas, although for a given temperature the upper limit of the method is related to the maximum pressure of water in air or in the gas. This European Standard has been evaluated during field tests on waste incineration,
35、co-incineration and large combustion installations. It has been validated for sampling periods of 30 min in the concentration range of 7 % to 26 % volume. In this European Standard all the concentrations are expressed in normal conditions (273 K and 101,3 kPa). NOTE For saturated conditions the cond
36、ensation/adsorption method is not applicable. Some guidance is given in this European Standard to deal with flue gas when droplets are present. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the ed
37、ition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ENV 13005, Guide to the expression of uncertainly in measurement. CEN/TS 14793, Stationary source emission - Intralaboratory validation procedure for an alternative method c
38、ompared to a reference method. EN ISO 14956, Air Quality Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertainty (ISO 14956:2002). Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproducti
39、on or networking permitted without license from IHS-,-,-EN 14790:2005 (E) 6 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 absorber device in which water vapour is absorbed 3.2 detection limit (LD) concentration value of the measura
40、nd below which there is at least 95 % level of confidence that the measured value corresponds to a sample free of that measurand 3.3 dew point temperature below which the condensation of water vapour begins at the given pressure condition of the flue gas 3.4 droplets small liquid particles of conden
41、sed water vapour or water liquid in the flue gas (e.g. coming from a scrubber) NOTE In adiabatic equilibrium conditions, droplets could arise only if a gas stream is saturated with water. 3.5 measurand particular quantity subject to measurement VIM 2.6 3.6 measuring series several successive measure
42、ments carried out at the same sampling plane and with the same process operating conditions EN 13284-1 3.7 repeatability in the laboratory closeness of the agreement between the results of successive measurements of the same measurand carried out under the same conditions of measurement NOTE 1 Repea
43、tability conditions include: same measurement procedure; same laboratory; same sampling equipment, used under the same conditions; same location; repetition over a short period of time. NOTE 2 Repeatability may be expressed quantitatively in terms of the dispersion characteristics of the results. In
44、 this European Standard the repeatability is expressed as a value with a level of confidence of 95 %. VIM 3.6 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN 14790:2005 (E) 7
45、3.8 repeatability in the field closeness of the agreement between the results of simultaneous measurements of the same measurand carried out with two equipments under the same conditions of measurement NOTE 1 These conditions include: same measurement procedure; two equipments, the performances of w
46、hich are fulfilling the requirements of the reference method, used under the same conditions; same location; implemented by the same laboratory; typically calculated on short periods of time in order to avoid the effect of changes of influence parameters (e.g. 30 min). NOTE 2 Repeatability may be ex
47、pressed quantitatively in terms of the dispersion characteristics of the results. In this European Standard the repeatability under field conditions is expressed as a value with a level of confidence of 95 %. 3.9 reproducibility in the field closeness of the agreement between the results of simultan
48、eous measurements of the same measurand carried out with several equipments under the same conditions of measurement NOTE 1 These conditions include: same measurement procedure; several equipments, the performances of which are fulfilling the requirements of the reference method, used under the same
49、 conditions; same location; implemented by several laboratories. NOTE 2 Reproducibility may be expressed quantitatively in terms of the dispersion characteristics of the results. In this European Standard the reproducibility under field conditions is expressed as a value with a level of confidence of 95 %.
