SIST EN 13384-1:2015
(Main)Chimneys - Thermal and fluid dynamic calculation methods - Part 1: Chimneys serving one heating appliance
Chimneys - Thermal and fluid dynamic calculation methods - Part 1: Chimneys serving one heating appliance
This European Standard specifies methods for the calculation of the thermal and fluid dynamic characteristics of chimneys serving one 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 Feuerstätte
Diese Norm legt wärme- und strömungstechnische Berechnungsverfahren von Abgasanlagen mit einer Feuerstätte fest.
Diese Norm gilt sowohl für Unterdruck- als auch für Überdruckanlagen in feuchter und trockener Betriebsweise. Sie gilt für Abgasanlagen von Feuerstätten mit Brennstoffen, deren Abgaskennwerte, die für die Berechnung benötigt werden, bekannt sind.
Das Berechnungsverfahren dieser Norm gilt für Abgasanlagen mit einem Anschluss für eine Feuerstätte. Das Berechnungsverfahren nach Teil 2 dieser Europäischen Norm gilt dagegen für Abgasanlagen mit mehreren Anschlüssen und für einen Anschluss mit mehreren Feuerstätten. Teil 3 beschreibt Verfahren zur Entwicklung von Diagrammen und Tabellen für Abgasanlagen mit einer Feuerstätte.
Conduits de fumée - Méthodes de calcul thermo-aéraulique - Partie 1: Conduits de fumée ne desservant qu'un seul appareil
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
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 13384-1:2015
01-junij-2015
1DGRPHãþD
SIST EN 13384-1:2003+A2:2008
'LPQLNL5DþXQVNHPHWRGHWHUPRGLQDPLNHLQGLQDPLNHIOXLGRYGHO 'LPQLNL]D
HQRRJUHYDOQRQDSUDYR
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
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
SIST EN 13384-1:2015 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
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SIST EN 13384-1:2015
EUROPEAN STANDARD
EN 13384-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 91.060.40 Supersedes EN 13384-1:2002+A2:2008
English Version
Chimneys - Thermal and fluid dynamic calculation methods -
Part 1: Chimneys serving one heating appliance
Conduits de fumée - Méthodes de calcul thermo-aéraulique Abgasanlagen - Wärme- und strömungstechnische
- Partie 1: Conduits de fumée ne desservant qu'un seul Berechnungsverfahren - Teil 1: Abgasanlagen mit einer
appareil Feuerstätte
This European Standard was approved by CEN on 24 January 2015.
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, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13384-1:2015 E
worldwide for CEN national Members.
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SIST EN 13384-1:2015
EN 13384-1:2015 (E)
Contents Page
Foreword .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 Symbols and abbreviations . 10
5 Calculation method for non-balanced flue chimneys . 14
5.1 General principles. 14
5.2 Pressure requirements . 15
5.2.1 Negative pressure chimneys . 15
5.2.2 Positive pressure chimneys . 16
5.3 Temperature requirement . 16
5.4 Calculation procedure . 17
5.5 Flue gas data characterising the heating appliance . 18
5.5.1 General . 18
5.5.2 Flue gas mass flow . 18
5.5.3 Flue gas temperature . 19
5.5.4 Minimum draught for the heating appliance (P ) for negative pressure chimney . 19
W
5.5.5 Maximum draught for the heating appliance (P ) for negative pressure chimney . 20
Wmax
5.5.6 Maximum differential pressure of the heating appliance (P ) for positive pressure
WO
chimney . 20
5.5.7 Minimum differential pressure of the heating appliance (P ) for positive pressure
WOmin
chimney . 20
5.6 Characteristic data for the calculation . 20
5.6.1 General . 20
5.6.2 Mean value for roughness (r) . 20
5.6.3 Thermal resistance (1/Λ) . 20
5.7 Basic values for the calculation . 21
5.7.1 Air temperatures . 21
5.7.2 External air pressure (p ) . 23
L
5.7.3 Gas constant . 23
5.7.4 Density of the external air (ρ ) . 24
L
5.7.5 Specific heat capacity of the flue gas (c ) . 24
p
5.7.6 Condensing temperature (T ) . 24
sp
5.7.7 Correction factor for temperature instability (S ) . 24
H
5.7.8 Flow safety coefficient (S ) . 24
E
5.8 Determination of the temperatures . 25
5.8.1 General . 25
5.8.2 Calculation of the coefficient of cooling (K) . 25
5.8.3 Coefficient of heat transmission (k ) . 26
b
5.9 Determination of the density of the flue gas and the velocity of the flue gas . 28
5.9.1 Density of the flue gas (ρ ) . 28
m
