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Heat exchangers are the most commonly used devices for the transfer of heat among hot and cold fluids. Hence, for the better exchange of heat between the fluids, there is a need in modifications in the design of heat exchangers. There are different methods to increase the heat transfer rate such as increasing the surface area by adding fins, inserts in the tube like twisted tapes, wire coils, baffles etc. In the present analysis, a single tube heat exchanger with the twisted tape insert is used. The twisted tapes of three different H/D ratios are inserted and change in rate of heat transfer is observed for various twisted tape inserts. With the use of nanofluid, there is an increase in heat transfer rate. Here, carbon nanotubes (CNT)-Fe3O4 hybrid nanofluid of three different volume concentrations are used as working fluid.

CFD Analysis on Twisted Tape Heat Exchanger with Hybrid Nano Particle