Heat transfer augmentation by nano-fluids and Spiral Spring insert in Double Tube Heat Exchanger – A numerical exploration

The efficiency of the most of the thermal devices can be improved by increasing the heat transfer. Some process industries like power plant, automobile demand the heat transfer augmentation in either heating or cooling or evaporation on the devices like air conditioning, radiators, refrigerators, condensers etc. The available methods can be classified in to two category namely passive and active techniques. The objective of the research to improve the heat transfer in double pipe heat exchanger by passive techniques. The fluid mediums like water, titanium dioxide nano-fluid, Beryllium oxide or beryllia nano-fluid, zinc oxide nano-fluid and copper oxide nano-fluids are considered for analysis with the aim of increasing the thermal conductivity of fluid medium. The Spiral Spring insert used for offering the flow resistance and spread the fluid to surface to enhance the heat transfer. The numerical study is investigating the thermal and flow fields utilizing various types of nano-fluids with Spiral Spring insert in the double pipe heat exchanger. The Finite volume method employed for solve the continuity, momentum and energy equations the ANSYS 15.0 employed for conducting the numerical analysis.