Summary
A binary mixture R1123/R32 is anticipated as the new candidate to replace R410A and R32 for residential air conditioners. In this study, the experimentally quantified heat transfer coefficient and pressure drop during evaporation process in a horizontal microfin tube with an outer diameter of 6 mm is presented. The number of fins, fin height, spiral angle, and surface enlargement of the tested tube are 60, 0.269 mm, 18 deg, and 2.62, respectively. The heat transfer coefficient at a composition of 40/60 mass%, a temperature of 10 °C, and a mass flux of 200 kg m-2s-1 is almost comparable to that of R32; on the other hand, the pressure drop is somewhat lower. That is explained with the smaller surface tension and lower vapor velocity. The temperature glide is approximately 1 K at the corresponding pressure. It seems that the concerned mass transfer resistance by the volatility difference is relatively small.
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Details
- Original title: Evaporation heat transfer of HFO-1123/HFC-32 (40/60 mass%) flow in a horizontal microfin tube.
- Record ID : 30024830
- Languages: English
- Source: 1st IIR international conference on the application of HFO refrigerants, Birmingham, September 2-5 2018.
- Publication date: 2018/09
- DOI: http://dx.doi.org/10.18462/iir.hfo.2018.1129
Links
- See also: Evaporation heat transfer of HFO-1123/HFC-32 (40/60 mass%) flow in a horizontal microfin tube.
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Indexing
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Themes:
HFCs;
Heat transfer;
Blends - Keywords: Horizontal tube; Heat transfer coefficient; Microfin tube; R32; /en/search; Mixture; HFO; Expérimentation; Evaporation; Pressure drop
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Evaporation heat transfer of HFO-1123/HFC-32 (4...
- Author(s) : KONDOU C., KOYAMA S.
- Date : 2018/09
- Languages : English
- Source: 1st IIR international conference on the application of HFO refrigerants, Birmingham, September 2-5 2018.
- Formats : PDF
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Comparison of condensation heat transfer and pr...
- Author(s) : MATTY E. P., FRONK B. M.
- Date : 2021/05
- Languages : English
- Source: 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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Experiments on flow boiling characteristics of ...
- Author(s) : JIGE D., KIKUCHI S., EDA H., et al.
- Date : 2019/08/24
- Languages : English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Formats : PDF
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Flow boiling of low GWP zeotropic mixture R32/R...
- Author(s) : KONDOU C., BABA D., MISHIMA F., et al.
- Date : 2013/06/17
- Languages : English
- Source: 4th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
- Formats : PDF
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Flow boiling of non-azeotropic mixture R32/R123...
- Author(s) : KONDOU C., BABA D., MISHIMA F., et al.
- Date : 2013/12
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 8
- Formats : PDF
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