Thermal analysis of a pool fire test in a steel container

• Published in: Journal of fire sciences 2012-03, Vol.30 (2), p.170-184
• Main Authors: Cheng, Xudong, Byström, Alexandra, Wickström, Ulf, Veljkovic, Milan
• Format: Article
• Language: English
• Subjects: Applied sciences; Building structure; Building technical equipments; Buildings; Buildings. Public works; Construction (buildings and works); Exact sciences and technology; Fire behavior of materials and structures; Fire protection; Metal structure; Steel Structures; Stålbyggnad
• ISSN: 0734-9041; 1530-8049; 1530-8049
• DOI: 10.1177/0734904111432834

A pool fire test was conducted in an uninsulated steel container under low ambient temperature condition, at −20°C. The heat balance of the enclosure fire was analyzed. The size of the container was 12 m× 2.4 m and 2.4 m high, and it was made of 3-mm-thick steel. During the fire test, the fuel mass loss rate was recorded and the temperatures at different positions were measured with high-temperature thermocouples and plate thermometers. The fire scenario was simulated by using fire dynamics simulator software, and the simulated and measured results were compared. The coarse high-temperature thermocouple responded slower, and therefore, temperature measured by the high-temperature thermocouple was corrected to eliminate the effect of the thermal inertia. Furthermore, a simple two-zone model was proposed for estimating gas temperature in the enclosure of the highly conductive steel walls assuming a constant combustion rate. The convective and radiative heat transfer resistances at the inside and outside surfaces of the enclosure were analyzed.