Talks and Poster Presentations (with Proceedings-Entry):

S. Dervishi, A. Mahdavi:
"A comparison of luminous efficacy models for the diffuse compontent of solar radiation";
Talk: BauSim2012 - "Gebäudesimulation auf den Größenskalen Bauteil, Raum, Gebäude, Stadtquartier", Berlin; 2012-09-26 - 2012-09-28; in: "BauSIM 2012 - "Gebäudesimulation auf den Größenskalen Bauteil, Raum, Gebäude, Stadtquartier"", C. Nytsch-Geusen et al. (ed.); Eigenverlag / wissenschaftliches Kommittee der IBPSA Germany-Austria, 1 (2012), Paper ID 125, 4 pages.

English abstract:
To perform detailed architectural daylight analysis
via simulation, appropriate sky models are needed. In
the past, various sky luminance distribution models
have been developed. Such models, however, require
global and diffuse illuminance data for the relevant
location. Measured data on global and - especially -
diffuse external illuminance are available only for
few locations. Hence, methods are needed that can
derive from the more widely available irradiance data
the corresponding illuminance data via reliable
luminance efficacy models. In this context, the
present paper focuses specifically on the problem of
luminous efficacy models for the diffuse component
of solar radiation. Toward this end, we comparatively
evaluate several diffuse luminous efficacy models
based on a database of measured diffuse illuminance
and diffuse irradiance data from Vienna, Austria.
These models typically involve mathematical
formulations with multiple coefficients, whose values
are derived for a specific location. The evaluation of
the different models has been carried out considering
all sky conditions from sunny, to partly cloudy, to

German abstract:
[none - see English version]

Created from the Publication Database of the Vienna University of Technology.