ISO INTERNATIONAL STANDARD 9459-2 First edition 1995-08-15 Solar heating Domestic water heating systems Part 2: Outdoor test methods for system performance characterization and yearly performance prediction of solar-only systems Chauffage solaire --- Systemes de chauffage de I'eau sanitaire - Partie 2: Methode d'essai en exterieur pour la caracterisation de la performanceannuelle Referencenumber ISO 9459-2:1995(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 9459-2:1995(E) Contents Page 1 Scope 1 2 Normative references 1 3 Definitions 2 4 Symbols 5 5 System classifications 6 6 Requirements 8 Test procedure 11 8 Analysis and presentation of results 15 9 Prediction of long-term performance 19 Annexes A Format sheets for test and annual performance prediction for solar domestic water heating systems 25 B Computer programs for long-term performance prediction 51 c Test for systems with a midday draw-off 59 D Bibliography 60 @ISO1995 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. International Organization for Standardization CasePostale56·CH-1211Geneve20-Switzerland Printed in Switzerland ii Copyright I No reproduction or networking permited without icense from IHS Not for Resale @ ISO ISO 9459-2:1995(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 through IsO technical committees. Each member body interested in a subject for which a technical 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 closelywiththeInternational ElectrotechnicalCommission (IEC) on all matters of electrotechnical standardization circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 9459-2 was prepared by Technical Committee ISO/TC 180, Solar energy, Subcommittee SC 4, Systems Thermal performance, reliability and durability. Iso 9459 consists of the following parts, under the general title Solar heating -- Domestic water heating systems: Part 1: Performance rating procedure using indoor test methods Part 2: Outdoor test methods for system performance character- ization and yearly performance prediction of solar-only systems - Part 3: Performance test for solar plus supplementary systems Part 4: System performance characterization by means of com- ponent tests and computer simulation Part 5: System performance characterization by means of whole- system tests and computer simulation Annex A forms an integral part of this part of IsO 9459. Annexes B, C and D are for information only. ili Not for Resale