Kunjir Tushar et.al; International Journal of Advance Research, Ideas and Innovations in Technology © 2018, www.IJARIIT.com All Rights Reserved Page | 1888 ISSN: 2454-132X Impact factor: 4.295 (Volume 4, Issue 2) Available online at: www.ijariit.com Performance analysis of wind turbine using wind lens technology Tushar Kunjir tushkunjir@gmail.com G. H. Raisoni College of Engineering and Management, Pune, Maharashtra C. Limbadri c.limbadri@raisoni.net G. H. Raisoni College of Engineering and Management, Pune, Maharashtra R. R. Arakerimath rachayya.arakerimath@raisoni.net G. H. Raisoni College of Engineering and Management, Pune, Maharashtra ABSTRACT Wind power generation is proportional to the third power of the wind speed as per available thesis and mathematics. Wind energy is converted into electricity using wind turbine. According to the present design available of wind turbine, only 50% of kinetic energy of wind is converted into useful power output. If we are able to concentrate more wind energy over the turbine blade then the power output of wind turbine can be increased effectively. To embody this, scenario, a simple brimmed ring structure which intentionally creates turbulence behind the turbine blade to draw more air flow into the turbine is added externally at the periphery of the blade. This structure effectively increases the speed of the wind turbine leading to higher energy output from the wind turbine. Keywords: Wind turbine, Wind lens, the turbine blade. 1. INTRODUCTION Wind is a renewable form of energy generated because of uneven heating of earth surface due to solar radiation. Electricity can be generated by converting the kinetic energy of wind by using wind turbine. The wind turbine was made to produce energy for a clean and safe environment. With the increasing population and the economic development, the demand for energy is increasing notably. However, the limitation of fossil energy and the environmental problems caused by burning the fossil energy are becoming increasingly severe, which arouses the attraction to various types of renewable energies, such as solar energy, wind energy, biomass, etc. Among these types of renewable energies, wind energy is one of the most important ones. In recent years, wind energy has been developed rapidly for it is environmental friendly and renewable. The statistical data shows that the global installed capacity of wind turbines has kept increasing in the past ten years. The annual installed capacity of the wind turbines for 2015 is 63 GW, which increases by 22% compared with the one for 2014. Wind energy is extracted by wind turbine and transformed into electricity. Previous study has found that the power output of the wind turbine is proportional to the third order of the wind speed. Therefore, a slight augmentation of the wind speed can lead to notable increment of the power output. It was proved that a flanged diffuser adding around the rotor of the wind turbine, known as the wind lens, was able to increase the wind speed at the rotor significantly, and increase the power output of the wind turbine notably. Experiments and numerical simulations were carried out to study the efficiency of the wind lens. Ohya tested the power output of the wind turbine with wind lens and then compared it with bare wind turbine. The power output was found to be increased by 2-5 times after adding the wind lens to the wind turbine. According to the wind tunnel and field experiments, Gilbert et al. found that the power output was increased by 4 times with diffuser device. Abe and Ohya investigated the flow field around the diffuser pipe experimentally. The results indicated that the pressure at the exit of the diffuser was lower than that at the upstream, while the velocity at the entrance of the diffuser was higher than the incoming wind speed. PIV image by Ohya showed that the air at the entrance was drawn into the wind lens because of the pressure difference, which increased the flow rate inside the wind lens. The effect of the flange was investigated by Abe. The experimental data demonstrated that the velocity inside the wind lens with the flange was remarkably larger t han that without the flange. From the available data we found that the acceleration performance is directly proportional with the length of the wind lens. Ohya have carried out various experiment to understand the relation of the wind turbine energy output and the turbine blade parameters. The results of his experimental data showed that arc and cycloid presented better performance.