Nuclear Engineering and Technology

  • 제53권4호
  • /
  • Pages.1157-1166
  • /
  • 2021
  • /
  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Numerical analysis to determine fire suppression time for multiple water mist nozzles in a large fire test compartment

  • Ha, Gaghyeon (Department of Mechanical Engineering, Chungnam National University) ;
  • Shin, Weon Gyu (Department of Mechanical Engineering, Chungnam National University) ;
  • Lee, Jaiho (Korea Hydro & Nuclear Power Co., Ltd, Central Research Institute)
  • 투고 : 2020.06.12
  • 심사 : 2020.09.27
  • 발행 : 2021.04.25
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초록

In this study, a numerical sensitivity analysis was performed to determine the fire suppression time for a large number of water mist nozzles in a large fire compartment. Fire simulations were performed using FDS (Fire dynamics simulator) 6.5.2 under the same condition as the test scenario 5 of the International Maritime Organization (IMO) 1165 test protocol. The sensitivities of input parameters including cell size, extinguishing coefficient (EC), droplets per second (DPS), and peak heat release rate (HRR) of fuel were investigated in terms of the normalized HRR and temperature distribution in the compartment. A new method of determining the fire suppression time using FDS simulation was developed, based on the concept of the cut-off time by cut-off value (COV) of the heat release rate per unit volume (HRRPUV) and the cooling time by the HRR cooling time criteria value (CTCV). In addition, a method was developed to determine the average EC value for the simulation input, using the cooling time and cut-off time.

키워드

과제정보

This work was sponsored by the Korea Hydro & Nuclear Power Co., Ltd. of South Korea [Grant Number A15LP07].

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