Incorporation of phase change materials in fire protective clothing considering the presence of water
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/10216/143734 |
Resumo: | When firefighters face a heat exposure, free water may be present in the fire protective clothing (FPC). Recently, the incorporation of Phase Change Materials (PCMs) into FPC has shown great promise to increase thermal performance when in the dry state. However, the presence of water in firefighting garments is expected and how this alters the thermal behavior of a PCM FPC assembly still remains to be discussed in the literature. Hence, this study concerns the effect of free water presence in the outer shell and/or thermal inner of a PCM FPC assembly consisting of 3 layers. A new mathematical model is proposed where the PCM is assumed to be incorporated in the thermal inner. A numerical analysis is performed where PCM textile latent heat, water distribution, and heat flux intensity are varied. Skin temperature, skin heat flux, and PCM liquid fraction profiles are obtained along with second-degree burn times to measure thermal performance. It is found that steam condensation at the skin reduces PCM liquid fraction at second-degree burn time, when compared to the dry case. This study tends to shine a light on the importance of considering moisture management in PCM FPC assemblies so as to promote maximum PCM efficiency. |
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Incorporation of phase change materials in fire protective clothing considering the presence of waterWhen firefighters face a heat exposure, free water may be present in the fire protective clothing (FPC). Recently, the incorporation of Phase Change Materials (PCMs) into FPC has shown great promise to increase thermal performance when in the dry state. However, the presence of water in firefighting garments is expected and how this alters the thermal behavior of a PCM FPC assembly still remains to be discussed in the literature. Hence, this study concerns the effect of free water presence in the outer shell and/or thermal inner of a PCM FPC assembly consisting of 3 layers. A new mathematical model is proposed where the PCM is assumed to be incorporated in the thermal inner. A numerical analysis is performed where PCM textile latent heat, water distribution, and heat flux intensity are varied. Skin temperature, skin heat flux, and PCM liquid fraction profiles are obtained along with second-degree burn times to measure thermal performance. It is found that steam condensation at the skin reduces PCM liquid fraction at second-degree burn time, when compared to the dry case. This study tends to shine a light on the importance of considering moisture management in PCM FPC assemblies so as to promote maximum PCM efficiency.20232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10216/143734eng1290-072910.1016/j.ijthermalsci.2022.107870André Fonseca MalaquiasSoraia NevesCampos, JBLMinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-29T12:35:49Zoai:repositorio-aberto.up.pt:10216/143734Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:23:13.574174Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Incorporation of phase change materials in fire protective clothing considering the presence of water |
title |
Incorporation of phase change materials in fire protective clothing considering the presence of water |
spellingShingle |
Incorporation of phase change materials in fire protective clothing considering the presence of water André Fonseca Malaquias |
title_short |
Incorporation of phase change materials in fire protective clothing considering the presence of water |
title_full |
Incorporation of phase change materials in fire protective clothing considering the presence of water |
title_fullStr |
Incorporation of phase change materials in fire protective clothing considering the presence of water |
title_full_unstemmed |
Incorporation of phase change materials in fire protective clothing considering the presence of water |
title_sort |
Incorporation of phase change materials in fire protective clothing considering the presence of water |
author |
André Fonseca Malaquias |
author_facet |
André Fonseca Malaquias Soraia Neves Campos, JBLM |
author_role |
author |
author2 |
Soraia Neves Campos, JBLM |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
André Fonseca Malaquias Soraia Neves Campos, JBLM |
description |
When firefighters face a heat exposure, free water may be present in the fire protective clothing (FPC). Recently, the incorporation of Phase Change Materials (PCMs) into FPC has shown great promise to increase thermal performance when in the dry state. However, the presence of water in firefighting garments is expected and how this alters the thermal behavior of a PCM FPC assembly still remains to be discussed in the literature. Hence, this study concerns the effect of free water presence in the outer shell and/or thermal inner of a PCM FPC assembly consisting of 3 layers. A new mathematical model is proposed where the PCM is assumed to be incorporated in the thermal inner. A numerical analysis is performed where PCM textile latent heat, water distribution, and heat flux intensity are varied. Skin temperature, skin heat flux, and PCM liquid fraction profiles are obtained along with second-degree burn times to measure thermal performance. It is found that steam condensation at the skin reduces PCM liquid fraction at second-degree burn time, when compared to the dry case. This study tends to shine a light on the importance of considering moisture management in PCM FPC assemblies so as to promote maximum PCM efficiency. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023 2023-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://hdl.handle.net/10216/143734 |
url |
https://hdl.handle.net/10216/143734 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1290-0729 10.1016/j.ijthermalsci.2022.107870 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799135534104182784 |