TECHNICAL ISO/IEC TR REPORT 23050 First edition 2019-03 Information technology - Data centres Impact on data centre resource metrics of electrical energy storage and export Reference number IEC ISO/IEC TR 23050:2019(E) @IS0/IEC2019 IS0/IEC TR 23050:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0/IEC 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: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2019 - All rights reserved IS0/IEC TR 23050:2019(E) Contents Page Foreword .iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms, definitions, abbreviated terms and symbols 3.1 Terms and definitions .1 3.2 Abbreviated terms.. .2 3.3 Symbols .2 4 Objectives. .2 4.1 Energy storage types and dispositioning .2 4.2 Energy flow in data centres .3 5 Determination of Excess Electrical Energy Factor (XEEF) .4 6 Measurement of Excess Electrical Energy Factor (XEEF) .4 7 Reporting of Excess Electrical Energy Factor (XEEF) 5 7.1 Construct for communicating XEEF data. .5 7.2 Additional information for public reporting of XEEF 5 7.3 Supporting information for public reporting of XEEF .5 7.4 Trend tracking data.. 5 Annex A (informative) Example of energy flow representation in a data centre, showing XEEF in complement with other KPIs (PUE, REE, ERF) 7 Bibliography 9 @ IS0/IEC 2019 - All rights reserved iii