| Download | - View accepted manuscript: Effect of air convection on the performance of water mist fire suppression systems (PDF, 1.1 MiB)
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| Author | Search for: Liu, Z. G.; Search for: Kim, A. K.1; Search for: Su, J. Z.1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Research in Construction
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| Format | Text, Article |
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| Conference | 7th AIAA/ASME Joint Thermophysics and Heat Transfer Conference: June 14-18, 1998, Albuquerque, New Mexico |
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| Subject | Water mist |
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| Abstract | Eperimental results obtained from a full-scale test series of water mist systems using various ventilatiion conditions are reported in this paper. The full-scale test series was conducted under fire scenarios with different fire sizes, types and locations in an empty enclosure and in a simulated machinery space. The ventilation conditions in the tests varied from the door open (natural ventilation) and with the door open combined with an exhaust fan running (forced ventilation). Two types of water mist systems (single-fluid and twin-fluid) were used in the tests. The effect of air convection on the extinguishment performance of the water mist system was examined by an analysis of extinguishment times and the distribution of room teperature and gas concentrations in the comparatment. The test results and corresponding analysis indicated that the water mist discharge quickly cooled the comparatment and reduced the mass exchange, between the room and its surroundings, caused by the temperature difference. Also, the strong dynamic mixing created by the water mist discharge restricted the penetration of air convection into the depths of the comparatment and reduced the impact of air convection on fire suppression by water mist. The water mist systems effectively extinguished fires under natural ventilation conditions. The effect of natural convection on the performance of the water mist system was dependant on the fire location in the comparatment and the characteristics of the water mist system used. Under forced ventilation conditions, the extinguishment capability of the water mist system was reduced due to the strong mass ecchange between the room and its surroundings. |
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| Publication date | 1998-06-01 |
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| Publisher | American Society of Mechanical Engineers |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 41365
NRC-IRC-7955 |
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| NPARC number | 20330452 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 2e6e4ef3-e50c-44a0-ba49-0a57f4212e7a |
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| Record created | 2012-07-18 |
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| Record modified | 2024-05-21 |
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