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Detection of Air Leakage in Building Envelopes Using Ultrasound Technology

Kölsch, Benedikt and Tiddens, Arne and Estevam Schmiedt, Jacob and Schiricke, Björn and Hoffschmidt, Bernhard (2019) Detection of Air Leakage in Building Envelopes Using Ultrasound Technology. In: Whole Building Air Leakage: Testing and Bulding Performance Impacts, pp. 160-183. Symposiom on Whole Building Air Leakage: Testing and Buílding Perfrmance Impacts, 8. - 9. April 2018, San Diego, USA. DOI: 10.1520/STP161520180022

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Official URL: https://www.astm.org/DIGITAL_LIBRARY/STP/PAGES/STP161520180022.htm

Abstract

Heating energy represents a significant proportion of the total energy consumption of theFederal Republic of Germany. Thus, a reduction of heating energy demand in buildings is one of the central points of German energy saving and climate goals. Considering that the current rate of new building construction is approximately 1 %, the most significant energy saving potential lies in existing buildings. The analysis of existing buildings will thus become more important in the years to come. As a result, the development of new measurement systems to assess the need for renovation is required. In this context, detailed Information about heat insulation and airtightness is essential. The current approaches to detect air leakage in building envelopes are mostly time consuming and expensive. Therefore, the development of an advanced and more inexpensive method is a vital step. In this paper, we2 present a study about the feasibility and suitability of ultrasound technology to evaluate the size of air leakages in building envelopes. The advantage of ultrasound technology is that the corresponding wavelengths are small enough to penetrate small openings and that disturbing background noise is usually low. Moreover, the frequencies are above the human threshold of hearing; hence, working and living inside the building would be affected less by the measurement than by a blower door test or leakage detection with audible sound. To examine the suitability of this technology, we use an experimental setup of ultrasound microphones and a speaker in a test chamber. Within this setup, we measured different hole sizes and assessed whether they could be detected using ultrasonic frequency swept signals.

Item URL in elib:https://elib.dlr.de/130037/
Document Type:Conference or Workshop Item (Speech)
Title:Detection of Air Leakage in Building Envelopes Using Ultrasound Technology
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kölsch, Benediktbenedikt.koelsch (at) dlr.deUNSPECIFIED
Tiddens, Arnearne.tiddens (at) dlr.dehttps://orcid.org/0000-0003-3714-3008
Estevam Schmiedt, JacobJacob.EstevamSchmiedt (at) dlr.dehttps://orcid.org/0000-0002-0794-6769
Schiricke, BjörnBjoern.Schiricke (at) dlr.dehttps://orcid.org/0000-0003-0572-2048
Hoffschmidt, BernhardBernhard.Hoffschmidt (at) dlr.deUNSPECIFIED
Date:2019
Journal or Publication Title:Whole Building Air Leakage: Testing and Bulding Performance Impacts
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1520/STP161520180022
Page Range:pp. 160-183
Editors:
EditorsEmail
Weston, T.UNSPECIFIED
Nelson, K.UNSPECIFIED
Wissink, K.UNSPECIFIED
Status:Published
Keywords:air leakage, ultrasound, leakage size, acoustics, frequency sweep, building envelope, energy performance, Huang-Hilbert transformation
Event Title:Symposiom on Whole Building Air Leakage: Testing and Buílding Perfrmance Impacts
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:8. - 9. April 2018
Organizer:ASTM Committee
HGF - Research field:Energy
HGF - Program:Energy Efficiency, Materials and Resources
HGF - Program Themes:Methods and Concepts for Materials Development
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for Energy Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualification
Deposited By: Kruschinski, Anja
Deposited On:20 Nov 2019 15:19
Last Modified:30 Dec 2019 15:38

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