Fire ventilation

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Stefan Svensson<strong>Fire</strong> VentilationSwedish Rescue Services Agency
The content of this book may not be duplicated, wholly or in part, without theconsent of the Swedish Rescue Services Agency, in accordance with the SwedishAct on Copyright in Literary and Artistic Works (1960:729). This applies to anyduplication by means of printing, copying, recording, etc.<strong>Fire</strong> VentilationAuthor: Stefan SvenssonEditor: Anna-Lena GöranssonTranslation: Tekniktext ABDesign: Kristina Malmstedt-Svensson, Karin RehmanIllustrations: Per HardestamCover photo: Tommy LindblomPrinted by: NRS Tryckeri, HuskvarnaFirst published in 2000Order number: : U30-651/05ISBN: 91-7253-279-3© 2005, Stefan Svensson and the Swedish Rescue Services Agency
Page 1: To carry out fire and rescue operat
Page 5 and 6: Inlets 51Horizontal fire ventilatio
Page 7 and 8: ForewordIn this book fire ventilati
Page 10 and 11: chapter 1Fire ventilationThe fundam
Page 12 and 13: Openings to gain access to a fire t
Page 14 and 15: would be the case, for example, in
Page 16: esults in quicker and more simple e
Page 19 and 20: PyrolysisIrreversible chemicaldecom
Page 21 and 22: Flashover results in afully develop
Page 24 and 25: chapter 3Fire gasesFire gases is a
Page 26: Fire gases containsproducts such as
Page 29 and 30: The dynamic pressure differences ca
Page 31 and 32: Pressure differencesproducedby diff
Page 33 and 34: The hydrodynamic pressure differenc
Page 35 and 36: Direction of windnegative pressurep
Page 37 and 38: There can be verycomplex windcondit
Page 39 and 40: In buildings erectedduring the 1960
Page 41 and 42: Calculation of thermal expansionSta
Page 43 and 44: Calculation of thermal buoyancy for
Page 45: The different pressure differences
Page 49 and 50: For practical reasons it can someti
Page 51 and 52: Calculation of the size of outletsT
Page 53 and 54:
almost always preferable to strive
Page 55 and 56:
The mass flow through the inlet can
Page 57 and 58:
Openings andventilation can beimple
Page 59 and 60:
When a room or a firecell is consid
Page 61 and 62:
60sure ventilation can also be appl
Page 63 and 64:
Negative pressure ventilation is no
Page 65 and 66:
The pressurising of adjacent rooms
Page 67 and 68:
Fans can during positivepressure ve
Page 69 and 70:
A large outlet produces a larger vo
Page 71 and 72:
The volume flow in the outlet is gi
Page 73 and 74:
a hall and no other internal connec
Page 76 and 77:
chapter 6Creating openingsOpenings
Page 78 and 79:
Electric motor powered toolsThe ele
Page 80 and 81:
12 3The circular saw is used to saw
Page 82:
Water cutting.plastic explosive is
Page 85 and 86:
Lowering deviceFall damperConnectin
Page 88 and 89:
chapter 8Openings in differentroof
Page 90 and 91:
its way through on its own, without
Page 92 and 93:
drop down on personnel standing on
Page 94 and 95:
It is a good idea if the outer open
Page 96 and 97:
A completely manual shutter, often
Page 98:
In buildings that have systems for
Page 101 and 102:
The measures that areinitiated, coo
Page 103 and 104:
It is only through control that a s
Page 105 and 106:
104
Page 107 and 108:
elatively cold and diluted. Because
Page 109 and 110:
Flashover has still nottaken place
Page 111 and 112:
Flashover has takenplace and the fi
Page 113 and 114:
Piercing nozzle(fog nail).Alternati
Page 115 and 116:
To take into consideration at stair
Page 117 and 118:
Further readingBengtsson, L. (1999)
Page 119 and 120:
Särdqvist, S. (1994). Övertrycksv
Page 121:
120
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Fire ventilation

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