Case studies on an integral, simulation-based energy-efficient open loop control for daylight and artificial lighting

Bearbeiterin: Kazi Alam (Studiengang Sustainable Energy Systems, FH OÖ – Campus Wels)

Betreuer: Martin Hauer

Co-Betreuer: Rainer PflugerDaniel PlörerMatthias Werner

Framework

The building of the Faculty of Technical Sciences of the University of Innsbruck has been renovated to the state of the art. In order to avoid overheating in summer automatic shading systems and automatic window openers were installed allowing night ventilation during the cooling period. To save lighting energy and to provide a constant lighting of the working surfaces of 500 Lx a light control system was installed in every room. The systems are centrally controlled by the building management system via KNX bus systems. Input for control logic is provided by a weather station at the top of the building.

Aims and Content of the Work

In the course of the ongoing FFG-research project “VisErgyControl” this control strategy will be examined according to energy and lighting efficiency requirements and user satisfaction. For this purpose, the control signals of the building control system and the KNX-signals for selected offices have to be evaluated. Additionally to the measured data of the temperature and illuminance sensors the blinds, lighting and window switch operations are evaluated by setting up a Matlab-routine.

In addition to this evaluation of a state of the art system, a new developed control strategy (based on Excel) within the research project will be tested and evaluated by several building simulation studies based on a representative floor plan of the University building modeled in SketchUp and TRNSYS. Therefore a coupling routine in Matlab between the Simulation software TRNSYS and the Excel control tool will be worked out. By simulating different case studies the advantages and potentials in terms of energy savings should be worked out as a major part of the master thesis.

The evaluation of the integrative energetically and daylight control strategy will be done by measurements on an outdoor façade test stand at the University within the project. The work of this master thesis also contributes in terms of optimization of the thermal model of the façade test stand (PASSYS-Cell) based on measured data from the calibration phase.