ISO INTERNATIONAL STANDARD 19659-2 First edition 2020-07 Railway applications - Heating, ventilation and air conditioning systems for rolling stock Part 2: Thermal comfort Applications ferroviairesSystemes de chauffage,ventilation et climatisationpourlematerielroulant- Partie 2: Confort thermique Reference number IS0 19659-2:2020(E) ISO @IS02020 IS019659-2:2020(E) COPYRIGHTPROTECTEDDOCUMENT 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 below or Iso's member body in the country of the requester. ISo copyright office CP 40i: Ch.de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +4122749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland i @ IS0 2020 - All rights reserved IS019659-2:2020(E) Contents Page Foreword .V Introduction. .vi 1 Scope. .1 2 Normative references .1 3 Terms and definitions .1 4 Category of passenger railway vehicles .1 4.1 General 1 .1 4.2 Category 1 (e.g. main line, intercity, long-distance, high speed) 4.3 Category 2 (e.g. suburban, commuter, regional) .2 4.4 Category3 (e.g.urban, LRV,tram,metro/subway) 2 5 Design conditions .2 5.1 General 2 5.2 Exterior design conditions. 2 5.2.1 Parameters 2 5.2.2 Temperatureand correspondingrelativehumidity 2 5.2.3 Solar radiation 4 5.2.4 Altitude 4 5.2.5 Train speed 4 5.3 Extreme exterior conditions 5 5.4 Interior design condition... 5 5.4.1 Internal heat gains. 5 5.4.2 Temperature and corresponding relative humidity 5 6 Interior temperature setting (Ti) .6 7 Thermal comfort parameters .9 7.1 General .9 7.2 Interior airtemperature in the comfort zone 10 7.2.1 Mean interior temperature range (difference between Tim and Tic) .10 7.2.2 Horizontal temperature range (△Th) 10 7.2.3 Vertical temperature range (AT)) 10 7.3 Relativehumidityinthecomfortzone 10 7.4 Surfacetemperatureonthecomfortenvelope. 11 7.5 Airvelocity inthecomfortzone. 11 7.6 Interiortemperatureinthelocalannexes 12 7.7 Air quality 12 7.7.1 Freshair volumeflow rate into the comfort zone 12 7.7.2 Particulate filtration of the air. 13 7.7.3 Air transferbetween interior zones. .13 8 Air movement tests .13 8.1 General 13 8.2 Air volume flow rate .13 8.3 Airvelocity 14 8.4 Air transfer between interior zones 14 9 Climatic tests .14 9.1 General 14 9.2 Type of tests 15 9.2.1 General. 15 9.2.2 Design conditions test .15 9.2.3 Extreme conditions test. 15 9.2.4 Regulation test 15 9.2.5 Door open/close cycling test 16 9.3 Test programme. 16 @ IS0 2020 - All rights reserved iii