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On Measuring Air Infiltration Rates Using Tracer Gases in Buildings with Presence Controlled Mechanical Ventilation Systems
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Environmental engineering. (Inomhusmiljö, Kemi, Miljöteknik)ORCID iD: 0000-0002-8985-2562
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.ORCID iD: 0000-0001-9076-0801
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.ORCID iD: 0000-0002-5822-4838
2016 (English)In: Indoor Air 2016: The 14th International Conference of Indoor Air Quality and Climate, July 3-8 2016, Ghent, Belgium: Conference Proceedings / [ed] E. Van Kenhove, J. Laverge, P. De Vlieger, ISIAQ , 2016, 875Conference paper (Refereed)
Abstract [en]

The ventilation and air leakage of a school building was investigated. Information was collected from the parameters of the mechanical ventilation system and from measurements of the local mean age of air using the homogeneous emission method. While the average local mean ages of air can be accurately measured by passive integrative samplers, the estimation of the average room specific air change rate by taking the inverse of the measured average local mean age of air did not give correct results. The main problem is that integrative sampling represents a linear averaging process that is inappropriate to capture the average of nonlinearly related properties. This problem is accentuated when the ventilation rates for different periods differ a lot. A simple computational model was developed to discuss the system behavior. A partial solution to the measurement problem is to actively sample the different populations of air change rates separately.

Place, publisher, year, edition, pages
ISIAQ , 2016. 875
Keyword [en]
air infiltration, local mean age of air, room specific ventilation rate, ACH
National Category
Environmental Analysis and Construction Information Technology
Identifiers
URN: urn:nbn:se:hig:diva-22676ISBN: 978-0-9846855-5-4OAI: oai:DiVA.org:hig-22676DiVA: diva2:1045980
Conference
Indoor Air 2016, 14th International Conference of Indoor Air Quality and Climate, Ghent, Belgium, 3-8 July 2016
Available from: 2016-11-11 Created: 2016-10-28 Last updated: 2016-11-14Bibliographically approved

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