ISO INTERNATIONAL STANDARD 9459-4 First edition 2013-02-15 Solar heating - Domestic water heating systems Part 4: System performance characterization by means of component tests and computer simulation Chauffage solaire - Systemes de chauffage de I'eau sanitaire - Partie 4: Caracterisation de la performance des systemes au moyen d'essais effectués sur les composants et par simulation sur ordinateur Reference number ISO 9459-4:2013(E) @ ISO 2013 HS unde Not for Resale ISO 9459-4:2013(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2013 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 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 @ ISO 2013 - All rights reserved itted without license from IHS Not for Resale ISO9459-4:2013(E) Contents Page Foreword 0 Introduction 1 Scope 2 Normative references. 3 Terms and definitions 4 Symbols, units and nomenclature 5 Application 6 Test method .... 6.1 Introduction.. 6.2 Component testing.... 6.3 Water heater configuration for modelling........ Performance evaluation.... 10 7.1 Annual task performance 10 7.2 Weather data ... 7.3 Thermal energy loads 7.4 Thermostatsettemperature 7.5 Cold water inlet temperature.. 1 7.6 Pump circulation control..... 7.7 Simulation deck setup for modelling thermal stratification in storage tanks 12 7.8 Piping configuration for solar water heaters.... 13 7.9 Controllers... 7.10 Energyconsumed forfreeze protection 7.11 Over-temperature control.... 15 7.12 Modelling gas storage water heaters 15 7.13 Modelling instantaneous gas water heaters... 16 7.14 Presentation of results.... 17 7.15 Extension of simulation model for new products 19 Annex A (normative) Water heater parameters .... Annex B (normative) Storage vessel performance .... ...34 Annex C (normative) Integral collector storage unit test method .... Annex D (normative) Corrections for effect of hail guards on solar collector efficiency ... Annex E (normative) PV powered DC pumps in solar water heating systems ..... Annex F (normative) Heat exchanger test methods....... Annex G (normative) Reference conditions for testing and performance prediction Annex H (informative) Example simulation models ... Annex I (informative) Guidelines for equipment suppliers.. AnnexJ(informative)GuidelinesforCertificationBodies Bibliography. Copyright International Organization for Standardizallon'ghts reserved ii from IHS Not for Resale