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Fan pressurization method for measuring air leakage in churches – wind and stack induced uncertainties
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering. (Indoor environment)ORCID iD: 0000-0002-0337-8004
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering. (Indoor environment)
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering.
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2013 (English)In: Conference proceedings: Cultural heritage preservation – 3rd European Workshop on Cultural Heritage Preservation / [ed] A. Troi and E. Luchi., 2013, 63-68 p.Conference paper, Published paper (Refereed)
Abstract [en]

The air leakage of the building envelope of ancient churches and other historical and monumental buildings has impact on energy consumption, thermal comfort, humidity and indoor surface soiling. To measure the air leakage in such large and naturally ventilated single-zone buildings is however challenging, especially due to wind and buoyancy (stack) induced disturbances. This study describes experiences in this regard, attainedat field tests where the fan pressurization technique (“Blower door”) was employed. Reference is made to the European test standard EN 13829. Also results of wind-tunnel tests are utilized. It is shown that both buoyancy and wind at commonly occurring conditions can cause significant uncertainty in fan pressurization tests, and that some of the directions in the standard might need to be strengthened or amended. While the uncertainty in measured air leakage rate at the standard (high) pressure of 50 Pa may be small, the predictions of the air leakage rate occurring at realistically (low) indoor-outdoor pressures tend to suffer from significant uncertainty. That uncertainty is then conveyed to later utilizations of the test results, e.g. building energy modeling and prediction. It is also shown that the wind induced pressure at buildings like churches extends a considerable way out into the surroundings of the building; in the order of two times the building height. This has particular importance when choosing a reference point for outdoorpressure measurement.

Place, publisher, year, edition, pages
2013. 63-68 p.
Keyword [en]
Fan pressurization, Blower door, Large buildings, Churches, Wind effects, Stack effects
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:hig:diva-15409ISBN: 978-88-88307-26-8 (print)OAI: oai:DiVA.org:hig-15409DiVA: diva2:650929
Conference
Cultural heritage preservation – 3rd European Workshop on Cultural Heritage Preservation (EWCHP), Bozen, Italy, September 16-17, 2013
Projects
Church project
Funder
Swedish Energy Agency, 2011-002440
Available from: 2013-09-24 Created: 2013-09-24 Last updated: 2013-09-24Bibliographically approved

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Mattsson, MagnusSandberg, MatsClaesson, LeifLindström, SvanteHayati, Abolfazl
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