1、Solid biofuels Determination of calorific valueBS EN ISO 18125:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 18125 May 2017 ICS 75.160.40; 27.190 Supersedes EN 14918:2009English Version Solid biofuels - D
2、etermination of calorific value (ISO 18125:2017) Biocombustibles solides - Dtermination du pouvoir calorifique (ISO 18125:2017) Biogene Festbrennstoffe - Bestimmung des Heizwertes (ISO 18125:2017) This European Standard was approved by CEN on 6 April 2017. CEN members are bound to comply with the CE
3、N/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 Ce
4、ntre 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 t
5、he 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, Nethe
6、rlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN
7、 All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 18125:2017 ENational forewordThis British Standard is the UK implementation of EN ISO 18125:2017. It is identical to ISO 18125:2017. It supersedes BS EN 14918:2009, which is withdraw
8、n.The UK participation in its preparation was entrusted to Technical Committee PTI/17, Solid biofuels.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are r
9、esponsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 89326 1ICS 27.190; 75.160.40Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of
10、 the Standards Policy and Strategy Committee on 31 August 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 18125:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 18125 May 2017 ICS 75.160.40; 27.190 Supersedes EN 14918:2009English Version Sol
11、id biofuels - Determination of calorific value (ISO 18125:2017) Biocombustibles solides - Dtermination du pouvoir calorifique (ISO 18125:2017) Biogene Festbrennstoffe - Bestimmung des Heizwertes (ISO 18125:2017) This European Standard was approved by CEN on 6 April 2017. CEN members are bound to com
12、ply 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-CENELE
13、C 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 s
14、ame 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, Luxembour
15、g, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Br
16、ussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 18125:2017 EBS EN ISO 18125:2017EN ISO 18125:2017 (E) 2 European foreword This document (EN ISO 18125:2017) has been prepared by Technical Committee ISO/TC 238 “Solid
17、biofuels“ in collaboration with Technical Committee CEN/TC 335 “Solid biofuels” the secretariat of which is held by SIS. 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 November 2017, and conflict
18、ing national standards shall be withdrawn at the latest by November 2017. 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 documen
19、t supersedes EN 14918:2009. 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, Former Yugoslav Republ
20、ic 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. Endorsement notice The text of ISO 18125:2017 has b
21、een approved by CEN as EN ISO 18125:2017 without any modification. ISO 18125:2017(E)Foreword v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 24.1 Gross calorific value 24.2 Net calorific value . 35 Reagents 36 Apparatus . 47 Preparation of test sample . 78 Calorimetric pro
22、cedure . 88.1 General . 88.2 Preparing the bomb for measurement 108.2.1 General procedure .108.2.2 Using combustion aid .108.3 Assembling the calorimeter 118.4 Combustion reaction and temperature measurements 118.5 Analysis of products of combustion . 128.6 Corrected temperature rise 128.6.1 Observe
23、d temperature rise 128.6.2 Isoperibol and static-jacket calorimeters 128.6.3 Adiabatic calorimeters .148.6.4 Thermometer corrections 148.7 Reference temperature . 149 Calibration .149.1 Principle . 149.2 Calibrant 159.2.1 Certification conditions. 159.2.2 Calibration conditions 159.3 Valid working r
24、ange of the effective heat capacity 159.4 Ancillary contributions . 169.5 Calibration procedure 169.6 Calculation of effective heat capacity for the individual experiment 179.6.1 Constant mass-of-calorimeter-water basis 179.6.2 Constant total-calorimeter-mass basis 179.7 Precision of the mean value
25、of the effective heat capacity . 189.7.1 Constant value of . 189.7.2 as a function of the observed temperature rise .199.8 Redetermination of the effective heat capacity .1910 Gross calorific value .1910.1 General 1910.2 Combustion . 2010.3 Calculation of gross calorific value . 2010.3.1 General. 20
26、10.3.2 Constant mass-of-calorimeter-water basis 2010.3.3 Constant total-calorimeter-mass basis 2210.3.4 as a function of the observed temperature rise .2310.4 Expression of results . 2310.5 Calculation to other bases 2311 Performance characteristics .24 ISO 2017 All rights reserved iiiContents PageB
27、S EN ISO 18125:2017ISO 18125:2017(E)Foreword v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 24.1 Gross calorific value 24.2 Net calorific value . 35 Reagents 36 Apparatus . 47 Preparation of test sample . 78 Calorimetric procedure . 88.1 General . 88.2 Preparing the bomb
28、for measurement 108.2.1 General procedure .108.2.2 Using combustion aid .108.3 Assembling the calorimeter 118.4 Combustion reaction and temperature measurements 118.5 Analysis of products of combustion . 128.6 Corrected temperature rise 128.6.1 Observed temperature rise 128.6.2 Isoperibol and static
