CFD analysis of triple concentric tube heat exchanger

Abstract

Triple concentric tube heat exchanger consists of three tubes of different diameters connected concentrically. Triple concentric tube heat exchanger performs better than double concentric tube heat exchanger. Most of the previous studies used two fluids for different arrangement. Cold fluids flow from inner tube and outer annulus and hot fluid from inner annulus. Different parameters were found which affect performance of triple concentric tube heat exchanger. The present work involves CFD analysis of triple concentric tube heat exchanger by using previous research’s mathematical model, experimental model and correlation. The comparison is carried out between CFD result and literature result. Effectiveness of heat exchanger increases with increased inner tube diameter. Effectiveness of heat exchanger increases with increased inner annulus diameter at the beginning and decreases when flow becomes laminar.