Recent Advances in Heat Transfer Augmentation by using Twisted Tapes: A Review

Abstract

In the past decade several studies on the passive techniques of heat transfer augmentation have been reported. The present paper is a review on progress with the passive augmentation techniques in the recent past and will be useful to designers implementing passive augmentation techniques in heat exchanger. In passive technique twisted tape insert is playing an important method to enhance the heat transfer characteristics of a heat exchanger without affecting much the overall performance of the system. The present review is organized in two different sections: augmentation of heat transfer in laminar flow and augmentation of heat transfer in turbulent flow.

Key words: Heat transfer augmentation, Passive methods, Twisted Tape inserts, Reynolds number, Friction factor