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Assessing the Energy Saving Potential of Daylighting
Technologies for Non-residential Buildings in Germany
Anne Kovach-Hebling*), Manuel Goller**), Sebastian Herkel**), Jan Wienold**)
*) PSE Projektgesellschaft Solare Energiesysteme, Solarhaus, Christaweg 40, D-79114 Germany +49-761-4588-117
**) Fraunhofer Institute for Solar Energy Systems, Oltmannstr. 5, D-79100, Freiburg, Germany Tel.: +49-761-4588-296
Abstract
The aim of this work was to obtain a reliable estimate of how the use of daylighting technologies may contribute to the reduction of the energy consumption in non-residential buildings in Germany. In particular, the impact of different daylighting strategies on the lighting, cooling and heating loads of the building was investigated. Strategies using light directing and diffusing elements in combination with a dimming control for the installed luminaires were simulated for representative non-residential buildings in Germany.
A dynamic lighting simulation with a link to a thermal building simulation enabled the evaluation of coupled lighting and thermal energy savings. In this on-going project the first results, carried out in hourly time steps for an entire year, show a more homogeneous illumination distribution in the room as a result of the daylighting elements and reduced annual energy consumption in comparison to standard glazings with no automated lighting controls.
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