Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos

Detalhes bibliográficos
Autor(a) principal: Saldaña Bernuy, Luis Fernando Junior
Data de Publicação: 2023
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: https://hdl.handle.net/11449/253068
https://lattes.cnpq.br/4258064303851496
https://orcid.org/0000-0002-2192-4435
Resumo: Heat exchangers are devices used to transfer thermal energy between fluids. Their application covers various industrial sectors, including heating, cooling and condensation, the latter being especially important in energy systems. This work aims to evaluate heat transfer in a shell-andtube heat exchanger operating with steam as the hot fluid and water as the cold fluid, which was then replaced by Al2O3 nanofluid. The results show that the heat transfer rate did not change significantly with the use of the nanofluid. However, it can be seen that the nanofluid plays a considerable role in increasing the convective coefficient and the overall average heat transfer coefficients. The thermal conductivity and concentration of the nanoparticles prove to be influential in this phenomenon. It is noteworthy that the most significant increases in the convective heat transfer coefficient are recorded when the steam flow rate is 0.01898 kg/s, showing an increase of 35.9%. In addition, there is also a 34.4% increase when the steam flow rate is increased to 0.02142 kg/s, a 33.1% increase at 0.02262 kg/s and a 32.7% increase when the flow rate reaches 0.02416 kg/s. For the same steam flow rates, the overall average heat transfer coefficients experience notable increases of 31.7%, 30.5%, 29.2% and 28.6%, respectively. It should be noted that the ideal concentration of nanoparticles was determined to be 1.25%, since this concentration provides the highest percentage increases in the variables that influence the heat exchanger's operating parameters.
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spelling Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidosExperimental evaluation of heat transfer enhancement and thermal properties in heat exchangers using nanofluidsTrocador de calor do tipo casco e tubosTransferência de calorCondensaçãoNanofluidosNanopartículas de Al2O3Permutadores térmicosCalor - TransmissãoNanofluídosShell and tube heat exchangerHeat transferCondensationNanofluidsAl2O3 nanoparticlesHeat exchangers are devices used to transfer thermal energy between fluids. Their application covers various industrial sectors, including heating, cooling and condensation, the latter being especially important in energy systems. This work aims to evaluate heat transfer in a shell-andtube heat exchanger operating with steam as the hot fluid and water as the cold fluid, which was then replaced by Al2O3 nanofluid. The results show that the heat transfer rate did not change significantly with the use of the nanofluid. However, it can be seen that the nanofluid plays a considerable role in increasing the convective coefficient and the overall average heat transfer coefficients. The thermal conductivity and concentration of the nanoparticles prove to be influential in this phenomenon. It is noteworthy that the most significant increases in the convective heat transfer coefficient are recorded when the steam flow rate is 0.01898 kg/s, showing an increase of 35.9%. In addition, there is also a 34.4% increase when the steam flow rate is increased to 0.02142 kg/s, a 33.1% increase at 0.02262 kg/s and a 32.7% increase when the flow rate reaches 0.02416 kg/s. For the same steam flow rates, the overall average heat transfer coefficients experience notable increases of 31.7%, 30.5%, 29.2% and 28.6%, respectively. It should be noted that the ideal concentration of nanoparticles was determined to be 1.25%, since this concentration provides the highest percentage increases in the variables that influence the heat exchanger's operating parameters.Agência Nacional do Petróleo, Gás Natural e Biocombustíveis (ANP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)ANP: 044419CAPES: 001Universidade Estadual Paulista (Unesp)Bimbato, Alex Mendonça [UNESP]Zevallos, Andrés Armando MendiburuHuallpachoque, Roberto Carlos ChucuyaSaldaña Bernuy, Luis Fernando Junior2024-01-29T18:00:05Z2024-01-29T18:00:05Z2023-11-22info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfSALDAÑA BERNUY, Luis Fernando Junior. Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos. 91f. 2023. Dissertação (Mestrado em Engenharia ) - Faculdade de Engenharia e Ciências, Universidade Estadual Paulista, Guaratinguetá, 2023.https://hdl.handle.net/11449/253068https://lattes.cnpq.br/4258064303851496https://orcid.org/0000-0002-2192-4435porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESP2024-01-30T06:03:40Zoai:repositorio.unesp.br:11449/253068Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:07:38.860730Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos
