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Comparison of Airflow and Acoustic Measurements for Evaluation of Building Air Leakage Paths in a Laboratory Test Apparatus

Kölsch, Benedikt and Walker, Iain S. and Delp, William W. and Schiricke, Björn and Hoffschmidt, Bernhard (2022) Comparison of Airflow and Acoustic Measurements for Evaluation of Building Air Leakage Paths in a Laboratory Test Apparatus. 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

Unintended Infiltration in buildings is responsible for a significant portion of the global housing stock energy demand. Today, the fan pressurization method, also known as blower-door test, is the most frequently used measurement method to evaluate the airtightness of buildings and determining the total air change rate of a building or a building element. However, the localization and quantification of single leaks in the building envelope remain difficult and time-consuming. In this paper, an acoustic method is introduced to estimate the leakage size of single leaks in buildings. Sound transmission measurements and measurements of airflow have been conducted in a laboratory test apparatus. The objective of this investigation is to compare acoustic measurements with airflow measurements of leaks under the same boundary conditions. The test apparatus consists of two chambers, which are separated by a test wall. This test wall represents a single characteristic air leakage path in the building envelope. Various types of wall structures with different slit geometries, wall thicknesses and insulation materials have been investigated. The acoustic measurements have been performed with a sound source placed in one chamber and ultrasonic microphones located in both chambers. The results of the acoustic measurements were compared to airflows through the test wall measured using a flow nozzle to provide estimates of the uncertainty in the acoustic approach.

Item URL in elib:https://elib.dlr.de/189453/
Document Type:Conference or Workshop Item (Speech)
Title:Comparison of Airflow and Acoustic Measurements for Evaluation of Building Air Leakage Paths in a Laboratory Test Apparatus
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kölsch, BenediktUNSPECIFIEDhttps://orcid.org/0000-0003-3564-9822
Walker, Iain S.Lawrence Berkeley National Laboratoryhttps://orcid.org/0000-0001-9667-1797
Delp, William W.Lawrence Berkeley National Laboratoryhttps://orcid.org/0000-0002-6071-2187
Schiricke, BjörnUNSPECIFIEDhttps://orcid.org/0000-0003-0572-2048
Hoffschmidt, BernhardUNSPECIFIEDUNSPECIFIED
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:Airtightness, Buildings, Acoustics, Airflow
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 10:48
Last Modified:28 Oct 2022 10:48

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