ISO INTERNATIONAL STANDARD 13612-2 First edition 2014-05-01 Heating and cooling systems in buildings Method for calculation of the system performance and system design for heat pump systems - Part 2: Energy calculation Systemes de chauffage et de refroissement dans les batiments - Méthode de calcul de la performance du systeme et de la conception dusystemepourlessystemesdepompesachaleur- Partie 2: Calcul énergétique Reference number ISO 13612-2:2014(E) LSO @ IS0 2014 y IHS under I without license from IHS Not for Resale IS0 13612-2:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2014 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 copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 13612-2:2014(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..2 4 Symbols and abbreviated terms. .7 5 Principle of the method .9 5.1 Flowchart of the calculation method 9 5.2 System boundary .13 5.3 Physical factors. .13 5.4 Schematization of the heat pump for heating and cooling 14 5.5 Input and output of the calculation method. .16 5.6 Energy input needed to meet the heat requirements for electrically driven heat pumps..16 5.7 Auxiliary energy, WW,gen,aux 17 5.8 Recoverable, recovered, and unrecoverable heat losses .17 5.9 Calculation periods.. .18 5.10 Calculation by zones. .18 6 Generation subsystem calculation. ..19 6.1 Inputdata 19 6.2 Energy requirements for space heating, space cooling, and DHW mode 20 6.3 Tabulated values of the CoP for heating and cooling at full load 20 6.4 Heat losses through the generator envelope. 20 6.5 Calculation of back-up heater... 22 6.6 Running time of the heat pump 24 6.7 Auxiliaryenergy 32 6.8 Total losses and total recoverable heat loss of the generation subsystem 33 6.9 Calculation of total energy input. .35 6.10 Summary of output values. 40 Annex A (informative) Construction of coP matrix with a single test result .41 Annex B (informative) Calculation ofthe CoP based on interpolation of values ..51 Annex C (informative) Calculation of heat pump CoP and thermal capacities at part loadconditions. ..57 Annex D (informative) Model of heat pump in the BEST program ..65 Annex E (informative) Energy evaluation for other kinds of heat pumps ("cO2 heat pump water heater" and "air-conditioner and water heater combined systems") .97 Bibliography 115 iii Not for Resale