5.9.2 Velocity of the flue gas (w ) . 28
m
5.10 Determination of the pressures . 29
5.10.1 Pressure at the flue gas inlet into the chimney . 29
5.10.2 Theoretical draught available due to chimney effect (P ) . 30
H
5.10.3 Pressure resistance of the chimney (P ) . 30
R
5.10.4 Wind velocity pressure (P ) . 31
L
2
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SIST EN 13384-1:2015
EN 13384-1:2015 (E)
5.11 Minimum draught required at the flue gas inlet into the chimney and maximum allowed
and P ) and maximum and minimum differential pressure at the flue gas
draught (P
Ze Zemax
and P ) . 32
inlet into the chimney (P
ZOe ZOemin
5.11.1 General . 32
5.11.2 Minimum and maximum draught for the heating appliance (P and P ) and maximum
W Wmax
and P ) . 33
and minimum differential pressure of the heating appliance (P
WO WOmin
5.11.3 Effective pressure resistance of the connecting flue pipe (P ) . 33
FV
5.11.4 Pressure resistance of the air supply (P ) . 34
B
5.12 Calculation of the inner wall temperature at the chimney outlet (T ) . 35
iob
6 Secondary air for negative pressure chimneys . 37
6.1 General . 37
6.2 Calculation method . 37
6.3 Basic values for the calculation of secondary air . 37
6.3.1 General . 37
6.3.2 Mixing calculations . 37
6.4 Pressures . 38
6.4.1 Pressure resistance for the air supply with secondary air (P ) . 38
BNL
6.4.2 Draught required for the secondary air devices (P ) . 39
NL
6.4.3 Pressure resistance for that part of the connecting flue pipe before the secondary air
) . 40
device (P
FV1
6.4.4 Pressure requirement with secondary air . 41
6.5 Temperature requirement with secondary air . 41
7 Calculation method for balanced flue chimneys . 41
7.1 General principles . 41
7.2 Pressure requirements . 42
7.3 Temperature requirements . 43
7.4 Calculation procedure . 43
7.5 Flue gas data characterizing the heating appliance . 43
7.6 Characteristic data for the calculation . 44
7.7 Basic values for the calculation . 44
7.7.1 Air temperatures . 44
7.7.2 Other basic values . 45
7.8 Determination of the temperatures . 45
7.8.1 Non-concentric (separate) ducts . 45
7.8.2 Concentric ducts – calculation based on a correction factor for heat radiation . 45
7.8.3 Concentric ducts – calculation based on calculated heat radiation . 60
7.8.4 Mean temperatures for pressure calculation. 64
7.9 Determination of densities and velocities . 65
7.9.1 Density and velocity of the flue gas . 65
7.9.2 Density and velocity of the supply air . 65
7.10 Determination of pressures . 66
7.10.1 Pressure at the flue gas inlet into the chimney . 66
7.10.2 Theoretical draught due to chimney effect in the chimney segment (P ) . 66
H
7.10.3 Pressure resistance in the chimney segment (P ) . 66
R
7.10.4 Wind velocity pressure (P ) . 66
L
7.11 Minimum draught required at the flue gas inlet into the chimney and maximum allowed
and P ) and maximum and minimum differential pressure at the flue gas
draught (P
Ze Zemax
and P ) . 66
inlet into the chimney (P
ZOe ZOemin
7.11.1 General . 66
7.11.2 Minimum and maximum draught for the heating appliance (P and P ) and maximum
W Wmax
and P ) . 67
and minimum differential pressure of the heating appliance (P
WO WOmin
7.11.3 Effective pressure resistance of the connection pipe (P ) . 67
FV
7.11.4 Pressure resistance of the air supply . 67
7.12 Calculation of the inner wall temperature at the chimney outlet (T ) . 70
iob
8 Consideration of the condensation heat of the flue gas water vapour . 70
3
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SIST EN 13384-1:2015
EN 13384-1:2015 (E)
8.1 General . 70
8.2 Onset of condensation . 71
8.3 Calculation of the flue gas temperature at the outlet of a chimney segment with
condensation (j ≥ NsegK) . 73
9 Consideration of chimney fans . 78
9.1 General . 78
9.2 Inline fans . 79
9.3 Exhaust fans . 80
Annex A (informative) Calculation of thermal resistance . 82
Annex B (informative) Tables . 83
Annex C (informative) Chimney outlet with regard to adjacent buildings . 98
Annex D (informative) Determination of the gas constant R considering the condensation . 99
4
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SIST EN 13384-1:2015
EN 13384-1:2015 (E)
Foreword
This document (EN 13384-1:2015) 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 October 2015, and conflicting national standards shall be withdrawn at
the latest by October 2015.
