Comparison of Heat transfer Enhancement in Tube in Tube heat exchanger using Different Turbulent Generator

Abstract

In the present work experimental analysis for heat transfer in Tube In Tube heat exchanger with and without inserts and delta winglet is carried out. The heat transfer augmentation in the form of Nusselt number variation is established for two different length of insert and delta winglet. Thermal performance and pressure drop for 20 cm insert, 50 cm insert and delta winglet for Reynolds numbers range of 1400 to 6500 at annulus side have been studied. Results shows that the Nusselt number for long inserts is increase by 53% and the short inserts is increase by 27% as compared with the plain tube in tube heat exchanger.