Heat transfer during in-tube condensation of CFC-113 with downflow in vertical, internally-enhanced tubes.

Author(s) : BRIGGS A., KELEMENIS C., ROSE J. W.

Summary

Accurate repeatable heat-transfer measurements have been made for condensation of CFC-113 with downflow inside enhanced "micro-fin" tubes. The heat transfer rate was calculated from the coolant flow rate and temperature rise. The surface temperature was found from thermocouples. One plain tube and nine enhanced tubes with different fin heights, helix angles and number of starts were tested. Enhancement ratios between 1.6 and 5.6 were found, with values depending on vapour-side temperature differance and vapour inlet velocity.

Details

Original title: Heat transfer during in-tube condensation of CFC-113 with downflow in vertical, internally-enhanced tubes.
Record ID : 1999-3411
Languages: English
Source: Proceedings of the 1998 Purdue International Refrigeration Conference.
Publication date: 1998/07/14
Document available for consultation in the library of the IIR headquarters only.

Links

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Indexing

Themes: CFCs;
Mass transfer
Keywords: Heat transfer coefficient; Extended surface; Measurement; Vertical tube; R113; Refrigerant; Condensation