Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangers

Heating and cooling processes involving viscous fluids, crystallization processes or with fouling tendency require often the employment of scraped surface heat exchangers to enhance the heat transfer. In these cases, obtaining the heat transfer coefficient is complex due to the difficulty of measuri...

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Detalles Bibliográficos
Autores: Martínez Hernández, David Sebastián, Illán Gómez, Fernando, Solano Fernández, Juan Pedro, Viedma Robles, Antonio
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Institución:Universidad Politécnica de Cartagena(UPCT)
Repositorio:Repositorio Digital UPCT
OAI Identifier:oai:repositorio.upct.es:10317/13368
Acceso en línea:http://hdl.handle.net/10317/13368
https://www.sciencedirect.com/science/article/pii/S1359431116339874
Access Level:acceso abierto
Palabra clave:Wall temperature
Thermocouple
Scraped surface heat exchanger
Heat transfer enhancement
Ingeniería Mecánica
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spelling Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangersMartínez Hernández, David SebastiánIllán Gómez, FernandoSolano Fernández, Juan PedroViedma Robles, AntonioWall temperatureThermocoupleScraped surface heat exchangerHeat transfer enhancementIngeniería MecánicaHeating and cooling processes involving viscous fluids, crystallization processes or with fouling tendency require often the employment of scraped surface heat exchangers to enhance the heat transfer. In these cases, obtaining the heat transfer coefficient is complex due to the difficulty of measuring the wall temperature. The present work introduces an innovative measurement technique to retrieve the scraped wall temperature based on embedded thermocouples, welded directly into the wall plate. The thermocouple wires were introduced into a knockout and welded with a filler material. Once welded, the entire set was calibrated in a cold room at controlled temperature. A total of 26 T-type thermocouples were welded to a stainless steel wall substrate, tested later in a rotating scraped surface heat exchanger employed in the ice slurry production. The thermocouples presented a variance of 0.3 °C and an accuracy after calibration of 0.2 °C. The deviation between the scraped wall temperature and the thermocouple measurement was assessed by 2D numerical simulations of the transient heat conduction across the wall substrate. The influence of the wall substrate thickness, thermocouple location and scraping velocity has been considered.Elsevier202420242017info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/10317/13368https://www.sciencedirect.com/science/article/pii/S1359431116339874reponame:Repositorio Digital UPCTinstname:Universidad Politécnica de Cartagena(UPCT)Inglésinfo:eu-repo/semantics/openAccessoai:repositorio.upct.es:10317/133682026-05-15T06:39:02Z
dc.title.none.fl_str_mv Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangers
title Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangers
spellingShingle Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangers
Martínez Hernández, David Sebastián
Wall temperature
Thermocouple
Scraped surface heat exchanger
Heat transfer enhancement
Ingeniería Mecánica
title_short Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangers
title_full Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangers
title_fullStr Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangers
title_full_unstemmed Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangers
title_sort Embedded thermocouple wall temperature measurement technique for scraped surface heat exchangers
dc.creator.none.fl_str_mv Martínez Hernández, David Sebastián
Illán Gómez, Fernando
Solano Fernández, Juan Pedro
Viedma Robles, Antonio
author Martínez Hernández, David Sebastián
author_facet Martínez Hernández, David Sebastián
Illán Gómez, Fernando
Solano Fernández, Juan Pedro
Viedma Robles, Antonio
author_role author
author2 Illán Gómez, Fernando
Solano Fernández, Juan Pedro
Viedma Robles, Antonio
author2_role author
author
author
dc.subject.none.fl_str_mv Wall temperature
Thermocouple
Scraped surface heat exchanger
Heat transfer enhancement
Ingeniería Mecánica
topic Wall temperature
Thermocouple
Scraped surface heat exchanger
Heat transfer enhancement
Ingeniería Mecánica
description Heating and cooling processes involving viscous fluids, crystallization processes or with fouling tendency require often the employment of scraped surface heat exchangers to enhance the heat transfer. In these cases, obtaining the heat transfer coefficient is complex due to the difficulty of measuring the wall temperature. The present work introduces an innovative measurement technique to retrieve the scraped wall temperature based on embedded thermocouples, welded directly into the wall plate. The thermocouple wires were introduced into a knockout and welded with a filler material. Once welded, the entire set was calibrated in a cold room at controlled temperature. A total of 26 T-type thermocouples were welded to a stainless steel wall substrate, tested later in a rotating scraped surface heat exchanger employed in the ice slurry production. The thermocouples presented a variance of 0.3 °C and an accuracy after calibration of 0.2 °C. The deviation between the scraped wall temperature and the thermocouple measurement was assessed by 2D numerical simulations of the transient heat conduction across the wall substrate. The influence of the wall substrate thickness, thermocouple location and scraping velocity has been considered.
publishDate 2017
dc.date.none.fl_str_mv 2017
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10317/13368
https://www.sciencedirect.com/science/article/pii/S1359431116339874
url http://hdl.handle.net/10317/13368
https://www.sciencedirect.com/science/article/pii/S1359431116339874
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositorio Digital UPCT
instname:Universidad Politécnica de Cartagena(UPCT)
instname_str Universidad Politécnica de Cartagena(UPCT)
reponame_str Repositorio Digital UPCT
collection Repositorio Digital UPCT
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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