Summary
Based on the existing researches, it is found that the COP and cooling capacity of R134a system may suffer deterioration from direct drop-in replacement of R1234yf, which is related to the relatively poor performance in condenser. The deep understanding of R1234yf condenser could be useful to design an effective R1234yfsystem. In this paper, micro-channel condenser models based on finite volume conception and e-NTU method are presented, five two-phase flow heat transfer correlations were compared in the models. From the models analyzed, Dobson & Chato’s correlation presents the best agreement with the experimental results. The mean error of the model is 3.2% forR134a and 5% for R1234yf.The model could be used to analyze the detail differences of flow and heat transfer of the two working fluids along the refrigerant flow direction and to design a suitable condenser for R1234yf system.
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Details
- Original title: Development of a micro-channel condenser model using R1234yf as working fluid and compared with R134a.
- Record ID : 30015356
- Languages: English
- Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
- Publication date: 2015/08/16
- DOI: http://dx.doi.org/10.18462/iir.icr.2015.0880
Links
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Indexing
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Themes:
Evaporators, condensers and other heat exchangers;
HFCs;
Heat transfer - Keywords: R134a; R1234yf; Comparison; Microchannel; Heat transfer; Condenser
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Heat transfer performance of a minichannel evap...
- Author(s) : MORTADA S., ZOUGHAIB A., CLODIC D.
- Date : 2010/06/16
- Languages : English
- Source: RCR 2010. 2nd IIR Workshop on Refrigerant Charge Reduction in Refrigerating Systems: Stockholm, Sweden, June 16-17, 2010.
- Formats : PDF
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HFO1234ze(E) vaporisation inside a Brazed Plate...
- Author(s) : LONGO G. A., MANCIN S., RIGHETTI G., et al.
- Date : 2016/07
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 67
- Formats : PDF
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Flow boiling of R1234yf in a 1 mm diameter chan...
- Author(s) : DEL COL D., BORTOLIN S., TORRESIN D., et al.
- Date : 2013/03
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 2
- Formats : PDF
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Experimental analysis of a minichannel air cool...
- Author(s) : ZILIO C., BRIGNOLI R., BROWN J. S.
- Date : 2011/08/21
- Languages : English
- Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
- Formats : PDF
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Boiling heat transfer and pressure drop of R134...
- Author(s) : MORTADA S., ZOUGHAIB A., ARZANO-DAURELLE C., et al.
- Date : 2012/06
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 35 - n. 4
- Formats : PDF
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