ISO INTERNATIONAL STANDARD 22975-3 First edition 2014-07-01 Solar energy - Collector components and materials - Part 3: Absorber surface durability Energie solaire - Composants et matériaux du collecteur - Partie 3: Durabilité de la surface de I'absorbeur Reference number IS0 22975-3:2014(E) ISO @IS02014 ermitted without license from IHS Not for Resale IS0 22975-3:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2014 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 @ IS0 2014 - All rights reserved or networking permited without license from IHS Not for Resale IS0 22975-3:2014(E) Contents Page Foreword ..iv Introduction 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions .1 4 Requirements and classification .2 5 Test methods for assessing material properties as measure of absorber performance 3 5.1 Sampling and preparation of test specimens 3 5.2 Sample conditioning. .4 5.3 Solar absorptance. .4 5.4 Thermal emittance ..4 5.5 Adhesion. .4 Tests for assessing the thermal stability of absorber surfaces. 6 4 6.1 Principle. ..4 6.2 Apparatus ..5 6.3 Procedure for execution of high temperature tests .6 6.4 Qualificationprocedure 7 7 Tests for determining the resistance to condensed water of absorber surfaces. .7 7.1 Principle 7 7.2 Apparatus ..8 7.3 Procedure for execution of constant condensation tests ..9 7.4 Qualification procedure .10 Test for determining absorber surface corrosion resistance to high humidity air 8 containing sulfur dioxide .10 8.1 Principle.. .10 8.2 Apparatus 11 8.3 Reference test specimen 12 8.4 Procedure for execution of corrosion test in high humidity air containing sulfur dioxide 12 8.5 Determination of shortest acceptable failure times in test by use of reference test specimens .13 8.6 Qualification procedure. .13 9 Test report .14 Annex A (normative) Procedure for determination of solar absorption and thermal emittance of absorber surfaces .15 Annex B (normative) Temperature and failure time characteristics in assessment of thermal stability of absorber surface 19 Annex C (normative) Temperature/condensation and failure time characteristics together with qualification scheme in assessment of resistance to condensed water of absorbersurface 25 Annex D (informative) Suitable designs for test apparatus to be used in the qualification testing of solar absorber surfaces ..28 Bibliography .30 ii thout license from IHS Not for Resale