Chimneys - Thermal and fluid dynamic calculation methods - Part 1: Chimneys serving one combustion appliance

This European Standard specifies methods for the calculation of the thermal and fluid dynamic characteristics of chimneys serving one heating appliance.
The methods in this part of this European Standard are applicable to negative or positive pressure chimneys with wet or dry operating conditions. It is valid for chimneys with heating appliances for fuels subject to the knowledge of the flue gas characteristics which are needed for the calculation.
The methods in this part of this European Standard are applicable to chimneys with one inlet connected with one appliance. The methods in Part 2 of this European Standard are applicable to chimneys with multiple inlets and one inlet with multiple appliances. Part 3 describes methods for the development of diagrams and tables for chimneys serving one heating appliance.

Abgasanlagen - Wärme- und strömungstechnische Berechnungsverfahren - Teil 1: Abgasanlagen mit einer Verbrennungseinrichtung

Diese Europäische Norm legt wärme- und strömungstechnische Berechnungsverfahren von Abgasanlagen mit einer !Verbrennungseinrichtung" fest.
Diese Europäische Norm gilt sowohl für Unterdruck- als auch für Überdruckanlagen in feuchter und trockener Betriebsweise. Sie gilt für Abgasanlagen von !Verbrennungseinrichtungen" mit Brennstoffen, deren Abgaskennwerte, die für die Berechnung benötigt werden, bekannt sind.
Das Berechnungsverfahren dieser Europäischen Norm gilt für Abgasanlagen mit einem Anschluss für eine Verbrennungseinrichtung. Das Berechnungsverfahren nach Teil 2 dieser Europäischen Norm gilt dagegen für Abgasanlagen mit mehreren Anschlüssen und für einen Anschluss mit mehreren Verbrennungs-einrichtungen. Teil 3 beschreibt Verfahren zur Entwicklung von Diagrammen und Tabellen für Abgasanlagen mit einer !Verbrennungseinrichtung".

Conduits de fumée - Méthodes de calcul thermo-aéraulique - Partie 1: Conduits de fumée ne desservant qu'un seul appareil à combustion

La présente Norme européenne spécifie les méthodes de calcul des caractéristiques thermo-aérauliques des conduits de fumée ne desservant qu'un seul appareil.
Les méthodes données dans la présente partie de cette Norme européenne s'appliquent aux conduits de fumée fonctionnant sous pression négative ou positive, en ambiance humide ou sèche, et desservant des générateurs de chaleur utilisant des combustibles dont les caractéristiques des fumées sont connues pour les calculs.
Les méthodes données dans la présente partie de cette Norme européenne s'appliquent aux conduits de fumée desservant un seul  appareil. Les méthodes données dans la partie 2 de la présente Norme européenne concernent les conduits de fumée desservant plusieurs appareils (conduit collectif ou cascade). La partie 3 décrit des méthodes qui permettent d'élaborer des abaques et des tableaux pour les conduits de fumée desservant un seul générateur de chaleur.

Dimniki - Računske metode termodinamike in dinamike fluidov - 1. del: Dimniki za eno ogrevalno napravo

Ta evropski standard določa računske metode termodinamike in dinamike fluidov v dimnikih za eno ogrevalno napravo.
Metode v tem delu tega evropskega standarda se uporabljajo za dimnike z negativnim ali pozitivnim tlakom v vlažnih ali suhih obratovalnih pogojih. Uporablja se za dimnike z grelnimi napravami na goriva, če poznamo značilnosti dinamike fluidov v dimnikih, ki so potrebne za izračun.
Metode v tem delu tega evropskega standarda se uporabljajo za dimnike z enim dovodom, povezanim z eno ogrevalno napravo. Metode v 2. delu tega evropskega standarda se uporabljajo za dimnike z več dovodi in enim dovodom, povezanim z več ogrevalnimi napravami. 3. del opisuje metode za razvoj diagramov in preglednic za dimnike za eno ogrevalno napravo.

