Aperture-Based Daylight Modelling

Evaluating the Airmass Refinement for the Sunlight Beam Index

Conference paper (2022)

Authors

John Mardaljevic Loughborough University
E. Brembilla Environmental & Climate Design - Architecture and the Built Environment
Research Group
Environmental & Climate Design (Architecture and the Built Environment) (TU Delft)
Copyright: © 2022 J. Mardaljevic, E. Brembilla
DOI: https://doi.org/10.26868/25222708.2021.30604
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Published Date

2022

Language

English

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Faculty

Architecture and the Built Environment

Department

Architectural Engineering +Technology

Research Group

Environmental & Climate Design

Abstract

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.

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