Estimation of heat and mass transfer coefficients in cross-flow sliding bed drying of grains
Autor(a) principal: | |
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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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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 |
_version_ |
1799315332495572992 |