Replacement of R404A with propane in a light commercial vertical freezer: A parametric study of performances for different system architectures

Abstract Among natural refrigerants, propane (R290) is one of the most interesting solution to guarantee energetic performance with a low direct environmental impact. Safety concerns related to its flammability are limiting its introduction in some fields of refrigeration, therefore the research is focused on new solutions to reduce refrigerant charge. In this work, two design options for a professional freezer working with R290 are considered: the first one with standard volumes heat exchangers available on the market and the second one with reduced volumes heat exchangers. After the optimization of the performances with respect to the refrigerant charge and the regenerative capillary tube length, a remarkable increase of the performance with respect to the baseline version, working with R404A, was observed, while containing the refrigerant charge amount in the limits allowed by actual standards.

[1]  Bilal Akash,et al.  Assessment of LPG as a possible alternative to R-12 in domestic refrigerators , 2003 .

[2]  Per Lundqvist,et al.  IPCC/TEAP Special Report on Safeguarding the Ozone Layer and the Global Climate System , 2006 .

[3]  A. W. Mauro,et al.  Long-period food storage household vertical freezer: Refrigerant charge influence on working conditions during steady operation , 2011 .

[4]  V. I Dmitriyev,et al.  Determination of optimum refrigerant charge for domestic refrigerator units , 1984 .

[5]  Björn Palm,et al.  Refrigerant mass charge distribution in a domestic refrigerator. Part II: steady state conditions , 2006 .

[6]  José M. Corberán,et al.  Charge optimisation study of a reversible water-to-water propane heat pump , 2008 .

[7]  Christian J.L. Hermes,et al.  Assessment of the energy performance of household refrigerators via dynamic simulation , 2009 .

[8]  Mark W. Spatz,et al.  An evaluation of options for replacing HCFC-22 in medium temperature refrigeration systems , 2004 .

[9]  Alfonso William Mauro,et al.  A chart for predicting the possible advantage of adopting a suction/liquid heat exchanger in refrigerating system , 2007 .

[10]  K. S. Kumar,et al.  Computational and experimental investigation of low ODP and low GWP HCFC-123 and HC-290 refrigerant mixture alternate to CFC-12 , 2007 .

[11]  Björn Palm,et al.  Performance of a domestic refrigerator under influence of varied expansion device capacity, refrigerant charge and ambient temperature. , 2006 .

[12]  E. Granryd,et al.  Propane heat pump with low refrigerant charge: design and laboratory tests , 2004 .

[13]  S. Wongwises,et al.  Experimental study of hydrocarbon mixtures to replace HFC-134a in a domestic refrigerator , 2005 .

[14]  B. Palm.  Refrigeration systems with minimum charge of refrigerant. , 2007 .

[15]  Björn Palm,et al.  Refrigerant mass charge distribution in a domestic refrigerator, Part I: Transient conditions , 2006 .

[16]  J. Corberán,et al.  Effect of some design parameters and refrigerant fluid on the performance of a light commercial freezer. , 2012 .

[17]  Davide Del Col,et al.  Performance of a large capacity propane heat pump with low charge heat exchangers , 2010 .

[18]  Jun Wang,et al.  Start-up and shut-down operation in a reciprocating compressor refrigeration system with capillary tubes , 1990 .

[19]  Christian J.L. Hermes,et al.  A semi-empirical model for steady-state simulation of household refrigerators , 2009 .

[20]  M. Fatouh,et al.  Assessment of propane/commercial butane mixtures as possible alternatives to R134a in domestic refrigerators , 2006 .

[21]  A. Bontemps,et al.  Refrigerant charge in refrigerating systems and strategies of charge reduction , 2008 .

[22]  L. J. M. Kuijpers,et al.  The influence of the refrigerant charge on the functioning of small refrigerating appliances , 1988 .