Abstract
The paper shows how the Design of the Experiments can be used to determine mathematical relations to estimate the maximum temperature reached by flammable materials at chimney-roof penetrations. Heat transfer between chimney and roof is simulated by means of an appropriate two-dimensional numerical model. This approach allows the analysis of a great number of cases that otherwise could not be analyzed experimentally. In particular, an insulated chimney of internal diameter of 200 mm passing through two different roofs representative of a great number of non-ventilated roofs is considered. Chimneys are considered with thicknesses between 20 mm and 120 mm and thermal conductivities of the insulating material between 0.03 W/m K and 0.28 W/m K. Wooden roofs are studied of thicknesses between 80 mm and 360 mm and made up of one insulating layer over one wooden layer and by one insulating layer between two wooden layers. Configurations with the chimney in contact with the roof, or with clearance of up to 120 mm were considered. Exhaust gas temperatures are studied covering all the classes of chimney considered by the European standards (from T80 and T600). The mathematical relations are also translated into tables to make them suitable for end-users. They are an effective tool to support chimney installers and producers for installations in conditions very different from those contemplated in the certification procedure.
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References
Dadone PN (2009) Analisi 00. Casi Verificatisi sul Territorio della Provincia di Brescia e Statistica delle Cause, Incendi tetto e Canne Fumarie conference proceedings, Brescia (in Italian)
Ministry of the Environment of Finland (2011) Finnish concern on fire safety risk due to CE marking of appliances fired by solid fuel and chimney products
Hakala VM (2013) Fire investigations, thematic investigation 3: chimney and fireplace as causes of fire, p 14 (in Finnish)
International Partnership for the Investigation of Fires, Explosions and other major incidents. www.burgoynes.com. Accessed 21 July 2015
EN 1859 (2013) Chimneys—metal chimneys—test methods, Milano
Neri M, Luscietti D, Fiorentino A, Pilotelli M (2015) Experimental analysis of chimneys in wooden roofs. Fire Technol 52:1939–1955. https://doi.org/10.1007/s10694-015-0525-7
Neri M, Luscietti D, Bani S, Fiorentino A, Pilotelli M (2015) Analysis of the temperatures measured in very thick and insulating roofs in the vicinity of a chimney. J Phys Conf Ser 655:012019. https://doi.org/10.1088/1742-6596/655/1/012019
Lantschner N (2009) La Mia Casa Clima, Raetia Edition, Bolzano (in Italian)
Leppänen P, Inha T, Pentti M (2015) An experimental study on the effect of design flue gas temperature on the fire safety of chimneys. Fire Technol 51:847–866. https://doi.org/10.1007/s10694-014-0415-4
Leppänen P, Neri M, Luscietti D, Bani S, Pentti M, Pilotelli M (2016) Comparison between European chimney test results and actual installations. J Fire Sci 35:62–79. https://doi.org/10.1177/0734904116680222
Neri M, Leppänen P, Bani S, Pentti M, Pilotelli M (2015) Experimental and computational study of the temperatures field around a chimney roof penetration. Fire Technol 52:1799–1823. https://doi.org/10.1007/s10694-015-0540-8
Neri M, Luscietti D, Bani S, Fiorentino A, Pilotelli M (2015) Chimneys in wooden roofs: a 3D steady numerical model for the prediction of the temperatures. In: Proceedings of the ASME-ATI-UIT 2015 conference paper, Napoli
Luscietti D, Pilotelli M (2012) Chimney in wood-frame houses: preliminary thermal analysis in relation to the fire hazard. In: Proceedings of the XXX UIT heat transfer conference, Bologna
Neri M, Luscietti D, Fiorentino A, Pilotelli M (2013) Study of the heat transfer between chimney and roof by means of design of experiments (DOE). In: Proceedings of the XXXI UIT heat transfer conference, Como
Neri M (2012) Canne Fumarie e Tetti in Legno: Influenza del Pacchetto Tetto in Relazione al Rischio Incendio. University of Brescia, Brescia (in Italian)
Montgomery DC (1984) Design and analysis of experiment. Wiley, New York
Stamatis DH (2002) Six Sigma and Beyond. Design of experiments. St. Lucie Press, Boca Raton
Neri M (2015) Experimental and numerical analysis of heat transfer in chimney roof penetration in relation to the overheating of flammable materials. University of Brescia (PhD Thesis)
Types of roofs. www.dataholz.it. Accessed 31 Oct 2016
Types of chimneys. http://www.schiedel.it. Accessed 31 Oct 2016
Leppänen P, Neri M, Mäkinen J (2015) Heat release caused by the smouldering combustion of the binder of rockwool. J Struct Mech 48:68–82
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Neri, M., Luscietti, D., Fiorentino, A. et al. Statistical Approach to Estimate the Temperature in Chimney Roof Penetration. Fire Technol 54, 395–417 (2018). https://doi.org/10.1007/s10694-017-0689-4
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DOI: https://doi.org/10.1007/s10694-017-0689-4