General Information

Status
Published
Publication Date
02-Jul-2019
Current Stage
9000 - Start of review/2 Year Review Enquiry - Review Enquiry
Due Date
01-Apr-2020
Completion Date
01-Apr-2020

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SLOVENSKI STANDARD
SIST EN 13384-1:2015+A1:2019
01-september-2019
Nadomešča:
SIST EN 13384-1:2015
Dimniki - Računske metode termodinamike in dinamike fluidov - 1. del: Dimniki za
eno ogrevalno napravo

Chimneys - Thermal and fluid dynamic calculation methods - Part 1: Chimneys serving

one heating appliance
Abgasanlagen - Wärme- und strömungstechnische Berechnungsverfahren - Teil 1:
Abgasanlagen mit einer Feuerstätte
Conduits de fumée - Méthodes de calcul thermo-aéraulique - Partie 1: Conduits de
fumée ne desservant qu'un seul appareil
Ta slovenski standard je istoveten z: EN 13384-1:2015+A1:2019
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
SIST EN 13384-1:2015+A1:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 13384-1:2015+A1:2019
---------------------- Page: 2 ----------------------
SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2019
EUROPÄISCHE NORM
ICS 91.060.40 Supersedes EN 13384-1:2015
English Version
Chimneys - Thermal and fluid dynamic calculation
methods - Part 1: Chimneys serving one heating appliance

Conduits de fumée - Méthodes de calcul thermo- Abgasanlagen - Wärme- und strömungstechnische

aéraulique - Partie 1: Conduits de fumée ne desservant Berechnungsverfahren - Teil 1: Abgasanlagen mit einer

qu'un seul appareil Feuerstätte

This European Standard was approved by CEN on 24 January 2015 and includes Amendment 1 approved by CEN on 27 April

2019.

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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13384-1:2015+A1:2019 E

worldwide for CEN national Members.
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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 7

4 Symbols and abbreviations ...................................................................................................................... 12

5 Calculation method for non-balanced flue chimneys ..................................................................... 17

5.1 General principles ........................................................................................................................................ 17

5.2 Pressure requirements .............................................................................................................................. 17

5.2.1 Negative pressure chimneys .................................................................................................................... 17

5.2.2 Positive pressure chimneys...................................................................................................................... 18

5.3 Temperature requirement ....................................................................................................................... 19

5.4 Calculation procedure ................................................................................................................................ 19

5.5 Flue gas data characterising the !combustion"appliance .................................................... 20

5.5.1 General ............................................................................................................................................................. 20

5.5.2 !Flue gas mass flow and combustion air mass flow .................................................................... 20

5.5.3 Flue gas temperature .................................................................................................................................. 21

5.5.4 Minimum draught for the !combustion" appliance (PW) for negative pressure

chimney ........................................................................................................................................................... 22

5.5.5 Maximum draught for the !combustion" appliance (P ) for negative
Wmax

pressure chimney ......................................................................................................................................... 23

5.5.6 Maximum differential pressure of the !combustion" appliance (P ) for

positive pressure chimney ........................................................................................................................ 23

5.5.7 Minimum differential pressure of the !combustion" appliance (P ) for
WOmin

positive pressure chimney ........................................................................................................................ 23

5.6 Characteristic data for the calculation ................................................................................................. 23

5.6.1 General ............................................................................................................................................................. 23

5.6.2 Mean value for roughness (r) .................................................................................................................. 23

5.6.3 Thermal resistance (1/Λ) .......................................................................................................................... 23

5.7 Basic values for the calculation ............................................................................................................... 24

5.7.1 Air temperatures .......................................................................................................................................... 24

5.7.2 External air pressure (p ) ......................................................................................................................... 26

5.7.3 Gas constant ................................................................................................................................................... 26

5.7.4 Density of the external air (ρ ) .................................................................................................................... 26

5.7.5 Specific heat capacity of the flue gas (c ) ............................................................................................. 27

5.7.6 Condensing temperature (T ) ................................................................................................................ 27

5.7.7 Correction factor for temperature instability (S ) ........................................................................... 27

5.7.8 Flow safety coefficient (S ) ........................................................................................................................ 27

5.8 Determination of the temperatures ...................................................................................................... 27