29、-jacket calorimeters 128.6.3 Adiabatic calorimeters .148.6.4 Thermometer corrections 148.7 Reference temperature . 149 Calibration .149.1 Principle . 149.2 Calibrant 159.2.1 Certification conditions. 159.2.2 Calibration conditions 159.3 Valid working range of the effective heat capacity 159.4 Ancill
30、ary contributions . 169.5 Calibration procedure 169.6 Calculation of effective heat capacity for the individual experiment 179.6.1 Constant mass-of-calorimeter-water basis 179.6.2 Constant total-calorimeter-mass basis 179.7 Precision of the mean value of the effective heat capacity . 189.7.1 Constan
31、t value of . 189.7.2 as a function of the observed temperature rise .199.8 Redetermination of the effective heat capacity .1910 Gross calorific value .1910.1 General 1910.2 Combustion . 2010.3 Calculation of gross calorific value . 2010.3.1 General. 2010.3.2 Constant mass-of-calorimeter-water basis
32、2010.3.3 Constant total-calorimeter-mass basis 2210.3.4 as a function of the observed temperature rise .2310.4 Expression of results . 2310.5 Calculation to other bases 2311 Performance characteristics .24 ISO 2017 All rights reserved iiiContents PageBS EN ISO 18125:2017ISO 18125:2017(E)11.1 Repeata
33、bility limit . 2411.2 Reproducibility limit . 2412 Calculation of net calorific value at constant pressure .2412.1 General 2412.2 Calculations . 2413 Test report 25Annex A (normative) Adiabatic bomb calorimeters .26Annex B (normative) Isoperibol and static-jacket bomb calorimeters.30Annex C (normati
34、ve) Automated bomb calorimeters 36Annex D (informative) Checklists for the design and procedures of combustion experiments 39Annex E (informative) Examples to illustrate the main calculations used in this document when an automated bomb calorimeter is used for determinations 44Annex F (informative)
35、List of symbols used in this document 48Annex G (informative) Default values of most used solid biofuels for the calculations of calorific values .51Annex H (informative) Flow chart for a routine calorific value determination .52Bibliography .53Index 54iv ISO 2017 All rights reservedBS EN ISO 18125:
36、2017ISO 18125:2017(E)11.1 Repeatability limit . 2411.2 Reproducibility limit . 2412 Calculation of net calorific value at constant pressure .2412.1 General 2412.2 Calculations . 2413 Test report 25Annex A (normative) Adiabatic bomb calorimeters .26Annex B (normative) Isoperibol and static-jacket bom
37、b calorimeters.30Annex C (normative) Automated bomb calorimeters 36Annex D (informative) Checklists for the design and procedures of combustion experiments 39Annex E (informative) Examples to illustrate the main calculations used in this document when an automated bomb calorimeter is used for determ
38、inations 44Annex F (informative) List of symbols used in this document 48Annex G (informative) Default values of most used solid biofuels for the calculations of calorific values .51Annex H (informative) Flow chart for a routine calorific value determination .52Bibliography .53Index 54iv ISO 2017 Al
39、l rights reserved ISO 18125:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body int
40、erested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnic
41、al Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO docu
42、ments should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held respon
43、sible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents).Any trade name used in this document is information give
44、n for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) princip
45、les in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 238, Solid biofuels. ISO 2017 All rights reserved vBS EN ISO 18125:2017BS EN ISO 18125:2017Solid biofuels Determination of calorific value1
46、ScopeThis document specifies a method for the determination of the gross calorific value of a solid biofuel at constant volume and at the reference temperature 25 C in a bomb calorimeter calibrated by combustion of certified benzoic acid.The result obtained is the gross calorific value of the analys
47、is sample at constant volume with all the water of the combustion products as liquid water. In practice, biofuels are burned at constant (atmospheric) pressure and the water is either not condensed (removed as vapour with the flue gases) or condensed. Under both conditions, the operative heat of com
48、bustion to be used is the net calorific value of the fuel at constant pressure. The net calorific value at constant volume may also be used; formulae are given for calculating both values.General principles and procedures for the calibrations and the biofuel experiments are presented in the main tex
49、t, whereas those pertaining to the use of a particular type of calorimetric instrument are described in Annexes A to C. Annex D contains checklists for performing calibration and fuel experiments using specified types of calorimeters. Annex E gives examples to illustrate some of the calculations.2 Normative referencesThe 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 refe
