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An image-based analysis of solar radiation for urban settings

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conference contribution
posted on 10.02.2020, 10:24 by John Mardaljevic, Mark Rylatt
This paper describes a novel approach for evaluating the total annual/monthly irradiance incident on building facades in urban settings. The analysis is founded on a physically-based rendering approach and uses datavisualisation techniques to generate ‘maps’ (i.e. false-colour images) of annual/monthly irradiance. The irradiance ‘maps’ are derived from hourly time-series data for one year and take accurate account of shading by, and inter-reflection from, other buildings and surfaces. The sun and sky irradiance are evaluated separately. The sky contribution is calculated using realistic, non-isotropic models for the sky radiance distribution. The ‘maps’ can be used to confidently identify facade-locations where there is high irradiance, for example to aid the siting of photo-voltaic panels. The technique can be applied to scenes of arbitrary complexity from a single building to fully ‘worked-up’ city models. The results of the analysis have been linked to a GIS-based solar energy planning system. The system is targeted at city planners and one of its aims is to encourage the consideration of solar energy in the urban planning process.

Funding

EPSRC grant GR/L05372

History

School

  • Architecture, Building and Civil Engineering

Published in

Architecture, city, environment: proceedings of PLEA 2000

Pages

442 - 447

Source

17th International Passive and Low Energy Architecture (PLEA 2000) Conference - "Architecture + City + Environment"

Publisher

James & James

Version

AM (Accepted Manuscript)

Rights holder

© James & James (Science Publishers) Ltd

Publication date

2000

Notes

James & James (Science Publishers) Ltd. is now Earthscan part of Routledge.

ISBN

1902916166; 9781902916163

Language

en

Editor(s)

Koen Steemers, Simos Yannas

Location

Cambridge, UK

Event dates

2nd July 2000 - 5th July 2000

Depositor

Prof John Mardaljevic. Deposit date: 8 February 2020

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