Experimental Study of Loop Thermosyphon Solar Water Heater using Water and Al2O3 Nanofluid as Working Fluid

The basic aim of conducted experiments was to investigate the thermal performance of thermosyphon heat-pipe solar collector under real operating conditions using distil water and Al2O3-water nanofluid as a working fluid with serpentine shape thermosyphon. The Effect of coolant rate, effect of inclination angle, effect of nanomaterial concentration on performance of solar heat pipe collector was studied experimentally. The nanoparticles used having average size 30-50 nm and disperse in water with 0. 3wt%,. 6wt% and 0.9wt% concentration. Magnetic string, Ultra sonication and surfactant (0. 01wt % SDS) technique is use to enhance stability of nanoparticle in water. From result it is observed that nanofluid charged heat pipe solar collector gives better performance than water charge. Also performance of solar collector was increases with increase in inclination of collector and concentration of nanomaterial. Increase in coolant rate also increases the performance of solar collector up to certain level.