Experimental Augmentation of Heat Transfer in a Shell and Tube Heat Exchanger using Twisted Tape with baffles and hiTrain Wire Matrix Inserts _ A Comparative Study

International Conference on Advances in Manufacturing, Materials and Energy Engineering 2018

材料科学;能源学

Bedi, Raman^1 ; Kiran, K.^1 ; Mulla, A.M.^2 ; Manoj^3 ; Hebbar, Gurumoorthy S.^1

Department of Mechanical and Automobile Engineering, Faculty of Engineering, Christ University, 560074, India^1

Department of Mechanical Engineering, SECAB Institute of Engineering and Technology, Vijaypura

586101, India^2

Department of Mechanical Engineering, Guru Nanak Dev Engineering College, Bidar

585403, India^3

关键词: Augmentation techniques;    Comparative studies;    Experimental investigations;    Heat transfer characteristics;    Heat transfer rate;    Shell and tube exchangers;    Shell and tube heat exchangers;    Twisted tape insert;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/376/1/012003/pdf
DOI  :  10.1088/1757-899X/376/1/012003

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Heat transfer, a mere process of exchange of heat due to a temperature gradient, plays a vital role in industries and domestic applications. Among all the heat exchangers, Shell and Tube Exchanger are used predominantly due to their compact and robust design. For a given design to increase the heat transfer characteristics needs a research investigation. Among all augmentation techniques, a passive method found widely used as it avoids mechanical modification of the existing heat exchanger and addresses only on flow geometry. Twisted tape inserts are extensively used to change the flow geometry of fluid on the tube side. The present research work intended on utilising twisted tape, twisted tape with baffles and hiTrain wire matrix inserts. Experimental investigation reveals that inserts efficiently disturb the tube side fluid flow, in turn, increases pressure drop which increases the fluid wall shear and hence enhances the substantial increase in tube side heat transfer rate. At lower Reynolds number twisted tape with baffles has comparatively higher heat transfer coefficient, and at higher Reynolds, number hiTrain wire has comparatively higher heat transfer coefficient. Friction factor decreases linearly from twisted tape with baffles to hiTrain wire matrix as Reynolds number increases.