Development of a fixed bed solar dryer: experimental study and CFD simulation
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Research, Society and Development |
Texto Completo: | https://rsdjournal.org/index.php/rsd/article/view/2667 |
Resumo: | Facing the challenges to develop more efficient solar dryers, this work used the Computational fluid dynamics (CFD) to test different configurations of lateral air feeding in a fixed bed solar dryer. Through the simulations, it was found the best configuration of air inlet that provided a better fluid-particle contact. It was made a fixed bed solar dryer, which was tested using soybeans seeds and Moringa oleifera LAM leaves to evaluate the drying rate using two bed configurations: fully opened and partially opened inlets. The CFD results indicated that the air flow rate was more pronounced at the bed top, near the exhaust fan. This can explain the poor drying near the bottom for the experiments performed with all lateral inlets opened. According to the simulation results, the air velocity profile was more homogeneous when the air was fed only near the bottom. So, the use of a partially opened configuration led to a more homogenous solar drying, with a drying rate about 300% higher than the one using the fully opened inlets. |
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Development of a fixed bed solar dryer: experimental study and CFD simulationDesarrollo de un secador solar de lecho fijo: estudio experimental y simulación CFDDesenvolvimento de um secador solar de leito fixo: estudo experimental e simulação CFDSecado solarSostenibilidadMoringa oleíferaHojasSoja.Secagem solarSustentabilidadeMoringa oleíferaFolhasSoja.Solar dryingSustainabilityMoringa oleiferaLeavesSoybeans.Facing the challenges to develop more efficient solar dryers, this work used the Computational fluid dynamics (CFD) to test different configurations of lateral air feeding in a fixed bed solar dryer. Through the simulations, it was found the best configuration of air inlet that provided a better fluid-particle contact. It was made a fixed bed solar dryer, which was tested using soybeans seeds and Moringa oleifera LAM leaves to evaluate the drying rate using two bed configurations: fully opened and partially opened inlets. The CFD results indicated that the air flow rate was more pronounced at the bed top, near the exhaust fan. This can explain the poor drying near the bottom for the experiments performed with all lateral inlets opened. According to the simulation results, the air velocity profile was more homogeneous when the air was fed only near the bottom. So, the use of a partially opened configuration led to a more homogenous solar drying, with a drying rate about 300% higher than the one using the fully opened inlets.Ante el desafío de desarrollar secadores solares más eficientes, la técnica de dinámica de fluidos computacional (CFD) se aplicó en este trabajo para probar diferentes configuraciones de entrada de aire en un secador solar de lecho fijo con entradas laterales. A través de las simulaciones, se determinó la mejor configuración que favoreció el contacto entre partículas. Se construyó un secador solar de lecho fijo, en el que se realizaron experimentos con semillas de soja y hojas de Moringa oleífera. Se probaron dos configuraciones en la secadora: entradas de aire completamente abiertas y parcialmente abiertas. Los resultados de CFD mostraron que para entradas de aire completamente abiertas, el flujo de aire era más pronunciado en la parte superior de lo lecho, cerca del fan. Esto puede explicar los resultados experimentales de secado, en los que los materiales presentaron un secado heterogéneo, más eficiente en la parte superior del lecho. Según las simulaciones, el perfil de velocidad del aire se vuelve más homogéneo cuando el aire se alimenta solo en la base del lecho. Por lo tanto, el secado en la configuración parcialmente abierta fue más homogéneo, y con una tasa de secado alrededor de 300% más alta que la obtenida en la condición con entradas completamente abiertas.Diante do desafio de desenvolver secadores solares mais eficientes, a técnica de Fluidodinâmica Computacional (CFD) foi aplicada neste trabalho para testar diferentes configurações de entrada de ar em um secador solar de leito fixo, com entradas laterais. Por meio das simulações, foi determinada a melhor configuração de alimentação de ar que favoreceu o contato entre partículas. Foi construído um secador solar de leito fixo, no qual se realizou experimentos com sementes de soja e folhas de Moringa oleífera LAM. Duas configurações de alimentação de ar no secador foram testadas: entradas totalmente abertas e parcialmente abertas. Os resultados de CFD mostraram que a vazão de ar foi mais pronunciada no topo do leito, perto do exaustor, quando a alimentação de ar ocorre por entradas laterais totalmente abertas ao longo do leito. Isso pode explicar os resultados experimentais de secagem, em que os materiais apresentaram uma secagem heterogênea, secando de forma mais eficiente no topo do leito. De acordo com as simulações, o perfil de velocidade de ar passa a ser mais homogêneo quando o ar é alimentado apenas na base do leito. Assim, a secagem na configuração parcialmente aberta foi mais homogênea, e com taxa de secagem cerca