Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.fuel.2018.03.181 http://hdl.handle.net/11449/170865 |
Resumo: | The present work studies the flammability limits of combustible–diluent–air mixtures at 25 °C and 1 atm pressure. The diluent species, considered in this study, were nitrogen and carbon dioxide. A factor called kFL was obtained from mass and energy conservation, this factor relates the flammability limit of a combustible–air mixture to that of a combustible–diluent–air mixture. The factor kFL varies with diluent concentration. Nevertheless, it was shown that an average value of this factor (kFL av) can represent, with good accuracy, the variation of the flammability limits with diluent concentration. An empirical method to determine the flammability limits of combustible–diluent–air mixtures was developed. The method approximates kFL av by means of correlations. For the total set of experimental data, it was found that, for dilution with N2 and CO2 respectively: (a) at the LFL the Average of the relative errors (AARE) were 4.02% and 7.01%, the squared correlation coefficients (R2) were 0.9833 and 0.9660; and (b) at the UFL the AAREs were 3.91% and 5.57%, the R2 were 0.9920 and 0.9792. At the Fuel Inertization Point (FIP) there is an inert concentration above which the mixture is non-flammable. A method was developed to determine the diluent mole fraction in the combustible–inert mixture at the FIP. The AAREs of 0.82% and 1.95% were obtained for dilution with N2 and CO2, respectively. |
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Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in airDiluent effectFlammability limitsFuel inertization pointThe present work studies the flammability limits of combustible–diluent–air mixtures at 25 °C and 1 atm pressure. The diluent species, considered in this study, were nitrogen and carbon dioxide. A factor called kFL was obtained from mass and energy conservation, this factor relates the flammability limit of a combustible–air mixture to that of a combustible–diluent–air mixture. The factor kFL varies with diluent concentration. Nevertheless, it was shown that an average value of this factor (kFL av) can represent, with good accuracy, the variation of the flammability limits with diluent concentration. An empirical method to determine the flammability limits of combustible–diluent–air mixtures was developed. The method approximates kFL av by means of correlations. For the total set of experimental data, it was found that, for dilution with N2 and CO2 respectively: (a) at the LFL the Average of the relative errors (AARE) were 4.02% and 7.01%, the squared correlation coefficients (R2) were 0.9833 and 0.9660; and (b) at the UFL the AAREs were 3.91% and 5.57%, the R2 were 0.9920 and 0.9792. At the Fuel Inertization Point (FIP) there is an inert concentration above which the mixture is non-flammable. A method was developed to determine the diluent mole fraction in the combustible–inert mixture at the FIP. The AAREs of 0.82% and 1.95% were obtained for dilution with N2 and CO2, respectively.São Paulo University (UNESP) School of Engineering Energy DepartmentFederal University of Itajubá – UNIFEI. Mechanical Engineering Institute – IEM, Av BPS 1303São Paulo University (UNESP) School of Engineering Energy DepartmentUniversidade Estadual Paulista (Unesp)Mechanical Engineering Institute – IEMMendiburu, Andrés Z. [UNESP]de Carvalho, João A. [UNESP]Coronado, Christian R.2018-12-11T16:52:43Z2018-12-11T16:52:43Z2018-08-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article65-80application/pdfhttp://dx.doi.org/10.1016/j.fuel.2018.03.181Fuel, v. 226, p. 65-80.0016-2361http://hdl.handle.net/11449/17086510.1016/j.fuel.2018.03.1812-s2.0-850449656192-s2.0-85044965619.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengFuel1,891info:eu-repo/semantics/openAccess2023-10-14T06:09:46Zoai:repositorio.unesp.br:11449/170865Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:55:32.368447Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air |
title |
Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air |
spellingShingle |
Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air Mendiburu, Andrés Z. [UNESP] Diluent effect Flammability limits Fuel inertization point |
title_short |
Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air |
title_full |
Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air |
title_fullStr |
Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air |
title_full_unstemmed |
Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air |
title_sort |
Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air |
author |
Mendiburu, Andrés Z. [UNESP] |
author_facet |
Mendiburu, Andrés Z. [UNESP] de Carvalho, João A. [UNESP] Coronado, Christian R. |
author_role |
author |
author2 |
de Carvalho, João A. [UNESP] Coronado, Christian R. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Mechanical Engineering Institute – IEM |
dc.contributor.author.fl_str_mv |
Mendiburu, Andrés Z. [UNESP] de Carvalho, João A. [UNESP] Coronado, Christian R. |
dc.subject.por.fl_str_mv |
Diluent effect Flammability limits Fuel inertization point |
topic |
Diluent effect Flammability limits Fuel inertization point |
description |
The present work studies the flammability limits of combustible–diluent–air mixtures at 25 °C and 1 atm pressure. The diluent species, considered in this study, were nitrogen and carbon dioxide. A factor called kFL was obtained from mass and energy conservation, this factor relates the flammability limit of a combustible–air mixture to that of a combustible–diluent–air mixture. The factor kFL varies with diluent concentration. Nevertheless, it was shown that an average value of this factor (kFL av) can represent, with good accuracy, the variation of the flammability limits with diluent concentration. An empirical method to determine the flammability limits of combustible–diluent–air mixtures was developed. The method approximates kFL av by means of correlations. For the total set of experimental data, it was found that, for dilution with N2 and CO2 respectively: (a) at the LFL the Average of the relative errors (AARE) were 4.02% and 7.01%, the squared correlation coefficients (R2) were 0.9833 and 0.9660; and (b) at the UFL the AAREs were 3.91% and 5.57%, the R2 were 0.9920 and 0.9792. At the Fuel Inertization Point (FIP) there is an inert concentration above which the mixture is non-flammable. A method was developed to determine the diluent mole fraction in the combustible–inert mixture at the FIP. The AAREs of 0.82% and 1.95% were obtained for dilution with N2 and CO2, respectively. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T16:52:43Z 2018-12-11T16:52:43Z 2018-08-15 |
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.fuel.2018.03.181 Fuel, v. 226, p. 65-80. 0016-2361 http://hdl.handle.net/11449/170865 10.1016/j.fuel.2018.03.181 2-s2.0-85044965619 2-s2.0-85044965619.pdf |
url |
http://dx.doi.org/10.1016/j.fuel.2018.03.181 http://hdl.handle.net/11449/170865 |
identifier_str_mv |
Fuel, v. 226, p. 65-80. 0016-2361 10.1016/j.fuel.2018.03.181 2-s2.0-85044965619 2-s2.0-85044965619.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Fuel 1,891 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
65-80 application/pdf |
dc.source.none.fl_str_mv |
Scopus 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_ |
1808128436950007808 |