How to achieve full liquid conditions at the capillary tube inlet of a household refrigerator

[EN] The capillary tube with a liquid-to-suction heat exchanger (CT-LSHX) is a component that is widely used in household refrigerators. Recent works have indicated that even when measuring subcooled conditions at the condenser outlet, the condition at the capillary tube inlet is a two-phase flow. T...

Descripción completa

Detalles Bibliográficos
Autores: Bardoulet, Laetitia, Corberán, José M., Santiago Martínez-Ballester
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/140938
Acceso en línea:https://riunet.upv.es/handle/10251/140938
Access Level:acceso abierto
Palabra clave:Household refrigerator
Capillary tube inlet
Refrigerant visualization
Non-equilibrium
Subcooled vapor
COP
MAQUINAS Y MOTORES TERMICOS
id ES_5f75ea417caf2c5237bceefcf916647b
oai_identifier_str oai:riunet.upv.es:10251/140938
network_acronym_str ES
network_name_str España
repository_id_str
spelling How to achieve full liquid conditions at the capillary tube inlet of a household refrigeratorBardoulet, LaetitiaCorberán, José M.Santiago Martínez-BallesterHousehold refrigeratorCapillary tube inletRefrigerant visualizationNon-equilibriumSubcooled vaporCOPMAQUINAS Y MOTORES TERMICOS[EN] The capillary tube with a liquid-to-suction heat exchanger (CT-LSHX) is a component that is widely used in household refrigerators. Recent works have indicated that even when measuring subcooled conditions at the condenser outlet, the condition at the capillary tube inlet is a two-phase flow. The present work was dedicated to analyzing the actual refrigerant conditions at the capillary tube inlet and to investigating how full liquid conditions could be achieved. The research was performed using a typical household refrigerator with corresponding fresh food and freezer compartments, replacing the original refrigerant-to-air condenser with a refrigerant-to-water condenser. This allowed, first, the condensation conditions to be controlled and, second, the estimation of the refrigerant conditions at the condenser outlet from the heat exchanger balance. The obtained results indicated the presence of a non-equilibrium two-phase flow, composed of subcooled vapor and subcooled liquid, at the capillary tube inlet, with both liquid and vapor entering the capillary tube as a vortex with small, fast fluctuations of the liquid level. This non-equilibrium indicated that the subcooling, evaluated from the pressure and temperature of the refrigerant at the condenser outlet, was only apparent and did not allow the evaluation of the actual enthalpy. Finally, by using a smaller capillary tube diameter and increasing the compressor speed, full liquid conditions at the capillary tube inlet were achieved. Furthermore, a performance comparison between the original and the new design revealed that the COP was higher with full liquid conditions.In this project, the work of Laetitia Bardoulet was partially supported by the Santiago Grisolia 2015 program, which is funded by the Generalitat Valenciana, with the reference number GRISOLIA/2015/021.ElsevierGeneralitat ValencianaRepositorio Institucional de la Universitat Politècnica de València Riunet20192019-04-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://riunet.upv.es/handle/10251/140938reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengGeneralitat Valenciana https://doi.org/10.13039/501100003359 GRISOLIA%2F2015%2F021open accesshttp://purl.org/coar/access_right/c_abf2Reserva de todos los derechoshttp://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/1409382026-06-13T07:49:27Z
dc.title.none.fl_str_mv How to achieve full liquid conditions at the capillary tube inlet of a household refrigerator
title How to achieve full liquid conditions at the capillary tube inlet of a household refrigerator
spellingShingle How to achieve full liquid conditions at the capillary tube inlet of a household refrigerator
Bardoulet, Laetitia
Household refrigerator
Capillary tube inlet
Refrigerant visualization
Non-equilibrium
Subcooled vapor
COP
MAQUINAS Y MOTORES TERMICOS
title_short How to achieve full liquid conditions at the capillary tube inlet of a household refrigerator
title_full How to achieve full liquid conditions at the capillary tube inlet of a household refrigerator
title_fullStr How to achieve full liquid conditions at the capillary tube inlet of a household refrigerator
title_full_unstemmed How to achieve full liquid conditions at the capillary tube inlet of a household refrigerator
title_sort How to achieve full liquid conditions at the capillary tube inlet of a household refrigerator
dc.creator.none.fl_str_mv Bardoulet, Laetitia
Corberán, José M.
Santiago Martínez-Ballester
author Bardoulet, Laetitia
author_facet Bardoulet, Laetitia
Corberán, José M.
Santiago Martínez-Ballester
author_role author
author2 Corberán, José M.
Santiago Martínez-Ballester
author2_role author
author
dc.contributor.none.fl_str_mv Generalitat Valenciana
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Household refrigerator
Capillary tube inlet
Refrigerant visualization
Non-equilibrium
Subcooled vapor
COP
MAQUINAS Y MOTORES TERMICOS
topic Household refrigerator
Capillary tube inlet
Refrigerant visualization
Non-equilibrium
Subcooled vapor
COP
MAQUINAS Y MOTORES TERMICOS
description [EN] The capillary tube with a liquid-to-suction heat exchanger (CT-LSHX) is a component that is widely used in household refrigerators. Recent works have indicated that even when measuring subcooled conditions at the condenser outlet, the condition at the capillary tube inlet is a two-phase flow. The present work was dedicated to analyzing the actual refrigerant conditions at the capillary tube inlet and to investigating how full liquid conditions could be achieved. The research was performed using a typical household refrigerator with corresponding fresh food and freezer compartments, replacing the original refrigerant-to-air condenser with a refrigerant-to-water condenser. This allowed, first, the condensation conditions to be controlled and, second, the estimation of the refrigerant conditions at the condenser outlet from the heat exchanger balance. The obtained results indicated the presence of a non-equilibrium two-phase flow, composed of subcooled vapor and subcooled liquid, at the capillary tube inlet, with both liquid and vapor entering the capillary tube as a vortex with small, fast fluctuations of the liquid level. This non-equilibrium indicated that the subcooling, evaluated from the pressure and temperature of the refrigerant at the condenser outlet, was only apparent and did not allow the evaluation of the actual enthalpy. Finally, by using a smaller capillary tube diameter and increasing the compressor speed, full liquid conditions at the capillary tube inlet were achieved. Furthermore, a performance comparison between the original and the new design revealed that the COP was higher with full liquid conditions.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-04-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/140938
url https://riunet.upv.es/handle/10251/140938
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Generalitat Valenciana https://doi.org/10.13039/501100003359 GRISOLIA%2F2015%2F021
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reserva de todos los derechos
http://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reserva de todos los derechos
http://rightsstatements.org/vocab/InC/1.0/
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:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869409208138465280
score 15.301603

Similares en LA Referencia