Document Type thesis Author Name Crocker, Jeremiah Email Address jeremiah.crocker at tycofp.com URN etd-053008-142400 Title The Effect of Sprinkler Sprays on Fire Induced Mass Flow Rates Degree MS Department Fire Protection Engineering Advisors Professor Ali Rangwala, Advisor David LeBlanc, Co-Advisor Professor Nicholas Dembsey, Co-Advisor Professor Kathy Notarianni, Department Head Keywords Performance Based Design Sprinkler Spray Vent Flow Date of Presentation/Defense 2008-04-28 Availability unrestricted
Performance based methodologies are becoming increasingly common in fire safety due to the inability of prescriptive codes to account for every architectural feature. Fire Sprinkler suppression systems have long been used to provide property protection and enhance life safety. However, very few methodologies exist to account for the impact of sprinkler sprays on fire scenarios. Current methods are extremely complicated and difficult to use as an engineering tool for performance based design. Twenty four full scale fire tests were conducted at Tyco Fire Suppression & Building Products Global Technology Center to determine a simple method for accounting for the impact of a single residential sprinkler on fire induced doorway flows. It was found that a spraying sprinkler reduced the mass flows at the doorway while maintaining two stratified layers away from the sprinkler spray. The mass flow reduction was consistent and could be predicted through the use of a simple buoyancy based equation. The current study suggests that the buoyancy equation can be altered through the use of a constant cooling coefficient (equal to 0.84 for a Tyco LFII (TY2234) sprinkler) based on the test results reported in this paper. This study is a proof of concept and the results suggest the methodology can be applicable to similar situations.
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