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Using radiance to estimate transmitted solar radiation energy for thin perforated screens

conference contribution
posted on 06.08.2019 by Doris Abigail Chi Pool, Eleonora Brembilla
Design of shading systems is essential, since they plays an important role in the modulation of daylight and solar gains. Yet, current simulation tools are not capable of providing accurate results for both daylighting and energy performance simultaneously, especially when complex geometries are present. This work investigates whether shading coefficients (SC) can be applied to evaluate the performance of thin screens, and it compares the results to those obtained through other methods, such as the use of a fixed transmittance value over the whole year. Results showed that hourly SC can take into account the variability of total transmitted solar radiation throughout the year. As a result, the cooling energy reached reductions of up to 22 % in comparison to the use of a fixed transmittance value. SC also enabled the assessment of inter-reflections within the PS-glazing system, especially those resulted from varying the distance between the PS and glazing.

History

School

  • Architecture, Building and Civil Engineering

Published in

Proceedings of the 29th CIE Session, Washington D.C., USA, June 14 – 22, 2019

Pages

363-372

Source

29th Quadrennial Session of the CIE 2019: Connecting the World in Light

Publisher

International Commission on Illumination (CIE)

Version

VoR (Version of Record)

Rights holder

© CIE

Publication date

2019-06-24

Copyright date

2019

Notes

Please contact publisher for permissions

ISBN

9783902842749

Other identifier

OP50

Language

en

Location

Washington D.C., USA

Event dates

June 14th. – 22th.

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Categories

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