EN 14790:2005
(Main)Stationary source emissions - Determination of the water vapour in ducts
Stationary source emissions - Determination of the water vapour in ducts
This European 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 implemented 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 percent of the measured value. This European 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 demonstrate 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 flow 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 percent to 40 percent relative humidity and for water vapour concentration from 29 g/m3 to 250 g/m3 as 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.
(continued)
Emissionen aus stationären Quellen - Bestimmung von Wasserdampf in Leitungen
Diese Europäische Norm beschreibt das Kondensations-/Adsorptionsverfahren einschließlich der Probenahmeeinrichtung zur Bestimmung der Konzentration an Wasserdampf in Abgasen, die aus Abgaskanälen in die Außenluft emittiert werden.
Dieses Verfahren wird europaweit zur Überwachung von Wasserdampf angewandt. Damit es jedoch als Standardreferenzverfahren (SRM) eingesetzt werden kann, muss der Anwender nachweisen, dass die Verfahrenskenngrößen besser sind als die in dieser Europäischen Norm festgelegten Verfahrenskriterien und dass die Gesamtmessunsicherheit des Verfahrens kleiner ist als ± 20 % des Messwertes. Diese Europäische Norm wird eingesetzt als Standardreferenzverfahren für Kontroll- oder andere Zwecke für die periodische Überwachung und für die Kalibrierung oder Überprüfung von automatischen Messeinrichtungen (AMS), die permanent an einem Abgaskamin installiert sind.
Ein Alternativverfahren zu diesem Standardreferenzverfahren darf angewendet werden, wenn der Anwender vor der nationalen Akkreditierungsstelle oder dem Gesetz die Äquivalenz nach der Technischen Spezifikation CEN/TS 14793 nachweisen kann.
Die Bestimmung von Wasserdampf ist hauptsächlich notwendig:
- für Kontrollzwecke, um die Konzentration bei Standardbedingungen anzugeben (bezogen auf trockenes Gas);
- um den Volumenstrom für die isokinetische Probenahme anzupassen, wenn ein Volumenstrommessgerät trockener Bauart verwendet wird.
In beiden Fällen ist die Messgröße der Wassergehalt im gasförmigen Zustand (Dampf), unter Ausschluss von Wassertröpfchen.
Diese Europäische Norm gilt für den Bereich von 4 % bis 40 % relativer Luftfeuchte und für Wasserdampfkonzentrationen im feuchten Abgas von 29 g/m3 bis 250 g/m3; die Obergrenze der Methode hängt vom maximalen Wasserdampfdruck in Luft oder Gas bei der vorliegenden Temperatur ab.
Emissions de sources fixes - Détermination de la vapeur d'eau dans les conduits
Emisije nepremičnih virov - Določevanje vodne pare v odvodnikih
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2005
(PLVLMHQHSUHPLþQLKYLURY'RORþHYDQMHYRGQHSDUHYRGYRGQLNLK
Stationary source emissions - Determination of the water vapour in ducts
Emissionen aus stationären Quellen - Bestimmung von Wasserdampf in Leitungen
Emissions de sources fixes - Détermination de la vapeur d'eau dans les conduits
Ta slovenski standard je istoveten z: EN 14790:2005
ICS:
13.040.40 (PLVLMHQHSUHPLþQLKYLURY Stationary source emissions
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 14790
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2005
ICS 11.040.40
English Version
Stationary source emissions - Determination of the water vapour
in ducts
Emissions de sources fixes - Détermination de la vapeur Emissionen aus stationären Quellen - Bestimmung von
d'eau dans les conduits Wasserdampf in Leitungen
This 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 European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards 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 translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14790:2005: E
worldwide for CEN national Members.
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 housing.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 Barometer.12
5.10 Balance.12
5.11 Temperature measurement.12
6 Measurement procedure.12
6.1 General requirements.12
6.2 Preparation and installation of equipment.12
6.2.1 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 sampling.14
6.4.1 Introduction of the probe in the duct.14
6.4.2 Sampling.14
6.5 Repeatability of the weighing.14
6.6 Procedure for gas streams saturated with water (droplets present) .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 budget.16
7.4 Equivalency with an alternative method .17
8 Evaluation of the 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 P
std
= 101,325 kPa.21
Annex B (informative) Type of sampling equipments .25
Annex C (informative) Example of assessment of compliance of reference method for water
vapour with requirements on emission measurements.26
C.1 General.26
C.2 Process of uncertainty estimation.26
C.2.1 Determination of the model equation.26
C.2.2 Quantification of uncertainty components .26
C.2.3 Calculation of the combined uncertainty.26
C.3 Specific conditions in the field .27
C.4 Performance characteristics of the method .28
C.5 Calculation of standard uncertainty of 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 calculations.33
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 Characteristics of installations.37
D.3 Repeatability and reproducibility in the field.38
D.3.1 Repeatability.39
D.3.2 Reproducibility.40
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive.41
Bibliography.42
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 DIN.
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 mandate 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 Regulations, 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, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
1 Scope
This European 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 implemented 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 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 demonstrate 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 flow 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 % relative humidity and for water vapour
3 3
concentration from 29 g/m to 250 g/m as 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 Eu
...
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