Abstract
In the present Computational Fluid Dynamic (CFD) simulation, the impact of various shapes of alphabet twisted tape in a shell –tube type of heat exchanger on the pressure drop, temperature, velocity distribution, and heat transfer coefficient was studied numerically. The best shape of the twisted tape was selected by thermo-hydraulic analysis. SIMPLE algorithm and Finite Volume Method (FVM) were then implemented to solve the conversion formulas. Conversion equations were discretized using second-order upwind discretization. Comparing the results of different types of twisted tape, Case I (W-shaped tape) exhibited the best performance and the utmost pressure differences. Furthermore, the utmost heat transfer factor was obtained by W shape twisted tape. Also, the helical baffles illustrated the best performance of the shell-part baffles in the shell-tube type of heat exchanger. Comparison between single and two-phase flow by utilizing mixture model for heat transfer factor and pressure difference reveal the negligible changes. On the quant part, FOM amount have been shown a great significance (1.3439) in the shell part for helical baffle type.
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