The current research work is based on the optimization of heat transfer of heat exchanger by implementing the twisted helical tape in cold and hot flow pipe. In order to increase the heat transfer rate, helical-tape inserts have enhancing the convective heat transfer in heat exchangers. In general, helical tape insert introduces swirl flow inside the tube, which consequently disrupts a thermal boundary layer on the tube surface. A virtual analytical model has been developed to study the performance of helical-tap insert at annulus of the inner pipe. It has been observed that there is a good agreement between the results for Nusselt number and friction factor. SST k-ω turbulent model has been selected as better turbulent model for further simulation. From the results, it has been found that, by using helical-tape inserts the heat transfer enhancement takes place in the expense of pressure drop.
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Abstract
