ISO INTERNATIONAL STANDARD 10051 First edition 1996-04-01 Thermal insulation Moisture effects on heat transfer -- Determination of thermal transmissivity of a moist material Isolation thermique - Effets de I'humidite sur les proprietes relatives au transfert de chaleur --- Determination de la transmissivite thermique d'un materiau humide ISo Reference number ISO10051:1996(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 10051:1996(E) Contents Page Scope 2 Normative references 3 Definitions 4 Symbols and units N 5 General considerations 5.1 Introduction 2 5.2 Description of heat and mass transfers 3 5.3 Determination of thermal transmissivity of a moist material 3 6 Test apparatus 5 7 Test procedure 5 7.1 General 5 7.2 . Specimen preparation and conditioning 5 7.3 Selection of phase A or C 6 Derivation of thermal transmissivity from measured values of heat flow and temperatures 6 7.5 Flow chart of possible test procedures 8 7.6 Sources of error 9 7.7 Calculations 9 8 Test report 9 Annexes A Theoretical background 11 B Evaluation of moisture flow and cases for which gy-he is small C Approximate solutions of a'(w) with negligible movement of liquid D Derivation of a* from measured values of heat flow and temperatures in phase C with movement of liquid in the test specimen 18 ISO1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Internationai Organization for Standardization Case Postale 56 : CH-1211 Geneve 20 · Switzerland Printed in Switzerland for Standardizatio No reproduction or networking permitted without li Not for Resale CISO ISO 10051:1996(E) E Bibliography 19 ili Copyightlntemational Organization for Standardization Nroucokingmiteithutlicefrm Not for Resale