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An experimental study was performed to investigate the subcooled flow boiling characteristics of R134a in a horizontal helically-coiled tube at low mass flux, low pressure and constant heat-flux conditions. The experimental parameters are pressures of 0.412~0.653MPa, heat fluxes of 0.11~10.9kW/m2, mass fluxes of 147~249kg/m2s and inlet subcooled temperatures of 6.0~11.0°C. The variation of wall temperatures at different positions on the circumference of the test sections, the heat transfer coefficients and the effect of heat-flux, mass flux and inlet subcooled temperature on the subcooled flow boiling were discussed in detail. A new correlation was developed to predict the heat transfer coefficients for subcooled flow boiling of R134a in horizontal helically-coiled tubes.
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- Original title: Experimental study on subcooled flow boiling characteristics of R134a in horizontal helically-coiled tubes.
- Record ID : 30015467
- 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.2015.0709
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Indexing
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Themes:
Thermodynamic measurements;
HFCs - Keywords: R134a; Horizontal tube; Subcooling; Expérimentation; Flow; Boiling
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