Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas

Autores
Mariani, Nestor Javier; Martinez, Osvaldo Miguel; Barreto, Guillermo Fernando
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The results of an experimental investigation on heat transfer from a packed bed with cocurrent gas-liquid downflow to the wall are presented and analyzed in this contribution. The measurements cover the range of operating variables corresponding to the so-called trickle regime in beds presenting aspect ratios (tube to particle diameter ratio) from 4.67 to 34.26. Water and air were employed as model fluids. The heat transfer process was first analyzed by means of a two-dimensional pseudohomogeneous plug-flow model with two parameters, the effective radial thermal conductivity (ker) and the wall heat transfer coefficient (hw). ker is well correlated with liquid and gas Reynolds numbers and particle diameter, except for the lowest experimental aspect ratio (4.67). Instead, a meaningful correlation of hw stands only for aspect ratios larger than 15. These results are analyzed and the evidence points out to sustain the hypothesis that the model fails at low aspect ratios because an apparent contact resistance (1/hw) can no longer accommodate the effects of significant fluid by passing and finite size of the near-wall region. The experimental set of data were also used to develop a correlation for the overall heat transfer coefficient (ht), which can be employed satisfactorily to predict heat transfer rates in the whole range of variables here investigated. © 2001 Elsevier Science Ltd. All rights reserved.
Fil: Mariani, Nestor Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Fil: Martinez, Osvaldo Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina
Fil: Barreto, Guillermo Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina
Materia
Effective Thermal Conductivity
Heat Transfer
Radial Temperature Profile
Thermal Parameters
Trickle-Bed Reactors
Wall Heat Transfer Coefficient
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/61608
Acceder
id CONICETDig_8c6107e75df837976d825b6c2351ead8
oai_identifier_str oai:ri.conicet.gov.ar:11336/61608
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gasMariani, Nestor JavierMartinez, Osvaldo MiguelBarreto, Guillermo FernandoEffective Thermal ConductivityHeat TransferRadial Temperature ProfileThermal ParametersTrickle-Bed ReactorsWall Heat Transfer Coefficienthttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The results of an experimental investigation on heat transfer from a packed bed with cocurrent gas-liquid downflow to the wall are presented and analyzed in this contribution. The measurements cover the range of operating variables corresponding to the so-called trickle regime in beds presenting aspect ratios (tube to particle diameter ratio) from 4.67 to 34.26. Water and air were employed as model fluids. The heat transfer process was first analyzed by means of a two-dimensional pseudohomogeneous plug-flow model with two parameters, the effective radial thermal conductivity (ker) and the wall heat transfer coefficient (hw). ker is well correlated with liquid and gas Reynolds numbers and particle diameter, except for the lowest experimental aspect ratio (4.67). Instead, a meaningful correlation of hw stands only for aspect ratios larger than 15. These results are analyzed and the evidence points out to sustain the hypothesis that the model fails at low aspect ratios because an apparent contact resistance (1/hw) can no longer accommodate the effects of significant fluid by passing and finite size of the near-wall region. The experimental set of data were also used to develop a correlation for the overall heat transfer coefficient (ht), which can be employed satisfactorily to predict heat transfer rates in the whole range of variables here investigated. © 2001 Elsevier Science Ltd. All rights reserved.Fil: Mariani, Nestor Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; ArgentinaFil: Martinez, Osvaldo Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; ArgentinaFil: Barreto, Guillermo Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; ArgentinaPergamon-Elsevier Science Ltd2001-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/61608Mariani, Nestor Javier; Martinez, Osvaldo Miguel; Barreto, Guillermo Fernando; Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas; Pergamon-Elsevier Science Ltd; Chemical Engineering Science; 56; 21-22; 11-2001; 5995-60010009-2509CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/S0009-2509(01)00225-1info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0009250901002251info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:45:28Zoai:ri.conicet.gov.ar:11336/61608instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:45:28.59CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas
title Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas
spellingShingle Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas
Mariani, Nestor Javier
Effective Thermal Conductivity
Heat Transfer
Radial Temperature Profile
Thermal Parameters
Trickle-Bed Reactors
