Heat Transfer from a Vertical Tube Bundle under Natural Circulation Conditions
Document Type
Article
Publication Date
12-1985
Publication Source
International Journal of Heat and Fluid Flow
Abstract
A rectangular loop (thermosyphon) was used to measure the average heat transfer coefficients for water at atmospheric pressure under natural circulation conditions. A twenty-one tube bundle with tubes 1.65 m long and 9.55 mm in diameter, and a pitch-to-diameter ratio of 1.33, was used as a test heat exchanger in one of the vertical legs of the loop. A natural circulation flow in the loop developed due to buoyancy differences of the fluid in its two vertical legs.
Flow visualization experiments were performed to determine the flow regimes associated with natural circulation flow longitudinal to a tube bundle. Empirical correlations for the average Nusselt number have been developed and are reported. Grid spacers arranged on tube bundles were shown to enhance heat transfer, especially for laminar flow, without any noticeable increase in pressure drop.
Inclusive pages
256-264
ISBN/ISSN
0142-727X
Copyright
Copyright © 1985, Elsevier
Publisher
Elsevier
Volume
6
Issue
4
Peer Reviewed
yes
eCommons Citation
Hallinan, Kevin P. and Viskanta, Raymond, "Heat Transfer from a Vertical Tube Bundle under Natural Circulation Conditions" (1985). Mechanical and Aerospace Engineering Faculty Publications. 69.
https://ecommons.udayton.edu/mee_fac_pub/69
Comments
Permission documentation is on file.