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Aperture-based daylight modelling: evaluating the airmass refinement for the sunlight beam index

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conference contribution
posted on 2023-04-21, 08:50 authored by John MardaljevicJohn Mardaljevic, Eleonora Brembilla
Aperture-based daylight modelling (ABDM) is a new building simulation paradigm founded on measures of an aperture's 'connectedness' to the sun and the external environment. At the planning level, there currently does not exist anywhere an evaluative schema which is equally applicable to measures of solar energy potential (for PV performance, overheating risk, etc) and measures of sunlight/daylight amenity (for daylight, well-being, connectivity/view, etc). ABDM addresses that shortcoming. This paper describes the latest development of ABDM which is the addition of an airmass factor in the computation of the sunlight beam index (SBI). This enhancement preserves the 'geometrical purity' of ABDM, but now airmass SBI can serve as a reliable proxy for direct sun irradiation totals derived from weather files.

History

School

  • Architecture, Building and Civil Engineering

Published in

Proceedings of Building Simulation 2021: 17th Conference of IBPSA

Pages

342 - 349

Source

Building Simulation 2021: 17th Conference of IBPSA

Publisher

International Building Performance Simulation Association (IBPSA)

Version

  • VoR (Version of Record)

Rights holder

© International Building Performance Simulation Association

Publisher statement

This paper was published in the Proceedings of Building Simulation 2021: 17th Conference of IBPSA. This paper is available at https://doi.org/10.26868/25222708.2021.30604 and is reproduced here with the permission of the publisher.

Publication date

2022-01-01

Copyright date

2022

ISBN

9781775052029

ISSN

2522-2708

Language

  • en

Editor(s)

D. Saelens; J Laverge; W. Boydens; L. Helsen

Location

Bruges, Belgium

Event dates

1st September 2021 - 3rd September 2021

Depositor

Prof John Mardaljevic. Deposit date: 20 April 2023

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