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- Title
Energy, Exergy, Environmental and Economic Analyses of Natural Refrigerants for Cascade Refrigeration.
- Authors
Singh, Kaushalendra Kumar; Kumar, Rajesh
- Abstract
In this paper, parametric investigation of energy, exergy, economic and environmental performances has been presented for natural refrigerants employed in cascade refrigeration systems (CRS). A Mathematical simulation model of CRS has been developed and variations of exergy efficiency, total annual cost, COP, exergy destruction rate, the mass of GHG emission, and environmental cost with operating temperatures have been shown for fifteen natural refrigerant couples. A single objective thermodynamic optimization has also been carried out on the top three couples which include NH3-C3H6, C4H10-C3H6, and C3H8-C3H6. Comparative analyses based on parametric study and optimization reveal that NH3-C3H6 is the most promising refrigerant couple showing the highest COP and exergy efficiency of 1.326 and 33.42%, respectively, and the lowest total annual cost and environmental cost of 1.048 and 23,003 $/yr. C4H10-C3H6 is slightly better than C3H8-C3H6 refrigerant couple showing 0.5% higher COP and exergy efficiency, and 0.5% lower environmental cost but the overall cost corresponding to C4H10-C3H6 is 13.97% higher than that of C3H8-C3H6. It is found that COP and exergy efficiency improve by 5.57 and 5.20%, respectively, whereas annual environmental and total costs decrease by 4.93 and 3.06%, respectively, when the NH3-CO2 refrigerant couple is replaced by NH3-C3H6 couple under similar operating conditions.
- Subjects
EXERGY; REFRIGERANTS; ECONOMIC research; ENVIRONMENTAL economics; GREENHOUSE gases; ECONOMIC indicators
- Publication
Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ), 2022, Vol 47, Issue 12, p15797
- ISSN
2193-567X
- Publication type
Article
- DOI
10.1007/s13369-022-06804-7