A series of 56 large scale fire epxeriments in the range of 40 to 120 MW has been carried out in a generic offshore module. The effect of deluge fire water application has been measured for different set-ups. Both deluge nozzle type and water application rate have been varied in the experiments.

The main findings from the experiments are:

  • Deluge water application has better effect on liquid spray fires than on gas jet fires.

  • A deluge water application rate of 10 (l/min)/m2 will have negligible or little effect on the highest gas temperature in the fire.

  • A deluge water application rate of 20 (l/min)/m2 has a documented more favourable effect than an application rate of 10 (l/min)/m2.

  • For gas jet fires, the flame hotspot temperature will persist, independent of deluge configuration.

  • The choice of MV vs HV deluge nozzles is dependent on fire scenario.

  • MV nozzles have their strength in reducing heat fluxes and iso-fluxes volumes, thereby reducing the amount of equipment and structure exposed to high radiation load.

  • HV nozzles have their strength in ability to equipment cooling and lower vulnerability to wind.

You can access this article if you purchase or spend a download.