de 300% superior à obtida na condição com entradas totalmente abertas.Research, Society and Development2020-02-27info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/266710.33448/rsd-v9i3.2667Research, Society and Development; Vol. 9 No. 3; e123932667Research, Society and Development; Vol. 9 Núm. 3; e123932667Research, Society and Development; v. 9 n. 3; e1239326672525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIenghttps://rsdjournal.org/index.php/rsd/article/view/2667/2723Copyright (c) 2019 Ana Carolina Ribeiro Stoppe, José Luiz Vieira Neto, Kassia Graciele Santosinfo:eu-repo/semantics/openAccessStoppe, Ana Carolina RibeiroNeto, José Luiz VieiraSantos, Kassia Graciele dos2020-08-20T18:07:57Zoai:ojs.pkp.sfu.ca:article/2667Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:27:10.239987Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
dc.title.none.fl_str_mv |
Development of a fixed bed solar dryer: experimental study and CFD simulation Desarrollo de un secador solar de lecho fijo: estudio experimental y simulación CFD Desenvolvimento de um secador solar de leito fixo: estudo experimental e simulação CFD |
title |
Development of a fixed bed solar dryer: experimental study and CFD simulation |
spellingShingle |
Development of a fixed bed solar dryer: experimental study and CFD simulation Stoppe, Ana Carolina Ribeiro Secado solar Sostenibilidad Moringa oleífera Hojas Soja. Secagem solar Sustentabilidade Moringa oleífera Folhas Soja. Solar drying Sustainability Moringa oleifera Leaves Soybeans. |
title_short |
Development of a fixed bed solar dryer: experimental study and CFD simulation |
title_full |
Development of a fixed bed solar dryer: experimental study and CFD simulation |
title_fullStr |
Development of a fixed bed solar dryer: experimental study and CFD simulation |
title_full_unstemmed |
Development of a fixed bed solar dryer: experimental study and CFD simulation |
title_sort |
Development of a fixed bed solar dryer: experimental study and CFD simulation |
author |
Stoppe, Ana Carolina Ribeiro |
author_facet |
Stoppe, Ana Carolina Ribeiro Neto, José Luiz Vieira Santos, Kassia Graciele dos |
author_role |
author |
author2 |
Neto, José Luiz Vieira Santos, Kassia Graciele dos |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Stoppe, Ana Carolina Ribeiro Neto, José Luiz Vieira Santos, Kassia Graciele dos |
dc.subject.por.fl_str_mv |
Secado solar Sostenibilidad Moringa oleífera Hojas Soja. Secagem solar Sustentabilidade Moringa oleífera Folhas Soja. Solar drying Sustainability Moringa oleifera Leaves Soybeans. |
topic |
Secado solar Sostenibilidad Moringa oleífera Hojas Soja. Secagem solar Sustentabilidade Moringa oleífera Folhas Soja. Solar drying Sustainability Moringa oleifera Leaves Soybeans. |
description |
Facing the challenges to develop more efficient solar dryers, this work used the Computational fluid dynamics (CFD) to test different configurations of lateral air feeding in a fixed bed solar dryer. Through the simulations, it was found the best configuration of air inlet that provided a better fluid-particle contact. It was made a fixed bed solar dryer, which was tested using soybeans seeds and Moringa oleifera LAM leaves to evaluate the drying rate using two bed configurations: fully opened and partially opened inlets. The CFD results indicated that the air flow rate was more pronounced at the bed top, near the exhaust fan. This can explain the poor drying near the bottom for the experiments performed with all lateral inlets opened. According to the simulation results, the air velocity profile was more homogeneous when the air was fed only near the bottom. So, the use of a partially opened configuration led to a more homogenous solar drying, with a drying rate about 300% higher than the one using the fully opened inlets. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-02-27 |
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 |
https://rsdjournal.org/index.php/rsd/article/view/2667 10.33448/rsd-v9i3.2667 |
url |
https://rsdjournal.org/index.php/rsd/article/view/2667 |
identifier_str_mv |
10.33448/rsd-v9i3.2667 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/2667/2723 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Ana Carolina Ribeiro Stoppe, José Luiz Vieira Neto, Kassia Graciele Santos info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Ana Carolina Ribeiro Stoppe, José Luiz Vieira Neto, Kassia Graciele Santos |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Research, Society and Development |
publisher.none.fl_str_mv |
Research, Society and Development |
dc.source.none.fl_str_mv |
Research, Society and Development; Vol. 9 No. 3; e123932667 Research, Society and Development; Vol. 9 Núm. 3; e123932667 Research, Society and Development; v. 9 n. 3; e123932667 2525-3409 reponame:Research, Society and Development instname:Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
instname_str |
Universidade Federal de Itajubá (UNIFEI) |
instacron_str |
UNIFEI |
institution |
UNIFEI |
reponame_str |
Research, Society and Development |
collection |
Research, Society and Development |
repository.name.fl_str_mv |
Research, Society and Development - Universidade Federal de Itajubá (UNIFEI) |
repository.mail.fl_str_mv |
rsd.articles@gmail.com |
_version_ |
1797052646263095296 |