EXPERIMENTAL AND CFD ANALYSIS OF TUBE IN TUBE HELICAL COIL HEAT EXCHANGER

Mechanical Engineering

Heat exchangers are the important engineering systems with wide variety of applications including power plants, nuclear reactors, refrigeration and air- conditioning systems, heat recovery systems, chemical processing and food industries. Helical coil configuration is very effective for heat exchangers and chemical reactors because they can accommodate a large heat transfer area in a small space, with high heat transfer coefficients. Working towards the goal of saving energies and to make concise design for mechanical and chemical devices and plants, heat transfer play major role in design of heat exchangers. We are not use application of external power, but we can improve the heat transfer rate by modifying the design by providing the helical tubes, extended surface or swirl flow devices. We improve the heat transfer rate from helical coil tube-in-tube heat exchangers to use Computational Fluid Dynamics (CFD). My project aims to perform a numerical study of helical coil tube-in-tube heat exchanger with water as both hot and cold fluid. To improve the effectiveness, heat transfer rate and reduce power consumption, D/d geometrical parameter will be varied for different boundary conditions. The impact of this modification on Nusselt number, friction factor, pumping power required and LMTD variation of inner fluid with respect to Reynolds number was studied.

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