Einbindung tageslichttechnischer Messwerte in Planungsprogramme am Beispiel eines neuartigen Sonnenschutzsystems

Aydınlı, Sırrı; Gramm, Stefan; Kaase, Heinrich; Köster, Helmut

doi:10.1002/bapi.201510030

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…1-1.75 m height) and redirection in the upper fenestration (ca. 1.75-2.75 m height) via an integrated lightshelf (Aydınlı et al 2015;Köster 2015).…”

Section: Resultsmentioning

confidence: 99%

An out-of-core photon mapping approach to daylight coefficients

Schregle

Grobe

Wittkopf

2016

Journal of Building Performance Simulation

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Climate-based daylight modelling (CBDM) is an effective means of assessing the performance of daylight redirecting components (DRCs) with highly directional scattering to determine their impact on daylight availability and visual comfort. Such a simulation imposes significant computational demands on commodity hardware as it requires high density luminance samples obtained by forward raytracing. We propose an out-of-core photon mapping method within the RADIANCE framework to compute high quality daylight coefficients as a basis for CBDM. The method is particularly suited to angularly selective DRCs exhibiting strong redirection in conjunction with non-uniform sky luminance distributions with high resolution subdivisions. Our implementation is a work in progress and currently accommodates up to 4.3G photons on disk, while optimizing the in-core memory footprint by loading only photons which actually contribute flux to sensor points. We also leverage the fact that photon paths are independent through parallelization.

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“…1-1.75 m height) and redirection in the upper fenestration (ca. 1.75-2.75 m height) via an integrated lightshelf (Aydınlı et al 2015;Köster 2015).…”

Section: Resultsmentioning

confidence: 99%

An out-of-core photon mapping approach to daylight coefficients

Schregle

Grobe

Wittkopf

2016

Journal of Building Performance Simulation

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“…In wg2 and wg3, configuration CFS2 retro-reflects sun-light to reduce glare and solar gains. It maintains a view to the outside due to the particular profile of the slats allowing an almost horizontal orientation [44,45]. The system is chosen as an example that allows both geometric and data-driven modelling.…”

Section: Fs1: Static Retro-reflecting Fenestrationmentioning

confidence: 99%

Photon-mapping in Climate-Based Daylight Modelling with High-resolution BSDFs

Grobe

2019

Energy and Buildings

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Visual comfort assessments employing luminance-based metrics rely on efficient CBDM techniques for image synthesis. Data-driven BSDF models allow to isolate internal light paths in optically CFS from CBDM. Bidirectional photon mapping is proposed for the efficient sampling of such models in the calculation of the direct solar component in CBDM. The method allows accurate image synthesis for visual comfort assessments with only two calculation steps, achieving comparable accuracy as the established but complex 5PM. The validity of the approach is confirmed by comparison with backward ray-tracing. Its exemplary application to compare two CFS in terms of glare control demonstrates the importance to achieve reconcilability of conflicting targets such as view and glare control in daylighting.

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Strahlungsphysikalische und lichttechnische Kennzahlenvon Tageslichtsystemen

2018

Solarstrahlung Und Tageslicht

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Einbindung tageslichttechnischer Messwerte in Planungsprogramme am Beispiel eines neuartigen Sonnenschutzsystems

Cited by 3 publications

References 1 publication

An out-of-core photon mapping approach to daylight coefficients

An out-of-core photon mapping approach to daylight coefficients

Photon-mapping in Climate-Based Daylight Modelling with High-resolution BSDFs

Strahlungsphysikalische und lichttechnische Kennzahlenvon Tageslichtsystemen

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