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      DAYLIGHTING PERFORMANCE SIMULATION: PREDICTION ACCURACY/PROCESSING SPEED TRADE-OFF

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          ABSTRACT

          In daylighting performance simulations of façade systems, a trade-off is often required between processing speed and prediction accuracy. This is particularly relevant at design onset, where plausible simulation outcomes are essential to drive decisions between several alternative façade configurations. To help address this trade-off, this paper presents a sensitivity analysis evaluating the influence of key input parameter settings, namely ambient bounces and grid size, on the convergence of performance outcomes and on simulation run times. The results provide statistical evidence that, although lower precision settings mostly accelerate calculations, they decrease the accuracy of prediction estimates, particularly for complex façades. Conversely, the relative increased accuracy resulting from higher precision simulations might reach a point where differences have a negligible practical impact. The paper concludes with a range of recommendations to support the early-stage selection of parameter settings and contributes to more robust simulation outcomes towards reducing the gap between simulated and measured data.

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          Most cited references39

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          An effect size primer: A guide for clinicians and researchers.

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            The Essential Guide to Effect Sizes

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              Contrasting the capabilities of building energy performance simulation programs

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                Author and article information

                Journal
                jgrb
                Journal of Green Building
                College Publishing
                1943-4618
                1552-6100
                Spring 2023
                20 June 2023
                : 18
                : 2
                : 133-157
                Affiliations
                [1 ]Lecturer at Al-Azhar University, Architecture department
                [2 ]Associate professor at University of Nottingham, Department of Architecture and Built Environment, Human Factors Research Group
                [3 ]Al-Azhar University, Architecture department
                Article
                10.3992/jgb.18.2.133
                c7308677-d8bd-4b5d-bd55-a8828694a707
                © 2023 College Publishing
                History
                Page count
                Pages: 25
                Categories
                RESEARCH ARTICLES

                Urban design & Planning,Civil engineering,Environmental management, Policy & Planning,Architecture,Environmental engineering
                grid size,ambient bounces,processing speed,sensitivity analysis,daylighting,prediction accuracy,glare

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