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 13384-1:2002+A2:2008.
According to EN 13384-1:2002+A2:2008 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;
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
This European Standard “Chimneys — Thermal and fluid dynamic calculation methods” consists of three
Parts:
— Part 1: Chimneys serving one heating appliance
— Part 2: Chimneys serving more than one heating 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
5
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SIST EN 13384-1:2015
EN 13384-1:2015 (E)
1 Scope
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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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.
3.1
heat output
Q
amount of heat produced by a heating appliance per unit of time
3.1.1
nominal heat output
Q
N
continuous heat output specified by the manufacturer of the heating appliance related to specified fuels
6
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SIST EN 13384-1:2015
EN 13384-1:2015 (E)
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
Q
F
amount of heat in unit time which is supplied to the heating appliance by the fuel based on its net caloric value
H
u
3.3
efficiency of the heating appliance
η
W
ratio of the heat output (Q) from the appliance to the heat input (Q )
F
3.4
flue gas mass flow
m
mass of flue gas leaving the heating appliance through the connecting flue pipe per time unit
3.5
effective height of the chimney
H
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
H
V
difference in height between the axis of the flue gas chimney outlet of the heating 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
V
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
P
H
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
3.9
pressure resistance of the chimney
P
R
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
P
L
pressure generated on the chimney due to wind
7
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SIST EN 13384-1:2015
EN 13384-1:2015 (E)
3.11
minimum draught at the flue gas inlet into the chimney
P
Z
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
P
Zmax
difference between the maximum theoretical draught and the minimum pressure resistance in the chimney
3.13
minimum draught for the heating appliance
P
W
difference between the static air pressure of the room of installation of the heating 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 heating appliance
3.14
maximum draught for the heating appliance
P
Wmax
difference between the static air pressure of the room of installation of the heating 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 heating appliance
3.15
effective pressure resistance of the connecting flue pipe
P
FV
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
P
B
difference between the static pressure in the open air and the static air pressure in the room of installation of
the heating appliance at the same height
3.17
minimum draught required at the flue gas inlet into the chimney
P
Ze
sum of the minimum draught required for the heating 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
P
Zemax
sum of the maximum draught allowed for the heating 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
P
ZO
difference of the maximum pressure resistance and the minimum theoretical draught of the chimney added by
the wind velocity pressure
8
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SIST EN 13384-1:2015
EN 13384-1:2015 (E)
3.20
minimum positive pressure at the flue gas inlet into the chimney
P
ZOmin
difference of the minimum pressure resistance and the maximum theoretical draught of the chimney
3.21
maximum differential pressure of the heating appliance
P
WO
maximum difference between the static pressure of the flue gas at the chimney outlet of the appliance and the
static pressure of the air at the inlet to the heating appliance specified for its correct operation
3.22
minimum differential pressure of the heating appliance
P
WOmin
minimum difference between the static pressure of the flue gas at the outlet of the appliance and the static
pressure of the air at the inlet to the heating appliance specified for its correct operation. This can be a
negative value.
3.23
maximum differential pressure at the flue gas inlet into the chimney
P
ZOe
difference between the maximum differential pressure of the heating appliance and the sum of the effective
pressure resistance of the connecting flue pipe and the effective pressure resistance of the air supply
3.24
secondary air
ambient air added to the flue gas in addition to the nominal flue gas mass flow
3.25
minimum differential pressure at the flue gas inlet into the chimney
P
ZOemin
difference between the minimum differential pressure of the heating appliance and the sum of the effective
pressure resistance of the connecting flue pipe and the effective pressure resistance of the air supply
3.26
secondary air device
draught regulator or a draught diverter
3.27
draught regulator
component which automatically supplies ambient air to the chimney, the connecting flue pipe or the heating
appliance
3.28
draught diverter
device, placed in the combustion products passage of the he
...
