International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Recent researches have shown that Nano-coating materials play a vital role in improving the performance of the PV cell operation, enhancing the life span and reducing its surface temperature. In addition to that, the Nano-coating can achieve many benefits such as making a smoother surface, stronger and less adhesive of externous on the surface of PV panel. In this work, the effect of nanomaterials coating using Titanium dioxide, silicon dioxide and Nano fluid Titanium dioxide on performance and temperature of PV cell when coated by these Nano particles separately with different thicknesses (0.5μm, 50μm,100μm and 300μm). To achieve these objectives ANSYS software technology (version.1) was used. The results showed that there is a significant effect specifically when using TiO2 Nano fluid. The maximum improvements were when using Nano coating TiO2 and SiO2 which are (0.62%) and (0.135%), respectively, at thickness 300μm and ambient temperature16 ͦ C in case without externous particles. But the minimum improvement was with TiO2 and SiO2 of coating thickness 0.5μm which are (0.0937%) and (0.0937%), respectively, at ambient temperature 23 ͦ C in presence of dust. The results of TiO2 Nano fluid with concentration and flow rate which are (5%and 0.01 kg/s), respectively, showed that the maximum improvement was (39.88%) in case without externous particles at ambient temperature 23 ͦ C, but the minimum improvement was (37.84%) in case with dust at ambient temperature 16 ͦ C.

Nano fluids is advantageous with high thermodynamic properties compared to pure fluids. In the last half century, rapid developments in production technology, which allows high-precision production of the micro heat exchangers and the use of the micro heat exchangers in different areas. These developments point researchers to enhance new methods in improving the heat transfer. One of these methods is; to improve fluid’s heat transfer by adding different particulates to the fluid. The nano fluids are the new type of heat transfer fluids that are made by adding nano particulates which has high thermal conductivity to a conventional fluid. Since the solid metal has a higher thermal conductivity than the basis fluid, the addition of the metallic particulates to the fluid increases the heat transfer of the mixture. In this study, for analyzing the temperature performance of fluids with Nano particulates; an experimental study was performed using water to determine the optimum mini channel length and mini channel diameter. Performance parameters are; channel length, tube mini channel diameter, the flow and the inlet temperature. According to the experimental results, the maximum temperature performance of the mini channel was found to be at L/D=250/3 (at Selcuk University condition). Therefore, with these results, the optimum mini channel length and mini channel diameter are determined for the high efficiency that is to be achieved by using nano fluids

The article deals with effect of the nano-fluids on the performance parameters of heat pipes. Stainless steel heat pipe was filled with a nano-fluid, a solution of copper sulphate and ferric chloride, up to 20% of the total volume of the heat pipe. Solutions of the nano-fluids were produced in the following concentrations: 1%, 2%, 3%, 4% and 5%. The performance parameters were measured on the experimental setup. The experimental measurements were carried out for different operating temperature and measured results show that the concentration of working fluid has effect on performance of the heat pipe.