Prediction of the global performance of a finned tube air cooller and effect of radial slits on it's fin surface

Annapragada, S. Ravi and Raghavan, Vijay R. (2006) Prediction of the global performance of a finned tube air cooller and effect of radial slits on it's fin surface. In: 13th International Conference on Heat Transfer, Sydney, Australia.

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Abstract

In the present work, numerical modeling was used to study the local behavior of flow and energy variables to understand the underlying physics in a Finned Tube Cooler. The cooler under consideration is a single circular-fin air cooler tube confined in a duct. The optimizations of fin pitch and fin clearance as predicted by Rangan et al. (2003) have been elucidated based on the underlying physical principles involved. The model was further applied to study the augmentation of heat transfer and suppression of pumping power due to symmetric radial slits on the fin surface. Reversal of heat transfer direction is seen in the wake of the tube in the case of an unserrated fin. Radial slits reduce this region by aiding mixing of the flow. The heat transfer performance of the fin is enhanced by 5% by placing symmetric radial slits at the onset of flow separation in comparison against an unserrated heat exchanger. But the pumping power requirements also increase at a similar rate.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TP Chemical technology
ID Code:1832
Deposited By:Normajihan Abd. Rahman
Deposited On:04 Oct 2011 15:24
Last Modified:04 Oct 2011 15:24

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