In this study, investigation of convective heat transfer enhancement with the use
of CuO-Polyaniline (CuO-PANI) nanocomposite based nanofluid inside vertical helically
coiled tube heat exchanger was carried out experimentally. In these experiments, the
effects of different parameters such as Reynolds number and volume % of CuO-PANI nanocomposite
in nanofluid on the heat transfer coefficient of base fluid have been studied. In
order to study the effect of CuO-PANI nanocomposite based nanofluid on heat transfer,
CuO nanoparticles loaded in PANI were synthesized in the presence of ultrasound assisted
environment at different loading concentration of CuO nanoparticles (1, 3 and 5 wt.%).
Then the nanofluids were prepared at different concentrations of CuO-PANI nanocomposite
using water as a base fluid. The 1 wt.% CuO-PANI nanocomposite was selected for the
heat transfer study for nanofluid concentration in the range of 0.05 to 0.3 volume
% and Reynolds number range of was 1080 to 2160 (+/- 5). Around 37 % enhancement in
the heat transfer coefficient was observed for 0.2 volume % of 1 wt.% CuO-PANI nanocomposite
in the base fluid. in addition, significant enhancement in the heat transfer coefficient
was observed with an increase in the Reynolds number and percentage loading of CuO
nanoparticle in Polyaniline (PANI).