Communication Dans Un Congrès Année : 2015

Measures of the pollutants emitted during the combustion of Cistus monspeliensis twigs according to the diameters of these particles

Résumé

Our study aims to determine the particles size of plant involved in fire spread , in order to estimate the amount of leaves, twigs and wood implicated in fire spread. Thereby, it was determined from thermal parameters (HRR, mass loss, THR, efficiency) that the diameters of Cistus monspeliensis less than 4 mm, burn very quickly. These diameters are considered as elements that contribute to firespread. This first result on the particle size (< 4mm) involved in fire spread will lead to better estimate the fuel load to be taken into account in the propagation models (percentage of real burden of vegetation on the ground according to the effective size of the particles and their fraction in the plant). This fuel load is an important parameter for determining the fire propagation, the calculation of its intensity and the interpretation of its impact. Moreover, it is observed two humps of HRR from particle size above 5 mm. The second humpis increasingly important according to the growth of particles diameters. This result indicates a change in fire behavior of twigs between 4 and 5 mm. These elements largely burn behind the flame front. The second part of this study is devoted to the characterization of pollutants emitted by Cistus monspeliensis twigs burned according to their sizes. It aims to determine the quantities of pollutants potentially inhalable by the personnel involved (firefighters) and the exposed population. Further, it has been shown that CO2 is the most emitted gas with constant quantities according to the particles sizes. Other identified gases are CH4, NOx and 17 NMVOC.

Domaines

Fichier non déposé

Dates et versions

hal-02106046 , version 1 (22-04-2019)

Identifiants

  • HAL Id : hal-02106046 , version 1

Citer

Lara Leonelli, Toussaint Barboni, Paul-Antoine Santoni, Virginie Tihay-Felicelli. Measures of the pollutants emitted during the combustion of Cistus monspeliensis twigs according to the diameters of these particles. International Conference on Fire Behaviour and Risk, May 2015, Alghero, Italy. ⟨hal-02106046⟩
86 Consultations
0 Téléchargements

Partager

  • More