THE RESEARCH OF THE EFFECT OF GAS TRANSMISSION ON THE EFFECTIVENESS OF CARBON FIRE EXTINGUISHING

  • V. M. Nuianzin Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
  • M. O. Kropyva Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
  • A. O. Maiboroda Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
  • A. Yu. Vovk Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
  • I. A. Marchenko Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
  • D. Kopytin Cherkasy Institute of Fire Safety named after Chornobyl Heroes of NUCD Ukraine

Abstract

The purpose of the research of this work is to study the effectiveness of fire extinguishing using carbon dioxide in the light of changes in gas exchange. The analysis of the use of neutral gases in automatic fire extinguishing systems, which provide a volumetric way of extinguishing is conducted. The analysis found that the rate of elimination of combustion will depend on the gas exchange in the room, ie the number and location of ventilation openings, doors, windows and the like. To investigate the effect of gas exchange on the efficiency and speed of cessation of combustion, an installation was designed to simulate a real room and a computer model of the same simulation room. The created installation allows to apply qualities of a phlegmatizer - carbon dioxide, nitrogen, argon and more. The structural components of the installation are substantiated in such a way that the phlegmatizer from the pressure vessel enters into the combustion chamber equipped with two openings: the first to remove combustion products from the chamber, the second - for entering of the phlegmatizer and two openings that simulate ventilation and inlet passage and allow gas exchange in the camera. The amount of phlegmatizer supplied to the combustion chamber is regulated by the gearbox. A thermocouple is installed in the chamber to control the temperature in the combustion zone. A computer model of a combustion camera was created, similar to a full-scale experiment. A computational experiment was performed. A full-scale experiment was conducted. It is established that the influence exerted by open ventilation ducts on the rate of cessation of combustion is most significant at low feed rates of inert gases. The relative deviation of the results of mathematical modeling from the experimental data is calculated. The results of the study show the effectiveness of simulation of thermal processes for further studies of the effect of gas exchange on the rate of extinguishing fires in closed volumes

Author Biographies

V. M. Nuianzin, Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine

PhD in technical sciences

M. O. Kropyva, Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine

PhD in technical sciences

A. O. Maiboroda, Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine

PhD in technical sciences, docent

Published
2019-12-23
Issue
Vol. 3 No. 2 (2019): Collection of Scientific Papers of Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine «Emergency Situations: Prevention and Liquidation»
Section
Статті