Journal Press India^®

Author Details ( * ) denotes Corresponding author

The methods for improving first law and second law efficiency have been considered in this paper. Detailed energy and exergy analysis of multi-evaporators at different temperatures with multiple compressors and multiple expansion valves in parallel and series with intercooler and flash chambers in the six type vapour compression refrigeration systems for finding irreversibilities in the systems have been done in terms of performance parameter for eco-friendly R134a, R290, R600, R600a, R1234yf, R1234ze, R404a and R152a and conventional R12, R502refrigerants. The numerical computations have been carried out for six systems. It was observed that first law and second law efficiency improved by 22%. It was also observed that performance of above six systems using R600 and R152a nearly matching same values under the accuracy of 5% can be used in the above system .But difficulties using R600, R290 and R600a have flammable problems therefore safety measures are required using these refrigerants, therefore R134a refrigerant is recommended for practical and commercial applications although it has slightly less thermal performance than R152a which is not widely used refrigerant for domestic and industrial applications.

Keywords

Vapour Compression Refrigeration Systems First and second Law Analysis, Irreversibility Analysis in VCR

1. M. Padilla, R. Revellin, J. Bonjour, “Exergy analysis of R413A as replacement of R12 in a domestic refrigeration system”, Energy Conversion and Management 51, 2195–2201, 2010
2. H. O. Spauschus, “HFC 134a as a substitute refrigerant for CFC 12”, Int J Refrig 11: 389–92, 1988
3. J. U. Ahamed, R. Saidur, H. H. Masjuki, “A review on exergy analysis of vapor compression refrigeration system”, Renewable and Sustainable Energy Reviews 15, 1593–1600, 2011
4. R. Llopis, E. Torrella, R. Cabello, D. Sánchez, “Performance evaluation of R404A and R507A refrigerant mixtures in an experimental double-stage vapour compression plant”, Applied Energy 87, 1546–1553, 2010
5. A. Arora, S. C. Kaushik, “Theoretical analysis of a vapour compression refrigeration system with R502, R404A and R507A”, International Journal of Refrigeration 31, 998 – 1005, 2008
6. V. Havelsky, “Investigation of refrigerating system with R12 refrigerant replacements”, Appl Therm Eng; 20: 133–40 2000
7. I. Dincer, “Refrigeration Systems and Applications”, Wiley, UK, p. 26. 2003
8. S. F. Lee, S. A. Sherif, “Second law analysis of various double effect lithium bromide/water absorption chillers”, ASHRAE Transactions AT-01-9-5, 664–673, 2001
9. S. A. Said, B. Ismail, “Exergetic assessment of the coolants HCFC123, HFC134a, CFC11 and CFC12”, Energy 19 (11), 1181–1186, 1994
10. T. J. Kotas, “The Exergy Method of Thermal Plant Analysis.Butterworths”, London, pp. 73–74, 1985
11. S. A. Klein, F. Alvarado, “Engineering Equation Solver”, Version 7.441. F Chart Software, Middleton, WI, 2005