Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada
Autor(a) principal: | |
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Data de Publicação: | 1989 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFU |
Texto Completo: | https://repositorio.ufu.br/handle/123456789/27213 http://dx.doi.org/10.14393/ufu.di.1989.1 |
Resumo: | The heat transfer coefficients and friction factors we re determined experimentally in smooth and finned double-pipe heat exchangers. Experiments were performed in three heat exchan gers with fins of holled plates. At all cases the free area of holes was the same and the diameters of the holes changing. The used heat exchangers were: holes with diameters of 3mm, 5mm and 8mm. The fluids were air in enviromental conditions like cold fluid and hot water like hot fluid. The air-flow was through the annular region while the water-flow was through the inner pipe, in counter flow. Both flows were turbulents. The thermal boun-dary conditions consisted of uniform temperature on the inner surface and the outer surface being insulated. Was performed a heat transfer analisys in order to obtain the fin efficiency and annular region officiency. The heat transfer coefficients and friction factors are presented in dimensioless forms, as func-tions of the Reynolds number of the flow for the relations attain ned by the least squares fitting. Finally, it's realized a compa rison among the results of the finned heat exchangers and of the finned heat exchangers with the smouth tube. |
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Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfuradaTransport coefficients on plain and perforated plate-type bi-tubular heat exchangersCoeficientes de transporteTrocadores de calorAtleta placa perfuradaTransport coeficientsHeat ExchangersFins holled platesCNPQ::ENGENHARIASThe heat transfer coefficients and friction factors we re determined experimentally in smooth and finned double-pipe heat exchangers. Experiments were performed in three heat exchan gers with fins of holled plates. At all cases the free area of holes was the same and the diameters of the holes changing. The used heat exchangers were: holes with diameters of 3mm, 5mm and 8mm. The fluids were air in enviromental conditions like cold fluid and hot water like hot fluid. The air-flow was through the annular region while the water-flow was through the inner pipe, in counter flow. Both flows were turbulents. The thermal boun-dary conditions consisted of uniform temperature on the inner surface and the outer surface being insulated. Was performed a heat transfer analisys in order to obtain the fin efficiency and annular region officiency. The heat transfer coefficients and friction factors are presented in dimensioless forms, as func-tions of the Reynolds number of the flow for the relations attain ned by the least squares fitting. Finally, it's realized a compa rison among the results of the finned heat exchangers and of the finned heat exchangers with the smouth tube.Dissertação (Mestrado)Os coeficientes de transporte, tanto de transferência de calor como de perda de carga foram determinados experimentalmente em trocadores de calor bi-tubulares liso e aletados. Três diferentes trocadores de calor com aletas tipo placa perfurada foram testados, sendo que para todos os casos a area livre de fu ros nas aletas era a mesma, variando-se apenas o diâmetro dos mes mos. Testou-se um trocador de calor com aletas de furos de diâmetro igual a 5mm, outro com furos de diâmetro igual a 3mm e o terceiro com furos de diâmetro igual a 8mm. Os fluidos de trabalho foram o ar em condições ambientais como fluido frio e agua previamente aquecida como fluido quente, onde a agua escoa pelo tubo interno e o ar pela região anular em contra-corrente. Ambos os escoamentos eram turbulentos. As condiçoes de contorno empregadas foram: de temperatura uniforme ao longo da superficie externa do tubo interno e parede adiabatica na superficie interna do tubo externo. Foi também realizada uma analise de transferên cia de calor nas aletas para se obter o rendimento destas e da região anular. Os coeficientes de transporte são apresentadossob forma adimensional como função do numero de Reynolds através de relações que foram obtidas pelo método dos mínimos quadrados. Finalmente, é realizada uma comparação entre o desempenho dos tro cadores de calor aletados entre si e destes com o liso.Universidade Federal de UberlândiaBrasilPrograma de Pós-graduação em Engenharia MecânicaLima, Lutero Carmo dehttp://lattes.cnpq.br/9519603363578016Mendoza, Oscar Saul Hernandezhttp://lattes.cnpq.br/0611338906253313Lima, Luiz Correia de2019-10-22T16:40:43Z2019-10-22T16:40:43Z1989info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfLIMA, Luiz Correia de. Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada. 1989. 189 f. Dissertação (Mestrado Engenharia Me¬cânica) - Universidade Federal de Uberlândia, Uberlândia, 2019. DOI http://dx.doi.org/10.14393/ufu.di.1989.1https://repositorio.ufu.br/handle/123456789/27213http://dx.doi.org/10.14393/ufu.di.1989.1porAttribution-NonCommercial-NoDerivs 3.0 United Stateshttp://creativecommons.org/licenses/by-nc-nd/3.0/us/info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFUinstname:Universidade Federal de Uberlândia (UFU)instacron:UFU2019-10-23T06:10:33Zoai:repositorio.ufu.br:123456789/27213Repositório InstitucionalONGhttp://repositorio.ufu.br/oai/requestdiinf@dirbi.ufu.bropendoar:2019-10-23T06:10:33Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)false |
