Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains

Detalhes bibliográficos
Autor(a) principal: Motta Lima, Oswaldo Curty da
Data de Publicação: 2008
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta scientiarum. Technology (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2776
Resumo: The convective two-phase model for grain drying in a cross-flow sliding bed dryer is used for the analysis and estimation of global volumetric mass transfer coefficient and global interphase heat transfer coefficient at different corn drying experimental conditions. Code MAXIMA, based on maximum likelihood estimation techniques, was used for parameter estimation. An equation, analogous to “Newton's law of cooling”, and Nu = * (Re,Pr) correlation were used to describe mass transfer rate and global interphase heat transfer coefficient, respectively. There were two distinct objectives for parameter estimation: minimization of average outlet solid moisture deviations and minimization of outlet gas temperature profile. Results allowed good parameter estimation in both cases. Estimated values were better when average solid moisture was chosen as the single objective variable of the estimation process
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spelling Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grainsEstimação dos coeficientes de transferência de calor e massa na secagem de grãos em leito deslizante e fluxos cruzadosestimação de parâmetrossecagemleito deslizantetransferência de calor e masssamodelagem3.06.00.00-6 Engenharia QuímicaThe convective two-phase model for grain drying in a cross-flow sliding bed dryer is used for the analysis and estimation of global volumetric mass transfer coefficient and global interphase heat transfer coefficient at different corn drying experimental conditions. Code MAXIMA, based on maximum likelihood estimation techniques, was used for parameter estimation. An equation, analogous to “Newton's law of cooling”, and Nu = * (Re,Pr) correlation were used to describe mass transfer rate and global interphase heat transfer coefficient, respectively. There were two distinct objectives for parameter estimation: minimization of average outlet solid moisture deviations and minimization of outlet gas temperature profile. Results allowed good parameter estimation in both cases. Estimated values were better when average solid moisture was chosen as the single objective variable of the estimation processA secagem de milho em um secador do tipo leito deslizante e fluxos cruzados é estudada através da utilização do modelo a duas fases, em conjunto com um pacote computacional de estimação paramétrica (MAXIMA), de modo a permitir a estimação do coeficiente volumétrico global (efetivo) de transferência de massa e do coeficiente global de transferência de calor interfases. Dentro desta abordagem, são adotadas e analisadas uma equação análoga à “lei de resfriamento de Newton”, para a taxa de transferência de massa, e uma correlação do tipo Nu = * (Re,Pr), para o coeficiente global de transferência de calor interfases. São estudadas duas situações distintas para as variáveis objetivo da estimação: a umidade média do sólido e, no segundo caso, também o perfil de temperatura do gás, ambos na saída do secador. Os resultados obtidos mostram uma estimação adequada dos parâmetros avaliados nas duas situações estudadas, observando-se uma melhor qualidade dos valores alcançados com a umidade média do sólido como única variável objetivo da estimaçãoUniversidade Estadual De Maringá2008-05-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/277610.4025/actascitechnol.v23i0.2776Acta Scientiarum. Technology; Vol 23 (2001); 1421-1425Acta Scientiarum. Technology; v. 23 (2001); 1421-14251806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2776/1836Motta Lima, Oswaldo Curty dainfo:eu-repo/semantics/openAccess2024-05-17T13:02:49Zoai:periodicos.uem.br/ojs:article/2776Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:49Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains
Estimação dos coeficientes de transferência de calor e massa na secagem de grãos em leito deslizante e fluxos cruzados
title Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains
spellingShingle Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains
Motta Lima, Oswaldo Curty da
estimação de parâmetros
secagem
leito deslizante
transferência de calor e masssa
modelagem
3.06.00.00-6 Engenharia Química
title_short Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains
title_full Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains
title_fullStr Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains
title_full_unstemmed Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains
title_sort Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains
author Motta Lima, Oswaldo Curty da
author_facet Motta Lima, Oswaldo Curty da
author_role author
dc.contributor.author.fl_str_mv Motta Lima, Oswaldo Curty da
dc.subject.por.fl_str_mv estimação de parâmetros
secagem
leito deslizante
transferência de calor e masssa
modelagem
3.06.00.00-6 Engenharia Química
topic estimação de parâmetros
secagem
leito deslizante
transferência de calor e masssa
modelagem
3.06.00.00-6 Engenharia Química
description The convective two-phase model for grain drying in a cross-flow sliding bed dryer is used for the analysis and estimation of global volumetric mass transfer coefficient and global interphase heat transfer coefficient at different corn drying experimental conditions. Code MAXIMA, based on maximum likelihood estimation techniques, was used for parameter estimation. An equation, analogous to “Newton's law of cooling”, and Nu = * (Re,Pr) correlation were used to describe mass transfer rate and global interphase heat transfer coefficient, respectively. There were two distinct objectives for parameter estimation: minimization of average outlet solid moisture deviations and minimization of outlet gas temperature profile. Results allowed good parameter estimation in both cases. Estimated values were better when average solid moisture was chosen as the single objective variable of the estimation process
publishDate 2008
dc.date.none.fl_str_mv 2008-05-05
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2776
10.4025/actascitechnol.v23i0.2776
url http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2776
identifier_str_mv 10.4025/actascitechnol.v23i0.2776
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2776/1836
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.publisher.none.fl_str_mv Universidade Estadual De Maringá
publisher.none.fl_str_mv Universidade Estadual De Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Technology; Vol 23 (2001); 1421-1425
Acta Scientiarum. Technology; v. 23 (2001); 1421-1425
1806-2563
1807-8664
reponame:Acta scientiarum. Technology (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta scientiarum. Technology (Online)
collection Acta scientiarum. Technology (Online)
repository.name.fl_str_mv Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv ||actatech@uem.br
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