Performance of flat tube bent at 90⁰ was compared with performance of straight flat tube under same conditions. It was observed that heat performance of nanofluids under different volume concentrations between 0.1 % to 0.4 % v/v of nanoparticles is better than that of base fluids and also increased by almost 19-20 % due to presence of bend in between flat tube. The study also proves that use of nanofluids can play very important role in decreasing overall size of heat transfer systems.

The nanofluid was passed through a virtual 3D model of a flat tube. Advantages of using nanofluids instead of pure base fluid were evaluated. The thermophysical properties of the nanofluid were calculated using correlations developed from experimental work. It was observed that the heat transfer performance increased with increase in particle concentration, temperature and Reynolds number.