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K. Eder, H. Konder, T. Bednar:
"Effect of different façade systems on the cooling capacity of a cooled ceiling - Tracer gas measurement of the air flow";
Vortrag: 10th Nordic Symposium on Building Physics, Lund, Sweden; 15.06.2014 - 19.06.2014; in: "NSB 2014,10th Nordic Symposium on Building Physics", Grafisk gruppen AB, (2014), ISBN: 978-91-88722-53-9; Paper-Nr. 5, 8 S.

The aim of the work is to clarify how the façade system and the cooling ceiling impacts the air movement within a room. Therefore tracer gas measurements with different inject locations and different room set-ups were done. One part of the results show the impact of different façade systems - a single skin façade and a single
storey double skin façade - on the air movement. The measurements show an increase of concentration within the ceiling zone which is attributed to a higher air flow rate over the ceiling.
Furthermore different set ups of the cooling ceilings were measured - one with natural ventilation over the suspended cooling ceiling and one without natural ventilation. The measurement results
show that there is a decrease of concentration due to missing natural ventilation. The measurement results show a clear difference in the rate of concentration on different room points due to solar radiation, the location of impact and the room set up.

Air flow, tracer gas measurement, comfort, façade systems, cooling ceiling, cooling capacity