Heat Analysis of a Vacuum Flask

Detalhes bibliográficos
Autor(a) principal: Anyanwu, Chidebe Stanley
Data de Publicação: 2022
Outros Autores: Gad, Abdelrahman, Bilal, Hussein, Ewim, Daniel Raphael Ejike
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista de Engenharia Química e Química
Texto Completo: https://periodicos.ufv.br/jcec/article/view/15174
Resumo: Materials with low thermal conductivity like aerogel, acrylic, aluminum silicate, superfine glass wool, and phenolic foam are often used as insulation materials in engineering and have noticed increasing applications in other spheres of life, like thermal insulation in buildings and vacuum flasks. The objective of this research is to study the temperature variation of the coffee over 10 hours in a selected vacuum flask while varying the geometrical and material properties of the flask. In other words, change the parameters (without changing the fluid capacity) to minimize the heat loss over time. The range of the bottleneck radius used is from 40 mm to 60 mm, with a step size (increment) of 5 mm. The width of the whole flask is proportional to the bottleneck radius, with constant fluid capacity. The initial design used an outer and inner steel layer with plastic foam in between, and the bottleneck is made from nylon with a radius of 50 mm. This design allows the hot fluid to be at 55 oC after 10 hours in atmospheric conditions. The temperature of the coffee in the vacuum flask made of steel layers with aerogel as insulation was 72.3 oC after 10 hours, while the steel layers and CO2 insulation were 67.9 oC and the acrylic layer and aerogel were 77.89 oC after a 10-hour duration in still air. This simulation was carried out using COMSOL, and the result shows that an acrylic layer and aerogel at a bottleneck radius of 60 mm were the best combination. Verification and validation were carried out to test for convergence of the numerical and analytical solutions.
id UFV-4_514023d19fa2122cd4d4a6641bc85ce2
oai_identifier_str oai:ojs.periodicos.ufv.br:article/15174
network_acronym_str UFV-4
network_name_str Revista de Engenharia Química e Química
repository_id_str
spelling Heat Analysis of a Vacuum FlaskVacuum FlaskThermal InsulationSimulationAerogelAcrylicCOMSOLAluminium SilicateVerification and ValidationMaterials with low thermal conductivity like aerogel, acrylic, aluminum silicate, superfine glass wool, and phenolic foam are often used as insulation materials in engineering and have noticed increasing applications in other spheres of life, like thermal insulation in buildings and vacuum flasks. The objective of this research is to study the temperature variation of the coffee over 10 hours in a selected vacuum flask while varying the geometrical and material properties of the flask. In other words, change the parameters (without changing the fluid capacity) to minimize the heat loss over time. The range of the bottleneck radius used is from 40 mm to 60 mm, with a step size (increment) of 5 mm. The width of the whole flask is proportional to the bottleneck radius, with constant fluid capacity. The initial design used an outer and inner steel layer with plastic foam in between, and the bottleneck is made from nylon with a radius of 50 mm. This design allows the hot fluid to be at 55 oC after 10 hours in atmospheric conditions. The temperature of the coffee in the vacuum flask made of steel layers with aerogel as insulation was 72.3 oC after 10 hours, while the steel layers and CO2 insulation were 67.9 oC and the acrylic layer and aerogel were 77.89 oC after a 10-hour duration in still air. This simulation was carried out using COMSOL, and the result shows that an acrylic layer and aerogel at a bottleneck radius of 60 mm were the best combination. Verification and validation were carried out to test for convergence of the numerical and analytical solutions.Universidade Federal de Viçosa - UFV2022-12-27info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufv.br/jcec/article/view/1517410.18540/jcecvl8iss11pp15174-01eThe Journal of Engineering and Exact Sciences; Vol. 8 No. 11 (2022); 15174-01eThe Journal of Engineering and Exact Sciences; Vol. 8 Núm. 11 (2022); 15174-01eThe Journal of Engineering and Exact Sciences; v. 8 n. 11 (2022); 15174-01e2527-1075reponame:Revista de Engenharia Química e Químicainstname:Universidade Federal de Viçosa (UFV)instacron:UFVenghttps://periodicos.ufv.br/jcec/article/view/15174/7732Copyright (c) 2022 The Journal of Engineering and Exact Scienceshttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessAnyanwu, Chidebe StanleyGad, AbdelrahmanBilal, HusseinEwim, Daniel Raphael Ejike2023-02-23T13:29:33Zoai:ojs.periodicos.ufv.br:article/15174Revistahttp://www.seer.ufv.br/seer/rbeq2/index.php/req2/indexONGhttps://periodicos.ufv.br/jcec/oaijcec.journal@ufv.br||req2@ufv.br2446-94162446-9416opendoar:2023-02-23T13:29:33Revista de Engenharia Química e Química - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Heat Analysis of a Vacuum Flask
