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Experimental study of film condensation on horizontal grooved tubes

✍ Scribed by A.F. Mills; G.L. Hubbard; R.K. James; C. Tan

Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
836 KB
Volume
16
Category
Article
ISSN
0011-9164

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✦ Synopsis

Experiments

Ire reported for condensation of steam on horizontal grooved tubes of 1.9 cm diameter with 14.2 grooves/cm (36 tpi Standard American Screw Thread). Three tube wall materials were used: copper. brass and 70-30 cupronickel. The effect of noncondensable gas was investigated'for steam-air mixtures in downward forced flow. Heat transfer enhancements of up to a factor of 5.5 were obtained with the brass tube, The deleterious effect of noncondensable gas proved to be no more serious than for smooth tubes. An overhead drip rate of up to ten equivalent tubes caused no significant decrease in heat transfer.

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