Analysis on the Effect of Obstruction on Sprinkler Skipping in Air Conditioner Room Fire

Ji Tae Kim, Jun Suk Nam, Ryang Hoon Kim, Seung Yeon Kim and Hong Sun Ryou ()
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Ji Tae Kim: School of Mechanical Engineering, Chung-Ang University, Seoul 156756, Korea
Jun Suk Nam: School of Fire Engineering, Gimcheon University, Gimcheon 39528, Korea
Ryang Hoon Kim: School of Mechanical Engineering, Chung-Ang University, Seoul 156756, Korea
Seung Yeon Kim: Fire Technology Research Center, Firebuster, Seoul 156756, Korea
Hong Sun Ryou: School of Mechanical Engineering, Chung-Ang University, Seoul 156756, Korea

Energies, 2022, vol. 15, issue 18, 1-11

Abstract: Sprinkler skipping is an important issue in fire spread. In general, two sprinklers are installed in air conditioner rooms at the ceiling and 30 cm below to avoid spray failure by energy recovery ventilator in the ceiling. However, there is a problem in that sprinkler skipping occurs in the air conditioner room. In this study, the sprinkler skipping phenomenon was analyzed through numerical analysis and the applicability of the open type of sprinkler operation method was reviewed. As a result, when the upper sprinkler works, sprinkler skipping occurred in all cases. The lower sprinkler shall not rise above the operating temperature of 68.3 °C with a maximum temperature of 65 °C. In particular, the spray failure caused by the energy recovery ventilator reduces the sprinkler head temperature by more than 8 °C by concentrating the spray droplets. As an open type, simultaneous operation of two sprinklers is capable of obtaining an appropriate fire extinguishing effect by covering the fire source with the spray of the lower sprinkler. The research results are expected to help in fire protection in buildings such as modern apartments with air-conditioned rooms.

Keywords: sprinkler skipping; air conditioner room; spray failure; temperature; apartments (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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