On a more precise assessment of coordinates of the seat of fire in the premises

Introduction. The problem of quick identification of fire coordinates in the premises is particularly relevant electrical activation. A number of authors focus on this problem, in particular, they analyze the method of graphic and analytic positioning (х_о, у_о) of the fire seat in the premises.

Theoretical part. The method developed by the authors makes it possible to identify the coordinates of a fire by reading N values of temperature sensors. The method has the following features: 

a) it is based on the fire model obtained by R. Alpert for premises, and shows that it is necessary to take into account not just the temperature read by temperature sensors, but the value of this temperature in third power;

b) it allows you to determine the coordinates of the seat of fire, not only by the increase in temperature, but also by the speed of its growth, and the result in both cases will be almost the same and independent of either the height of the premises, or time, or the form of fire.

Computer experiment. To verify the obtained expression, a computer experiment was carried out using the example of a warehouse. For two A and B fire variants using R. Alpert model and the specified coordinates of the fronts, using a specially developed computer program, the dynamics of temperature increase ΔTi (t) and the rate of its change were simulated.

Full-Scale experiment. The paper presents the results of a full-scale experiment in which data from 16 thermocouples showing the spread of the thermal field of fire were registered. Using this data in the computer program it was possible to set the coordinates of the fire that corresponded to the real location of the seat of fire.

Conclusions. On the basis of the obtained expression it is possible to set quickly, with acceptable reliability, the coordinates of the seat of fire, which allows to forcefully activate one, two or three sprinklers that are able to fight the fire at the earliest stage with the minimum flow of fire extinguishing agent.

1. Markus E., Snegirev A., Kuznetsov E., Tanklevskiy L. Application of a simplified pyrolysis model to predict fire development in rack storage facilities. Journal of Physics: Conference Series. 2018; 1107(4):042012. DOI: 10.1088/1742-6596/1107/4/042012

2. Markus E., Snegirev A., Kuznetsov E., Tanklevskiy L. Fire growth in a high-rack storage. Proceedings of the Ninth International Seminar on Fire and Explosion Hazards. 2019; 2:796–807. DOI: 10.18720/spbpu/2/k19-70

3. Dorozhkin A.S., Tarantsev A.A., Minkin D.Yu. Problems of fire safety underground parking. Problems of Technosphere Risk Management. 2015; 1(33):13-18. (rus.).

4. Tarantsev A.A., Shidlovsky G.L., Potashev D.A. Features of the spread of fire hazards in underground parking lots. Problems of Technosphere Risk Management. 2020; 1(53):43-52. (rus.).

5. Kopylov S., Tanklevskiy L., Vasilev M., Zima V., Snegirev A. Advantages of Electronically Controlled Sprinklers (ECS) for fire protection of tunnels. Proceedings from the Fifth International Symposium on Tunnel Safety and Security, New York, USA, March 14-16, 2012. 2012; 1:87-92.

6. Rode A.A., Ivanov E.N., Klimov G.V. Automatic systems for fire extinguishing. Moscow, Stroyizdat Publ., 1965; 187. (rus.).

7. Khodakov V.F. Automatic systems for water fire extinguishing. Kiev, Budivelnik, 1970; 92. (rus.).

8. Bubyr N.F., Ivanov A.F., Baburov V.P., Mangasarov V.I. Installations of automatic fire protection: study guide for fire-technical schools. Moscow, Stroyizdat, 1979; 176. (rus.).

9. Bolotin E.T., Mazhara I.I., Pestmal N.F. Design of automatic fire extinguishing systems. Kiev, Budivelnik, 1980; 116. (rus.).

10. Bubyr N.F., Vorobyev R.P., Bystrov Yu.V., Zuykov G.M. Operation of fire automatics. Moscow, Stroyizdat, 1986; 367. (rus.).

11. Agafonov V.V., Kopylov N.P. Aerosol fire extinguishing installations: elements and characteristics, design, installation and operation. Moscow, VNIIPO Publ., 1999; 232. (rus.).

12. Meshman L.M., Tsarichenko S.G., Bylinkin V.A., Aleshin V.V., Gubin R.Yu. Design of water and foam automatic fire extinguishing systems. Moscow, VNIIPO of EMERCOM of Russia, 2002; 413. (rus.).

13. Sobur S.V. Automatic fire extinguishing installations: handbook. Moscow, Spetstekhnika Publ., 2003; 400. (rus.).

14. Safronov V.V., Aksenova E.V. The selection and calculation of parameters of fire extinguishing and alarm systems: study guide. Orеl, Orel State Technical University Publ., 2004; 57. (rus.).

15. Khrapskiy S.F., Starikov V.I., Rysev D.V. Industrial and fire automatics: study guide. Omsk, OmSTU Publ., 2013; 152. (rus.).

16. Sobur S.V. Fire alarm systems: study guide. Moscow, Pozhkniga Publ., 2015; 256. (rus.).

17. Voronkov O.Yu. Calculation, installation and operation of automatic fire extinguishing systems. Omsk, OmSTU Publ., 2016. (rus.).

