At present, fire detection based on gas analysis in road tunnels has not been widely used. The aim of the project is therefore to identify a suitable gas sensor and optimise its placement inside tunnels so that it can serve as a reliable early detection system for vehicle fires. Fundamental insights into the mechanisms leading to vehicle fires are being explored. A small tunnel fire is also created in order to validate a computer simulation. After successful calibration of the simulation models, other situations are extrapolated to enable various tunnels to be supplied with warning sensors in an efficient and effective way. Although the main focus of the project is on safety, environmental aspects and further knowledge of the very different materials that could catch fire, e.g. vehicle components or cargo, and the distribution of their combustion products, are expected as a by-product of the project.
The project includes:
- Identification of (gaseous) substances which form at the very early stage of a fire.
- Development of a sensor for reliable detection of these components
- Evaluation of optimum positioning of the sensors in the tunnel cross-section
Validation of the findings through pilot experiments at the Hagerbach Test Gallery.