[Zurück]

S. Dervishi:
"Architectural Lighting: Boundary Conditions and Computational Applications";
Fakultät für Architektur und Raumplanung, TU Wien, Institut für Architekturwissenschaften, Abteilung Bauphysik und Bauökologie, 2014.

none - see english version.

The main aim of the present research is to advance the state of art in generation of high-resolution sky radiance and sky luminance models. Such models are of essential importance in a host of scientific and engineering applications. An especially relevant class of such applications pertains to the deployment of computational performance simulation tools towards supporting the design and operation of energy-efficient and sustainable buildings and their systems. All of these applications require high-fidelity information on spatial and temporal distribution of solar irradiance and illuminance on building surfaces. The empirical basis for related decision making processes is, however, rather limited: Available measured data - collected by typical weather stations - is typically restricted to global horizontal irradiance. Few research-class climatic monitoring stations record also the diffuse component of solar irradiance. The proposed research shall thus examine a number of such models in detail and explore both improvement possibilities of existing models and the potential for alternative modeling approaches in future developments. Specifically, we aim at developing accurate high-resolution sky radiance and sky luminance models for the city of Vienna. In order to generate sky radiance maps, typically the diffuse radiation component of the global horizontal irradiance must be derived based on proper diffuse fraction models. Consequently, the proposed research starts with an attempt to improve existing diffuse fraction models. Once both diffuse and direct horizontal irradiance data is available, the existing models for sky radiance generation can be comprehensively evaluated and further developed to arrive at a more reliable locally verified sky radiance distribution model.
In addition to sky radiance distribution maps, which greatly support the design of buildings' solar energy systems, sky luminance maps are needed to support the design of buildings' daylighting systems. However, to generate sky luminance maps from sky radiance maps, appropriate luminous efficacy information is required, which is not available from typical weather stations. Therefore, the proposed research shall also explore methods with various
ii
degrees of resolution to derive illuminance data based on more broadly available global irradiance data. Solid high-resolution empirical data is needed not only to evaluate existing models, but also to develop and validate new models. For this purpose, we shall deploy our existing monitoring facility to systematically collect both typical weather station data and additional information concerning the diffuse component of the global horizontal irradiance, global horizontal illuminance, vertical irradiance, as well as detailed sky luminance and radiance distribution. The development of detailed and accurate sky luminance models is necessary for the simulation-based building systems control methodology in the lighting and shading domain. Thus, detailed sky information data can be incorporated to advanced simulation program for the calculation of the sky luminance maps toward the implementation of simulation-assisted systems control in lighting and shading domain.