Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Temperature calculations in fire exposed structures with the use of adiabatic surface temperatures
2008 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Fire safety engineering is offering more and more advanced methods including software for fire dynamic calculations. This thesis presents a method for using the results obtained by fire modelling using the code FDS (Fire Dynamic Simulator) as input to FEM calculations for predicting temperature in fire exposed structures. Prof. Wickström of SP - Swedish National Testing and Research Institute has introduced the concept of adiabatic surface temperature (AST) for calculating heat transfer to fire exposed structures. The AST is defined as the temperature of a surface which cannot absorb any energy. It may be calculated at any surface in the fire simulation software used in this thesis. The aim in this work is to see if the AST at the surface of a beam in one simulation gives satisfactory temperature result when used in a temperature calculation of beams with different dimensions. The work is divided into four parts. The first part is to validate the AST as a means for calculations of temperature in fire exposed structures. Using the AST in the calculations presented an almost perfect agreement with the temperature obtained directly from the CFD code. The second part is a comparison made to investigate whether AST calculated by FDS could be used in a FEM simulation to predict heat transfer to a fire exposed structure. As the third part some different simulations are run to compare the FEM temperature calculations of beams with AST from different simulations. The result showed that AST obtained in one fire scenario can be used for different beam sections. It is advised to use the technique with care since certain circumstances such as choice of convection coefficients and flame height can influence the results. The final part is to make an experimentally verifiable set up. This is made to be able to compare simulated results with tests to be made at SP and at ULC (Underwriters’ Laboratories of Canada).

Place, publisher, year, edition, pages
2008.
Keyword [en]
Technology, Adiabatic surface temperature, Heat transfer, Temperature, calculations, FDS, TASEF, Fire exposure
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-42649ISRN: LTU-EX--08/049--SELocal ID: 0a22a813-e6fd-4fcd-91ed-7cc525009229OAI: oai:DiVA.org:ltu-42649DiVA: diva2:1015872
Subject / course
Student thesis, at least 30 credits
Educational program
Fire Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(762 kB)489 downloads
File information
File name FULLTEXT01.pdfFile size 762 kBChecksum SHA-512
f78e23b220fda22ed10f76f58840245b7628c738f96ff896ae33a1784c7f13609060c153f4480961ecddd2ce91cca6656afbb29462ac3902c391ad9150927056
Type fulltextMimetype application/pdf

Search outside of DiVA

GoogleGoogle Scholar
Total: 489 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 54 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf