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Ignition Temperatures of MDF-board and PMMA: Measurements and Numerical Calculations
2014 (English)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The ignition temperature for a material is not clearly defined throughout the fire-research community. To search for the ignition temperature of for example wood would give you different answers from different sources. This is due to different methods of calculations and measurements. In this report experimental test, computer calculations, and by hand direct calculations of the ignition temperature of MDF-board and PMMA have been conducted. MDFboardis a wood fiber based building material that is produced through pressing wood fibers and adhesives together. PMMA, or Polymethylmetacrylat is (more commonly known as Plexiglas) a plastic material with properties similar to glass, but not as fragile. The computer calculations using the TASEF code and the hand-based direct calculations using equations from Wickström (2014) in this thesis gave similar surface temperatures at time of ignition as found in literature. Comparisons with experiments indicate that the surface temperature at the time of ignition depends on the level of heat flux affecting the material. A high level of heat flux will give a higher surface temperature than a low level of heat flux. Further investigations at a small depth under the materials surfaces gave interesting temperatures. At a specific, small depth, the temperatures of the materials subjected to incident radiation heat are quite stable and not dependent on the magnitude of the radiation. This could mean that the temperature at a small depth into the material gives a more exact and usable ignition temperature for these two materials.

Place, publisher, year, edition, pages
2014. , 40 p.
Keyword [en]
Keyword [sv]
Teknik, Antändningstemperatur, MDF, PMMA, Konkalorimeter, Värmestrålning
URN: urn:nbn:se:ltu:diva-42531Local ID: 087e34eb-4649-4eb6-b9b0-f4fcde9fccb5OAI: diva2:1015754
Subject / course
Student thesis, at least 15 credits
Educational program
Fire Protection Engineer, bachelor's level
Validerat; 20140911 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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Hultberg, Gustav

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