Development of statistical models for predicting performance of R12, R134a and R290/R600 mixture refrigerants using design of experiments

. In this paper, the performance of hydrocarbon mixture refrigerant R290/R600 (79/21 by wt %) has been analyzed as an alternative to R12 and R134a. Experiments are conducted with R12, R134a and R290/R600 mixture refrigerant at different condensing and evaporating temperatures and at various compressor speeds. Further, the statistical models are developed using design of experiments technique for the prediction of refrigeration system parameters such as refrigerating capacity, power consumption and coefficient of performance. The models developed are checked for their adequacy using F-test. The performances of vapour compression refrigeration system with various refrigerants R12, R134a and R290/R600 are compared. The R290/R600 mixture shows 19.3-27.9% higher coefficient of performance than that with R12 and R134a and it is found that the hydrocarbon mixture with 79% propane and 21% butane can be used as a substitute for R12 and R134a.

PDF

___

Baskin, E. (1998). TECHNICAL PAPERS-4206-Synopsis of Residential Refrigerator/Freezer Alternative Refrigerants Evaluation. ASHRAE Transactions- American Society of Heating Refrigerating Air Conditioning Engin, 104(2), 266-273.
Bilal A. Akash., & Salem A. Said. (2003). Assessment of LPG as a Possible Alternative to R12 in Domestic Refrigerators. Energy conversion and Management, 44, 381- 388.
Bolaji, B.O. (2010). Experimental Study of R152a and R32 to Replace R134a in a Domestic Refrigerator. Energy, 35, 3793-3798.
Bolaji, B.O. (2010). Experimental Analysis of Reciprocating Compressor Performance with Eco- friendly Refrigerants. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 224, 781-786.
Boumaza, M. (2010). Performance Assessment of Natural Refrigerants as Substitutes to CFC and HCFC in Hot Climate. Int. J. of Thermal & Environmental Engineering, 1, 125-130.
Butler, D. (2001). Life After CFCs and HCFCs, CIBSE National Conference, Regents College, London, 1-3.
Carpenter, N.E. (1992). Retrofitting HFC-134a into Existing CFC12 systems. Int. J. of Refrigeration, 15, 332-339.
Chen, J. (2005). Zeotropic Refrigerants and the Special Characteristics. Proceedings of the IMechE part E, Journal of Process Mechanical Engineering, 219, 183-186.
Cochran, W. G. & Cox, G. M. (1992). Experimental Designs, (2nd ed.). New York, John Wiley and Sons. Devotta, S., & Gopichand, S. (1992). Comparative Assessment of HFC 134a and Some Refrigerants as Alternatives to CFC 12. Int. J. of Refrigeration, 15, 112-18.
Fatouh, M., & Kafafy, M.E. (2006). Experimental Evaluation of a Domestic Refrigerator Working with LPG. Applied Thermal Engineering, 26, 1593-1603.
Granryd, E. (2001). Hydrocarbons as Refrigerants – an Overview. Int. J. of Refrigeration, 24, 15-24.
Kuijpers, L. J. M., De Wit, J. A., & Janssen, M. J. P. (1988). Possibilities for the Replacement of CFC 12 in Domestic Equipment. Int. J. of Refrigeration, 11(4), 284-291.
Rajapaksha, L. (2007). Influence of special attributes of zeotropic refrigerant mixtures on design and operation of vapour compression refrigeration and heat pump systems. Energy conversion and management, 48(2), 539-545.
Richard, R. G., & Shankland, I. R. (1992). Flammability of alternative refrigerants. ASHRAE journal, 34(4), 20-24.
Richardson, R.N., & Butterworth, J.S. (1995). The Performance of Propane/Isobutane Mixtures in a Vapour Compression Refrigeration System, Int. J. of Refrigeration, 18, 58-62.
Ritter, T.J. (1996). Flammability-Hydrocarbon Refrigerants. Proceedings of the Institute of Refrigeration Conference, Safe and Reliable Refrigeration, London.
Hammad, M.A., & Alsaad, M.A. (1999). The use of Thermodynamic Properties of Refrigerants and Refrigerant Hydrocarbon Mixture as Refrigerants in Domestic Mixtures. (2002). NIST Standard Reference Database Refrigerators. Applied Thermal Engineering, 19, 1181- version 7.0. Gaithersburg. 1189.
Jung, D., Kim, C. B., Lim, B. H., & Lee, H. W. (1996). Wongwises, S., Kamboon, A. & Orachon, B. (2006).
Testing of a hydrocarbon mixture in domestic Experimental Investigation of Hydrocarbon Mixtures refrigerators. ASHRAE Transactions, 102(1), 1077- to Replace HFC-134a in an Automotive Air 1084. Conditioning System. Energy Conversion and Management, 47, 1644-1659.
Jung, D., Kim, C., Song, K., & Park, B. (2000). Testing of Propane/Isobutene Mixture in Domestic Refrigerators. International Journal of Refrigeration, 23, 517- 527.

International Journal of Thermodynamics-Cover

ISSN: 1301-9724
Yayın Aralığı: Yılda 4 Sayı
Başlangıç: 1998
Yayıncı: -

Arşiv