Defining patterns of heat transfer through the fire-protected fabric to wood

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.245713

Keywords:

fire protection of wood, swelling coating, thermal conductivity, surface treatment, thermal-physical properties

Abstract

Under the thermal action on wood when applying a protective screen made from fire-retardant fabric, the process of temperature transfer is natural. It has been proven that depending on the thermal properties of the coating of fire-proof fabric, this could lead to varying degrees of heat transfer. Therefore, it becomes necessary to study the conditions for establishing low thermal conductivity and establishing a mechanism that inhibits heat transfer to wood. Given this, a mathematical model has been built of the process of heat transfer to wood when it is protected by a screen made of fire-proof fabric. According to the experimental data on determining the temperature on the non-heated surface of the fabric and the resulting dependences, the density of the heat flow transmitted to wood through fire-proof fabric was determined. Thus, with an increase in the temperature, the density of the heat flow to the surface of the wood through a protective screen made of fire-proof protected coating based on "Firewall-Attic" increases to a value above 16 kW/m2, which is not sufficient for ignition of wood. Instead, the density of the heat flow through the protective screen of fire-proof fabric protected by the "Firewall-Wood"-based coating did not exceed 14 kW/m2. This makes it possible to argue about the compliance of the detected mechanism of formation of heat-insulating properties in the protection of wood and the practical attractiveness of the proposed technological solutions. Thus, the peculiarities of inhibition of the process of heat transfer to wood through a protective screen made of fire-proof fabric under the action of a radiation panel imply the formation of a heat-insulating layer of coked cellular material when decomposing the coating. Thus, on the surface of the fire-proof fabric, a temperature above 280 °C was achieved and, on an untreated surface of the fabric, it did not exceed 220 °C, which is insufficient for the ignition of wood.

Author Biographies

Yuriy Tsapko, National University of Life and Environmental Sciences of Ukraine; Kyiv National University of Construction and Architecture

Doctor of Technical Sciences, Professor

Department of Technology and Design of Wood Products

V. D. Glukhovsky Scientific Research Institute for Binders and Materials

Аleksii Tsapko, Ukrainian State Research Institute "Resource"; Kyiv National University of Construction and Architecture

PhD, Senior Researcher

Department of Research of Quality and Conditions of Storage of oil Products and Industrial Group of Goods

V. D. Glukhovsky Scientific Research Institute for Binders and Materials

Olga Bondarenko, Kyiv National University of Construction and Architecture

PhD, Senior Researcher

Department of Building Materials

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Published

2021-12-29

How to Cite

Tsapko, Y., Tsapko А., & Bondarenko, O. (2021). Defining patterns of heat transfer through the fire-protected fabric to wood. Eastern-European Journal of Enterprise Technologies, 6(10 (114), 49–56. https://doi.org/10.15587/1729-4061.2021.245713