TAGUCHI APPROACH FOR EXPERIMENTAL EFFICIENCY ANALYSIS OF ULTIMATE-BLACK COATED FLAT PLATE SOLAR COLLECTOR

Among solar energy applications, there are many studies on the thermal efficiency of flat/plane surface solar collectors, which enable the use of solar radiation as direct thermal energy. In this study, the effects of coating the radiatingsorbing surface of the flat (plane) surface solar collector with a nanotechnological blackbody and using nanofluids that increase the thermal conductivity coefficient in the collector on the thermal efficiency were investigated. In the study, solar radiation (600 Wm(2), 700 W/m(2), 800 W/m(2), and 900 W/m(2)), exchanger mass flow rate (100L/h, 2001.1h, 300L/h, and 400 Uh), nanoparticle material (Al2O3 and SiO2), and the effects of parameters such as nanoparticle ratio (0.1% and 0.2%) on efficiency were investigated. In the ANOVA table obtained according to the results of the study it has been revealed that the most effective parameters for thermal efficiency are nanoparticle material, radiation, and heat exchanger flow, respectively. In addition, it was determined that the optimum level for thermal efficiency was 900 W/m(2) as solar radiation with Al2O3 as nanoparticle material, 100-200 Uh as heat exchanger flow, and 0.1% as nanoparticle ratio, respectively. At these levels, the thermal performance of the flat surface solar collector was determined as 92.39%.