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Reducing Wind Sensitivity for Blower Door Testing

Kölsch, Benedikt and 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, 04.-06. Mai 2022, Athen, Griechenland.

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Abstract

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.

Item URL in elib:https://elib.dlr.de/189440/
Document Type:Conference or Workshop Item (Speech)
Title:Reducing Wind Sensitivity for Blower Door Testing
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kölsch, Benediktbenedikt.koelsch (at) dlr.dehttps://orcid.org/0000-0003-3564-9822
Walker, Iain S.Lawrence Berkeley National Laboratoryhttps://orcid.org/0000-0001-9667-1797
Date:May 2022
Journal or Publication Title:Proceedings of the 41st AIVC - ASHRAE IAQ joint conference
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Luftdichtheit, Gebäude, Blower Door
Event Title:41st AIVC - ASHRAE IAQ joint conference
Event Location:Athen, Griechenland
Event Type:international Conference
Event Dates:04.-06. Mai 2022
Organizer:American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Condition Monitoring
Location: Jülich , Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualifizierung
Deposited By: Kölsch, Dr.-Ing. Benedikt
Deposited On:28 Oct 2022 10:46
Last Modified:28 Oct 2022 10:46

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