Temperature Response of Water Cooled Hollow Columns and BEAMS During Hydrocarbon Fire

摘要

The maximum wall temperatures of water cooled hollow steel columns and beams exposed to heat load from hydrocarbon fire is calculated. The maximum wall temperatures occur when boiling commences. This is due to the much higher heat transfer in boiling compared to convection. The maximum temperatures of the wall depend on the ratio of the amount of cooling liquid to heated surface of the column or beam and the wall thickness. Diagrams give the maximum wall temperatures (outside and centre) as a function of cooling liquid per sq. m. for 10, 20. 30 and 40 mm wall thickness. The cooling liquid is a 35 % solution in water of K sub 2 CO sub 3 . The time to reach maximum wall temperature during a hydrocarbon fire is shown as a function of cooling liquid volume per sq. m. heated surface for the various wall thickness. 6 drawings. (ERA citation 08:050649)