On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems

Detalhes bibliográficos
Autor(a) principal: Ruivo, C. R.
Data de Publicação: 2008
Outros Autores: Costa, J. J., Figueiredo, A. R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/4189
https://doi.org/10.1016/j.ijthermalsci.2007.01.032
Resumo: In the present work, a detailed model of simultaneous heat and mass transfer through a desiccant micro-porous medium of a channel wall of compact heat and mass exchangers, such as desiccant wheels, was developed. The relevant phenomena considered by this model within the porous medium are surface diffusion of the adsorbed water, Knudsen diffusion of water vapour, heat conduction and the sorption process. A one-dimensional formulation of this model is used to investigate the validity of two simplifying approaches based on the lumped-capacitance method. One consists of neglecting the transversal heat and mass transfer resistances within the porous medium, the other of cancelling only the thermal resistance.
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spelling On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systemsAdsorptionDesiccant layerLumped capacitance modelsHeat and mass exchangersIn the present work, a detailed model of simultaneous heat and mass transfer through a desiccant micro-porous medium of a channel wall of compact heat and mass exchangers, such as desiccant wheels, was developed. The relevant phenomena considered by this model within the porous medium are surface diffusion of the adsorbed water, Knudsen diffusion of water vapour, heat conduction and the sorption process. A one-dimensional formulation of this model is used to investigate the validity of two simplifying approaches based on the lumped-capacitance method. One consists of neglecting the transversal heat and mass transfer resistances within the porous medium, the other of cancelling only the thermal resistance.http://www.sciencedirect.com/science/article/B6VT1-4NDDT7N-2/1/03da119a5957dd37fdfb381ac89362082008info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4189http://hdl.handle.net/10316/4189https://doi.org/10.1016/j.ijthermalsci.2007.01.032engInternational Journal of Thermal Sciences. 47:3 (2008) 282-292Ruivo, C. R.Costa, J. J.Figueiredo, A. R.info: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:RCAAP2020-11-06T16:49:07Zoai:estudogeral.uc.pt:10316/4189Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:58:33.199004Repositório 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 On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems
title On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems
spellingShingle On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems
Ruivo, C. R.
Adsorption
Desiccant layer
Lumped capacitance models
Heat and mass exchangers
title_short On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems
title_full On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems
title_fullStr On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems
title_full_unstemmed On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems
title_sort On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems
author Ruivo, C. R.
author_facet Ruivo, C. R.
Costa, J. J.
Figueiredo, A. R.
author_role author
author2 Costa, J. J.
Figueiredo, A. R.
author2_role author
author
dc.contributor.author.fl_str_mv Ruivo, C. R.
Costa, J. J.
Figueiredo, A. R.
dc.subject.por.fl_str_mv Adsorption
Desiccant layer
Lumped capacitance models
Heat and mass exchangers
topic Adsorption
Desiccant layer
Lumped capacitance models
Heat and mass exchangers
description In the present work, a detailed model of simultaneous heat and mass transfer through a desiccant micro-porous medium of a channel wall of compact heat and mass exchangers, such as desiccant wheels, was developed. The relevant phenomena considered by this model within the porous medium are surface diffusion of the adsorbed water, Knudsen diffusion of water vapour, heat conduction and the sorption process. A one-dimensional formulation of this model is used to investigate the validity of two simplifying approaches based on the lumped-capacitance method. One consists of neglecting the transversal heat and mass transfer resistances within the porous medium, the other of cancelling only the thermal resistance.
publishDate 2008
dc.date.none.fl_str_mv 2008
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://hdl.handle.net/10316/4189
http://hdl.handle.net/10316/4189
https://doi.org/10.1016/j.ijthermalsci.2007.01.032
url http://hdl.handle.net/10316/4189
https://doi.org/10.1016/j.ijthermalsci.2007.01.032
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv International Journal of Thermal Sciences. 47:3 (2008) 282-292
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv aplication/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
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