SLOVENSKI STANDARD
oSIST prEN 13384-1:2013
01-september-2013
'LPQLNL5DþXQVNHPHWRGHWHUPRGLQDPLNHLQGLQDPLNHIOXLGRYGHO 'LPQLNL]D
HQRRJUHYDOQRQDSUDYR
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: prEN 13384-1 rev
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
oSIST prEN 13384-1:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 13384-1:2013
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oSIST prEN 13384-1:2013
EUROPEAN STANDARD
DRAFT
prEN 13384-1 rev
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2013
ICS 91.060.40 Will supersede EN 13384-1:2002+A2:2008
English Version
Chimneys - Thermal and fluid dynamic calculation methods -
Part 1: Chimneys serving one heating appliance
Conduits de fumée - Méthodes de calcul thermo-aéraulique Abgasanlagen - Wärme- und strömungstechnische
- Partie 1: Conduits de fumée ne desservant qu'un seul Berechnungsverfahren - Teil 1: Abgasanlagen mit einer
appareil Feuerstätte
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 166.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13384-1 rev:2013: E
worldwide for CEN national Members.
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oSIST prEN 13384-1:2013
prEN 13384-1:2013 (E)
Contents Page
Foreword .5
1 Scope .5
2 Normative references .6
3 Terms and definitions .6
4 Symbols and abbreviations . 10
5 Calculation method for non-balanced flue chimneys . 12
5.1 General principles. 12
5.2 Pressure requirements . 13
5.2.1 Negative pressure chimneys . 13
5.2.2 Positive pressure chimneys . 14
5.3 Temperature requirement . 15
5.4 Calculation procedure . 15
5.5 Flue gas data characterising the heating appliance . 16
5.5.1 General . 16
5.5.2 Flue gas mass flow . 16
5.5.3 Flue gas temperature . 17
5.5.4 Minimum draught for the heating appliance (P ) for negative pressure chimney . 18
W
5.5.5 Maximum draught for the heating appliance (P ) for negative pressure chimney . 18
Wmax
5.5.6 Maximum differential pressure of the heating appliance (P ) for positive pressure
WO
chimney . 18
5.5.7 Minimum differential pressure of the heating appliance (P ) for positive pressure
WOmin
chimney . 18
5.6 Characteristic data for the calculation . 19
5.6.1 General . 19
5.6.2 Mean value for roughness (r) . 19
5.6.3 Thermal resistance (1/Λ) . 19
5.7 Basic values for the calculation . 19
5.7.1 Air temperatures . 19
5.7.2 External air pressure (p ) . 21
L
5.7.3 Gas constant . 22
5.7.4 Density of the external air (ρ ) . 22
L
5.7.5 Specific heat capacity of the flue gas (c ) . 22
p
5.7.6 Condensing temperature (T ) . 22
sp
5.7.7 Correction factor for temperature instability (S ) . 23
H
5.7.8 Flow safety coefficient (S ) . 23
E
5.8 Determination of the temperatures . 23
5.8.1 General . 23
5.8.2 Calculation of the coefficient of cooling (K) . 24
5.8.3 Coefficient of heat transmission (k ) . 24
b
5.9 Determination of the density of the flue gas and the velocity of the flue gas . 27
5.9.1 Density of the flue gas (ρ ) . 27
m
5.9.2 Velocity of the flue gas (w ) . 27
m
5.10 Determination of the pressures . 27
5.10.1 Pressure at the flue gas inlet into the chimney . 27
5.10.2 Theoretical draught available due to chimney effect (P ) . 29
H
5.10.3 Pressure resistance of the chimney (P ) . 29
R
5.10.4 Wind velocity pressure (P ) . 31
L
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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 at the flue gas
Ze Zemax
inlet into the chimney (P and P ) . 31
ZOe ZOemin
5.11.1 General . 31
5.11.2 Minimum and maximum draught for the heating appliance (P and P ) and maximum
W Wmax
and minimum differential pressure of the heating appliance (P and P ) . 32
WO WOmin
5.11.3 Effective pressure resistance of the connecting flue pipe (P ) . 32
FV
5.11.4 Pressure resistance of the air supply (P ) . 34
B
5.12 Calculation of the inner wall temperature at the chimney outlet (T ) . 35
iob
6 Secondary air for negative pressure chimneys . 36
6.1 General . 36
6.2 Calculation method . 37
6.3 Basic values for the calculation of secondary air . 37
6.3.1 General . 37
6.3.2 Mixing calculations . 37
6.4 Pressures . 38
