Title ISO 16911-1-2013 - NSC 26-TC 8-WG 4.pdf ✅

ISO 16911-1:2013(E) ii © ISO 2013 – All rights reserved COPYRIGHT PROTECTED DOCUMENT © ISO 2013 All rights reserved. Unless otherwise specified, 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 Case postale 56 • CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland Licensed to NSC 26/TC 8/WG 4. For reference use only; Date 19/12/2024. Single user licence only, copying and networking prohibited.
ISO 16911-1:2013(E) © ISO 2013 – All rights reserved iii Contents Page Foreword..........................................................................................................................................................................................................................................v Introduction................................................................................................................................................................................................................................vi 1 Scope.................................................................................................................................................................................................................................1 2 Normative references......................................................................................................................................................................................1 3 Terms and definitions.....................................................................................................................................................................................1 4 Symbols and abbreviated terms...........................................................................................................................................................3 4.1 Symbols ......................................................................................................................................................................................................... 3 4.2 Abbreviated terms ............................................................................................................................................................................... 7 5 Principle........................................................................................................................................................................................................................7 5.1 General........................................................................................................................................................................................................... 7 5.2 Principle of flow velocity determination at a point in the duct.................................................................... 8 5.3 Principle of measurement of volume flow rate........................................................................................................... 8 6 Selection of monitoring approach...................................................................................................................................................10 6.1 Monitoring objective.......................................................................................................................................................................10 6.2 Choice of technique to determine point flow velocity.......................................................................................11 6.3 Choice of technique for volume flow rate and average flow determination...................................12 7 Measuring equipment..................................................................................................................................................................................12 7.1 General........................................................................................................................................................................................................12 7.2 Measurement of duct area .........................................................................................................................................................13 8 Performance characteristics and requirements ..............................................................................................................13 9 Measurement procedure...........................................................................................................................................................................14 9.1 Site survey before testing ...........................................................................................................................................................14 9.2 Determination of sampling plane and number of measurement points............................................14 9.3 Checks before sampling................................................................................................................................................................14 9.4 Quality control......................................................................................................................................................................................16 9.5 Measurement of flow at locations within the measurement plane........................................................16 9.6 Post-measurement quality control.....................................................................................................................................17 10 Calculation of results ....................................................................................................................................................................................17 10.1 General........................................................................................................................................................................................................17 10.2 Measurement of velocity.............................................................................................................................................................17 10.3 Determination of the mean velocity..................................................................................................................................18 10.4 Correction of average velocity for wall effects..........................................................................................................18 10.5 Calculation of the volume flow rate from the average velocity..................................................................18 10.6 Conversion of results to standard conditions............................................................................................................19 11 Establishment of the uncertainty of results..........................................................................................................................20 12 Evaluation of the method..........................................................................................................................................................................20 Annex A (normative) Measurement of velocity using differential pressure based techniques...........22 Annex B (normative) Vane anemometer.......................................................................................................................................................34 Annex C (normative) Tracer gas dilution method determination of volume flow rate and average velocity..................................................................................................................................................................................................40 Annex D (normative) Transit time tracer gas method determination of average velocity.......................46 Annex E (normative) Calculation of flue gas volume flow rate from energy consumption......................53 Annex F (informative) Example of uncertainty budget established for velocity and volume flow rate measurements by Pitot tube.....................................................................................................................................................61 Annex G (informative) Description of validation studies ............................................................................................................72 Licensed to NSC 26/TC 8/WG 4. For reference use only; Date 19/12/2024. Single user licence only, copying and networking prohibited.
ISO 16911-1:2013(E) iv © ISO 2013 – All rights reserved Annex H (informative) Differential pressure measurement....................................................................................................79 Annex I (informative) The use of time of flight measurement instruments based on modulated laser light...................................................................................................................................................................................................................82 Annex J (informative) Relationship between this International Standard and the essential requirements of EU Directives ............................................................................................................................................................83 Bibliography.............................................................................................................................................................................................................................84 Licensed to NSC 26/TC 8/WG 4. For reference use only; Date 19/12/2024. Single user licence only, copying and networking prohibited.