BS ISO 13579-4:2013 BSl Standards Publication Industrial furnaces and associated processing equipment Method of measuring energy balance and calculating efficiency Part 4: Furnaces with protective or reactive atmosphere BSi raising standards worldwide" BS ISO 13579-4:2013 BRITISH STANDARD Institution 2013 National foreword This British Standard is the UK implementation of ISO 13579-4:2013. The Uk participation in its preparation was entrusted to Technical BritishStandards CommitteeRHE/13,Oil burningequipment. 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 responsible for its correct application. The @ The British Standards Institution 2013. Published by BSI Standards Limited 2013 ISBN9780580725135 ICS 25.180.01 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the 08:46, Amendments issued sincepublication 11/03/2013 Date Textaffected Malaysia, , Universiti Teknologi i Malaysia User, Teknologi Universiti I Copy: Mr. Licensed BS ISO 13579-4:2013 INTERNATIONAL ISO 2013 STANDARD 13579-4 Institution The British Standards First edition 2013-01-15 Copy, led Industrial furnaces and associated Uncontroll processing equipment Method of measuring energy balance and calculating efficiency - 08:46. Part 4: /2013 Furnaces with protective or reactive atmosphere Malaysia, Fours industriels etéquipementsassocies-Methodedemesuredu bilanénergetiqueetdecalculde/'efficacite Partie4:Fours aatmospherecontroleeouactive Teknologi Universiti User, Malaysia Universiti I Copy: Mr. Reference number ISO 13579-4:2013(E) @ISO2013 BS ISO 13579-4:2013 ISO13579-4:2013(E) Institution 2013 BritishStandards The 08:46, 11/03/2013 i Malaysia, , Universiti Teknologi User, ysia Malay 60 OU COPYRIGHTPROTECTEDDOCUMENT ISO 2013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office JW Casepostale56.CH-1211Geneva20 Tel. + 41 22 749 01 11 Copy Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Licensed Published in Switzerland ii @ ISO 2013 All rights reserved BS ISO13579-4:2013 ISO13579-4:2013(E) 201 n nsti ds Contents Page Foreword. Introduction .vi he 1 Scope.. 2 Normative references. 3 Terms and definitions... 3.1 Terms relating to type of energy used in this part of iso 13579 pe 4 Symbols. C 5 Basic principles. 5.1 5.2 Energy flow diagram.... 5.3 ProcessHeatingAssessmentSurveyTool. .10 6 Basicconditionsofmeasurementandcalculation 6.1 State of furnace ... 10 6.2 Duration of measurement. 10 6.3 Unit of specific energy intensity 6.4 Reference conditions... 10 6.5 Unit of amount of gas.. 10 6.6 10 Typeof energyused inthispartof Iso13579 10 7.1 General. .10 7.2 Energy balance.... 10 7.3 Thermal energy balance.. 12 7.4 Energybalanceofelectricalgeneration 7.5 Recycled energy... .14 8 Measurement method.. .14 8.1 General... 14 8.2 14 8.3 Combustion air and exhaust gas... 8.4 Controlled atmospheric gas... 17 8.5 Products.. 8.6 Temperatureoffurnace surface 17 8.7 Furnace innerwall temperature. 17 8.8 Innerfurnace pressure.. 17 8.9 Cooling water...... 17 8.10 Electrical auxiliary equipment... 8.11 Generation of utilities... 18 8.12 Recycled energy.... 18 9 Calculations 18 9.1 General provisions.. 9.2 Total energy input . .18 9.3 Total energy output. 19 9.4 Total energy efficiency. 21 10 Energybalanceevaluation report.. 22 Annex A (informative)Reference data.. 23 Annex B (informative)Report of energybalance and efficiency of a continuous gas carburizing furnace (whole process)Example..... @ ISO 2013 All rights reserved ii BS ISO 13579-4:2013 ISO 13579-4:2013(E) 2013 ition Annex C (informative) Report of measurement of energy balance and calculation of efficiency of a Institu