EN ISO 21654:2021

SLOVENSKI STANDARD
01-oktober-2021
Nadomešča:
SIST EN 15400:2011
Trdna alternativna goriva - Določevanje kalorične vrednosti (ISO 21654:2021)
Solid recovered fuels - Determination of calorific value (ISO 21654:2021)
Feste Sekundärbrennstoffe - Bestimmung des Brennwertes (ISO 21654:2021)
Combustibles solides de récupération - Détermination du pouvoir calorifique (ISO
21654:2021)
Ta slovenski standard je istoveten z: EN ISO 21654:2021
ICS:
75.160.10 Trda goriva Solid fuels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 21654
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2021
EUROPÄISCHE NORM
ICS 75.160.10 Supersedes EN 15400:2011
English Version
Solid recovered fuels - Determination of calorific value
(ISO 21654:2021)
Combustibles solides de récupération - Détermination Feste Sekundärbrennstoffe - Bestimmung des
du pouvoir calorifique (ISO 21654:2021) Brennwertes (ISO 21654:2021)
This European Standard was approved by CEN on 19 March 2021.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21654:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 21654:2021) has been prepared by Technical Committee ISO/TC 300 "Solid
recovered materials, including solid recovered fuels" in collaboration with Technical Committee
CEN/TC 343 “Solid Recovered Fuels” the secretariat of which is held by SFS.
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 2022, and conflicting national standards shall
be withdrawn at the latest by January 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 15400:2011.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN websites.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 21654:2021 has been approved by CEN as EN ISO 21654:2021 without any modification.

INTERNATIONAL ISO
STANDARD 21654
First edition
2021-06
Solid recovered fuels — Determination
of calorific value
Combustibles solides de récupération — Détermination du pouvoir
calorifique
Reference number
ISO 21654:2021(E)
©
ISO 2021
ISO 21654:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2021 – All rights reserved

ISO 21654:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
4.1 Gross calorific value . 2
4.2 Net calorific value . 3
5 Reagents . 3
6 Laboratory conditions . 4
7 Apparatus . 5
7.1 General . 5
7.2 Auxiliary equipment . 7
7.3 Balances . 7
8 Preparation of test sample . 8
9 Calorimetric procedure . 8
9.1 General . 8
9.2 Preparing the combustion vessel for measurement . 9
9.2.1 General procedure . 9
9.2.2 Using combustion aids .10
9.3 Assembling the calorimeter .11
9.4 Combustion reaction and temperature measurements .11
9.5 Analysis of products of combustion .12
9.6 Corrected temperature rise θ .12
9.6.1 Observed temperature rise .12
9.6.2 Isoperibol and static-jacket calorimeters .12
9.6.3 Adiabatic calorimeters .14
9.6.4 Thermometer corrections .14
9.7 Reference temperature .14
10 Calibration .14
10.1 Principle .14
10.2 Calibration reference .15
10.2.1 Certification conditions.15
10.2.2 Calibration conditions .15
10.3 Valid working range of the effective heat capacity ε .15
10.4 Ancillary contributions .16
10.5 Calibration procedure .16
10.6 Calculation of effective heat capacity for the individual experiment .17
10.6.1 Constant mass-of-calorimeter-water basis .17
10.6.2 Constant total-calorimeter-mass basis .17
10.7 Precision of the mean value of the effective heat capacity ε .18
10.7.1 Constant value of ε . .18
10.7.2 ε as a function of the observed temperature rise.19
10.8 Repetition of the determination of effective heat capacity .19
11 Gross calorific value .19
11.1 General .19
11.2 Combustion .20
11.3 Calculation of gross calorific value .
...