Peter Apian-Bennewitz

Characterization of window materials using out-of-plane BSDF measurements, combining resolution of small-angle scattering and low level background scattering

Peter Apian-Bennewitz

The Bidirectional-Scatter-Distribution-Function (BSDF) is well established in research and engineering to describe scattering in terms of radiometry and geometrical optics. Two extreme cases of the BSDF are applicable to windows: First, the near Dirac-delta BSDF of transparent materials, whose imperfections govern the …

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BSDF Data generation for daylight applications: A call for international standardization

David Geisler‐Moroder, Eleanor S. Lee, Peter Apian-Bennewitz, Jan de Boer et autres

Standardized methods for generating angle-dependent, bidirectional, solar-optical properties for complex fenestration systems do not exist, which means that energy and daylight evaluations in building performance simulations often suffer from major inaccuracies. This position paper provides an overview of state-of-the-art data-driven methods for …

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Analysis and evaluation of BSDF characterization of daylighting systems

Peter Apian-Bennewitz, Jan de Boer, Bruno Bueno, Bertrand Deroisy et autres

This technical report summarizes the current state of the art in the field of characterization of daylighting and shading systems by bidirectional scattering distribution functions (BSDFs) and documents the results of an inter-laboratory round robin test. It is the result of collaborative …

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Design and Construction of a Device for Measuring Light-Scattering on Anisotropic Materials

Peter Apian-Bennewitz

This is my English translation of my diploma thesis of 1990 (in German). A translation seemed a worthwhile venture because this diploma thesis appears to be unknown today even to close collaborators. Yet it introduces some ideas in BSDF measurements that are …

Scanning Gonio-Photometers for Asymmetric Acquisition of Fine-structured BSDF

Peter Apian-Bennewitz

Results of building and running out-of-plane scanning gonio-photometers for a number of years and projects are presented. Key concepts are a fast drive system and adaptive scan pattern to sample peaks at higher angular resolution. It is suggested to scan the BSDF …

gb (code pays fourni par la source)

Review of simulating four classes of window materials for daylighting with non-standard BSDF using the simulation program Radiance

Peter Apian-Bennewitz

This review describes the currently available simulation models for window material to calculate daylighting with the program "Radiance". The review is based on four abstract and general classes of window materials, depending on their scattering and redirecting properties (bidirectional scatter distribution function, …

Review of simulating four classes of window materials for daylighting\n with non-standard BSDF using the simulation program Radiance

Peter Apian-Bennewitz

This review describes the currently available simulation models for window\nmaterial to calculate daylighting with the program "Radiance". The review is\nbased on four abstract and general classes of window materials, depending on\ntheir scattering and redirecting properties (bidirectional scatter distribution\nfunction, BSDF). It lists potential …

New scanning gonio-photometer for extended BRTF measurements

Peter Apian-Bennewitz

Measured data of the angular distribution of light scattering by surfaces (bi-directional-reflection-transmittancefunction, BRTF) has use in many fields: among them are stray light in lens design, projection screens,1 advanced architectural glazings and validating of surface and material models. Existing measurement devices either …

Experimental validation of bidirectional reflection and transmission distribution measurements of specular and scattering materials

Lars Oliver Grobe, Stephen K. Wittkopf, Peter Apian-Bennewitz, Jacob C. Jonsson et autres

The development of advanced materials for facades aims to achieve higher energy efficiency of buildings. Successful application of these materials depends on the availability of reliable characterization data. While data derived from integrated measurements of transmission and reflection is widely available, it …

sg, us (code pays fourni par la source)

Enhancing and calibrating a goniophotometer

Peter Apian-Bennewitz, Jochen von der Hardt

de (code pays fourni par la source)

Computer-oriented building design: Advances in daylighting and thermal simulation tools

Peter Apian-Bennewitz, Manuel Goller, Sebastian Herkel, Anne Kovach-Hebling et autres

de (code pays fourni par la source)

Amount of solar radiation absorbed by trough collectors with nonimaging optics

Andreas Haeberle, Peter Apian-Bennewitz, Thomas Walter Schmidt, Thomas Troescher et autres

Solar collectors using non-imaging mirror troughs (e.g. CPC-troughs) significantly alter the angular and spatial distribution of incident radiation from the aperture to the absorber surface. For flat plate collectors the transmission of transparent covers (including honeycomb transparent insulation materials) can be modelled …

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