ISO INTERNATIONAL STANDARD 50047 Firstedition 2016-11-01 Energy savings - Determination of energy savings in organizations Economies d'énergie - Détermination des économies d'énergie dans lesorganismes Reference number IS050047:2016(E) iso @ISO 2016 lards Bodies 930975001,User=bao,zhot No reproduction or networking permitted without license from IHS IS0 50047:2016(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form writtenpermission.PermissioncanberequestedfromeitherIsoattheaddressbeloworIso'smemberbodyinthecountryof the requester ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org @ IS0 2016 - All rights reserved Licensee=Universita di Bologna/5930975001, User=bao, zhou No reproduction or networking permited without license from IHS Not for Resale, 11/24/2016 18:58:29 MS IS0 50047:2016(E) Contents Page Foreword ..V Introduction. .. i. 1 Scope.. 2 Normative references 3 Terms and definitions .1 4 Preliminary considerations and boundaries .5 4.1 Preliminary considerations. .5 4.2 Approaches to determining energy savings .5 4.2.1 Two approaches to determining energy savings 5 4.2.2 Organization-based approach. 5 4.2.3 EPIA-based approach 6 4.3 Determining the boundaries.. 7 5 Energy accounting .8 5.1 General principles of energy accounting 8 5.2 Measurementofenergyconsumptionandstocks 8 5.3 Types of energy with relatively insignificant consumption 9. 5.4 Expressingenergyconsumptionincommonunits ..10 5.5 Primary and delivered energy. .10 5.5.1 General. ..10 5.5.2 Conversion of delivered energy to primary energy .11 6 Data preparation for determination of energy savings ..12 6.1 Selection oftimeperiods ..12 6.2 Establishing the energy baseline .12 6.3 Non-routine adjustments. .13 6.4 Normalization for relevant variables. ..13 6.4.1 General principles. .13 6.4.2 Methods of normalization 6.4.3 Summary of normalizationmethods .15 6.4.4 Determination of normalized energy consumption .15 7 Calculation of energy savings ..18 7.1 General principles .18 7.2 EPIA-based approach to determining energy savings .20 7.2.1 General principles.. .20 7.2.2 Indirect energy effects .20 7.2.3 Avoiding double counting 21 7.3 Ensuring consistency between organization-based and EPIA-based approaches 21 Improvingtheaccuracy of energy savingsresults .22 8 8.1 Data quality 22 8.2 Errors in determining energy savings .22 8.3 Acceptable uncertainty criteria .23 9 Reporting energy savings. .23 9.1 General. .23 9.2 Reporting considerations for groups of companies .23 9.3 Communicating energy savings results. .23 Annex A (informative) Flowchart for determination of energy savings .25 Annex B (informative) Reconciliation between organization level and EPIA-based energysavings ..26 Annex C (informative) Example of energy accounting in a cement plant ..28 Annex D (informative) Example of normalization ofenergy consumption in a cement plant .32 coyihntematioalh rights reerved ili Licensee=Universita di Bologna/5930975001, User=bao, zhou No reproduction or networking permitted without license from IHS Not for Resale, 11/24/2016 18:58:29 MS