Indian Journal of Science and Technology
Year: 2016, Volume: 9, Issue: 13, Pages: 1-17
A. Siddique Ahmed Ghias1 , S. Vijay Ananth1 , M. Dev Anand2 and G. Glan Devadhas3
1Department of Mechanical Engineering, Agni College of Technology, Thalambur, Chennai – 603103, Tamil Nadu, India; [email protected] 2Academic Affairs, Department of Mechanical Engineering, Noorul Islam University, Kanyakumari - 629180, Tamil Nadu, India 3Department of Electronics and Instrumentation Engineering, Noorul Islam University, Kanyakumari - 629180, Tamil Nadu, India
Background/Objectives: An experimental investigation and a numerical study of characteristics of heat transfer of coil in shell heat exchanger is performed. Methods/Statistical Analysis: The effects of the change in shape of tube on the heat transfer are studied here. For this, a helical coil was designed and manufactured. The difference of this study from previous ones is that the geometry of the coil is different. Existing studies used only single stretch of helical coil but in this case there are two sets of helical coil connected by a small straight tube. The heat exchanger designed is of counter follow configuration to maximize the amount of heat transferred. In the experiment, keeping constant the flow rate of shell side, the side flow rate was kept on changing and for each tube side flow rate readings were taken for different temperatures. Wilson plots were plotted for obtaining the values of convective coefficient of heat transfer. Findings: The experimental set up was validated; the values for friction factor and Nusselt number were within agreeable limits of theoretical values. A numerical study of the heat exchanger was carried out using FLUENT. Applications/Improvements: The results obtain from FLUENT supports the value obtained from the experiment.
Keywords: Counter Flow, Friction Factor, Heat Transfer, Helical Coils, Nusselt Number
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