6.4.1 Pressure resistance for the air supply with secondary air (P ) . 38
BNL
6.4.2 Draught required for the secondary air devices (P ) . 39
NL
6.4.3 Pressure resistance for that part of the connecting flue pipe before the secondary air
device (P ) . 40
FV1
6.4.4 Pressure requirement with secondary air . 41
6.5 Temperature requirement with secondary air . 41
7 Calculation method for balanced flue chimneys . 41
7.1 General principles . 41
7.2 Pressure requirements . 42
7.3 Temperature requirements . 43
7.4 Calculation procedure . 43
7.5 Flue gas data characterizing the heating appliance . 44
7.6 Characteristic data for the calculation . 44
7.7 Basic values for the calculation . 44
7.7.1 Air temperatures . 44
7.7.2 Other basic values . 45
7.8 Determination of the temperatures . 45
7.8.1 Non-concentric (separate) ducts . 45
7.8.2 Concentric ducts – calculation based on a correction factor for heat radiation . 46
7.8.3 Concentric ducts – calculation based on calculated heat radiation . 62
7.8.4 Mean temperatures for pressure calculation. 66
7.9 Determination of densities and velocities . 67
7.9.1 Density and velocity of the flue gas . 67
7.9.2 Density and velocity of the supply air . 67
7.10 Determination of pressures . 68
7.10.1 Pressure at the flue gas inlet into the chimney . 68
7.10.2 Theoretical draught due to chimney effect in the chimney segment (P ) . 68
H
7.10.3 Pressure resistance in the chimney segment (P ) . 68
R
7.10.4 Wind velocity pressure (P ) . 68
L
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 at the flue gas
Ze Zemax
inlet into the chimney (P and P ) . 68
ZOe ZOemin
7.11.1 General . 68
7.11.2 Minimum and maximum draught for the heating appliance (P and P ) and maximum
W Wmax
and minimum differential pressure of the heating appliance (P and P ) . 69
WO WOmin
7.11.3 Effective pressure resistance of the connection pipe (P ) . 69
FV
7.11.4 Pressure resistance of the air supply . 69
7.12 Calculation of the inner wall temperature at the chimney outlet (T ) . 72
iob
8 Consideration of the condensation heat of the flue gas water vapour . 73
8.1 General . 73
8.2 Onset of condensation . 73
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8.3 Calculation of the flue gas temperature at the outlet of a chimney segment with
condensation (j ≥ NsegK) . 76
Annex A (informative) Calculation of thermal resistance . 83
Annex B (informative) Tables . 84
Annex C (informative) Chimney outlet with regard to adjacent buildings . 97
Annex D (informative) Limit curves of the classification for the draught regulator . 98
Annex E (informative) Determination of the gas constant R considering the condensation . 99
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Foreword
This document (prEN 13384-1:2013) has been prepared by Technical Committee CEN/TC 166 “Chimneys”,
the secretariat of which is held by ON.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13384-1:2002+A2:2008.
According to EN 13384-1:2002 + A2:2008 the following fundamental changes are given:
editorial mistakes have been corrected;
mistakes in equations 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 annex B5 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;
This European Standard “Chimneys — Thermal and fluid dynamic calculation methods” consists of three
Parts:
Part 1: Chimneys serving one heating appliance
Part 2: Chimneys with multiple inlets and one inlet with multiple appliances
Part 3: Methods for the development of diagrams and tables for chimneys serving one heating appliance
1 Scope
This European Standard specifies methods for the calculation of the thermal and fluid dynamic characteristics
of chimneys serving one 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.
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2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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
CEN/TR 1749, European scheme for the classification of gas appliances according to the method of
evacuation of the combustion products (types) part.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1443 and the following apply.