Experimental evaluation of heat transfer enhancement and thermal properties in heat exchangers using nanofluids
title Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos
spellingShingle Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos
Saldaña Bernuy, Luis Fernando Junior
Trocador de calor do tipo casco e tubos
Transferência de calor
Condensação
Nanofluidos
Nanopartículas de Al2O3
Permutadores térmicos
Calor - Transmissão
Nanofluídos
Shell and tube heat exchanger
Heat transfer
Condensation
Nanofluids
Al2O3 nanoparticles
title_short Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos
title_full Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos
title_fullStr Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos
title_full_unstemmed Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos
title_sort Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos
author Saldaña Bernuy, Luis Fernando Junior
author_facet Saldaña Bernuy, Luis Fernando Junior
author_role author
dc.contributor.none.fl_str_mv Bimbato, Alex Mendonça [UNESP]
Zevallos, Andrés Armando Mendiburu
Huallpachoque, Roberto Carlos Chucuya
dc.contributor.author.fl_str_mv Saldaña Bernuy, Luis Fernando Junior
dc.subject.por.fl_str_mv Trocador de calor do tipo casco e tubos
Transferência de calor
Condensação
Nanofluidos
Nanopartículas de Al2O3
Permutadores térmicos
Calor - Transmissão
Nanofluídos
Shell and tube heat exchanger
Heat transfer
Condensation
Nanofluids
Al2O3 nanoparticles
topic Trocador de calor do tipo casco e tubos
Transferência de calor
Condensação
Nanofluidos
Nanopartículas de Al2O3
Permutadores térmicos
Calor - Transmissão
Nanofluídos
Shell and tube heat exchanger
Heat transfer
Condensation
Nanofluids
Al2O3 nanoparticles
description Heat exchangers are devices used to transfer thermal energy between fluids. Their application covers various industrial sectors, including heating, cooling and condensation, the latter being especially important in energy systems. This work aims to evaluate heat transfer in a shell-andtube heat exchanger operating with steam as the hot fluid and water as the cold fluid, which was then replaced by Al2O3 nanofluid. The results show that the heat transfer rate did not change significantly with the use of the nanofluid. However, it can be seen that the nanofluid plays a considerable role in increasing the convective coefficient and the overall average heat transfer coefficients. The thermal conductivity and concentration of the nanoparticles prove to be influential in this phenomenon. It is noteworthy that the most significant increases in the convective heat transfer coefficient are recorded when the steam flow rate is 0.01898 kg/s, showing an increase of 35.9%. In addition, there is also a 34.4% increase when the steam flow rate is increased to 0.02142 kg/s, a 33.1% increase at 0.02262 kg/s and a 32.7% increase when the flow rate reaches 0.02416 kg/s. For the same steam flow rates, the overall average heat transfer coefficients experience notable increases of 31.7%, 30.5%, 29.2% and 28.6%, respectively. It should be noted that the ideal concentration of nanoparticles was determined to be 1.25%, since this concentration provides the highest percentage increases in the variables that influence the heat exchanger's operating parameters.
publishDate 2023
dc.date.none.fl_str_mv 2023-11-22
2024-01-29T18:00:05Z
2024-01-29T18:00:05Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv SALDAÑA BERNUY, Luis Fernando Junior. Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos. 91f. 2023. Dissertação (Mestrado em Engenharia ) - Faculdade de Engenharia e Ciências, Universidade Estadual Paulista, Guaratinguetá, 2023.
https://hdl.handle.net/11449/253068
https://lattes.cnpq.br/4258064303851496
https://orcid.org/0000-0002-2192-4435
identifier_str_mv SALDAÑA BERNUY, Luis Fernando Junior. Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos. 91f. 2023. Dissertação (Mestrado em Engenharia ) - Faculdade de Engenharia e Ciências, Universidade Estadual Paulista, Guaratinguetá, 2023.
url https://hdl.handle.net/11449/253068
https://lattes.cnpq.br/4258064303851496
https://orcid.org/0000-0002-2192-4435
dc.language.iso.fl_str_mv por
language por
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 Paulista (Unesp)
publisher.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.source.none.fl_str_mv reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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