A comparison of the tube-side performance of enhanced heat transfer tubing for naval condensers

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Author
Alexander, Ronald Keith
Date
1982-12Advisor
Marto, P.J.
Second Reader
Kelleher, Matthew
Metadata
Show full item recordAbstract
The data of several investigators conducting research in
the area of enhanced heat transfer in internally ribbed and
spirally corrugated tubes is compiled and examined to determine
the effects of the geometric characteristics of enhanced
tubing on flow resistance and heat transfer. The data are
compared to determine if there are any relations, either new
or previously published, which can be of use to the designer
to predict the friction factor and heat transfer coefficient
for a specified enhanced tube. Empirical relations are recommended for friction factor
and heat transfer coefficient for single-start and multiplestart
spirally corrugated tubes based on the lav/ of the wall
similarity analysis and a heat transfer similarity analysis.
The empirical relations are compared to experimental data
for single-start and multiple-start corrugated tubes with
pitch-to-groove ratios greater than 10 and dimensionless
groove depths less than 0.05. The recommended relations
correlate with the experimental data for heat transfer
coefficient within ±15% for 94% of the specified tubes.
NPS Report Number
NPS69-82-008Collections
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