18. Ilyushov N.Ya. Automatic fire extinguishing systems: study guide. Novosibirsk, NSTU Publ., 2016; 134. (rus.).

19. Mitchell N.D. New Light on Self-Ignition. Quarterly of the National Fire Protection Association. 1951; 45(2):165-172.

20. Rasbash D.J. The extinction of fires by water sprays. Fire Research Abstracts and Reviews. 1962; 4:28-52.

21. Williams F.A. A unified view of fire suppression. Journal of Fire and Flammability. 1974; 5:54-63.

22. Bryan J.L. Fire Suppression and Detection Systems. Beverley Hills, California, Glencoe Press, 1974; 409.

23. Yao C. Development of large-drop sprinklers. FMRC Technical Report Serial No. 22476. Norwood, MA, Factory Mutual Research Corporation, 1976.

24. Bullen M.L. The effect of a sprinkler on the stability of a smoke layer beneath a ceiling. Fire Technology. 1977; 13:21-34. DOI: 10.1007/BF02338883

25. Yao C. Application of sprinkler technology. Workshop on Engineering Applications of Fire Technology held at the National Bureau of Standards. 1980.

26. Fire Protection Handbook: Fifteenth Edition. National Fire Protection Association, 1981; 50.

27. Tanklevskiy L., Tsoy A., Snegirev A. Electrically controlled dynamic sprinkler activation: Computational assessment of potential efficiency. Fire Safety Journal. 2017; 91:614-623. DOI: 10.1016/j.firesaf.2017.04.019

28. Tanklevskiy L., Vasiliev M., Meshman L., Snegirev A., Tsoi A. A novel methodology of electrically controlled sprinkler activation. Proceedings of the 13th International conference Interflam 2013 (Royal Holloway College University of London, UK, 24-26 June). 2013; 503-508.

29. Tarantsev A.A., Tanklevskiy L.T., Snegirev A.Yu., Tsoy А.S., Kopylov S.N., Meshman L.M. Assessment of the sprinkler installation efficiency. Fire Safety. 2015; 1:72-79. (rus.).

30. Koroleva L.A., Tarantsev A.A., Grudanova O.V. On the economic assessment of two ways to modernize fire extinguishing installations. Problems of Technosphere Risk Management. 2007; 1:38-42. (rus.).

31. Meshman L.M., Snegirev A.Yu., Tanklevskiy L.T., Tarantsev A.A. On the possibility of the use of plastic pipes sprinkler automatic fire extinguishing installations. Pozharovzryvobezopasnost/Fire and Explosion Safety. 2014; 23(10):73-78. (rus.).

32. Artamonov V.S., Grudanova O.V., Tarantsev A.A. Refined calculation procedure for single level branched hydraulic networks. Pozharovzryvobezopasnost/Fire and Explosion Safety. 2008; 17(3):77-83. (rus.).

33. Tsoi A., Snegirev A., Tanklevskiy L., Sheinman I. Flame suppression by water sprays: exploring capabilities and failures of FDS. Proceedings of the Seventh International Seminar Fire and Explosion Hazards. 2013; 482-491. DOI: 10.3850/978-981-07-5936-0_07-05

34. Babikov I.A., Tanklevsky A.L., Tarantsev A.A. Determination method of sprinklers with electrical activation in case of internal fire. Problems of Technosphere Risk Management. 2019; 3(51):34-41. (rus.).

35. Xin Y., Burchesky K., De Vries J., Magistrale H., Zhou X., D’Aniello S. SMART sprinkler protection for highly challenging fires — part 1: system design and function evaluation. Fire Technology. 2017; 53:1847-1884. DOI: 10.1007/s10694-017-0662-2

36. Drysdale D. An Introduction to Fire Dynamics. Chichester, John Wiley & Sons, 1985; 440.

37. Snegirev A.Yu., Tanklevskii L.T. The macrokinetics of indoor fire. High Temperature. 1998; 36(5):737-743.

38. Snegirev A.Yu., Tanklevskii L.T. Numerical simulation of turbulent convection of gas indoors in the presence of a source of ignition. High Temperature. 1998; 36(6):949-959.

39. Markus E., Snegirev A., Kuznetsov E., Tanklevskiy L. Application of the thermal pyrolysis model to predict flame spread over continuous and discrete fire load. Fire Safety Journal. 2019; 108:102825. DOI: 10.1016/j.firesaf.2019.102825

40. Alpert R.L. Ceiling Jet Flows. SFPE Handbook of Fire Protection Engineering. Quincy, National Fire Protection Association, 2002; 2-18-2-31.

41. The application manual of “Methods for determining the calculated values of fire risk in buildings, constructions and structures of various classes of functional fire hazard”. Moscow, VNIIPO of EMERCOM of Russia, 2012. (rus.).

42. Linnik Yu.V. The least squares method and the basics of the mathematical-statistical theory of observation processing. Moscow, Fizmatgis Publ., 1962; 349. (rus.).