Heat Transfer Enhancement Of The Aisi Stainless Steel 304 Elliptical Annular Fin Coated With The Carbon Nanotube

In this work, experimental heat transfer enhancement investigation on the AISI stainless steel 304 (AISI SS 304) elliptical annular fin with nano-coating of multi-walled carbon nanotubes (MWCNTs) and without nano-coating was carried out. The parameters, such as temperature distribution, thermal conductivity, convective heat transfer coefficient, shaped tube efficiency and fin effectiveness, are compared for different heat inputs. The result shows that the thermal conductivity of the stainless steel (AISI SS 304) was increased by 21.1% with MWCNTs coating. The surface temperature of the fin decreases with coating as thermal conductivity increases. Also, the convective heat transfer coefficient of the coated fin increased by 7%. The fin-shaped tube efficiency was increased by 6.2% and the fin effectiveness was increased by 21.8%. The uncertainty of the performance parameters was also determined, the values were +/- 5%.