ISO INTERNATIONAL STANDARD 50045 First edition 2019-03 Technical guidelines for the evaluation of energy savings of thermal power plants Lignes directrices technigues pour I'évaluation des économies d'énergie des centrales électriques thermiques Reference number IS0 50045:2019(E) so @ IS0 2019 IS0 50045:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 50045:2019(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. 2 Normative references ..1 3 Terms and definitions 4 Symbols, units and abbreviations. ..4 5 Evaluation of energy savings .5 5.1 General. .5 5.2 Principles. ..6 5.3 Evaluation indexes. .7 6 Unit component efficiency .8 6.1 Boilers ..8 6.1.1 Boundary .8 6.1.2 Boiler energy balance. 6.1.3 Boiler efficiency calculations .11 6.1.4 Others. 12 6.2 Steam turbine/generator efficiency ..12 6.3 Gas turbine efficiency .13 6.3.1 General ..13 6.3.2 Simple cycle gas turbine systems .14 6.3.3 Combined cycle power plants .14 7 Calculation of evaluation indexes. ..16 7.1 Fuel equivalent .16 7.2 Fuel equivalent consumption rate .16 8 Analyses and performance evaluation .16 8.1 Procedure for evaluation. .16 8.2 Evaluation of energy savings .18 8.2.1 Determination of energy savings income .18 8.2.2 Analyses for financial benefits .19 9 Reporting .20 9.1 Project overview .20 9.2 Current status and energy consumption of equipment 20 9.3 Analysis of influencing factors. 21 9.4 Analysis of energy-savings potential 21 9.5 Suggestions and measures for energy-savings .21 Bibliography .22 IS0 2019 - All rights reserved iii