- Author
-
Wieser, D.
|
Jauch, P.
|
Willi, U.
- Title
- Einfluss der Hohenlage des Brandortes auf Brandmelder-Testbrande. [Effect of the Altitude of the Fire Site on Fire Detector Test Fires.]
- Coporate
- Cerberus AG, Mannedorf, Switzerland
- Book or Conf
- University of Duisburg. International Conference on Automatic Fire Detection "AUBE '95", 10th. Proceedings. [Internationale Konferenz uber Automatischen Brandentdeckung.] April 4-6, 1995,
Duisburg, Germany,
Luck, H., Editors,
462-471 p.,
1995
- Keywords
-
fire detection
|
fire detection systems
|
altitude
|
test fires
|
pressure
|
burning rate
|
smoke density
- Abstract
- [Abstract in English] We have measured the pressure dependence of fires similar to those of the European standard fires at heights above sea level from 400 m (970 mbar) to 3000 m (710 mbar) in a mobile test room of reduced size (6 m x 2.8 m x 2.1 m). We recorded standard parameters m, y and delta T as well as CO, CO₂ and O₂ concentrations. Out data show a dependence of burning rates on pressure as p. with alpha=1...1.3. Whereas maxima of delta T and change of CO₂ concentration show no significant dependence on pressure, extinction m decreases by a factor of 2.7±0.2 (polyurethane foam fire) or 2.2±0.2 (n-heptant fire) with pressure decreasing from 970 mbar to 710 mbar. Smoke density y is less pressure sensitive than m.