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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

EFFECT OF THE NUMBER OF VERTICAL ROWS ON HEAT TRANSFER FROM A STAGGERED TUBE BANK OF SUBSEA COOLER

Get access (open in a dialog) DOI: 10.1615/IHTC16.her.023638
pages 4625-4632

Résumé

The current contribution deals with a model of a passive heat exchanger aimed at subsea processing of natural gas produced. The 3D unsteady buoyancy-induced water flow through staggered tube banks composed of plain serpentine pipes of external diameter D = 0.02 m is simulated at the Grashof number of 3×105 using the full Navier-Stokes equations with no turbulence model. The goal of the study is to examine numerically the effect of the transversal tube bank size on the cooler effectiveness: the results for the tube banks consisted of the finite number of vertical rows are compared with the data computed assuming the infinite number of pipes in the transverse direction. Development of unsteady flow and temperature fields along the flow path as well as spatial variation of the time-averaged heat transfer coefficient values were analyzed. It was found that the local heat transfer characteristics depend much on the cooler size in the transverse direction: the difference in the heat output from the correspondent sections of the central and side pipes exceeds 25%. However, the integral Nusselt number area-averaged over the entire cooler surface does not depend much on the number of pipes.