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Naslov:Thermal characterisation of the cooling phase of post-flashover compartment fires
Avtorji:ID Lucherini, Andrea (Avtor)
ID Jovanović, Balša (Avtor)
ID Torero, Jose L. (Avtor)
ID Van Coile, Ruben (Avtor)
ID Merci, Bart (Avtor)
Datoteke:.pdf PDF - Predstavitvena datoteka, prenos (6,40 MB)
MD5: C107363B902ECC7121601F15C705C181
 
URL URL - Izvorni URL, za dostop obiščite https://doi.org/10.1016/j.ijthermalsci.2024.108933
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo ZAG - Zavod za gradbeništvo Slovenije
Povzetek:The main characteristics of the cooling phase of post-flashover compartment fires are studied using a simplified first-principles heat transfer approach to establish key limitations of more traditional methodologies (e.g., Eurocode). To this purpose, the boundary conditions during cooling are analysed. To illustrate the importance of a first-principles approach, a detailed review of the literature is presented followed by the presentation of a simplified numerical model. The model is constructed to calculate first-order thermal conditions during the cooling phase. The model is not intended to provide a precise calculation method but rather baseline estimates that incorporate all key thermal inputs and outputs. First, the thermal boundary conditions in the heating phase are approximated with a single (gas) temperature and the Eurocode parametric fire curves, to provide a consistent initial condition for the cooling phase and to be able to compare the traditional approach to the first- principles approach. After fuel burnout, the compartment gases become optically thin and temperatures decay to ambient values, while the compartment solid elements slowly cool down. For simplicity, convective cooling of the compartment linings is estimated using a constant convective heat transfer coefficient and all linings surfaces are assumed to have the same temperature (no net radiative heat exchange). All structural elements are assumed to be thermally thick. While these simplifications introduce quantitative errors, they enable an analytical solution for transient heat conduction in a semi-infinite solid that captures all key heat transfer processes. Comparisons between the results obtained using both approaches highlight how, even when considering the same fire energy input, the thermal boundary conditions according to the Eurocode parametric fire curves lead to an increase energy accumulated in the solid after fuel burnout and a delay in the onset of cooling. This is not physically correct, and it may lead to misrepresentation of the impact of post-flashover fires on structural behaviour.
Ključne besede:cooling phase, fire decay, fire dynamics, compartment fires, structural fire engineering, fire safety
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:02.02.2024
Založnik:Elsevier
Leto izida:2024
Št. strani:str. 1-15
Številčenje:Vol. 199, [article no.] 108933
PID:20.500.12556/DiRROS-18678 Novo okno
UDK:620.1/.2
ISSN pri članku:1778-4166
DOI:10.1016/j.ijthermalsci.2022.107922 Novo okno
COBISS.SI-ID:191239939 Novo okno
Avtorske pravice:© 2024 The Authors. Published by Elsevier Masson SAS.
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 3. 4. 2024;
Datum objave v DiRROS:15.04.2024
Število ogledov:889
Število prenosov:391
Metapodatki:XML DC-XML DC-RDF
:
LUCHERINI, Andrea, JOVANOVIĆ, Balša, TORERO, Jose L., VAN COILE, Ruben in MERCI, Bart, 2024, Thermal characterisation of the cooling phase of post-flashover compartment fires. International journal of thermal sciences [na spletu]. 2024. Vol. 199, no. 108933, p. 1–15. [Dostopano 28 april 2025]. DOI 10.1016/j.ijthermalsci.2022.107922. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=18678
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Gradivo je del revije

Naslov:International journal of thermal sciences
Skrajšan naslov:Int. j. therm. sci.
Založnik:Elsevier
ISSN:1778-4166
COBISS.SI-ID:118795267 Novo okno

Gradivo je financirano iz projekta

Financer:EC - European Commission
Program financ.:H2020
Številka projekta:952395
Naslov:Fire-safe Sustainable Built Environment
Akronim:FRISSBE
Financer:EC - European Commission
Program financ.:HE
Številka projekta:101064840
Naslov:Fundamental advances for the fire safety of tall timber structures including the fire decay phase
Akronim:FIReSafeTimber

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:31.01.2024
Vezano na:Text and Data Mining valid from 2024-05-01 Version of Record valid from 2024-01-31

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:faza hlajenja, razpadanje požara, dinamika požara, požari v oddelkih, konstrukcijski požarni inženiring, požarna varnost


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