METHOD FOR EVALUATING THE EFFICIENCY OF GAS ANALYZERS WHEN PROVIDING FIRE SAFETY OF GAS-POWERED VEHICLE MAINTENANCE FACILITIES

Abstract

Газоанализаторы целесообразно использовать для обеспечения пожарной безопасности объектов производственного и складского назначения с обращением на них горючих газов в сжиженном и (или) в сжатом состоянии (объекты обслуживания автотранспортных средств, работающих на газомоторном топливе). В существующей методике расчета пожарного риска для взрывоопасных объектов эффективность газоанализаторов не учитывается. Предложенный авторами метод основан на определении численного значения эффективной работы газоанализаторов (или численного значения индивидуального пожарного риска при использовании газоанализаторов, в зависимости от ситуации) с учетом вероятности безотказной работы газоанализатора и вероятности эффективного размещения этих устройств. Он позволяет учитывать применение технических средств обеспечения пожарной безопасности, в том числе газоанализаторов, при проведении расчета пожарного риска и разработке специальных технических условий для объекта защиты. The article justifies the developed method for assessment of efficiency of gas analyzers when determining fire safety of the object. The evaluation of the effective use of technical tools and organizational systems was considered earlier, while the method for determining the effectiveness of the system (including in the form of effective use) through the evaluation of technical parameters, both the system itself and its elements, was substantiated. Extending the proposed method in terms of applying the proposed approach to evaluate the performance of gas analysers, a dimensionless complex is formed by the dimensionality analysis method. The principle of a dimensionless complex formation consists in the formation of simplices reflecting the degree of desired result achievement the through the ratio of the actual value of each parameter to its required value. Based on the numerical value of the ratio of the required efficiency of gas analyzers to the actual one or (depending on the purpose of the calculation) the ratio of the actual calculated value of the individual fire risk to the safe (normative) one, a four-criteria approach to equipping the facility with fire protection means is applied. There are given numerical values of the criteria at which it is necessary to use certain TSOPB in conjunction with gas analyzers, depending on the probability of effective operation of gas analyzers, but this approach can also be used to determine the required probability of effective operation of gas analyzers, i.e. the actual required number of gas analyzers, their sensitivity, time between failures, etc. The proposed method is based on determining the numerical value of the probability of effective operation of gas analyzers (or the numerical value of individual fire risk when using gas analyzers, depending on the situation) taking into account the probability of failure-free operation of the gas analyzer and the probability of effective placement of these devices. The method defines and substantiates dependencies for calculating the probability of failure-free operation of gas analyzers and the probability of effective placement of these devices. An approach has been proposed to take into account the use of gas analyzers when ensuring fire safety of gas-powered vehicles storage and maintenance facilities in order to reduce the amount of individual fire risk. The method makes it possible to take into account the use of technical means for fire safety ensuring, in particular gas analyzers, including when developing special technical conditions for the object of protection.