title Heat Analysis of a Vacuum Flask
spellingShingle Heat Analysis of a Vacuum Flask
Anyanwu, Chidebe Stanley
Vacuum Flask
Thermal Insulation
Simulation
Aerogel
Acrylic
COMSOL
Aluminium Silicate
Verification and Validation
title_short Heat Analysis of a Vacuum Flask
title_full Heat Analysis of a Vacuum Flask
title_fullStr Heat Analysis of a Vacuum Flask
title_full_unstemmed Heat Analysis of a Vacuum Flask
title_sort Heat Analysis of a Vacuum Flask
author Anyanwu, Chidebe Stanley
author_facet Anyanwu, Chidebe Stanley
Gad, Abdelrahman
Bilal, Hussein
Ewim, Daniel Raphael Ejike
author_role author
author2 Gad, Abdelrahman
Bilal, Hussein
Ewim, Daniel Raphael Ejike
author2_role author
author
author
dc.contributor.author.fl_str_mv Anyanwu, Chidebe Stanley
Gad, Abdelrahman
Bilal, Hussein
Ewim, Daniel Raphael Ejike
dc.subject.por.fl_str_mv Vacuum Flask
Thermal Insulation
Simulation
Aerogel
Acrylic
COMSOL
Aluminium Silicate
Verification and Validation
topic Vacuum Flask
Thermal Insulation
Simulation
Aerogel
Acrylic
COMSOL
Aluminium Silicate
Verification and Validation
description Materials with low thermal conductivity like aerogel, acrylic, aluminum silicate, superfine glass wool, and phenolic foam are often used as insulation materials in engineering and have noticed increasing applications in other spheres of life, like thermal insulation in buildings and vacuum flasks. The objective of this research is to study the temperature variation of the coffee over 10 hours in a selected vacuum flask while varying the geometrical and material properties of the flask. In other words, change the parameters (without changing the fluid capacity) to minimize the heat loss over time. The range of the bottleneck radius used is from 40 mm to 60 mm, with a step size (increment) of 5 mm. The width of the whole flask is proportional to the bottleneck radius, with constant fluid capacity. The initial design used an outer and inner steel layer with plastic foam in between, and the bottleneck is made from nylon with a radius of 50 mm. This design allows the hot fluid to be at 55 oC after 10 hours in atmospheric conditions. The temperature of the coffee in the vacuum flask made of steel layers with aerogel as insulation was 72.3 oC after 10 hours, while the steel layers and CO2 insulation were 67.9 oC and the acrylic layer and aerogel were 77.89 oC after a 10-hour duration in still air. This simulation was carried out using COMSOL, and the result shows that an acrylic layer and aerogel at a bottleneck radius of 60 mm were the best combination. Verification and validation were carried out to test for convergence of the numerical and analytical solutions.
publishDate 2022
dc.date.none.fl_str_mv 2022-12-27
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.ufv.br/jcec/article/view/15174
10.18540/jcecvl8iss11pp15174-01e
url https://periodicos.ufv.br/jcec/article/view/15174
identifier_str_mv 10.18540/jcecvl8iss11pp15174-01e
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://periodicos.ufv.br/jcec/article/view/15174/7732
dc.rights.driver.fl_str_mv Copyright (c) 2022 The Journal of Engineering and Exact Sciences
https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2022 The Journal of Engineering and Exact Sciences
https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Viçosa - UFV
publisher.none.fl_str_mv Universidade Federal de Viçosa - UFV
dc.source.none.fl_str_mv The Journal of Engineering and Exact Sciences; Vol. 8 No. 11 (2022); 15174-01e
The Journal of Engineering and Exact Sciences; Vol. 8 Núm. 11 (2022); 15174-01e
The Journal of Engineering and Exact Sciences; v. 8 n. 11 (2022); 15174-01e
2527-1075
reponame:Revista de Engenharia Química e Química
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str Revista de Engenharia Química e Química
collection Revista de Engenharia Química e Química
repository.name.fl_str_mv Revista de Engenharia Química e Química - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv jcec.journal@ufv.br||req2@ufv.br
_version_ 1800211186699993088