Hodnocení hasicí schopnosti vysokotlakého hasicího zařízení

Abstract

This bachelor thesis focuses on the experimental evaluation of the extinguishing capability of mobile high-pressure systems designed for initial fire intervention by fire units. The theoretical section analyzes the physical principles of atomized water suppression, specifically heat transfer mechanisms, phase transitions, and compartment inertization. The study includes a multi-criteria analysis of commercially available units, performed using a modified decision matrix method based on pairwise comparison. The core of the research involves the design and execution of an experiment in a semi-enclosed environment, comparing the extinguishing efficiency of the ZEUS 23/50 high-pressure unit, a Protek D25 combination nozzle, and a hobby pressure washer during the cooling of a diesel fuel pool fire. For an objective assessment of the measured data, the Area Under the Curve (AUC) method and a normalized extinguishing efficiency coefficient were employed. The vertical temperature profile within the compartment was further modeled using non-linear regression with the Boltzmann function. Experimental results demonstrated that the high-pressure unit achieved a 63.5% higher cooling effect compared to the standard D25 nozzle at a comparable flow rate. The final section formulates strategic recommendations for category V fire units, particularly regarding the integration of these systems into light intervention vehicles with a gross weight of up to 3.5 tonnes.