Boiling 2000 Phenomena and Emerging Applications Volume 2

ISBN Print: 1-56700-148-3

BOILING HEAT TRANSFER FROM A PTFE COATED HEATING TUBE TO ALCOHOLS

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DOI: 10.1615/Boiling2000.210
pages 819-836

C.B. Vijaya Vittala Department of Mechanical Engineering, North Eastern Regional Institute of Science & Technology, Nirjuli, Arunachal Pradesh- 791 109 (India)

Satish C. Gupta Department of Chemical Engineering, University of Roorkee, Roorkee - 247667 India

V. K. Agarwal Chemical Engineering Department, Indian Institute of Technology Roorkee, Roorkee - 247667

要約

This paper discusses an investigation on nucleate pool boiling of alcohols on a 21 µm thick polytetrafluoroethylene (PTFE) coated brass heating tube at atmospheric and subatmospheric pressures. The alcohols are methanol, ethanol and isopropanol. Boiling characteristics on such a surface are compared with those on an uncoated one. Augmentation of boiling heat transfer coefficient due to the coating of PTFE is a function of heat flux and pressure. Data analysis yields a criterion for the augmentation of heat transfer coefficient for the boiling of alcohols on a PTFE coated heating tube.

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