Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.solener.2020.06.112 http://hdl.handle.net/11449/200795 |
Resumo: | Surrogate-based optimization is employed to maximize the thermo-hydraulic performance of a solar air heater duct with non-periodic rows of rectangular winglet pairs mounted in the absorber plate. The present optimization study encompasses the variation of Reynolds number (5000 and 10,000) and of three geometric parameters for each row of rectangular winglets such as chord of the winglets ranging from 8 mm to 40 mm; height of winglets from 8 mm to 21 mm; and angles of attack from 15° to 45° (Flow-Up) and from −45° to −15° (Flow-Down). The Pareto frontiers show that periodic configurations are suboptimal solutions, i.e., the thermo-hydraulic performance of a solar air heater with rectangular winglet pairs not periodically arranged along the channel outperform the periodic arrangements. The aspect ratios and angles of attack for non-periodic and periodic optimized designs are completely different from each other. Moreover, the optimized solutions for Flow-Down arrangement present higher performance than Flow-Up, and this behavior is independent of the Reynolds number. Complex flow patterns and heat transfer mechanisms of the non-periodic optimized solutions are observed, especially the interactions of corner and main vortices along the duct. The first row of winglet pair play the most important role on pressure penalty and heat transfer enhancement when compared to the other rows of rectangular winglet pairs, mainly on Flow-Up arrangement at Re = 10,000. In general, Flow-Up arrangements create a vortex structure more intense than Flow-Down arrangement. |
id |
UNSP_ee243a0765202388c15f46027d157673 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/200795 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairsFlow-downFlow-upMulti-objective optimizationRectangular winglet vortex generatorsSolar air heaterSurrogate-based optimizationSurrogate-based optimization is employed to maximize the thermo-hydraulic performance of a solar air heater duct with non-periodic rows of rectangular winglet pairs mounted in the absorber plate. The present optimization study encompasses the variation of Reynolds number (5000 and 10,000) and of three geometric parameters for each row of rectangular winglets such as chord of the winglets ranging from 8 mm to 40 mm; height of winglets from 8 mm to 21 mm; and angles of attack from 15° to 45° (Flow-Up) and from −45° to −15° (Flow-Down). The Pareto frontiers show that periodic configurations are suboptimal solutions, i.e., the thermo-hydraulic performance of a solar air heater with rectangular winglet pairs not periodically arranged along the channel outperform the periodic arrangements. The aspect ratios and angles of attack for non-periodic and periodic optimized designs are completely different from each other. Moreover, the optimized solutions for Flow-Down arrangement present higher performance than Flow-Up, and this behavior is independent of the Reynolds number. Complex flow patterns and heat transfer mechanisms of the non-periodic optimized solutions are observed, especially the interactions of corner and main vortices along the duct. The first row of winglet pair play the most important role on pressure penalty and heat transfer enhancement when compared to the other rows of rectangular winglet pairs, mainly on Flow-Up arrangement at Re = 10,000. In general, Flow-Up arrangements create a vortex structure more intense than Flow-Down arrangement.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Federal University of ABC (UFABC) – The Engineering Modeling and Applied Social Sciences Center (CECS), Santo AndréDepartment of Mechanical Engineering São Paulo State University (UNESP), Ilha SolteiraDepartment of Mechanical Engineering São Paulo State University (UNESP), Ilha SolteiraFAPESP: 2017/06978-3Universidade Federal do ABC (UFABC)Universidade Estadual Paulista (Unesp)Dezan, Daniel J.Rocha, André D.Salviano, Leandro O. [UNESP]Ferreira, Wallace G.2020-12-12T02:16:17Z2020-12-12T02:16:17Z2020-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1172-1190http://dx.doi.org/10.1016/j.solener.2020.06.112Solar Energy, v. 207, p. 1172-1190.0038-092Xhttp://hdl.handle.net/11449/20079510.1016/j.solener.2020.06.1122-s2.0-85088382983Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSolar Energyinfo:eu-repo/semantics/openAccess2024-07-04T20:06:01Zoai:repositorio.unesp.br:11449/200795Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:09:19.393637Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs |
title |
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs |
spellingShingle |
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs Dezan, Daniel J. Flow-down Flow-up Multi-objective optimization Rectangular winglet vortex generators Solar air heater Surrogate-based optimization |
title_short |
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs |
title_full |
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs |
title_fullStr |
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs |
title_full_unstemmed |
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs |
title_sort |
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs |
author |
Dezan, Daniel J. |
author_facet |
Dezan, Daniel J. Rocha, André D. Salviano, Leandro O. [UNESP] Ferreira, Wallace G. |
author_role |
author |
author2 |
Rocha, André D. Salviano, Leandro O. [UNESP] Ferreira, Wallace G. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal do ABC (UFABC) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Dezan, Daniel J. Rocha, André D. Salviano, Leandro O. [UNESP] Ferreira, Wallace G. |
dc.subject.por.fl_str_mv |
Flow-down Flow-up Multi-objective optimization Rectangular winglet vortex generators Solar air heater Surrogate-based optimization |
topic |
Flow-down Flow-up Multi-objective optimization Rectangular winglet vortex generators Solar air heater Surrogate-based optimization |
description |
Surrogate-based optimization is employed to maximize the thermo-hydraulic performance of a solar air heater duct with non-periodic rows of rectangular winglet pairs mounted in the absorber plate. The present optimization study encompasses the variation of Reynolds number (5000 and 10,000) and of three geometric parameters for each row of rectangular winglets such as chord of the winglets ranging from 8 mm to 40 mm; height of winglets from 8 mm to 21 mm; and angles of attack from 15° to 45° (Flow-Up) and from −45° to −15° (Flow-Down). The Pareto frontiers show that periodic configurations are suboptimal solutions, i.e., the thermo-hydraulic performance of a solar air heater with rectangular winglet pairs not periodically arranged along the channel outperform the periodic arrangements. The aspect ratios and angles of attack for non-periodic and periodic optimized designs are completely different from each other. Moreover, the optimized solutions for Flow-Down arrangement present higher performance than Flow-Up, and this behavior is independent of the Reynolds number. Complex flow patterns and heat transfer mechanisms of the non-periodic optimized solutions are observed, especially the interactions of corner and main vortices along the duct. The first row of winglet pair play the most important role on pressure penalty and heat transfer enhancement when compared to the other rows of rectangular winglet pairs, mainly on Flow-Up arrangement at Re = 10,000. In general, Flow-Up arrangements create a vortex structure more intense than Flow-Down arrangement. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T02:16:17Z 2020-12-12T02:16:17Z 2020-09-01 |
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 |
http://dx.doi.org/10.1016/j.solener.2020.06.112 Solar Energy, v. 207, p. 1172-1190. 0038-092X http://hdl.handle.net/11449/200795 10.1016/j.solener.2020.06.112 2-s2.0-85088382983 |
url |
http://dx.doi.org/10.1016/j.solener.2020.06.112 http://hdl.handle.net/11449/200795 |
identifier_str_mv |
Solar Energy, v. 207, p. 1172-1190. 0038-092X 10.1016/j.solener.2020.06.112 2-s2.0-85088382983 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Solar Energy |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1172-1190 |
dc.source.none.fl_str_mv |
Scopus 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 |
|
_version_ |
1808128469431746560 |