A Method for Determining the Impact of Ambient Temperature on an Electrical Cable during a Fire

Evaluating environmental conditions that trigger fire-fighting equipment is one of the primary design tasks that have to be taken into account when engineering electrical systems supplying such devices. All of the solutions are aimed at, among others, preserving environmental parameters in a buildin...

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Autores principales:	Bogdan Perka, Karol Piwowarski
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	electrical wiring fire temperature fire-fighting systems heating safety temperature model Technology T
Acceso en línea:	https://doaj.org/article/4a54116503664c7c90202dbc54d3abfb
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spelling	oai:doaj.org-article:4a54116503664c7c90202dbc54d3abfb2021-11-11T16:01:01ZA Method for Determining the Impact of Ambient Temperature on an Electrical Cable during a Fire10.3390/en142172601996-1073https://doaj.org/article/4a54116503664c7c90202dbc54d3abfb2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7260https://doaj.org/toc/1996-1073Evaluating environmental conditions that trigger fire-fighting equipment is one of the primary design tasks that have to be taken into account when engineering electrical systems supplying such devices. All of the solutions are aimed at, among others, preserving environmental parameters in a building being on fire for an assumed time and at a level enabling safe evacuation. These parameters include temperature, thermal radiation, visibility range, oxygen concentration, and environmental toxicity. This article presents a new mathematical model for heat exchange between the environment and an electric cable under thermal conditions exceeding permissible values for commonly used non-flammable installation cables. The method of analogy between thermal and electrical systems was adopted for modelling heat flow. Determining how the thermal conductivity of the cable and the thermal capacity of a conductor-insulation system can be applied to calculate the wire temperature depending on the heating time t and distance x from the heat source is discussed. Thermal conductivity and capacity were determined based on experimental tests for halogen-free flame-retardant (HFFR) cables with wire cross-sections of 2.5, 4.0, and 6.0 mm<sup>2</sup>. The conducted experimental tests enable verifying the results calculated by the mathematical model.Bogdan PerkaKarol PiwowarskiMDPI AGarticleelectrical wiringfire temperaturefire-fighting systemsheatingsafetytemperature modelTechnologyTENEnergies, Vol 14, Iss 7260, p 7260 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electrical wiring fire temperature fire-fighting systems heating safety temperature model Technology T
spellingShingle	electrical wiring fire temperature fire-fighting systems heating safety temperature model Technology T Bogdan Perka Karol Piwowarski A Method for Determining the Impact of Ambient Temperature on an Electrical Cable during a Fire
description	Evaluating environmental conditions that trigger fire-fighting equipment is one of the primary design tasks that have to be taken into account when engineering electrical systems supplying such devices. All of the solutions are aimed at, among others, preserving environmental parameters in a building being on fire for an assumed time and at a level enabling safe evacuation. These parameters include temperature, thermal radiation, visibility range, oxygen concentration, and environmental toxicity. This article presents a new mathematical model for heat exchange between the environment and an electric cable under thermal conditions exceeding permissible values for commonly used non-flammable installation cables. The method of analogy between thermal and electrical systems was adopted for modelling heat flow. Determining how the thermal conductivity of the cable and the thermal capacity of a conductor-insulation system can be applied to calculate the wire temperature depending on the heating time t and distance x from the heat source is discussed. Thermal conductivity and capacity were determined based on experimental tests for halogen-free flame-retardant (HFFR) cables with wire cross-sections of 2.5, 4.0, and 6.0 mm<sup>2</sup>. The conducted experimental tests enable verifying the results calculated by the mathematical model.
format	article
author	Bogdan Perka Karol Piwowarski
author_facet	Bogdan Perka Karol Piwowarski
author_sort	Bogdan Perka
title	A Method for Determining the Impact of Ambient Temperature on an Electrical Cable during a Fire
title_short	A Method for Determining the Impact of Ambient Temperature on an Electrical Cable during a Fire
title_full	A Method for Determining the Impact of Ambient Temperature on an Electrical Cable during a Fire
title_fullStr	A Method for Determining the Impact of Ambient Temperature on an Electrical Cable during a Fire
title_full_unstemmed	A Method for Determining the Impact of Ambient Temperature on an Electrical Cable during a Fire
title_sort	method for determining the impact of ambient temperature on an electrical cable during a fire
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4a54116503664c7c90202dbc54d3abfb
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A Method for Determining the Impact of Ambient Temperature on an Electrical Cable during a Fire

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