Summary
This paper shows comprehensive data and analysis for low GWP refrigerants evaporation in a microchannel tube with a hydraulic diameter of 0.643 mm. Measurements over the entire range of qualities are completed in one pass to have conditions similar to a real heat exchanger. Six heat transfer coefficients, six diabatic pressure drops, and six visualizations at exits are obtained simultaneously. This is especially important when testing mixtures where the local concentration of fluid (specifically in the liquid next to the wall) is changing as quality changes along the channel. Data are presented in an actual, non-isobaric condition due to pressure drop along the tube. Results presented and compared for different experimental condition (mass flux, heat flux, saturation temperature, etc.). Discussion of results is enhanced with video captures presenting flow patterns. Refrigerants R1233zd(E), R1336mzz(Z), and mixture R448A are under evaluation in this paper.
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Details
- Original title: Heat transfer coefficient, pressure drop, and flow visualization for some new low GWP refrigerants during evaporation in small tube.
- Record ID : 30026086
- Languages: English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Publication date: 2019/08/24
- DOI: http://dx.doi.org/10.18462/iir.icr.2019.1255
Links
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Indexing
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R1233zd(E) and R1234ze(Z) condensation inside a...
- Author(s) : LONGO G., MANCIN S., RIGHETTI G., 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
View record
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Correlation for flow boiling heat transfer of l...
- Author(s) : LIU Y., JIGE D., INOUE N.
- Date : 2021/05
- Languages : English
- Source: 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
View record
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Experiments on boiling heat transfer and pressu...
- Author(s) : WATANABE K., LIU Y., JIGE D., INOUE M.
- Date : 2021/06
- Languages : English
- Source: 2nd IIR Conference on HFO Refrigerants and Low GWP Blends
- Formats : PDF
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Flow patterns of some new low GWP refrigerants ...
- Author(s) : LI H., HRNJAK P.
- Date : 2019/08/24
- Languages : English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Formats : PDF
View record
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Thermophysical properties of low GWP refrigeran...
- Author(s) : FEDELE L., LOMBARDO G., GRESELIN I., MENEGAZZO D., BOBBO S.
- Date : 2023/05
- Languages : English
- Source: International Journal of Thermophysics - vol. 44 - n. 5
- Formats : PDF
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