Avaliação experimental do aumento da transferência de calor e de propriedades térmicas em trocadores de calor utilizando nanofluidos
Autor(a) principal: | |
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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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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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