Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)

Detalhes bibliográficos
Autor(a) principal: Paes, J. L.
Data de Publicação: 2020
Outros Autores: Vargas, B. C., Cunha, J. P. B., Silva, D. S. C., Ferraz, G. A. S., Braz, M. R. S., Ferraz, P. F. P., Conti, L.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/46896
Resumo: The study was aimed at design and development of an energy efficient hybrid solar dryer suitable for drying of organic Conilon coffee placed in the town of Seropédica, Rio de Janeiro, Brazil. The energy efficiency and the drying efficiency were the evaluation criteria for thermal performance of the hybrid solar dryer during the coffee drying. Temperature and relative humidity (RH) of the drying and ambient air, solar radiation intensity and coffee weight loss were monitored during the drying process. The process occurred over six consecutive days; the drying time was from 07:00 to 17:00 h, totalling 120 h of operation with an intermittent period (at night) of 14 h. During intermittence, the exhaust system kept off and solar collector and drying chamber sealed. The effective drying period took 60 h, with temperature and RH, respectively, of 38.3 °C and 60.6% outlet of the solar collector, 32.7 °C and 72.2% outlet drying chamber and 27.8 °C and 74.5% ambient air. The maximum temperature in the solar collector and drying chamber reached 54 and 47.7 °C, respectively, with an ambient air temperature of 32 °C at 12:00 h. These values showing temperature increase 22.2 °C in solar collector and 10 ºC drying chamber. The mean variation for the reduction in RH between the drying air inside the solar collector and the ambient air was 28%, while in the chamber obtained in a range of 10.5% at 13:00 h. The solar collector and dryer chamber efficiency were 29.1 and 40.8%, respectively, while the overall dryer efficiency 39.7%.
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spelling Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)Organic conilon coffeeDryingSustainable processingEnergy efficiencyCafé orgânicoSecador solar híbrido - Desempenho térmicoProcessamento sustentávelCafé - SecagemThe study was aimed at design and development of an energy efficient hybrid solar dryer suitable for drying of organic Conilon coffee placed in the town of Seropédica, Rio de Janeiro, Brazil. The energy efficiency and the drying efficiency were the evaluation criteria for thermal performance of the hybrid solar dryer during the coffee drying. Temperature and relative humidity (RH) of the drying and ambient air, solar radiation intensity and coffee weight loss were monitored during the drying process. The process occurred over six consecutive days; the drying time was from 07:00 to 17:00 h, totalling 120 h of operation with an intermittent period (at night) of 14 h. During intermittence, the exhaust system kept off and solar collector and drying chamber sealed. The effective drying period took 60 h, with temperature and RH, respectively, of 38.3 °C and 60.6% outlet of the solar collector, 32.7 °C and 72.2% outlet drying chamber and 27.8 °C and 74.5% ambient air. The maximum temperature in the solar collector and drying chamber reached 54 and 47.7 °C, respectively, with an ambient air temperature of 32 °C at 12:00 h. These values showing temperature increase 22.2 °C in solar collector and 10 ºC drying chamber. The mean variation for the reduction in RH between the drying air inside the solar collector and the ambient air was 28%, while in the chamber obtained in a range of 10.5% at 13:00 h. The solar collector and dryer chamber efficiency were 29.1 and 40.8%, respectively, while the overall dryer efficiency 39.7%.Estonian University of Life Sciences2021-08-19T19:05:19Z2021-08-19T19:05:19Z2020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfPAES, J. L. et al. Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora). Agronomy Research, Tartu, v. 18, n. 3, p. 2166 2184, 2020. DOI: https://doi.org/10.15159/AR.20.164.http://repositorio.ufla.br/jspui/handle/1/46896Agronomy Researchreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessPaes, J. L.Vargas, B. C.Cunha, J. P. B.Silva, D. S. C.Ferraz, G. A. S.Braz, M. R. S.Ferraz, P. F. P.Conti, L.eng2023-05-02T19:06:43Zoai:localhost:1/46896Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2023-05-02T19:06:43Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)
title Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)
spellingShingle Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)
Paes, J. L.
Organic conilon coffee
Drying
Sustainable processing
Energy efficiency
Café orgânico
Secador solar híbrido - Desempenho térmico
Processamento sustentável
Café - Secagem
title_short Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)
title_full Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)
title_fullStr Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)
title_full_unstemmed Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)
title_sort Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)
author Paes, J. L.
author_facet Paes, J. L.
Vargas, B. C.
Cunha, J. P. B.
Silva, D. S. C.
Ferraz, G. A. S.
Braz, M. R. S.
Ferraz, P. F. P.
Conti, L.
author_role author
author2 Vargas, B. C.
Cunha, J. P. B.
Silva, D. S. C.
Ferraz, G. A. S.
Braz, M. R. S.
Ferraz, P. F. P.
Conti, L.
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Paes, J. L.
Vargas, B. C.
Cunha, J. P. B.
Silva, D. S. C.
Ferraz, G. A. S.
Braz, M. R. S.
Ferraz, P. F. P.
Conti, L.
dc.subject.por.fl_str_mv Organic conilon coffee
Drying
Sustainable processing
Energy efficiency
Café orgânico
Secador solar híbrido - Desempenho térmico
Processamento sustentável
Café - Secagem
topic Organic conilon coffee
Drying
Sustainable processing
Energy efficiency
Café orgânico
Secador solar híbrido - Desempenho térmico
Processamento sustentável
Café - Secagem
description The study was aimed at design and development of an energy efficient hybrid solar dryer suitable for drying of organic Conilon coffee placed in the town of Seropédica, Rio de Janeiro, Brazil. The energy efficiency and the drying efficiency were the evaluation criteria for thermal performance of the hybrid solar dryer during the coffee drying. Temperature and relative humidity (RH) of the drying and ambient air, solar radiation intensity and coffee weight loss were monitored during the drying process. The process occurred over six consecutive days; the drying time was from 07:00 to 17:00 h, totalling 120 h of operation with an intermittent period (at night) of 14 h. During intermittence, the exhaust system kept off and solar collector and drying chamber sealed. The effective drying period took 60 h, with temperature and RH, respectively, of 38.3 °C and 60.6% outlet of the solar collector, 32.7 °C and 72.2% outlet drying chamber and 27.8 °C and 74.5% ambient air. The maximum temperature in the solar collector and drying chamber reached 54 and 47.7 °C, respectively, with an ambient air temperature of 32 °C at 12:00 h. These values showing temperature increase 22.2 °C in solar collector and 10 ºC drying chamber. The mean variation for the reduction in RH between the drying air inside the solar collector and the ambient air was 28%, while in the chamber obtained in a range of 10.5% at 13:00 h. The solar collector and dryer chamber efficiency were 29.1 and 40.8%, respectively, while the overall dryer efficiency 39.7%.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021-08-19T19:05:19Z
2021-08-19T19:05:19Z
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 PAES, J. L. et al. Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora). Agronomy Research, Tartu, v. 18, n. 3, p. 2166 2184, 2020. DOI: https://doi.org/10.15159/AR.20.164.
http://repositorio.ufla.br/jspui/handle/1/46896
identifier_str_mv PAES, J. L. et al. Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora). Agronomy Research, Tartu, v. 18, n. 3, p. 2166 2184, 2020. DOI: https://doi.org/10.15159/AR.20.164.
url http://repositorio.ufla.br/jspui/handle/1/46896
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Estonian University of Life Sciences
publisher.none.fl_str_mv Estonian University of Life Sciences
dc.source.none.fl_str_mv Agronomy Research
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
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instname_str Universidade Federal de Lavras (UFLA)
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institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
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