Enhancement of Heat Transfer in a Pipe Fitted with Rectangular Cut Twisted Tape Inserts

This study has numerically analyzed heat transfer intensification in a pipe (U-loop) by incorporating rectangular-cut twisted tape inserts. This research uses a tubular pipe of 26.6 mm inner diameter and a 1935.62 mm long U-loop-shaped tubular pipe. The rectangular cuts are placed on one side of the twisted tape to create swirling along the flow region. From our simulation, we found the highest Nu number (357.59 at Re=17288.05) and better f (friction factor) for the tube installed with rectangular cut twisted tape insert compared to plain twisted tape and plain tube. It has also been yielded that the best thermal performance factor of 1.04 is established for rectangular-cut twisted tape inserts compared to other types. Since the rectangular cut twisted tape has increased the heat transfer rate, this concept can be used to facilitate the heat transfer rate in heat exchangers in various industrial sectors.