Pressure transient identification of depleted appliance trap seals: a sinusoidal wave technique
Identifieur interne : 000769 ( Istex/Curation ); précédent : 000768; suivant : 000770Pressure transient identification of depleted appliance trap seals: a sinusoidal wave technique
Auteurs : Da Kelly [Royaume-Uni] ; Ja Swaffield [Royaume-Uni] ; Lb Jack [Royaume-Uni] ; Dp Campbell [Royaume-Uni] ; M. Gormley [Royaume-Uni]Source :
- Building Services Engineering Research & Technology [ 0143-6244 ] ; 2008-08.
English descriptors
- Teeft :
- Airnet, Airnet model, Amoy gardens housing, Appliance, Appliance side, Appliance trap seal, Appliance trap seal identification, Appliance trap seals, Blockage, Building drainage, Building drainage system, Building drainage systems, Building serv, Compliance, Compliance factor, Compliance factor matrix, Correct system condition, Cumulative compliance factor, Database, Database traces, Defect, Defective trap seals, Double defects, Drainage system, Eigenfrequency shifts, Excitation, Facility managers, Failure condition, Frequency domain, Frequency pressure, Fundamental frequencies, Fundamental frequency, Fundamental wavelength, Hong kong, Incident wave, Infection spread, Kelly, Laboratory data, Laboratory evaluation, Laboratory test, Maintenance regime, Methodology, Monitoring station, Mspdf msptest, Negative pressure, Negative reflection, Numerical model, Open finger hole, Open hole, Open trap, Open trap increases, Open trap seal, Pipe length, Pipe period, Piping systems, Piston stroke, Positive reflection, Pressure pulse, Pressure transducer, Pulse generator, Resultant pressure response, Sars epidemic, Seal, Single defect, Single defect traces, Single pulse, Sinusoidal, Sinusoidal pressure wave, System boundary, System condition, System conditions, System response, System side, System status, Test system response, Test trace, Time domain, Transient, Transient response, Trap, Trap displacement, Trap displacement modelling, Trap seal, Trap seal displacement, Trap seal water, Trap seals, Vent system, Water gauge, Wave propagation speed.
Abstract
Depleted appliance trap seals were shown to be a causal factor in the spread of the SARS virus at the Amoy Gardens housing complex in Hong Kong in 2003. This serious health risk has emphasised the requirement for an effective maintenance regime to ensure trap seals do not again facilitate the spread of infection and disease. This paper introduces a remote and non-invasive technique to identify depleted trap seals through analysis of the system response to an applied sinusoidal pressure wave. The pressure signal will be analysed in both the time domain and the frequency domain to determine system status. Results obtained from laboratory experiments will be used to confirm the practicality of this technique while a Method of Characteristic based numerical model will validate the methodology. Practical application: The transients generated within the building drainage system as a result of normal system operation continue to pose a threat to the integrity of the appliance trap seal. The technique outlined in this paper will help to quickly identify defective trap seals to ensure that cross-contamination is minimised. However, it is important that this transient-based technique does not itself introduce an additional risk to trap integrity. A sinusoidal pressure wave offers a completely non-invasive testing option that will not only be of great advantage to facility managers but also to the building users due to the reduced risk of cross-contamination.
Url:
DOI: 10.1177/0143624408091321
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Gormley</name><affiliation wicri:level="1"><mods:affiliation>Drainage Research Group, School of the Built Environment, Heriot-Watt University, Edinburgh, UK</mods:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Drainage Research Group, School of the Built Environment, Heriot-Watt University, Edinburgh</wicri:regionArea></affiliation></author></analytic><monogr></monogr><series><title level="j">Building Services Engineering Research & Technology</title><idno type="ISSN">0143-6244</idno><idno type="eISSN">1477-0849</idno><imprint><publisher>SAGE Publications</publisher><pubPlace>Sage UK: London, England</pubPlace><date type="published" when="2008-08">2008-08</date><biblScope unit="volume">29</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="219">219</biblScope><biblScope unit="page" to="232">232</biblScope></imprint><idno type="ISSN">0143-6244</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0143-6244</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Airnet</term><term>Airnet model</term><term>Amoy gardens housing</term><term>Appliance</term><term>Appliance side</term><term>Appliance trap seal</term><term>Appliance trap seal identification</term><term>Appliance trap seals</term><term>Blockage</term><term>Building drainage</term><term>Building drainage system</term><term>Building drainage systems</term><term>Building serv</term><term>Compliance</term><term>Compliance factor</term><term>Compliance factor matrix</term><term>Correct system condition</term><term>Cumulative compliance factor</term><term>Database</term><term>Database traces</term><term>Defect</term><term>Defective trap seals</term><term>Double defects</term><term>Drainage system</term><term>Eigenfrequency shifts</term><term>Excitation</term><term>Facility managers</term><term>Failure condition</term><term>Frequency domain</term><term>Frequency pressure</term><term>Fundamental frequencies</term><term>Fundamental frequency</term><term>Fundamental wavelength</term><term>Hong kong</term><term>Incident wave</term><term>Infection spread</term><term>Kelly</term><term>Laboratory data</term><term>Laboratory evaluation</term><term>Laboratory test</term><term>Maintenance regime</term><term>Methodology</term><term>Monitoring station</term><term>Mspdf msptest</term><term>Negative pressure</term><term>Negative reflection</term><term>Numerical model</term><term>Open finger hole</term><term>Open hole</term><term>Open trap</term><term>Open trap increases</term><term>Open trap seal</term><term>Pipe length</term><term>Pipe period</term><term>Piping systems</term><term>Piston stroke</term><term>Positive reflection</term><term>Pressure pulse</term><term>Pressure transducer</term><term>Pulse generator</term><term>Resultant pressure response</term><term>Sars epidemic</term><term>Seal</term><term>Single defect</term><term>Single defect traces</term><term>Single pulse</term><term>Sinusoidal</term><term>Sinusoidal pressure wave</term><term>System boundary</term><term>System condition</term><term>System conditions</term><term>System response</term><term>System side</term><term>System status</term><term>Test system response</term><term>Test trace</term><term>Time domain</term><term>Transient</term><term>Transient response</term><term>Trap</term><term>Trap displacement</term><term>Trap displacement modelling</term><term>Trap seal</term><term>Trap seal displacement</term><term>Trap seal water</term><term>Trap seals</term><term>Vent system</term><term>Water gauge</term><term>Wave propagation speed</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Depleted appliance trap seals were shown to be a causal factor in the spread of the SARS virus at the Amoy Gardens housing complex in Hong Kong in 2003. This serious health risk has emphasised the requirement for an effective maintenance regime to ensure trap seals do not again facilitate the spread of infection and disease. This paper introduces a remote and non-invasive technique to identify depleted trap seals through analysis of the system response to an applied sinusoidal pressure wave. The pressure signal will be analysed in both the time domain and the frequency domain to determine system status. Results obtained from laboratory experiments will be used to confirm the practicality of this technique while a Method of Characteristic based numerical model will validate the methodology. Practical application: The transients generated within the building drainage system as a result of normal system operation continue to pose a threat to the integrity of the appliance trap seal. The technique outlined in this paper will help to quickly identify defective trap seals to ensure that cross-contamination is minimised. However, it is important that this transient-based technique does not itself introduce an additional risk to trap integrity. A sinusoidal pressure wave offers a completely non-invasive testing option that will not only be of great advantage to facility managers but also to the building users due to the reduced risk of cross-contamination.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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