Analysis of a new plate thermometer: the copper disc plate thermometer
2015 (English)In: Proceedings of the International Fire Safety Symposium 2015: Coimbra, Portugal, 20th-22nd April 2015 / [ed] João Paulo C Rodrigues, International Fire Safety Symposium , 2015, 453-460 p.Conference paper (Refereed)
Two temperatures govern heat transfer to a surface of a solid body. One is the gas temperature which can be measured with thermocouples (TC) and the other the black body radiation temperature. The latter can also be expressed as the incident radiant heat flux. It is difficult to measure as radiometers cannot be used under hot fire conditions. Indirectly the radiation temperature can be obtained by measuring the Adiabatic Surface Temperature (AST) with plate thermometers (PT) for example as defined in the fire resistance furnace standards EN 1363-1 and ISO-834-1 combined with measurements of gas temperature with thin TC. In the test reported here a smaller gauge is used to measure adiabatic surface temperature at surfaces. It has been named copper disc Plate Thermometer (cdPT). Then a thin copper disc with an attached TC is mounted flush at the surface to obtain the AST in e.g. cone calorimeters according to ISO 5660. A main advantage of the cdPT is that it can record the AST before as well after a material has ignited. It can thereby be used to indicate ignition as well as continue recording the thermal exposure thereafter when ignition occurs the cdPT reacts immediately by displaying a quick temperature rise.
Place, publisher, year, edition, pages
International Fire Safety Symposium , 2015. 453-460 p.
Research subject Steel Structures
IdentifiersURN: urn:nbn:se:ltu:diva-31849Local ID: 627ae436-bebe-4e8d-a32a-f3aa18fcb34dOAI: oai:DiVA.org:ltu-31849DiVA: diva2:1005083
International Fire Safety Symposium : 20/04/2015 - 22/04/2015
Godkänd; 2015; 20160823 (alebys)2016-09-302016-09-30Bibliographically approved