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Journal of Enhanced Heat Transfer

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ISSN Druckformat: 1065-5131

ISSN Online: 1563-5074

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Indexed in

CONVECTIVE CONDENSATION OF R410A IN MICRO-FIN TUBES

Volumen 19, Ausgabe 6, 2012, pp. 515-525
DOI: 10.1615/JEnhHeatTransf.2012006001
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ABSTRAKT

An experimental investigation was performed for convective condensation ofR410A inside five micro-fin tubes with the same outer diameter of 5 mm and helix angle of 18°. Data are for mass fluxes ranging from about 180 to 650 kg/m2 s. The nominal saturation temperature is 320 K, with inlet and outlet qualities of 0.8 and 0.1, respectively. The results suggest that tube 4 has the best thermal performance for its largest condensation heat-transfer coefficient and relatively low pressure-drop penalty. The heat-transfer enhancement mechanism is mainly due to the surface area increase over the plain tube at large mass fluxes, while liquid drainage and interfacial turbulence play important roles in heat-transfer enhancement at low mass fluxes. In addition, the experimental data were analyzed using seven existing pressure-drop and four heat-transfer models to verify their respective accuracies.

REFERENZIERT VON
  1. BYUN HO-WON, LEE EUL-JONG, SIM YONG-SUP, LEE JEONG-KUN, KIM NAE-HYUN, CONDENSATION HEAT TRANSFER AND PRESSURE DROP OF R-410A IN A 5.0 MM O.D. SMOOTH AND MICROFIN TUBE, International Journal of Air-Conditioning and Refrigeration, 21, 03, 2013. Crossref

  2. Kim Nae-Hyun, Condensation heat transfer and pressure drop of R-410A in a 7.0 mm O.D. microfin tube at low mass fluxes, Heat and Mass Transfer, 52, 12, 2016. Crossref

  3. Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Advanced Internal Fin Geometries and Finned Annuli, in Heat Transfer Enhancement in Externally Finned Tubes and Internally Finned Tubes and Annuli, 2020. Crossref

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