Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysis

First and second law analysis have been conducted for three low temperature driven ammonia-water absorption cooling cycles with increasing internal heat recovery. Based on the results of exergy analysis the structural analysis has been achieved. The obtained Coefficients of Structural Bonds (CSB) co...

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Autores: Boer, Dieter, Gebreslassie, Berhane Hagos, Medrano Martorell, Marc, Nogués Aymamí, Miquel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/47673
Acceso en línea:http://hdl.handle.net/10459.1/47673
Access Level:acceso abierto
Palabra clave:Absorption cycle
Ammonia-water
Exergy analysis
Estructural analysis
Cicles d'absorció
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spelling Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysisBoer, DieterGebreslassie, Berhane HagosMedrano Martorell, MarcNogués Aymamí, MiquelAbsorption cycleAmmonia-waterExergy analysisEstructural analysisCicles d'absorcióFirst and second law analysis have been conducted for three low temperature driven ammonia-water absorption cooling cycles with increasing internal heat recovery. Based on the results of exergy analysis the structural analysis has been achieved. The obtained Coefficients of Structural Bonds (CSB) consider how the irreversibility of the whole cycle is affected by a change in the irreversibility related to an efficiency improvement of a single component. Trends for the different configurations are similar, while quantitative differences among the main heat exchangers are considerable. The highest values of the CSB are found for the refrigerant heat exchanger. Also the evaporator, the condenser, the generator and the absorber show values higher than unity. The lowest CSB’s are obtained in the solution heat exchanger. In general, CSB’s decrease with increasing efficiency. That means that for very efficient heat exchangers, a further improvement looks less attractive. The dephlegmator is an exception as it shows a singularity of the CSB value due to its complex interactions with the other components. Once the CSB’s are obtained for the main components, they can be used in the structural method of the thermoeconomic optimisation. This method enables us to find the optimum design of a component in a straightforward calculation.International Centre for Applied Thermodynamics2009info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10459.1/47673reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésReproducció del document publicat a: http://ijoticat.com/article/view/1034000234International Journal of Thermodynamics, 2009, vol.12, núm.1, p.17-27(c) International Centre for Applied Thermodynamics, 2009info:eu-repo/semantics/openAccessoai:repositori.udl.cat:10459.1/476732026-06-24T12:42:17Z
dc.title.none.fl_str_mv Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysis
title Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysis
spellingShingle Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysis
Boer, Dieter
Absorption cycle
Ammonia-water
Exergy analysis
Estructural analysis
Cicles d'absorció
title_short Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysis
title_full Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysis
title_fullStr Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysis
title_full_unstemmed Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysis
title_sort Effect of internal heat recovery in ammonia-water absorption cooling cycles: exergy and structural analysis
dc.creator.none.fl_str_mv Boer, Dieter
Gebreslassie, Berhane Hagos
Medrano Martorell, Marc
Nogués Aymamí, Miquel
author Boer, Dieter
author_facet Boer, Dieter
Gebreslassie, Berhane Hagos
Medrano Martorell, Marc
Nogués Aymamí, Miquel
author_role author
author2 Gebreslassie, Berhane Hagos
Medrano Martorell, Marc
Nogués Aymamí, Miquel
author2_role author
author
author
dc.subject.none.fl_str_mv Absorption cycle
Ammonia-water
Exergy analysis
Estructural analysis
Cicles d'absorció
topic Absorption cycle
Ammonia-water
Exergy analysis
Estructural analysis
Cicles d'absorció
description First and second law analysis have been conducted for three low temperature driven ammonia-water absorption cooling cycles with increasing internal heat recovery. Based on the results of exergy analysis the structural analysis has been achieved. The obtained Coefficients of Structural Bonds (CSB) consider how the irreversibility of the whole cycle is affected by a change in the irreversibility related to an efficiency improvement of a single component. Trends for the different configurations are similar, while quantitative differences among the main heat exchangers are considerable. The highest values of the CSB are found for the refrigerant heat exchanger. Also the evaporator, the condenser, the generator and the absorber show values higher than unity. The lowest CSB’s are obtained in the solution heat exchanger. In general, CSB’s decrease with increasing efficiency. That means that for very efficient heat exchangers, a further improvement looks less attractive. The dephlegmator is an exception as it shows a singularity of the CSB value due to its complex interactions with the other components. Once the CSB’s are obtained for the main components, they can be used in the structural method of the thermoeconomic optimisation. This method enables us to find the optimum design of a component in a straightforward calculation.
publishDate 2009
dc.date.none.fl_str_mv 2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10459.1/47673
url http://hdl.handle.net/10459.1/47673
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://ijoticat.com/article/view/1034000234
International Journal of Thermodynamics, 2009, vol.12, núm.1, p.17-27
dc.rights.none.fl_str_mv (c) International Centre for Applied Thermodynamics, 2009
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) International Centre for Applied Thermodynamics, 2009
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv International Centre for Applied Thermodynamics
publisher.none.fl_str_mv International Centre for Applied Thermodynamics
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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