5.8.1 General ............................................................................................................................................................. 27

5.8.2 Calculation of the coefficient of cooling (K) ........................................................................................ 28

5.8.3 Coefficient of heat transmission (k ) ..................................................................................................... 28

5.9 Determination of the density of the flue gas and the velocity of the flue gas ......................... 31

5.9.1 Density of the flue gas (ρ ) ....................................................................................................................... 31

5.9.2 Velocity of the flue gas (w ) ..................................................................................................................... 31

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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)

5.10 Determination of the pressures .............................................................................................................. 31

5.10.1 Pressure at the flue gas inlet into the chimney .................................................................................. 31

5.10.2 Theoretical draught available due to chimney effect (P ) ............................................................. 32

5.10.3 Pressure resistance of the chimney (P ) .............................................................................................. 33

5.10.4 Wind velocity pressure (P ) ...................................................................................................................... 34

5.11 Minimum draught required at the flue gas inlet into the chimney and maximum
allowed draught (P and P ) and maximum and minimum differential pressure
Ze Zemax

at the flue gas inlet into the chimney (P and P ) .................................................................. 35

ZOe ZOemin

5.11.1 General ............................................................................................................................................................. 35

5.11.2 Minimum and maximum draught for the !combustion" appliance (P and
P ) and maximum and minimum differential pressure of the !combustion"
Wmax

appliance (P and P ) ........................................................................................................................ 36

WO WOmin

5.11.3 Effective pressure resistance of the connecting flue pipe (P ) ................................................... 36

5.11.4 Pressure resistance of the air supply (P ) ........................................................................................... 37

5.12 Calculation of the inner wall temperature at the chimney outlet (T ) .................................... 38

iob

6 Secondary air for negative pressure chimneys ................................................................................. 40

6.1 General ............................................................................................................................................................. 40

6.2 Calculation method ...................................................................................................................................... 40

6.3 Basic values for the calculation of secondary air .............................................................................. 40

6.3.1 General ............................................................................................................................................................. 40

6.3.2 Mixing calculations ...................................................................................................................................... 40

6.4 Pressures ......................................................................................................................................................... 41

6.4.1 Pressure resistance for the air supply with secondary air (P ) ............................................... 41

BNL

6.4.2 Draught required for the secondary air devices (P ) ..................................................................... 43

6.4.3 Pressure resistance for that part of the connecting flue pipe before the secondary air

device (P ) .................................................................................................................................................... 44

FV1

6.4.4 Pressure requirement with secondary air .......................................................................................... 44

6.5 Temperature requirement with secondary air ................................................................................. 44

7 Calculation method for balanced flue chimneys ............................................................................... 45

7.1 General principles ........................................................................................................................................ 45

7.2 Pressure requirements ............................................................................................................................... 46

7.3 Temperature requirements ...................................................................................................................... 46

7.4 Calculation procedure ................................................................................................................................. 46

7.5 Flue gas data characterizing the !combustion" appliance .................................................. 47

7.6 Characteristic data for the calculation .................................................................................................. 47

7.7 Basic values for the calculation ............................................................................................................... 47

7.7.1 Air temperatures .......................................................................................................................................... 47

7.7.2 Other basic values ........................................................................................................................................ 48

7.8 Determination of the temperatures ....................................................................................................... 48

7.8.1 Non-concentric (separate) ducts............................................................................................................. 48

7.8.2 Concentric ducts – calculation based on a correction factor for heat radiation .................... 49

7.8.3 Concentric ducts – calculation based on calculated heat radiation ........................................... 64

7.8.4 Mean temperatures for pressure calculation ..................................................................................... 68

7.9 Determination of densities and velocities ........................................................................................... 69

7.9.1 Density and velocity of the flue gas ........................................................................................................ 69

7.9.2 Density and velocity of the !combustion" air ........................................................................... 69

7.10 Determination of pressures ...................................................................................................................... 70

7.10.1 Pressure at the flue gas inlet into the chimney .................................................................................. 70

7.10.2 Theoretical draught due to chimney effect in the chimney segment (P ) ............................... 70

7.10.3 Pressure resistance in the chimney segment (P ) ............................................................................ 70

