Determining the fireproof limit for the heat protective coating of the gas generator in a hydrogen storage and supply system

Authors

DOI:

https://doi.org/10.15587/1729-4061.2025.332546

Keywords:

hydrogen systems, gas generator, fire, heat-protective coating, fire resistance limit, Laplace transform

Abstract

This work considers the task to prevent fires in hydrogen storage and operation systems. The subject of the study is the properties of the heat-protective coating of the gas generator in the hydrogen storage and supply system. The fire resistance limit is used as such a property. The set of heat-protective coating and the wall of the gas generator is considered as a thermodynamic system with two inputs. The signal at one input reflects the influence of thermal factors of the fire, and the signal at the second input corresponds to the thermal state of the gas generator cavity.

A mathematical description of such a thermodynamic system has been constructed, which is represented in operator form using the integral Laplace transform. A feature of such a mathematical notation is that it includes hyperbolic functions of an irrational argument. An approximation of mathematical models of the thermodynamic system was carried out and it is shown that these models, which are transfer functions, belong to fractional-rational functions with third-order Hurwitz polynomials. The approximation accuracy is 3.8%.

An expression for the reaction of a thermodynamic system has been derived, provided that the influence of thermal factors of a fire is described by an arbitrary function of time, and the thermal state of the gas generator cavity is described by the Heaviside function. To construct this expression, the Borel theorem and auxiliary functions are used, the parameters of which are the parameters of the roots of the algebraic Hurwitz equation.

Examples of determining the fire resistance limit for the heat-protective coating of the gas generator in the hydrogen storage and supply system for the characteristic conditions of its operation are given. It is shown that the fire resistance limit of such a coating is 462.8 s at a critical temperature of 320°C under the condition that the influence of thermal factors of a fire is linear (the generalized temperature change rate is 2.0°C s-1). In this case, the thermal state of the gas generator cavity is stationary and is characterized by a temperature of 60°C

Author Biographies

Yuriy Abramov

Doctor of Technical Sciences, Professor

Oleksii Basmanov, National University of Civil Defence of Ukraine

Doctor of Technical Sciences, Professor, Leading Researcher

Scientific and Testing Department of Fire Protection and Fire Extinguishing Systems Research

Scientific and Research Center of Research and Testing

Institute of Scientific Research on Civil Protection

Valentina Krivtsova, National University of Civil Defence of Ukraine

Doctor of Technical Sciences, Professor

Department of Physical and Mathematical Disciplines

Andriy Mikhayluk, O.M. Beketov National University of Urban Economy in Kharkiv

PhD, Associate Professor, Senior Researcher

Department of Occupational and Life Safety

Yevhen Makarov, National University of Civil Defence of Ukraine

PhD, Deputy Head of Department

Department of Special Training and Underwater Mine Clearance

Volodymyr Abrakitov, O.M. Beketov National University of Urban Economy in Kharkiv

PhD, Associate Professor

Department of Occupational and Life Safety

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Determining the fireproof limit for the heat protective coating of the gas generator in a hydrogen storage and supply system

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Published

2025-06-25

How to Cite

Abramov, Y., Basmanov, O., Krivtsova, V., Mikhayluk, A., Makarov, Y., & Abrakitov, V. (2025). Determining the fireproof limit for the heat protective coating of the gas generator in a hydrogen storage and supply system. Eastern-European Journal of Enterprise Technologies, 3(10 (135), 26–34. https://doi.org/10.15587/1729-4061.2025.332546

Issue

Vol. 3 No. 10 (135) (2025): Ecology

Section

Ecology

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Copyright (c) 2025 Yuriy Abramov, Oleksii Basmanov, Valentina Krivtsova, Andriy Mikhayluk, Yevhen Makarov, Volodymyr Abrakitov

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