Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Holos |
Texto Completo: | http://www2.ifrn.edu.br/ojs/index.php/HOLOS/article/view/250 |
Resumo: | The second law of thermodynamics deals with the quality of energy. More specifically, it is concerned with the degradation of energy during a process, the entropy generation, and the lost opportunities to do work; and it offers plenty of room for improvement. This paper aims to identify key factors that affect refrigeration system performance with CO2. Due to the impact of global warming of CFC´s and HFC's, the use of natural refrigerants has received worldwide attention. The natural refrigerant, carbon dioxide (CO2/R744) is promising for use in cooling systems, especially in the transcritical cycle. An exergetic analysis through the cycle of a bottle cooller (exposer) adapted for commercial use with carbon dioxide was carried out so that the effectiveness of the system components can be estimated and classified, allowing direct efforts to improve performance of components to the transcritical cycle. The analysis revealed that the compressor and expansion valve are the largest sources of losses in the system, and therefore, efforts should focus on improving these components. |
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Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2The second law of thermodynamics deals with the quality of energy. More specifically, it is concerned with the degradation of energy during a process, the entropy generation, and the lost opportunities to do work; and it offers plenty of room for improvement. This paper aims to identify key factors that affect refrigeration system performance with CO2. Due to the impact of global warming of CFC´s and HFC's, the use of natural refrigerants has received worldwide attention. The natural refrigerant, carbon dioxide (CO2/R744) is promising for use in cooling systems, especially in the transcritical cycle. An exergetic analysis through the cycle of a bottle cooller (exposer) adapted for commercial use with carbon dioxide was carried out so that the effectiveness of the system components can be estimated and classified, allowing direct efforts to improve performance of components to the transcritical cycle. The analysis revealed that the compressor and expansion valve are the largest sources of losses in the system, and therefore, efforts should focus on improving these components.Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte2009-10-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www2.ifrn.edu.br/ojs/index.php/HOLOS/article/view/25010.15628/holos.2009.250HOLOS; v. 2 (2009); 52-671807-1600reponame:Holosinstname:Instituto Federal do Rio Grande do Norte (IFRN)instacron:IFRNporhttp://www2.ifrn.edu.br/ojs/index.php/HOLOS/article/view/250/191Copyright (c) 2016 HOLOSinfo:eu-repo/semantics/openAccessAlmeida, Igor Marcel GomesBarbosa, Cleiton Rubens FormigaFontes, Francisco de Assis Oliveira2022-05-01T20:49:25Zoai:holos.ifrn.edu.br:article/250Revistahttp://www2.ifrn.edu.br/ojs/index.php/HOLOSPUBhttp://www2.ifrn.edu.br/ojs/index.php/HOLOS/oaiholos@ifrn.edu.br||jyp.leite@ifrn.edu.br||propi@ifrn.edu.br1807-16001518-1634opendoar:2022-05-01T20:49:25Holos - Instituto Federal do Rio Grande do Norte (IFRN)false |
dc.title.none.fl_str_mv |
Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2 |
title |
Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2 |
spellingShingle |
Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2 Almeida, Igor Marcel Gomes |
title_short |
Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2 |
title_full |
Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2 |
title_fullStr |
Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2 |
title_full_unstemmed |
Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2 |
title_sort |
Exergetic analysis of the transcritical cycle of an bottle cooler operating with CO2 |
author |
Almeida, Igor Marcel Gomes |
author_facet |
Almeida, Igor Marcel Gomes Barbosa, Cleiton Rubens Formiga Fontes, Francisco de Assis Oliveira |
author_role |
author |
author2 |
Barbosa, Cleiton Rubens Formiga Fontes, Francisco de Assis Oliveira |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Almeida, Igor Marcel Gomes Barbosa, Cleiton Rubens Formiga Fontes, Francisco de Assis Oliveira |
description |
The second law of thermodynamics deals with the quality of energy. More specifically, it is concerned with the degradation of energy during a process, the entropy generation, and the lost opportunities to do work; and it offers plenty of room for improvement. This paper aims to identify key factors that affect refrigeration system performance with CO2. Due to the impact of global warming of CFC´s and HFC's, the use of natural refrigerants has received worldwide attention. The natural refrigerant, carbon dioxide (CO2/R744) is promising for use in cooling systems, especially in the transcritical cycle. An exergetic analysis through the cycle of a bottle cooller (exposer) adapted for commercial use with carbon dioxide was carried out so that the effectiveness of the system components can be estimated and classified, allowing direct efforts to improve performance of components to the transcritical cycle. The analysis revealed that the compressor and expansion valve are the largest sources of losses in the system, and therefore, efforts should focus on improving these components. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-10-14 |
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 |
http://www2.ifrn.edu.br/ojs/index.php/HOLOS/article/view/250 10.15628/holos.2009.250 |
url |
http://www2.ifrn.edu.br/ojs/index.php/HOLOS/article/view/250 |
identifier_str_mv |
10.15628/holos.2009.250 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
http://www2.ifrn.edu.br/ojs/index.php/HOLOS/article/view/250/191 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2016 HOLOS info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2016 HOLOS |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte |
publisher.none.fl_str_mv |
Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte |
dc.source.none.fl_str_mv |
HOLOS; v. 2 (2009); 52-67 1807-1600 reponame:Holos instname:Instituto Federal do Rio Grande do Norte (IFRN) instacron:IFRN |
instname_str |
Instituto Federal do Rio Grande do Norte (IFRN) |
instacron_str |
IFRN |
institution |
IFRN |
reponame_str |
Holos |
collection |
Holos |
repository.name.fl_str_mv |
Holos - Instituto Federal do Rio Grande do Norte (IFRN) |
repository.mail.fl_str_mv |
holos@ifrn.edu.br||jyp.leite@ifrn.edu.br||propi@ifrn.edu.br |
_version_ |
1798951617632927744 |