29.
Large cooking oil pool
fires, occurring in industrial oil cookers, present a severe hazard to food processing plants due to their size and the large amount of hot oil involved. This paper reports a series of full-scale
fire experiments conducted in a large industrial oil cooker mock-up. The characteristics of large cooking oil pool
fires and the effect of oil depth and hood position in the oil cooker on
fire growth were studied. The use of water mist for extinguishing large oil pool
fires and their extinguishing performance under different discharge pressure and with different types of water mist systems were investigated. Experimental results showed that the cooking oil underwent a substantial expansion in volume during heating. The
fires developed quickly once the oil auto-ignited. The
fire growth rate was affected by the oil depth in the pan and the hood position in the oil cooker. The water mist
fire suppression systems effectively extinguished large cooking oil
fires and prevented them from re-igniting. Their extinguishing performance was determined by the type of water mist system, discharge pressure and hood position in the oil cooker.
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