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Improved Version of Cone Tools for Predictions of Room Corner Tests
2011 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Room Corner Test (ISO 9705) is used for classification of surface materials and as a reference scenario for a number of countries, such as the European Single Burning Item test. Due to the cost of a Room Corner Test it is of interest to predict the course of the test before it is performed. By using the model from Wickström and Göransson, which use the time to ignition and the complete heat release rate from a Cone Calorimeter test (ISO 5660), it is possible to predict a Room Corner Test quite good. However, because of the complexity of the model there has been a need for a program which simplifies the use of the model. The program is called Cone Tools and has been used in the process of the work. The aim of the report was to simplify the equation system of the burning area in Cone Tools and, if possible, improve it. Tests were also performed to see whether the correction factor in Cone Tools could be improved. The burning area equations have been done linear to simplify the system. All tests were conducted in Cone Tools 3.2.1 which has been recoded by the use of Visual Basic. The current and the modified model were compared against nine different products heat release rate curve to see which model that makes the best prediction. The result was very interesting were the modified model did better or as good prediction in most cases compared to the current model. Some products, such as Plywood and FR ESP, were predicted very well by the modified model. The correction factor between different irradiance levels in Cone Tools is very crude and it is therefore of interest to improve it. This was done by using the same quadratic expression, as in Cone Tools 3.2.1, but taking the heat loss from the surface into account. The result showed that the current correction factor gave a better translation when comparing them against different products. Nine tests are quite few to determine if the modified model will work for a large number of diverse products. Therefore, more test needs to be performed before the modified can be accepted as a new and improved model. This is however a good start and shows that it is possible to improve predictions of a Room Corner Test.

Place, publisher, year, edition, pages
Keyword [en]
Keyword [sv]
Teknik, Room Corner Test, Cone calorimeter, Cone Tools, Burning area, CC, RCT
URN: urn:nbn:se:ltu:diva-55850Local ID: ca9531f6-b2bb-498a-be22-197a495291b1OAI: diva2:1029234
Subject / course
Student thesis, at least 30 credits
Educational program
Fire Engineering, master's level
Validerat; 20110617 (anonymous)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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