Summary
In this work, isobaric heat capacity of liquid refrigerants mixtures was investigated experimentally and theoretically. First of all, experimental isobaric heat capacity data of a representative HFC-32+HFO-1234ze(E) binary mixture was obtained by a modified Calvet calorimeter at different temperatures and concentrations. After that, a previously proposed corresponding state equation, which was used for estimation of isobaric heat capacity of pure liquid HFCs and HFOs refrigerants, was extended to mixtures. Different mixing rules for pseudo-critical parameters were tested and a comparison between predicted values and experimental data was carried out in search of a best mixing rule. In the end, the corresponding state equation coupled with the selected mixing rule was applied to other binary mixtures R-410A, R-507A and ternary mixtures R-404A, R-407C. It was found that the calculated results agreed well with their fundamental Helmholtz equations of state. The average absolute deviation was 0.88% and maximum absolute deviations were no more than 1.90%.
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Details
- Original title: Experimental isobaric heat capacity of liquid HFC-32+HFO-1234ze(E) mixture and extension of a predictive corresponding state equation to HFC mixtures.
- Record ID : 30023543
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 88
- Publication date: 2018/04
- DOI: http://dx.doi.org/10.1016/j.ijrefrig.2018.02.015
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Indexing
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Themes:
Thermodynamic measurements;
HFCs;
Blends - Keywords: Heat capacity; Corresponding state; Calorimeter; R32; R1234ze(E); Mixture; Expérimentation
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- 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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- Date : 2011
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- Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 28 - n. 4
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- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 98
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- Date : 2023/06
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 150
- Formats : PDF
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