dc.title.none.fl_str_mv |
Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada Transport coefficients on plain and perforated plate-type bi-tubular heat exchangers |
title |
Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada |
spellingShingle |
Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada Lima, Luiz Correia de Coeficientes de transporte Trocadores de calor Atleta placa perfurada Transport coeficients Heat Exchangers Fins holled plates CNPQ::ENGENHARIAS |
title_short |
Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada |
title_full |
Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada |
title_fullStr |
Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada |
title_full_unstemmed |
Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada |
title_sort |
Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada |
author |
Lima, Luiz Correia de |
author_facet |
Lima, Luiz Correia de |
author_role |
author |
dc.contributor.none.fl_str_mv |
Lima, Lutero Carmo de http://lattes.cnpq.br/9519603363578016 Mendoza, Oscar Saul Hernandez http://lattes.cnpq.br/0611338906253313 |
dc.contributor.author.fl_str_mv |
Lima, Luiz Correia de |
dc.subject.por.fl_str_mv |
Coeficientes de transporte Trocadores de calor Atleta placa perfurada Transport coeficients Heat Exchangers Fins holled plates CNPQ::ENGENHARIAS |
topic |
Coeficientes de transporte Trocadores de calor Atleta placa perfurada Transport coeficients Heat Exchangers Fins holled plates CNPQ::ENGENHARIAS |
description |
The heat transfer coefficients and friction factors we re determined experimentally in smooth and finned double-pipe heat exchangers. Experiments were performed in three heat exchan gers with fins of holled plates. At all cases the free area of holes was the same and the diameters of the holes changing. The used heat exchangers were: holes with diameters of 3mm, 5mm and 8mm. The fluids were air in enviromental conditions like cold fluid and hot water like hot fluid. The air-flow was through the annular region while the water-flow was through the inner pipe, in counter flow. Both flows were turbulents. The thermal boun-dary conditions consisted of uniform temperature on the inner surface and the outer surface being insulated. Was performed a heat transfer analisys in order to obtain the fin efficiency and annular region officiency. The heat transfer coefficients and friction factors are presented in dimensioless forms, as func-tions of the Reynolds number of the flow for the relations attain ned by the least squares fitting. Finally, it's realized a compa rison among the results of the finned heat exchangers and of the finned heat exchangers with the smouth tube. |
publishDate |
1989 |
dc.date.none.fl_str_mv |
1989 2019-10-22T16:40:43Z 2019-10-22T16:40:43Z |
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 |
LIMA, Luiz Correia de. Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada. 1989. 189 f. Dissertação (Mestrado Engenharia Me¬cânica) - Universidade Federal de Uberlândia, Uberlândia, 2019. DOI http://dx.doi.org/10.14393/ufu.di.1989.1 https://repositorio.ufu.br/handle/123456789/27213 http://dx.doi.org/10.14393/ufu.di.1989.1 |
identifier_str_mv |
LIMA, Luiz Correia de. Coeficientes de transporte em trocadores de calor bi-tubulares liso e com aletas tipo placa perfurada. 1989. 189 f. Dissertação (Mestrado Engenharia Me¬cânica) - Universidade Federal de Uberlândia, Uberlândia, 2019. DOI http://dx.doi.org/10.14393/ufu.di.1989.1 |
url |
https://repositorio.ufu.br/handle/123456789/27213 http://dx.doi.org/10.14393/ufu.di.1989.1 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 United States http://creativecommons.org/licenses/by-nc-nd/3.0/us/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 United States http://creativecommons.org/licenses/by-nc-nd/3.0/us/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Uberlândia Brasil Programa de Pós-graduação em Engenharia Mecânica |
publisher.none.fl_str_mv |
Universidade Federal de Uberlândia Brasil Programa de Pós-graduação em Engenharia Mecânica |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFU instname:Universidade Federal de Uberlândia (UFU) instacron:UFU |
instname_str |
Universidade Federal de Uberlândia (UFU) |
instacron_str |
UFU |
institution |
UFU |
reponame_str |
Repositório Institucional da UFU |
collection |
Repositório Institucional da UFU |
repository.name.fl_str_mv |
Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU) |
repository.mail.fl_str_mv |
diinf@dirbi.ufu.br |
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1805569631734202368 |