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Investigating positive pressure ventilation

Svensson, Stefan LU ; Ezekoye, Ofodike and Nicks, Robert (2007) Interflam 2007 In Interflam 2007 2. p.1277-1277
Abstract (Swedish)
Positive pressure ventilation was investigated. Forty-three experiments were performed on the first, second, and third floors of a three-storey brick building with wooden trusses. The objectives of the experiments were to investigate the effects of distance between fan and inlet, size and numbers of outlets, and volume of building on vent flow rates when using positive pressure ventilation. Four different fans from two different manufacturers with varying characteristics were used. Airflow through outlets was measured. The results shows that flow rate through an exhaust increases with increasing distance between fan and inlet up to some maximum value and a decreasing flow rate after this point. Also, flow rate through an exhaust decreases... (More)
Positive pressure ventilation was investigated. Forty-three experiments were performed on the first, second, and third floors of a three-storey brick building with wooden trusses. The objectives of the experiments were to investigate the effects of distance between fan and inlet, size and numbers of outlets, and volume of building on vent flow rates when using positive pressure ventilation. Four different fans from two different manufacturers with varying characteristics were used. Airflow through outlets was measured. The results shows that flow rate through an exhaust increases with increasing distance between fan and inlet up to some maximum value and a decreasing flow rate after this point. Also, flow rate through an exhaust decreases as volume of the structure increases. In a larger volume more leakage can be expected, thus decreasing the efficiency of positive pressure ventilation. In addition, increasing the exhaust area decreases the flow loss, thus increasing the efficiency of positive pressure ventilation. The number of exhaust openings affects the volumetric flow rate in a nonlinear manner. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
positive pressure ventilation, firefighting, tactics, fire service
in
Interflam 2007
volume
2
pages
1287 pages
publisher
Interscience Communications Ltd
conference name
Interflam 2007
ISBN
978-0-9556548-0-0
language
English
LU publication?
no
id
56193087-d49c-4695-9daa-e45358393876
date added to LUP
2017-04-11 15:43:34
date last changed
2017-05-16 08:25:15
@inproceedings{56193087-d49c-4695-9daa-e45358393876,
  abstract     = {Positive pressure ventilation was investigated. Forty-three experiments were performed on the first, second, and third floors of a three-storey brick building with wooden trusses. The objectives of the experiments were to investigate the effects of distance between fan and inlet, size and numbers of outlets, and volume of building on vent flow rates when using positive pressure ventilation. Four different fans from two different manufacturers with varying characteristics were used. Airflow through outlets was measured. The results shows that flow rate through an exhaust increases with increasing distance between fan and inlet up to some maximum value and a decreasing flow rate after this point. Also, flow rate through an exhaust decreases as volume of the structure increases. In a larger volume more leakage can be expected, thus decreasing the efficiency of positive pressure ventilation. In addition, increasing the exhaust area decreases the flow loss, thus increasing the efficiency of positive pressure ventilation. The number of exhaust openings affects the volumetric flow rate in a nonlinear manner.},
  author       = {Svensson, Stefan and Ezekoye, Ofodike and Nicks, Robert},
  booktitle    = {Interflam 2007},
  isbn         = {978-0-9556548-0-0},
  keyword      = {positive pressure ventilation,firefighting,tactics,fire service},
  language     = {eng},
  pages        = {1277--1277},
  publisher    = {Interscience Communications Ltd},
  title        = {Investigating positive pressure ventilation},
  volume       = {2},
  year         = {2007},
}