Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle
Absorption refrigeration cycles are alternatives to conventional vapor-compression cycles in which the energy required for refrigeration is provided by heat instead of mechanical work. In this paper, a novel refrigeration cycle utilizing the immiscible liquid-phase separation behavior is simulated a...
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| مؤلفون آخرون: | |
| التنسيق: | article |
| منشور في: |
2012
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| الموضوعات: | |
| الوصول للمادة أونلاين: | http://hdl.handle.net/11073/8596 |
| الوسوم: |
إضافة وسم
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| _version_ | 1864513443241918464 |
|---|---|
| author | Darwish, Naif A. |
| author2 | Gadalla, Mohamed |
| author2_role | author |
| author_facet | Darwish, Naif A. Gadalla, Mohamed |
| author_role | author |
| dc.creator.none.fl_str_mv | Darwish, Naif A. Gadalla, Mohamed |
| dc.date.none.fl_str_mv | 2012-10 2016-10-31T07:24:48Z 2016-10-31T07:24:48Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | Darwish, Naif A., and Mohamed Gadalla. "Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle." International Journal of Energy Research 36, no. 12 (2012): 1183-1191 1099-114X http://hdl.handle.net/11073/8596 10.1002/er.1884 |
| dc.language.none.fl_str_mv | en_US |
| dc.publisher.none.fl_str_mv | Wiley |
| dc.relation.none.fl_str_mv | International Journal of Energy Research http://dx.doi.org/10.1002/er.1884 |
| dc.subject.none.fl_str_mv | Refrigeration Liquid-phase absorption Exergy Entropy Cryogenics Simulation Maxwell cycle |
| dc.title.none.fl_str_mv | Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle |
| dc.type.none.fl_str_mv | info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | Absorption refrigeration cycles are alternatives to conventional vapor-compression cycles in which the energy required for refrigeration is provided by heat instead of mechanical work. In this paper, a novel refrigeration cycle utilizing the immiscible liquid-phase separation behavior is simulated and analyzed using Aspen simulator. The two conjugate liquids adopted in this work are triethylamine (solute) and water (solvent). This binary system has a low critical solution temperature of 18 °C. The thermophysical properties of the binary mixture are generated using the universal functional activity coefficient (UNIFAC) and the nonrandom two-liquid (NRTL) models. The phase splitting phenomenon at the generator temperature is predicted by both models. However, in comparison with the available experimental data for the same binary mixture, NRTL model gives better predictions for the flow rates and compositions of the material streams. Heat duties of the evaporator, absorber, and generator and the power consumption of the solution pump have been calculated using UNIFAC and NRTL models. The cycle COP that plays a major role in determining the cycle economical viability has been predicted for different operating conditions using the two models. Simulation results show that, for a waste heat reservoir at 60 °C and using NRTL model, the COP is about 2.0. Second law analysis conducted for all cycle components of the cycle shows that about 42% of the total exergy destructed occurs in the generator. Finally, the liquid-phase separation refrigeration cycle is predicted to be a promising cycle in the near future because of hardware and energy savings. Copyright © 2011 John Wiley & Sons, Ltd. |
| format | article |
| id | aus_308fb316fc0ae69df3115d0658ee0810 |
| identifier_str_mv | Darwish, Naif A., and Mohamed Gadalla. "Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle." International Journal of Energy Research 36, no. 12 (2012): 1183-1191 1099-114X 10.1002/er.1884 |
| language_invalid_str_mv | en_US |
| network_acronym_str | aus |
| network_name_str | aus |
| oai_identifier_str | oai:repository.aus.edu:11073/8596 |
| publishDate | 2012 |
| publisher.none.fl_str_mv | Wiley |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Performance Assessment of a Liquid-Phase-Separation Refrigeration CycleDarwish, Naif A.Gadalla, MohamedRefrigerationLiquid-phase absorptionExergyEntropyCryogenicsSimulationMaxwell cycleAbsorption refrigeration cycles are alternatives to conventional vapor-compression cycles in which the energy required for refrigeration is provided by heat instead of mechanical work. In this paper, a novel refrigeration cycle utilizing the immiscible liquid-phase separation behavior is simulated and analyzed using Aspen simulator. The two conjugate liquids adopted in this work are triethylamine (solute) and water (solvent). This binary system has a low critical solution temperature of 18 °C. The thermophysical properties of the binary mixture are generated using the universal functional activity coefficient (UNIFAC) and the nonrandom two-liquid (NRTL) models. The phase splitting phenomenon at the generator temperature is predicted by both models. However, in comparison with the available experimental data for the same binary mixture, NRTL model gives better predictions for the flow rates and compositions of the material streams. Heat duties of the evaporator, absorber, and generator and the power consumption of the solution pump have been calculated using UNIFAC and NRTL models. The cycle COP that plays a major role in determining the cycle economical viability has been predicted for different operating conditions using the two models. Simulation results show that, for a waste heat reservoir at 60 °C and using NRTL model, the COP is about 2.0. Second law analysis conducted for all cycle components of the cycle shows that about 42% of the total exergy destructed occurs in the generator. Finally, the liquid-phase separation refrigeration cycle is predicted to be a promising cycle in the near future because of hardware and energy savings. Copyright © 2011 John Wiley & Sons, Ltd.Wiley2016-10-31T07:24:48Z2016-10-31T07:24:48Z2012-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfDarwish, Naif A., and Mohamed Gadalla. "Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle." International Journal of Energy Research 36, no. 12 (2012): 1183-11911099-114Xhttp://hdl.handle.net/11073/859610.1002/er.1884en_USInternational Journal of Energy Researchhttp://dx.doi.org/10.1002/er.1884oai:repository.aus.edu:11073/85962024-08-22T12:17:48Z |
| spellingShingle | Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle Darwish, Naif A. Refrigeration Liquid-phase absorption Exergy Entropy Cryogenics Simulation Maxwell cycle |
| status_str | publishedVersion |
| title | Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle |
| title_full | Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle |
| title_fullStr | Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle |
| title_full_unstemmed | Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle |
| title_short | Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle |
| title_sort | Performance Assessment of a Liquid-Phase-Separation Refrigeration Cycle |
| topic | Refrigeration Liquid-phase absorption Exergy Entropy Cryogenics Simulation Maxwell cycle |
| url | http://hdl.handle.net/11073/8596 |