Design and CFD Analysis on Heat Transfer in a Shell and Tube Condenser


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Abstract


The condensation of steam on single horizontal copper tube in a shell and tube condenser has been investigated using experimental and theoretical methods in this study. The outer surface of the tube was modified by brazing it with a copper wire longitudinally and helically to enhance the heat transfer coefficient. The effect of varying the pitch of the helically brazed wire was studied with 25mm and 35mm pitch.
Longitudinally Wire Brazed(LOWIB) and Helically Wire Brazed (HEWIB) copper tubes with pitch 25mm and 35mm were found to increase the heat transfer coefficient by a factor of about 1.5, 2 and 1.2 respectively. CFD is found to be an alternate method to time and cost consuming “PROTO BASED EXPERIMENTAL” techniques.
In this work the CFD results obtained using ANSYS 13 are validated with experimental results to achieve the best practice of CFD in this case. This best practice is utilized to find out the best modification in which rate of heat transfer is maximum and the deposition of condensate on the cold water pipe is minimum.


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Keywords


Computational Fluid Dynamics; Condensation; Enhancement of Heat Transfer Coefficient; Modelling and Numerical Simulation; Wire Wrapped Tube

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