Heat Transfer Characteristics of a Two-Phase Closed Thermosyphons Using Nanofluids Based on SiC Nanoparticles

The main goal of the present study was to investigate of the thermal conductivity and heat transfer characteristics of two-phase closed thermosyphon (TPCT) with SiC/water nanofluids. The outer diameter and length of the TPCT were of 10 and 300 mm, respectively. The laser pyrolysis and TEM techniques were used for synthesis and characterization of the nanoparticles. The mixtures of water and nanoparticles were prepared using a double ultrasonic homogenizer. The measurement of thermal conductivity of SiC/water nanofluids were investigated between 20 degrees C and 50 degrees C, for two weight concentrations (0.5 and 1.0 wt%).%). The results show that the thermal conductivity of SiC/water nanofluids increases with the increasing of weight concentration of the nanoparticles and temperature. Also, effects of operating temperature and nanoparticles concentration on the heat transfer characteristics of TPCT were considered. The nanofluids based on SiC nanoparticles enhance heat transfer characteristics of TPCT compared with TPCT using water.