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A platform for research: civil engineering, architecture and urbanism
Spray cooling in room fires
A series of 25 fire tests was conducted to investigate cooling in room fires by sprinkler spray. The tests were conducted in a 3.66 m× 7.32 m×2.44 m high test room, which had a 1.22 m×2.44 m high opening centered in one of the 3.66 m walls. The fire source was a spray fire with constant heptane flow rate located opposite the room opening. In each test only one sprinkler was installed at the ceiling. Three geometrically similar sprinklers with nozzle diameters of 11.1 mm, 8.36 mm, and 6.94 mm were tested. Convective heat loss rate through the room opening was measured with a large fire products collector. The total heat release rate of the fire was derived from the fire products collector measurements using a carbon balance method. Heat loss rate to the ceiling and walls was measured, as well as radiative loss through the opening. Empirical correlations for the heat absorption rate of the spray and the convective heat loss rate through the room opening were established in terms of 1) total heat release rate of the fire; 2) heat loss rate to the ceiling, walls, and floor, and radiative heat loss rate through the room opening; 3) room opening area and height; 4) sprinkler discharge rate; 5) water pressure; and 6) sprinkler orifice diameter. These correlations accounted for the effects of room geometry and opening size. Experimental results obtained for a different room geometry also followed these correlations.
Spray cooling in room fires
A series of 25 fire tests was conducted to investigate cooling in room fires by sprinkler spray. The tests were conducted in a 3.66 m× 7.32 m×2.44 m high test room, which had a 1.22 m×2.44 m high opening centered in one of the 3.66 m walls. The fire source was a spray fire with constant heptane flow rate located opposite the room opening. In each test only one sprinkler was installed at the ceiling. Three geometrically similar sprinklers with nozzle diameters of 11.1 mm, 8.36 mm, and 6.94 mm were tested. Convective heat loss rate through the room opening was measured with a large fire products collector. The total heat release rate of the fire was derived from the fire products collector measurements using a carbon balance method. Heat loss rate to the ceiling and walls was measured, as well as radiative loss through the opening. Empirical correlations for the heat absorption rate of the spray and the convective heat loss rate through the room opening were established in terms of 1) total heat release rate of the fire; 2) heat loss rate to the ceiling, walls, and floor, and radiative heat loss rate through the room opening; 3) room opening area and height; 4) sprinkler discharge rate; 5) water pressure; and 6) sprinkler orifice diameter. These correlations accounted for the effects of room geometry and opening size. Experimental results obtained for a different room geometry also followed these correlations.
Spray cooling in room fires
You, Hong-Zeng (author) / Kung, Hsiang-Cheng (author) / Han, Zhanxian (author)
Symposium (International) on Combustion ; 21 ; 129-136
1988-01-01
8 pages
Article (Journal)
Electronic Resource
English
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