ISO/TR TECHNICAL REPORT 52010-2 First edition 2017-06 Energy performance of buildings External climatic conditions Part 2: Explanation and justification of ISO 52010-1 Performance énergetique des batiments - Conditions climatiques exterieures- Partie 2: Explication et justification de I'IS0 52010-1 Reference number IS0/TR 52010-2:2017(E) [so International Organization for Standardization @ IS0 2017 HEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS IS0/TR 52010-2:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ensee-ZHEJIANG INSTOF STANDARDIzARoISQa7 - All rights reserved I by IHS unide Not for Resale, 2017/9/12 02:35:59 networking permited without license from IHS IS0/TR 52010-2:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions 4 Symbols and subscripts. .1 5 Description of the methods ..1 5.1 Output of the method .1 5.2 General description of the method 2 5.2.1 Calculation ofthe distribution of solar irradianceon a non-horizontal plane 2 5.2.2 Calculation of solar shading by distant objects .3 6 Calculation method .4 6.1 Outputdata 4 6.2 Calculation time intervals .4 6.3 Inputdata 4 6.4 Calculation procedure .4 6.4.1 Calculation of the sun path 4 6.4.2 Split between direct and diffuse solar irradiance. .4 6.4.3 Solar reflectivity of the ground. 4 6.4.4 Calculation of the total solar irradiance at given orientation and tilt angle .4 6.4.5 Calculation of shading by external objects .5 6.4.6 Calculation of illuminance. .5 7 Quality control .5 8 Compliance check .5 9 Directional (spatial) distribution of hourly solar irradiation or illumination (not covered in IS0 52010-1) .5 9.1 General. .5 9.2 Tregenza elements. .6 9.3 Allocation of the radiation in each element .6 9.4 Plane at certain orientation and tilt 9.5 References. .9 10 Worked out examples .9 10.1 Method calculation of the total solar irradiation at given orientation and tilt angle 10.2 Calculation of shading by external objects .9 11 Validation. .9 12 Information on the accompanying spreadsheet ..12 Annex A (informative) Input and method selection data sheet - Template. ..13 Annex B (informative) Input and method selection data sheet - Default choices ..14 Annex C (informative) Calculation examples on the solar irradiation at given orientation and tilt angle .15 Annex D (informative) Calculation examples on the effect of solar shading .20 Bibliography .23 iii ZHEJIANG INST OF STANDARDIZATION C1 5956617