7.10.4 Wind velocity pressure (P ) ...................................................................................................................... 70

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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
7.11 Minimum draught required at the flue gas inlet into the chimney and maximum
allowed draught (P and P ) and maximum and minimum differential pressure
Ze Zemax

at the flue gas inlet into the chimney (P and P ) .................................................................. 71

ZOe ZOemin

7.11.1 General ............................................................................................................................................................. 71

7.11.2 Minimum and maximum draught for the !combustion" appliance (P and
P ) and maximum and minimum differential pressure of the !combustion"
Wmax

appliance (P and P ) ........................................................................................................................ 71

WO WOmin

7.11.3 Effective pressure resistance of the connection pipe (P ) ........................................................... 71

7.11.4 Pressure resistance of the air supply .................................................................................................... 71

7.12 Calculation of the inner wall temperature at the chimney outlet (T ) ................................... 74

iob

8 Consideration of the condensation heat of the flue gas water vapour ..................................... 75

8.1 General ............................................................................................................................................................. 75

8.2 Onset of condensation ................................................................................................................................ 75

8.3 Calculation of the flue gas temperature at the outlet of a chimney segment with

condensation (j ≥ NsegK) ........................................................................................................................... 78

9 Consideration of chimney fans ................................................................................................................ 83

9.1 General ............................................................................................................................................................. 83

9.2 Inline fans ....................................................................................................................................................... 84

9.3 Exhaust fans ................................................................................................................................................... 85

Annex A (informative) Calculation of thermal resistance ............................................................................ 86

Annex B (informative) Tables ................................................................................................................................. 87

Annex C (informative) Chimney outlet with regard to adjacent buildings ........................................... 104

Annex D (informative) Determination of the gas constant R considering the condensation ........ 105

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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
European foreword

This document (EN 13384-1:2015+A1:2019) has been prepared by Technical Committee CEN/TC 166

“Chimneys”, the secretariat of which is held by ASI.

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 January 2020, and conflicting national standards shall

be withdrawn at the latest by January 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.
This document supersedes !EN 13384-1:2015".
This document includes Amendment 1 approved by CEN on 26 June 2019.

According to EN 13384-1:2002+A2:2008 and EN 13384-12015+A1:2019 the following fundamental

changes are given:
— editorial mistakes have been corrected;
— mistakes in formulas have been corrected;

— for wood the rise of the dew point to take into account the acid condensation has been deleted;

— table for material characteristics in Table B.5 has been adapted to EN 15287-1 and supplemented

by radiation coefficients;

— in Calculation of thermal resistance according to Annex A are linked to the method of EN 15287-1

for taking into account the temperature dependence has been added;

— for non-concentric ducts the calculation of the mean temperature of the air supply has been

amended;
— for chimney fans a calculation procedure has been added;
— “heating appliance” replaced by “combustion appliance”;
— New calculation for combustion air mass flow introduced;
— “Supply air” replaced by “combustion air".

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.

The start and finish of text introduced or altered by amendment is indicated in the text by tags !".

This European Standard “Chimneys — Thermal and fluid dynamic calculation methods” consists of

three Parts:
— Part 1: Chimneys serving one combustion appliance
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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
— Part 2: Chimneys serving more than one combustion appliance

— Part 3: Methods for the development of diagrams and tables for chimneys serving one heating

appliance

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
1 Scope

This European Standard specifies methods for the calculation of the thermal and fluid dynamic

characteristics of chimneys serving one !combustion" appliance.

The methods in this part of this European Standard are applicable to negative or positive pressure

chimneys with wet or dry operating conditions. It is valid for chimneys with !combustion"

appliances for fuels subject to the knowledge of the flue gas characteristics which are needed for the

calculation.

