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Reducing Wind Sensitivity for Blower Door Testing

Kölsch, Benedikt und Walker, Iain S. (2022) Reducing Wind Sensitivity for Blower Door Testing. In: Proceedings of the 41st AIVC - ASHRAE IAQ joint conference. 41st AIVC - ASHRAE IAQ joint conference, 2022-05-04 - 2022-05-06, Athen, Griechenland.

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Kurzfassung

The fan pressurization method is a common practice in many countries for measuring the air leakage of houses. The test results are sensitive to uncertainties in the measured pressures and airflows. In particular, changing wind conditions during a test result in some pressure stations having more or less uncertainty than others. Usually, it is necessary to fit the measured data to the power-law equation. Using the ordinary least square (OLS) fitting method, the pressure exponent and flow coefficient can be determined, and the reported data at high pressures can be extrapolated to small pressures where natural infiltration occurs. However, this fitting method neglects the existing of the uncertainty of these measurements, which may lead to errors in the prediction of flows at low pressures and therefore to unreliable input data for energy simulations. The weighted line of organic correlation (WLOC) takes the uncertainty at each pressure station into account and minimizes the fitting residuals for both pressure and flow. This paper shows the results of a statistical analysis of an extensive data set of over 7.400 fan pressurization test of six houses in 109 different leakage configurations. It was found that in over 90 % of the analyzed cases, WLOC enables a more reliable prediction of pressure exponent and flow coefficient at low pressure compared to OLS and appears to be a better fitting technique.

elib-URL des Eintrags:https://elib.dlr.de/189440/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Reducing Wind Sensitivity for Blower Door Testing
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Kölsch, Benediktbenedikt.koelsch (at) dlr.dehttps://orcid.org/0000-0003-3564-9822NICHT SPEZIFIZIERT
Walker, Iain S.Lawrence Berkeley National Laboratoryhttps://orcid.org/0000-0001-9667-1797NICHT SPEZIFIZIERT
Datum:Mai 2022
Erschienen in:Proceedings of the 41st AIVC - ASHRAE IAQ joint conference
Referierte Publikation:Nein
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Luftdichtheit, Gebäude, Blower Door
Veranstaltungstitel:41st AIVC - ASHRAE IAQ joint conference
Veranstaltungsort:Athen, Griechenland
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:4 Mai 2022
Veranstaltungsende:6 Mai 2022
Veranstalter :American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
HGF - Forschungsbereich:Energie
HGF - Programm:Materialien und Technologien für die Energiewende
HGF - Programmthema:Thermische Hochtemperaturtechnologien
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SW - Solar- und Windenergie
DLR - Teilgebiet (Projekt, Vorhaben):E - Condition Monitoring
Standort: Jülich , Köln-Porz
Institute & Einrichtungen:Institut für Solarforschung > Qualifizierung
Hinterlegt von: Kölsch, Dr.-Ing. Benedikt
Hinterlegt am:28 Okt 2022 10:46
Letzte Änderung:24 Apr 2024 20:50

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