Improving the installation for fire extinguishing with finelydispersed water
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 2, Issue 10
Abstract
<p class="20">Fires at residential buildings are extinguished by both compact and sprayed jets of water. The result of fire suppression at facilities using compact jets of water is the increased consumption of water, which leads to collapse of the structures at a building. The application of water firehoses without fire-rescue vehicles is also impossible. Water that is sprayed to the droplets of small size makes it possible to extinguish a flame mainly by the dilution of a gas combustible medium with water vapor, formed during evaporation of droplets. The effectiveness of fire extinguishing with finely-dispersed water is affected by a diameter of the droplets or dispersion.</p><p>It is proposed, to suppress developed fires at facilities, to apply the installation of fire extinguishing with finely-dispersed water of the pulse-periodic action. We have tested the designed installation for fire extinguishing. Based on the research results, we obtained parameters for the operation of the installation, such as the velocity of the shock wave, which amounted to 1,667–1,724 m/s. It was established that one detonation cycle uses about 30 mg/cycle of combustible mixture. Detonation cycle frequency is greater than 20 Hz. The estimated total power of the installation is 50 kW. According to results of the study, we found that the transition of combustion into detonation occurs at the expense of compression and heating of the combustible mixture. The established parameters for the operation of the installation make it possible to disperse water jets in the installation's barrel by a flow of detonation products.</p><p>The resulting dispersion of a finely-dispersed water jet by the method of trapping the droplets of water is within 60‒100 µm. Based on the results of our study, it was established that an optimum water feed to the installation is 0.5‒1 l/s, which depends on the area of a fire. This means that during operation water consumption to suppress a fire would equal 1,800 l, which would enable the removal of heat from a fire site at about 4 GJ/h; the area of a fire in this case would make up 125 m<sup>2</sup>.</p>
Authors and Affiliations
Dmytro Dubinin, Kostyantyn Korytchenko, Andrei Lisnyak, Ihor Hrytsyna, Volodimir Trigub
Keywords
Related Articles
- EP ID EP527924
- DOI 10.15587/1729-4061.2018.127865
- Views 68
- Downloads 0
Controlling the process of explosive destruction of rocks in order to minimize dust formation and improve quality of rock mass
<p>Based on the adapted model by G.N. Lyakhov, we established a pattern in the propagation of pressure waves during explosive destruction of rocks, which relates to acoustic rigidity of the gap filler between the charge...
Development of a selfdiagnostics subsystem of the informationmeasuring system using anfis controllers
<p>A hybrid self-diagnostic system was designed to evaluate correctness of functioning of sensors of the information-measuring system of testing hydraulic transmissions of diesel locomotives of UHP 750 type. The system f...
Improving efficiency of machining the geometrically complex shaped surfaces by milling with a fixed shift of the cutting edge
<p>In order to improve efficiency of machining by milling geometrically complex shaped surfaces, mainly the methods related to improvement of properties of the tool material, change of composition and properties of the t...
Development of a method to calculate the probability of a berth failure under vertical stochastic load
We developed the method for determining the probability of achieving the maximum value of loads from the cargo that is stored at the port terminal warehouse on the front wall of the berth under conditions of uncertainty...
A method for determining information diffusion cascades on social networks
Information diffusion on social networks has many potential real-world applications such as online marketing, e-government campaigns, and predicting large social events. Modeling information diffusion is therefore a cruc...