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Smoke control in tunnels: ventilation using mobile fans
Mälardalen University, Department of Public Technology.ORCID iD: 0000-0002-9598-0958
2005 (English)Licentiate thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Institutionen för Samhällsteknik , 2005. , 85 p.
Series
Mälardalen University Press Licentiate Theses, ISSN 1651-9256 ; 53
National Category
Engineering and Technology
Research subject
Energi- och miljöteknik
Identifiers
URN: urn:nbn:se:mdh:diva-25ISBN: 91-88834-77-8 (print)OAI: oai:DiVA.org:mdh-25DiVA: diva2:120714
Presentation
2005-09-02, Beta, 13:15
Opponent
Supervisors
Available from: 2005-09-01 Created: 2005-09-01 Last updated: 2013-12-04
List of papers
1. Can combinations of small fans be used for smoke evacuation in tunnels?
Open this publication in new window or tab >>Can combinations of small fans be used for smoke evacuation in tunnels?
2004 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents an overview of recent tests performed in the Masthamn and Stadsgard tunnels in Sweden. The aim of the tests was to investigate if combinations of smaller fans could be used for smoke control in tunnels. The systems possibilities and limitations are discussed and improving measures evaluated. The tests show that combinations of ordinary PPV fans can be used in moderate length single track rail tunnels if a tunnel cover to avoid short circuit over the fans is used. In shorter tunnels or with no counteracting wind the fans can be used without the cover.

Keyword
Tunnel Fire Mobile fans Rescue operations
National Category
Other Engineering and Technologies
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-4090 (URN)
Conference
Safety in Infrastructure, Budapest 20th-21st October 2004
Available from: 2005-09-01 Created: 2005-09-01 Last updated: 2016-01-11Bibliographically approved
2. Entrainment in a free jet generated by Positive Pressure Ventilator
Open this publication in new window or tab >>Entrainment in a free jet generated by Positive Pressure Ventilator
2014 (English)In: Fire technology, ISSN 0015-2684, E-ISSN 1572-8099, no 6, 1499-1515 p.Article in journal (Refereed) Published
Abstract [en]

Results of a simple flow model to describe the entrainment into the air cone created by a positive pressure ventilator (PPV) fan are compared to experimental data. Velocity profiles measured in the air cone of a conventional PPV ventilator are used. The entrainment coefficient and the cone angle were determined for the fan investigated. The correspondence between calculated and measured values is discussed and disparities explained. The findings from the tests are turned into practical guidance for the fire brigade and the advantages and limitations of the simplified model are discussed.

Keyword
Entrainment coefficients; Fire brigade; Flow model; Measured values; Positive pressure; Practical guidance; Velocity profiles; Ventilator
National Category
Applied Mechanics
Identifiers
urn:nbn:se:mdh:diva-4091 (URN)10.1007/s10694-013-0331-z (DOI)000343721200010 ()2-s2.0-84921069373 (Scopus ID)
Available from: 2005-09-01 Created: 2005-09-01 Last updated: 2016-12-22Bibliographically approved
3. The impact from outside wind on air movments in a telecom tunnel
Open this publication in new window or tab >>The impact from outside wind on air movments in a telecom tunnel
2005 (English)In: The impact from outside wind on air movements in a telecom tunnelArticle in journal (Refereed) Submitted
Identifiers
urn:nbn:se:mdh:diva-4092 (URN)
Available from: 2005-09-01 Created: 2005-09-01 Last updated: 2015-07-02Bibliographically approved
4. Tunneltäckning för effektivare brandventilation
Open this publication in new window or tab >>Tunneltäckning för effektivare brandventilation
2005 (Swedish)Patent (Other (popular science, discussion, etc.))
Keyword
Tunnel, brand, ventilation
National Category
Other Engineering and Technologies
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-4093 (URN)
Patent
SE 0402565-2
Available from: 2005-09-01 Created: 2005-09-01 Last updated: 2016-01-11Bibliographically approved
5. Kan mobila fläktar användas för brandgasevakuering i tunnlar?
Open this publication in new window or tab >>Kan mobila fläktar användas för brandgasevakuering i tunnlar?
2005 (Swedish)In: VVS-tidningen Energi & Miljö, no 5, 56-58 p.Article in journal (Other (popular science, discussion, etc.)) Published
Abstract [sv]

Då behovet att minska transportavstånd och att utnyttja mark till bebyggelse i stadsmiljö hela tiden ökar byggs idag fler och fler tunnlar och överbyggda anläggningar. Tunnlar har också en lång livslängd och används ofta under ett hundratal år. Detta innebär att det idag finns en mängd tunnlar som ännu används, men är byggda efter den standard som var aktuell vid tiden för byggnationen. Fasta ventilationssystem är inte heller en självklarhet i alla nybyggda tunnlar.

Längre vägtunnlar har oftast fasta ventilationssystem inbyggda eftersom de avgaser som bilarna släpper ut också i normalfallet behöver ventileras bort. Sådana ventilationssystem kan också användas för att styra brandgaserna – brandröken - i händelse av en brand. Spårtunnlar, kortare vägtunnlar och distributionstunnlar för kablar eller rör saknar ofta fasta system för ventilation. Spårtunnlarna ventileras genom kolvverkan när tågen kör igenom tunneln och trycker luften framför sig, medan distributionstunnlarna ofta inte behöver ventileras eftersom människor normalt inte befinner sig i tunneln.

Keyword
Tunnel, Brand, Mobila fläktar
National Category
Engineering and Technology
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-4094 (URN)
Available from: 2005-09-01 Created: 2005-09-01 Last updated: 2013-12-04Bibliographically approved

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