The methods in this part of this European Standard are applicable to chimneys with one inlet connected

with one appliance. The methods in Part 2 of this European Standard are applicable to chimneys with

multiple inlets and one inlet with multiple appliances. Part 3 describes methods for the development of

diagrams and tables for chimneys serving one !combustion" appliance.
2 Normative references

!The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies."
EN 1443, Chimneys - General requirements

EN 1856-1, Chimneys - Requirements for metal chimneys - Part 1: System chimney products

EN 1859, Chimneys — Metal chimneys — Test methods

EN 13502, Chimneys - Requirements and test methods for clay/ceramic flue terminals

EN 15287-1:2007+A1:2010, Chimneys - Design, installation and commissioning of chimneys - Part 1:

Chimneys for non-roomsealed heating appliances

prEN 16475-2, Chimneys - Accessories - Part 2: Chimney fans - Requirements and test methods

CEN/TR 1749, European scheme for the classification of gas appliances according to the method of

evacuation of the combustion products (types)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 1443 and the following apply.

!ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp"
3.1
heat output
amount of heat produced by a !combustion"appliance per unit of time
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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
3.1.1
nominal heat output

continuous heat output specified by the manufacturer of the !combustion"appliance related to

specified fuels
3.1.2
heat output range

range of output below the nominal heat output specified by the manufacturer over which the appliance

can be used
3.2
heat input

amount of heat in unit time which is supplied to the !combustion"appliance by the fuel based on its

net caloric value H
3.3
efficiency of the !combustion"appliance
ratio of the heat output (Q) from the appliance to the heat input (Q )
3.4
flue gas mass flow

mass of flue gas leaving the !combustion"appliance through the connecting flue pipe per time unit

3.5
effective height of the chimney

difference in height between the axis of the flue gas inlet into the chimney and the outlet of the chimney

3.6
effective height of the connecting flue pipe

difference in height between the axis of the flue gas chimney outlet of the !combustion"appliance

and the axis of the flue gas inlet into the chimney

Note 1 to entry In the case of open fire chimneys, H is the difference in height between the height of the

upper frame of the furnace and the axis of the flue gas inlet into the chimney.
3.7
draught
positive value of the negative pressure in the flue
3.8
theoretical draught available due to chimney effect

pressure difference caused by the difference in weight between the column of air equal to the effective

height outside a chimney and the column of flue gas equal to the effective height inside the chimney

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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
3.9
pressure resistance of the chimney

pressure which is necessary to overcome the resistance of the flue gas mass flow which exists when

carrying the flue gases through the chimney
3.10
wind velocity pressure
pressure generated on the chimney due to wind
3.11
minimum draught at the flue gas inlet into the chimney

difference between the minimum theoretical draught and the sum of the maximum pressure resistance

of the chimney and the wind velocity pressure
3.12
maximum draught at the flue gas inlet into the chimney
Zmax

difference between the maximum theoretical draught and the minimum pressure resistance in the

chimney
3.13
minimum draught for the !combustion"appliance

difference between the static air pressure of the room of installation of the !combustion"appliance

and the static pressure of the flue gas at the chimney outlet of the appliance which is necessary to

maintain the correct operation of the !combustion"appliance
3.14
maximum draught for the !combustion"appliance
Wmax

difference between the static air pressure of the room of installation of the !combustion"appliance

and the static pressure of the flue gas at the outlet of the appliance which is the maximum allowed to

maintain the correct operation of the !combustion"appliance
3.15
effective pressure resistance of the connecting flue pipe

static pressure difference between the axis of the inlet of the connecting flue pipe and the axis of the

chimney outlet due to the theoretical draught and pressure resistance
3.16
effective pressure resistance of the air supply

difference between the static pressure in the open air and the static air pressure in the room of

installation of the !combustion"appliance at the same height
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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
3.17
minimum draught required at the flue gas inlet into the chimney

sum of the minimum draught required for the !combustion"appliance and the draught required to

overcome the effective pressure resistance of the connecting flue pipe and the effective pressure

resistance of the air supply
3.18
maximum allowed draught at the flue gas inlet into the chimney
Zemax

sum of the maximum draught allowed for the !combustion"appliance and the draught required to

overcome the effective pressure resistance of the connecting flue pipe and the effective pressure

resistance of the air supply
3.19
maximum positive pressure at the flue gas inlet into the chimney
difference of the maximum pressure resistance and th
...

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