Proposal of a double ejector-two flash tank absorption refrigeration cycle: Energy, exergy and thermoeconomic evaluation
This research presents the proposal of a double ejector-two flash tank absorption refrigeration cycle, in which vapor and liquid ejectors are implemented simultaneously before the condensers and absorbers components. For the vapor ejector simulation, the shock circle approach is used. The internal e...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-10-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23008043 |
| _version_ | 1797670313900638208 |
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| author | A. Dhahi Gharir L. Garousi Farshi |
| author_facet | A. Dhahi Gharir L. Garousi Farshi |
| author_sort | A. Dhahi Gharir |
| collection | DOAJ |
| description | This research presents the proposal of a double ejector-two flash tank absorption refrigeration cycle, in which vapor and liquid ejectors are implemented simultaneously before the condensers and absorbers components. For the vapor ejector simulation, the shock circle approach is used. The internal environment of the vapor ejector, including the chocking phenomenon and the irreversible shock process, is also thoroughly examined. It is proposed that ejectors and flash tanks can improve the system performance. It is possible to improve the ejector entrainment ratio by incorporating a flash tank between the evaporator and condenser, which would also increase the evaporator cooling effect. Moreover, a second flash tank is installed between the generator and the absorber, which allows the generator to operate at a lower temperature and thus reduces the generator heat load. Consequently, the system's COP (coefficient of performance) increases. Furthermore, the unit cost of the final product in a wide range of operational conditions is calculated. The findings revealed up to 56.8% increase in the COP. The improvement of the maximum exergetic efficiency in the new cycle compared to the basic cycle also reaches 22.5%. Moreover, the thermoeconomic investigation show up to 34.6%. reduction in product cost. |
| first_indexed | 2024-03-11T20:57:52Z |
| format | Article |
| id | doaj.art-99346c7225274dee9cf89bf0775d5252 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-11T20:57:52Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-99346c7225274dee9cf89bf0775d52522023-09-30T04:54:51ZengElsevierCase Studies in Thermal Engineering2214-157X2023-10-0150103498Proposal of a double ejector-two flash tank absorption refrigeration cycle: Energy, exergy and thermoeconomic evaluationA. Dhahi Gharir0L. Garousi Farshi1Faculty of Mechanical Engineering, University of Tabriz, Tabriz, IranCorresponding author.; Faculty of Mechanical Engineering, University of Tabriz, Tabriz, IranThis research presents the proposal of a double ejector-two flash tank absorption refrigeration cycle, in which vapor and liquid ejectors are implemented simultaneously before the condensers and absorbers components. For the vapor ejector simulation, the shock circle approach is used. The internal environment of the vapor ejector, including the chocking phenomenon and the irreversible shock process, is also thoroughly examined. It is proposed that ejectors and flash tanks can improve the system performance. It is possible to improve the ejector entrainment ratio by incorporating a flash tank between the evaporator and condenser, which would also increase the evaporator cooling effect. Moreover, a second flash tank is installed between the generator and the absorber, which allows the generator to operate at a lower temperature and thus reduces the generator heat load. Consequently, the system's COP (coefficient of performance) increases. Furthermore, the unit cost of the final product in a wide range of operational conditions is calculated. The findings revealed up to 56.8% increase in the COP. The improvement of the maximum exergetic efficiency in the new cycle compared to the basic cycle also reaches 22.5%. Moreover, the thermoeconomic investigation show up to 34.6%. reduction in product cost.http://www.sciencedirect.com/science/article/pii/S2214157X23008043Absorption refrigerationFlash tankDouble ejectorThermoeconomic analysisProduct cost |
| spellingShingle | A. Dhahi Gharir L. Garousi Farshi Proposal of a double ejector-two flash tank absorption refrigeration cycle: Energy, exergy and thermoeconomic evaluation Case Studies in Thermal Engineering Absorption refrigeration Flash tank Double ejector Thermoeconomic analysis Product cost |
| title | Proposal of a double ejector-two flash tank absorption refrigeration cycle: Energy, exergy and thermoeconomic evaluation |
| title_full | Proposal of a double ejector-two flash tank absorption refrigeration cycle: Energy, exergy and thermoeconomic evaluation |
| title_fullStr | Proposal of a double ejector-two flash tank absorption refrigeration cycle: Energy, exergy and thermoeconomic evaluation |
| title_full_unstemmed | Proposal of a double ejector-two flash tank absorption refrigeration cycle: Energy, exergy and thermoeconomic evaluation |
| title_short | Proposal of a double ejector-two flash tank absorption refrigeration cycle: Energy, exergy and thermoeconomic evaluation |
| title_sort | proposal of a double ejector two flash tank absorption refrigeration cycle energy exergy and thermoeconomic evaluation |
| topic | Absorption refrigeration Flash tank Double ejector Thermoeconomic analysis Product cost |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23008043 |
| work_keys_str_mv | AT adhahigharir proposalofadoubleejectortwoflashtankabsorptionrefrigerationcycleenergyexergyandthermoeconomicevaluation AT lgarousifarshi proposalofadoubleejectortwoflashtankabsorptionrefrigerationcycleenergyexergyandthermoeconomicevaluation |