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Distribution of carbon dioxide in a naturally ventilated room with high internal heat load

: Steiger, S.; Hellwig, R.; Junker, E.

Strøm-Tejsen, P. ; International Society of Indoor Air Quality and Climate -ISIAQ-, Ottawa:
Indoor Air 2008, the 11th International Conference on Indoor Air Quality and Climate. CD-ROM : 17th August to 22nd August 2008, Copenhagen, Denmark
Lyngby: Technical University of Denmark, Department of Manufacturing Engineering and Management, 2008
ISBN: 978-87-7877-270-1
Paper 397, 7 pp.
International Conference on Indoor Air Quality and Climate <11, 2008, Copenhagen>
Conference Paper
Fraunhofer IBP ()

The paper shows results of measuring the carbon dioxide distribution in a test room with natural ventilation and high occupant density. The measurements were carried out to see the characteristics of carbon dioxide and indoor air flow and also to find possible measuring positions for carbon dioxide sensors to control indoor air quality. The distribution of the carbon dioxide was influenced by several issues, the disposal of carbon dioxide, the status of the window and the heat emission of the dummies. With an open window and carbon dioxide emitted, the concentration of the gas varied in a wide range over the room. The highest concentrations were measured below the ceiling, the lowest above the floor, but there was not always a stable stratification. Near the window high fluctuations of the carbon dioxide concentration appeared. The measured values near the wall were also more stable than the values in the middle of the room but comparable to them. Therefore appropriate measuring points for this kind of rooms could be at the wall at breathing height with an adequate distance from the windows.