Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane)
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.ssci.2020.104748 http://hdl.handle.net/11449/196871 |
Resumo: | The concept of the Dispersion Safety Factor (DSF) was introduced by Vilchez et al. (2013, 2014) and has been revisited in this work. The DSF is defined as the ratio between the flammable region of the vapor cloud (set at a concentration equal to the low flammability level (LFL)) and the corresponding visible boundary of the cloud. We have used a computational fluid dynamics model (FLACS v.10.4) to simulate the dispersion of two liquefied flammable fuels (LNG and propane). DSF results have been analyzed using main effects and interaction plots, and a complementary metric (DSF50) has been introduced in order to establish more conservative threat areas in flammable vapor cloud scenarios. We have observed an interaction between relative humidity and wind velocity for DSF in the low-to-medium range of RH and wind velocity values. Four regression models have been proposed for the computation of DSF and DSF50 for LNG and propane dependent on ambient wind velocity and relative humidity. Contour plots have been prepared to be used as a practical tool, because through the reading of these plots the DSF (and DSF50) can be obtained immediately given wind velocity and relative humidity data. |
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Repositório Institucional da UNESP |
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Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane)FLAGSCFD simulationWind velocityRelative humidityVisible cloudThe concept of the Dispersion Safety Factor (DSF) was introduced by Vilchez et al. (2013, 2014) and has been revisited in this work. The DSF is defined as the ratio between the flammable region of the vapor cloud (set at a concentration equal to the low flammability level (LFL)) and the corresponding visible boundary of the cloud. We have used a computational fluid dynamics model (FLACS v.10.4) to simulate the dispersion of two liquefied flammable fuels (LNG and propane). DSF results have been analyzed using main effects and interaction plots, and a complementary metric (DSF50) has been introduced in order to establish more conservative threat areas in flammable vapor cloud scenarios. We have observed an interaction between relative humidity and wind velocity for DSF in the low-to-medium range of RH and wind velocity values. Four regression models have been proposed for the computation of DSF and DSF50 for LNG and propane dependent on ambient wind velocity and relative humidity. Contour plots have been prepared to be used as a practical tool, because through the reading of these plots the DSF (and DSF50) can be obtained immediately given wind velocity and relative humidity data.Spanish Ministry of Economy and CompetitivenessFEDER fundsUniv Politecn Cataluna, Ctr Technol Risk Studies CERTEC, Dept Chem Engn, BarcelonaTech, Av Eduard Maristany 16, Barcelona 08019, Catalonia, SpainSao Paulo State Univ UNESP, Dept Ind Engn, Geraldo Alckmin 519, Itapeva 18409010, SP, BrazilSao Paulo State Univ UNESP, Dept Ind Engn, Geraldo Alckmin 519, Itapeva 18409010, SP, BrazilSpanish Ministry of Economy and Competitiveness: CTQ2017-85990-RElsevier B.V.Univ Politecn CatalunaUniversidade Estadual Paulista (Unesp)Agueda, AlbaSubirana, JoanPastor, ElsaMiralles Schleder, Adriana [UNESP]Planas, Eulalia2020-12-10T19:58:46Z2020-12-10T19:58:46Z2020-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article12http://dx.doi.org/10.1016/j.ssci.2020.104748Safety Science. Amsterdam: Elsevier, v. 128, 12 p., 2020.0925-7535http://hdl.handle.net/11449/19687110.1016/j.ssci.2020.104748WOS:000531901000013Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSafety Scienceinfo:eu-repo/semantics/openAccess2021-10-23T09:20:18Zoai:repositorio.unesp.br:11449/196871Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:32:48.383711Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane) |
title |
Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane) |
spellingShingle |
Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane) Agueda, Alba FLAGS CFD simulation Wind velocity Relative humidity Visible cloud |
title_short |
Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane) |
title_full |
Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane) |
title_fullStr |
Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane) |
title_full_unstemmed |
Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane) |
title_sort |
Revisiting the dispersion safety factor (DSF) for vapor clouds of liquefied flammable gases (LNG and propane) |
author |
Agueda, Alba |
author_facet |
Agueda, Alba Subirana, Joan Pastor, Elsa Miralles Schleder, Adriana [UNESP] Planas, Eulalia |
author_role |
author |
author2 |
Subirana, Joan Pastor, Elsa Miralles Schleder, Adriana [UNESP] Planas, Eulalia |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Univ Politecn Cataluna Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Agueda, Alba Subirana, Joan Pastor, Elsa Miralles Schleder, Adriana [UNESP] Planas, Eulalia |
dc.subject.por.fl_str_mv |
FLAGS CFD simulation Wind velocity Relative humidity Visible cloud |
topic |
FLAGS CFD simulation Wind velocity Relative humidity Visible cloud |
description |
The concept of the Dispersion Safety Factor (DSF) was introduced by Vilchez et al. (2013, 2014) and has been revisited in this work. The DSF is defined as the ratio between the flammable region of the vapor cloud (set at a concentration equal to the low flammability level (LFL)) and the corresponding visible boundary of the cloud. We have used a computational fluid dynamics model (FLACS v.10.4) to simulate the dispersion of two liquefied flammable fuels (LNG and propane). DSF results have been analyzed using main effects and interaction plots, and a complementary metric (DSF50) has been introduced in order to establish more conservative threat areas in flammable vapor cloud scenarios. We have observed an interaction between relative humidity and wind velocity for DSF in the low-to-medium range of RH and wind velocity values. Four regression models have been proposed for the computation of DSF and DSF50 for LNG and propane dependent on ambient wind velocity and relative humidity. Contour plots have been prepared to be used as a practical tool, because through the reading of these plots the DSF (and DSF50) can be obtained immediately given wind velocity and relative humidity data. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-10T19:58:46Z 2020-12-10T19:58:46Z 2020-08-01 |
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 |
http://dx.doi.org/10.1016/j.ssci.2020.104748 Safety Science. Amsterdam: Elsevier, v. 128, 12 p., 2020. 0925-7535 http://hdl.handle.net/11449/196871 10.1016/j.ssci.2020.104748 WOS:000531901000013 |
url |
http://dx.doi.org/10.1016/j.ssci.2020.104748 http://hdl.handle.net/11449/196871 |
identifier_str_mv |
Safety Science. Amsterdam: Elsevier, v. 128, 12 p., 2020. 0925-7535 10.1016/j.ssci.2020.104748 WOS:000531901000013 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Safety Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
12 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129217699774464 |