Published September 28, 2011
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Thermodynamic Analysis of R507A-R23 Cascade Refrigeration System
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Description
The present work deals with thermodynamic analysis
of cascade refrigeration system using ozone friendly refrigerants pair
R507A and R23. R507A is azeotropic mixture composed of HFC
refrigerants R125/R143a (50%/50% wt.). R23 is a single component
HFC refrigerant used as replacement to CFC refrigerant R13 in low
temperature applications. These refrigerants have zero ozone
depletion potential and are non-flammable and as R507A an
azeotropic mixture there is no problem of temperature glide. This
study thermodynamically analyzed R507A-R23 cascade refrigeration
system to optimize the design and operating parameters of the
system. The design and operating parameters include: Condensing,
evaporating, subcooling and superheating temperatures in the high
temperature circuit, temperature difference in the cascade heat
exchanger, Condensing, evaporating, subcooling and superheating
temperatures in the low temperature circuit.
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References
- Montreal protocol on substances that deplete the ozone layer. United Nations Environment programme (UNEP), 1987.
- UNEP Assessment report of the technology and economic assessment panel, UNEP Ozone Secretariat, Nairobi, Kenya.,2007
- Kruse,H.,Ru¨ ssmann,H. The natural fluid nitrous oxide - an option as substitute for low temperature synthetic refrigerants.International Journal of Refrigeration, 29 (5), 2006, 799-806.
- Nicola G.D., Giuliani G., Polonara F., Stryjek, R. Blends of carbon dioxide and HFCs as working fluids for the low temperature circuit in cascade refrigerating systems. International Journal of Refrigeration, vol.28, 2005, pp.130-140.
- Zhang, Y., Gong, M.Q., Zhu, H.B., Wu, J.F Vapor-liquid equilibrium data for the ethane + trifluoromethane system at temperatures from 188.31 K to 243.76 K. Journal of Chemical and Engineering Data, vol. 51 (4), 2006, pp. 1411-1414.
- Zhang, Y., Gong, M.Q., Zhu, H.B., Wu, J.F. Vapor-liquid equilibrium measurements and correlations for an azeotropic system of ethane + hexafluoroethane, Fluid Phase Equilibria vol. 240 (1), 2006, pp. 73-78.
- DiNicola, G., Giuliani, G., Polonara, F., Santori, G., Stryjek, R. Cascade Cycles Operating with CO2 + N2O Binary Systems as Low Temperature Fluid: Experimental Results, International Congress of Refrigeration, 2007, Beijing.
- Baolian Niu, Yufeng Zhang, Experimental study of the refrigeration cycle performance for the R744/R290 mixtures, International Journal of Refrigeration, vol. 30, 2007, pp.37-42.
- George L. Molenaar, Use of R-22/23 in lieu of R502/13 in a cascade refrigeration system, in: Proceedings of ASMENTC01 35th National Heat Transfer Conference, Anaheim, California (2001), pp. P243-P246. [10] Keumnam Cho, Jonghoon Park, Honggi Cho, Performance of the cascade system using alternative refrigerants, in: Proceeding of ASMENTC01 35th National Heat Transfer Conference, Anaheim, California (2001), pp. P595-P600. [11] Giovanni Di Nicola, Giuliano Giuliani, Fabio Polonara, Roman Stryjek, Blends of carbon dioxide and HFCs as working fluids for the lowtemperature circuit in cascade refrigerating systems, Int J Refrigeration 28 (2005) 130-140. [12] Robert Paul Wadell, Design of compact evaporators for ultra low temperature thermal management of microprocessors, Master thesis, Georgia Institute of Technology, 2005.