Evaluation of the influence of air humidity on the calculated explosion overpressure

Oleksii Roianov

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0001-7631-1030

Albert Katunin

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0003-2171-4558

Roman Melezhyk

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0001-6425-4147

Oleg Bogatov

Kharkiv National Automobile and Highway University

http://orcid.org/0000-0001-7342-7556

DOI: https://doi.org/10.52363/2524-0226-2022-36-23

Keywords: explosion and fire hazard, overpressure of explosion, flammable liquids, category of premises according to fire and explosion hazard

Аnnotation

An assessment of the effect of air humidity on the estimated excess pressure of the explosion was carried out during the determination of the category of industrial premises according to the explosion and fire hazard, in which flammable liquids are present, circulating and stored. The study provides data that testify to the quantitative indicators of the presence of water in the form of vapors and their dependence on ambient temperature and humidity. On a specific example with a flammable liquid, the calculation of the overpressure of the explosion was carried out and the hypothesis was put forward that the presence of humidity in the room where there are flammable and combustible liquids can affect the result of determining the calculated overpressure of the explosion, which, in turn, can lead to an incorrect determination categories of premises according to explosion and fire hazard. To confirm the proposed hypothesis, first the calculations were carried out without taking into account the air humidity, and then the assessment was carried out taking into account the air humidity in the room. The initial values of air humidity were chosen in accordance with the requirements for ensuring environmental parameters in production premises. Taking this into account, calculations of mixtures of flammable liquid vapors and water vapors were carried out. The research was based only on the use of theoretical methods, without the use of experimental research. As a result of research, results were obtained that confirmed the hypothesis regarding the influence of humidity on the value of the calculated excess pressure of the explosion. An error in determining the calculated overpressure occurs and requires additional research.

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