3.1
heat output (Q)
amount of heat produced by a heating appliance per unit of time
3.1.1
nominal heat output (Q )
N
continuous heat output specified by the manufacturer of the heating 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 (Q )
F
amount of heat in unit time which is supplied to the heating appliance by the fuel based on its net caloric value H
u
3.3
efficiency of the heating appliance (η )
W
ratio of the heat output (Q) from the appliance to the heat input (Q )
F
3.4
flue gas mass flow ( )
m
mass of flue gas leaving the heating appliance through the connecting flue pipe per time unit
3.5
effective height of the chimney (H)
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 (H )
V
difference in height between the axis of the flue gas chimney outlet of the heating appliance and the axis of the
flue gas inlet into the chimney
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In the case of open fire chimneys, H is the difference in height between the height of the upper frame of the
V
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 (P )
H
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
3.9
pressure resistance of the chimney (P )
R
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 (P )
L
pressure generated on the chimney due to wind
3.11
minimum draught at the flue gas inlet into the chimney (P )
Z
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 (P )
Zmax
difference between the maximum theoretical draught and the minimum pressure resistance in the chimney
3.13
minimum draught for the heating appliance (P )
W
difference between the static air pressure of the room of installation of the heating 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 heating appliance
3.14
maximum draught for the heating appliance (P )
Wmax
difference between the static air pressure of the room of installation of the heating 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 heating appliance
3.15
effective pressure resistance of the connecting flue pipe (P )
FV
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 (PB)
difference between the static pressure in the open air and the static air pressure in the room of installation of the
heating appliance at the same height
3.17
minimum draught required at the flue gas inlet into the chimney (P )
Ze
sum of the minimum draught required for the heating 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
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3.18
maximum allowed draught at the flue gas inlet into the chimney (P )
Zemax
sum of the maximum draught allowed for the heating 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 (P )
ZO
difference of the maximum pressure resistance and the minimum theoretical draught of the chimney added by
the wind velocity pressure
3.20
minimum positive pressure at the flue gas inlet into the chimney (P )
ZOmin
difference of the minimum pressure resistance and the maximum theoretical draught of the chimney
3.21
maximum differential pressure of the heating appliance (P )
WO
maximum difference between the static pressure of the flue gas at the chimney outlet of the appliance and the
static pressure of the air at the inlet to the heating appliance specified for its correct operation
3.22
minimum differential pressure of the heating appliance (P )
WOmin
minimum difference between the static pressure of the flue gas at the outlet of the appliance and the static
pressure of the air at the inlet to the heating appliance specified for its correct operation. This can be a negative
value.
3.23
maximum differential pressure at the flue gas inlet into the chimney (P )
ZOe
difference between the maximum differential pressure of the heating appliance and the sum of the effective
pressure resistance of the connecting flue pipe and the effective pressure resistance of the air supply
3.24
secondary air
ambient air added to the flue gas in addition to the nominal flue gas mass flow
3.25
minimum differential pressure at the flue gas inlet into the chimney (P )
ZOemin
difference between the minimum differential pressure of the heating appliance and the sum of the effective
pressure resistance of the connecting flue pipe and the effective pressure resistance of the air supply
3.26
secondary air device
draught regulator or a draught diverter
3.27
draught regulator
component which automatically supplies ambient air to the chimney, the connecting flue pipe or the heating
appliance
3.28
draught diverter
device, placed in the combustion products passage of the heating appliance, that is intended to maintain the
quality of combustion within certain limits and to keep the combustion stable under certain conditions of up
draught and down draught
3.29
temperature limit of the inner wall (T )
g
allowed minimum temperature of the inner wall of the chimney outlet
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3.30
air-flue gas system
system of concentric or non-concentric ducts for transport of combustion air from the open air to the heating
appliance and products of combustion from the heating appliance to the open air
3.31
air-supply duct
component or components parallel to the chimney (separate or concentric) that conveys combustion air from
the outside atmosphere to the inlet of the connecting air supply pipe
3.32
balanced flue chimney
chimney where the point of air entry to the air supply duct is adjacent to the point of discharge of combustion
products from the flue, the inlet and outlet being so positioned that wind effects are substantially balanced
3.33
chimney segment
calculation part of a chimney
3.34
condensate mass flow ( ∆m )
D
mass of water vapour of the flue gas condensed in the heating appliance, connecting flue pipe or the chimney
per time unit
3.35
connecting air supply pipe
component or components connecting the air supply duct outlet with the room-sealed heatin
...
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