S-SS-3-29: CFD Simulations of Diabatic Shellside Viscous Flows
January 16, 2017For shellside diabatic flows of highly viscous fluids, Xist can predict inconsistent pressure drops and heat transfer coefficients. HTRI examined the transition between forced and natural convection in single-segmental and double-segmental exchangers with Alta-Vis oil and an asphalt blend as test fluids. Comparisons were made between experimental data, open literature, computational...
Is My Design OK? Applying API 661 Annex C to Air Cooled Heat Exchanger Designs with Viscous and High Pour Point Fluids
January 16, 2017Winterization in accordance with API 661 Annex C may need to be considered by designers when air cooled heat exchangers are operating in climatic extremes. In order to prevent operating problems in-situ, a temperature safety margin should be added to the critical process temperature to determine the specified minimum tubewall temperature....
Research Update: Maldistribution in Shellside Laminar Viscous Flow
January 16, 2017Xist can predict unexpected performances of shellside viscous fluids in laminar regimes, where thermal maldistribution is present. The heat transfer of viscous flows across vertical baffles is analyzed by CFD to determine impact of such non-uniformity. Maldistribution can be monitored using a viscosity-independent Richardson number. The Richardson relates the impact of...