Determining the Extinguishing Time of a Class B Fire Using a Segway-based Water Spray Fire Extinguishing Control System
Year: 2025
Type: article
Abstract: A formalized option is provided for determining the time to extinguish a class B fire with the definition of a spray water fire extinguishing control system, based on the use of its transient function at a level of 10.0% relative to its maximum value. To determine the transient function of the sigma-based fire extinguishing control system for sprayed water, its transfer function is used, which is represented by a fractionally rational function with a fourth-order Hurwitz polynomial and in which the delay is taken into account as a second-order polynomial. A mathematical model for the error of the transient function of the sigma-based fire extinguishing control system for sprayed water due to errors in the parameters of its functional elements has been obtained. For the characteristic values of the parameters of the sigway-based fire extinguishing control system, estimates of the extinguishing time of a class B fire were obtained and it was shown that with the same errors in the parameters of this system, which are equal to 10.0%, there is an error in determining the extinguishing time, which is 18.3%. The presence of such an error in determining the time to extinguish a fire requires an increase in water consumption by 1.18 times. Taking into account the finite water reserves at the mobile fire unit, there is a need to obtain information on the value of the parameters of the fire extinguishing control system. The paper presents the features of determining (controlling) the parameters of the fire extinguishing system with sprayed water based on sigma, which include - operator parameters are determined using simulators; - class B fire parameters are determined using model fire foci, in which the liquid of the technological process of the object where a fire may occur is used as a burning liquid; - the properties of the area where sprayed water is delivered to the fire are taken into account (in the form of a delay time, which is included as an additive component of the delay time of the fire extinguishing control system).
Source: Municipal economy of cities
Authors: Y. Abramov, V. Kolomiiets, V. Sobyna
Institution: National University of Civil Protection of Ukraine
Language: English
Subfield: Safety, Risk, Reliability and Quality
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4409813297