Thermal performance of a solar hybrid dryer for Conilon coffee (Coffea canephora)
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , |
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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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) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
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) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1815439245485015040 |