Experimental investigation of multiwall carbon nanotubes/water nanofluid pool boiling on smooth and groove surfaces

Boiling is an essential process for many industrial applications, such as refrigeration, distillation, and chemical processes. The effectiveness of the heat transfer processes determines the efficiencies of these applications. This study presents the experimental data analysis for pool boiling performance of 0.10, 0.15, and 0.20 wt.% of multiwall carbon nanotubes/water nanofluid on smooth and straight, square, and circular grooved surfaces. According to the experimental results, the configuration S4 with a 30 mm deep circular groove inclined at a 45 degrees angle and 33% higher than the base fluid on the smooth surface had the greatest enhancement in boiling heat transfer coefficient. The result indicated that the inclination of the circular groove had the potential to enhance significantly the pool boiling heat transfer process. Furthermore, this study demonstrated that analyzing the effectiveness of nanofluids in a variety of concentrations and geometrical configurations of heat transfer surfaces is still essential and desirable.

Automated summary

This study presents experimental data analysis comparing the performance of different concentrations and geometric configurations of carbon nanotubes/water nanofluids in boiling heat transfer. The results showed that a circular groove with a 45 degrees inclination and 33% higher than the base fluid on a smooth surface had the highest enhancement in heat transfer coefficient.