Wall Heat Transfer Coefficient
title_short Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas
title_full Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas
title_fullStr Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas
title_full_unstemmed Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas
title_sort Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas
dc.creator.none.fl_str_mv Mariani, Nestor Javier
Martinez, Osvaldo Miguel
Barreto, Guillermo Fernando
author Mariani, Nestor Javier
author_facet Mariani, Nestor Javier
Martinez, Osvaldo Miguel
Barreto, Guillermo Fernando
author_role author
author2 Martinez, Osvaldo Miguel
Barreto, Guillermo Fernando
author2_role author
author
dc.subject.none.fl_str_mv Effective Thermal Conductivity
Heat Transfer
Radial Temperature Profile
Thermal Parameters
Trickle-Bed Reactors
Wall Heat Transfer Coefficient
topic Effective Thermal Conductivity
Heat Transfer
Radial Temperature Profile
Thermal Parameters
Trickle-Bed Reactors
Wall Heat Transfer Coefficient
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The results of an experimental investigation on heat transfer from a packed bed with cocurrent gas-liquid downflow to the wall are presented and analyzed in this contribution. The measurements cover the range of operating variables corresponding to the so-called trickle regime in beds presenting aspect ratios (tube to particle diameter ratio) from 4.67 to 34.26. Water and air were employed as model fluids. The heat transfer process was first analyzed by means of a two-dimensional pseudohomogeneous plug-flow model with two parameters, the effective radial thermal conductivity (ker) and the wall heat transfer coefficient (hw). ker is well correlated with liquid and gas Reynolds numbers and particle diameter, except for the lowest experimental aspect ratio (4.67). Instead, a meaningful correlation of hw stands only for aspect ratios larger than 15. These results are analyzed and the evidence points out to sustain the hypothesis that the model fails at low aspect ratios because an apparent contact resistance (1/hw) can no longer accommodate the effects of significant fluid by passing and finite size of the near-wall region. The experimental set of data were also used to develop a correlation for the overall heat transfer coefficient (ht), which can be employed satisfactorily to predict heat transfer rates in the whole range of variables here investigated. © 2001 Elsevier Science Ltd. All rights reserved.
Fil: Mariani, Nestor Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Fil: Martinez, Osvaldo Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina
Fil: Barreto, Guillermo Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina
description The results of an experimental investigation on heat transfer from a packed bed with cocurrent gas-liquid downflow to the wall are presented and analyzed in this contribution. The measurements cover the range of operating variables corresponding to the so-called trickle regime in beds presenting aspect ratios (tube to particle diameter ratio) from 4.67 to 34.26. Water and air were employed as model fluids. The heat transfer process was first analyzed by means of a two-dimensional pseudohomogeneous plug-flow model with two parameters, the effective radial thermal conductivity (ker) and the wall heat transfer coefficient (hw). ker is well correlated with liquid and gas Reynolds numbers and particle diameter, except for the lowest experimental aspect ratio (4.67). Instead, a meaningful correlation of hw stands only for aspect ratios larger than 15. These results are analyzed and the evidence points out to sustain the hypothesis that the model fails at low aspect ratios because an apparent contact resistance (1/hw) can no longer accommodate the effects of significant fluid by passing and finite size of the near-wall region. The experimental set of data were also used to develop a correlation for the overall heat transfer coefficient (ht), which can be employed satisfactorily to predict heat transfer rates in the whole range of variables here investigated. © 2001 Elsevier Science Ltd. All rights reserved.
publishDate 2001
dc.date.none.fl_str_mv 2001-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/61608
Mariani, Nestor Javier; Martinez, Osvaldo Miguel; Barreto, Guillermo Fernando; Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas; Pergamon-Elsevier Science Ltd; Chemical Engineering Science; 56; 21-22; 11-2001; 5995-6001
0009-2509
CONICET Digital
CONICET
url http://hdl.handle.net/11336/61608
identifier_str_mv Mariani, Nestor Javier; Martinez, Osvaldo Miguel; Barreto, Guillermo Fernando; Evaluation of heat transfer parameters in packed beds with cocurrent downflow of liquid and gas; Pergamon-Elsevier Science Ltd; Chemical Engineering Science; 56; 21-22; 11-2001; 5995-6001
0009-2509
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/S0009-2509(01)00225-1
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0009250901002251
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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