Simulation of critical evacuation conditions for a fire scenario involving cables and comparison of two different cables
Author
Summary, in English
Previous studies on the evaluation of irritant species from burning cables in a
modified prEN 50399 fire test produced FEC/FED values based on ISO TS 13571.
However, the ISO standard mentions in its scope that these indices can only be used
within e.g. modelling. For this reason Europacable (ECBL) initiated a preliminary
case-study to asses the possibility of using modern fire safety engineering techniques.
The scope of the project was the evaluation of the evacuation conditions for a
realistic fire scenario involving two types of cable fires that produce different levels
of heat, smoke and gases. Both CFD (Computational Fluid Dynamics) modelling by
means of the software package FDS (Fire dynamics simulator) and evacuation
modelling by means of the software package Simulex were performed. The results
were used to calculate FED (fractional effective doses) and FEC (fractional effective
concentration). The results showed that the developed methodology allows
evaluation of critical evacuation conditions based on not only temperature and
visibility, but also on gas composition. One of the selected cables created critical
conditions for some of the occupants during evacuation for the chosen design fire
when the production of irritant gases (HCl, acreolein, Formaldehydes) is considered.
modified prEN 50399 fire test produced FEC/FED values based on ISO TS 13571.
However, the ISO standard mentions in its scope that these indices can only be used
within e.g. modelling. For this reason Europacable (ECBL) initiated a preliminary
case-study to asses the possibility of using modern fire safety engineering techniques.
The scope of the project was the evaluation of the evacuation conditions for a
realistic fire scenario involving two types of cable fires that produce different levels
of heat, smoke and gases. Both CFD (Computational Fluid Dynamics) modelling by
means of the software package FDS (Fire dynamics simulator) and evacuation
modelling by means of the software package Simulex were performed. The results
were used to calculate FED (fractional effective doses) and FEC (fractional effective
concentration). The results showed that the developed methodology allows
evaluation of critical evacuation conditions based on not only temperature and
visibility, but also on gas composition. One of the selected cables created critical
conditions for some of the occupants during evacuation for the chosen design fire
when the production of irritant gases (HCl, acreolein, Formaldehydes) is considered.
Department/s
Publishing year
2010
Language
English
Publication/Series
LTH report
Full text
Document type
Report
Publisher
Lund University
Topic
- Building Technologies
- Other Civil Engineering
Keywords
- fire
- simulation
- cables
- evacuation
- toxicity
- CFD
- fractional effective dose
Status
Published
Report number
3147
Research group
- Fire modeling
ISBN/ISSN/Other
- ISSN: 1402-3504