Experimental study of passive heat transfer enhancement technique with the help of various factor by using twisted tape insert inside a tube in tube heat exchanger

Abstract

Enhancing heat transfer surface are used in many engineering function such as refrigeration , air
conditioning, chemical reactor and heat exchanger systems, hence many techniques has been investigated on
improvement of heat transfer rate and reduce the size and cost of the concerning equipment particularly in heat
exchangers. These techniques are categorized as active and passive technique .The active technique compulsory
external power while the passive technique does not require any external power. The passive technique are
expensive compared with the active technique since the swirl flow add manufacturing method is simple and can be
simply engaged in an offered heat exchanger .One of the most significant technique used are passive heat transfer
technique. These techniques when adopted in heat exchanger provide that the usually thermal performance enhanced
notably.
Heat transfer is very attractive field for functional, economic and environmental basis; it is nearly associated to each
part of human lives. In this project study about the types of heat transfer enhancement technique and how it works
accurately. In these report largely focused on the passive technique. This technique usually uses surface or
geometrical modifications to the flow channel by insert, incorporating or additional devices. For example, inserts
extra part, swirl flow devices, rough surfaces, extended surfaces, additives for fluids and coiled tubes.
The probable conclusion of my work is to find the effects of the Typical Twisted tapes (TT) on the heat transfer
improvement and friction factor behaviors in turbulent flow regimes (5000 ≤ Re ≤ 17,100) are described. The
Typical twisted tape, twisted tapes with dissimilar twist ratio (y/w=2.5, 3 and 3.5) are tested using the water as the
working fluid.