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About building a revised combined graphics the calculation of forces and means to extinguish the fire

Journal: Pozharovzryvobezopastnost/Fire and Explosion Safety (Vol.27, No. 2)

Publication Date:

Authors : ;

Page : 82-92

Keywords : ;

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Abstract

Article belongs to fire tactics, her materials can be used when calculating forces and means necessary for suppression of the alleged fire of a class A at drawing up plans of fire extinguishing for the most significant objects. The existing order of drawing up the combined schedules (i. e. schedules on which it is at the same time presented the loudspeaker of the fire area Sf, the area of suppression of Ssupp, demanded Qdem and the actual Qfact of a consumption of fire extinguishing substance) for calculation of forces and means has a number of shortcomings. Namely: § doesn't consider dynamics of perimeter of the protecting designs which are affected by dangerous factors of the fire and having limited limits of fire resistance; § doesn't provide (as a rule) assessment of time of elimination of the open burning causing the general duration of fire extinguishing; § doesn't consider the volume of the fire extinguishing substance (water) spent for suppression that is important at the limited capacity of reservoirs; § assumes carrying out labor-consuming calculations, and the computer programs convenient for experts and students, are practically absent or sin with inaccuracies. In this regard the authors who are experts in the field of fire tactics have offered a method of creation of the specified combined schedules in which besides the Sf, Ssupp, Qdem and Qfact parameters, dynamics of the “warmed” perimeter and amount of the spent fire extinguishing substance is considered. The method is based on the known provisions of fire and tactical calculations and allows to estimate duration of impact of a flame on room walls, the general time of suppression and volume (weight) of the spent fire extinguishing substance. The method of creation of the specified combined schedule is realized in the form of the computer program in a format of the EXE-file which isn't demanding the specialized software and high qualification of users. In article examples of creation of the specified combined schedules consistent with experience of many specialists in suppression of the fires are given. The method and the program have been successfully tested and used in the educational process.

Last modified: 2018-10-16 21:56:43