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First Thermal and Fluids Engineering Summer Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

EFFECT OF TUBE BUNDLE LAYOUT ON KETTLE REBOILER USING EULERIAN MULTIPHASE CFD SIMULATION

DOI: 10.1615/TFESC1.mph.012649
pages 1765-1773

Kevin Farrell
Heat Transfer Research, Inc.


KEY WORDS: kettle reboiler, vapor blanketing, recirculation, Eulerian multiphase

Abstract

In this study, we simulate kettle reboilers by analyzing a two-dimensional slice with Eulerian multiphase CFD. We believe that by varying tube layout and tube cross-section as a function of elevation, we can affect recirculation and vapor escape from the bundle and thus improve the vapor generation rate. Our simulations show that both elliptical tubes and vapor escape lanes elevate the kettle exit vapor fraction, even when accounting for heat transfer area changes. Whether formed by the gaps between uniformly oriented elliptical tubes or by omitting tubes, these lanes appear to expedite the removal of vapor from the bundle. Our study shows that further investigation of the effects of these techniques in larger bundles of commercial interest is warranted.

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