ISO/TR TECHNICAL REPORT 16219 First edition 2020-09 Fans System effects and system effect factors Ventilateurs - Effet systeme et facteurs d'effet systeme Reference number IS0/TR16219:2020(E) ISO @IS02020 IS0/TR 16219:2020(E) COPYRIGHT PROTECTED DOCUMENT @ iS02020 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: +41 22 749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0 2020 - All rights reserved IS0/TR 16219:2020(E) Contents Page Foreword .iv Introduction. .V 1 Scope. .1 2 Normative references .1 3 Terms, definitions and symbols. .1 4 Origin of fan system effects .2 5 Definitions of system effect factor (SEF) .4 5.1 InletSEF 4 5.2 Outlet system effect .6 6 Examples of inlet SEF 9 6.1 Introduction 9 6.2 Axial fans 10 6.2.1 Experimental setups 10 6.2.2 Results... 15 6.3 Centrifugal and mixed-flow fans. 17 6.3.1 Experimental setups 17 6.3.2 Results. 24 7 Examples of outlet SEF .30 7.1 Axial fans 30 7.1.1 General. 30 7.1.2 Experimental setups 30 7.1.3 Results. 30 7.2 Centrifugal and mixed-flow fans .32 7.2.1 Experimental setups 32 7.2.2 Results. 33 8 Reducing system effects .34 8.1 General. 34 8.2 Inleteffects. 34 8.2.1 General 34 8.2.2 Non-uniform flow. 35 8.2.3 Swirl or vorticity 36 8.2.4 Inlet blockage. 36 8.3 Outleteffects 39 8.3.1 General. 39 8.3.2 Insufficient duct length 39 8.3.3 Outlet obstruction.. 40 8.3.4 Non-uniform flow. 40 8.4 Examples of the effects of poor inlet and outlet connections .43 9 Conclusions ..44. Annex A (informative) Basic principles on fan performance representation .45 Annex B (informative) Fan system calculation .73 Bibliography ..83 @ IS0 2020 - All rights reserved ii IS0/TR 16219:2020(E) Foreword IsO (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 throughIsotechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnical 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 Electrotechnical 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 documents 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 responsible 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 given for the convenience of users and does not constitute an endorsement. For an explanation of the voluntary nature of standards, the meaning of IsO specific terms and expressions related to conformity assessment, as well as information about Iso's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see WWw.iso.org/ iso/foreword.html This docu