TY - CONF A1 - Ferrero, Fabio A1 - Kluge, Martin A1 - Kreißig, Michael A1 - Schmidtchen, Ulrich A1 - Holtappels, Kai T1 - Prevention of the explosion of acetylene cylinders involved in fire: experiments and simulations T2 - 23rd ICDERS 2011 N2 - In order to assess the effectiveness of water cooling of acetylene cylinders involved in fire, a total of 13 bonfire tests with 8.9-, 10 and 50-l-cylinders were performed. During the experiments the pressure in the cylinder and the temperature at different locations within the porous material and on the Shell surface as well as the flame temperature were measured. Overall 8 burst tests were performed, in order to determine the times to explosion for the cylinders. Cylinders failed not later than 15 minutes from the ignition of the bonfire, often with generation of a fireball. During the other 5 tests, the fire was extinguished before the expected burst and the cylinder was cooled with water. In 2 of the 5 extinction experiments, the explosion of the cylinder could be prevented. Noticeably, in one case the on-set of the decomposition of acetylene had already been observed, before the cooling was started. In spite of that, the cooling was still effective. The interpretation of the current results and of the data from previous tests with 40-l-cylinder suggests that single acetylene cylinders involved in fire might be saved by cooling, if their pressure does not exceed a value of about 45 bara. The recorded values of pressure and temperature were used to develop and validate a mathematical model for the prediction of the heat transfer in acetylene cylinders during the exposure to fire and the afterward cooling. The predictions agreed well with the experimental results. T2 - 23rd ICDERS 2011 CY - Irvine, CA, USA DA - 24.07.2011 KW - Acetylene KW - Gas cylinders KW - Fire exposure KW - Decomposition PY - 2011 N1 - Geburtsname von Kluge, Martin: Beckmann-Kluge, M. - Birth name of Kluge, Martin: Beckmann-Kluge, M. IS - Paper 132 SP - 1 EP - 6 AN - OPUS4-24153 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -