Experimental study of local pitch variations on electric power generated by counter rotating wind turbine with single generator without gearbox

3rd Annual Applied Science and Engineering Conference

工业技术;自然科学

Muhtadi, R.Z.^1,2 ; Bramantya, M.A.^1

Department of Mechanical Engineering, Universitas Gadjah Mada, Jl. Grafika No. 2, Yogyakarta

55281, Indonesia^1

Dinas Bina Marga Provinsi Daerah Khusus Ibukota Jakarta, Jl. Taman Jatibaru No.1, Jakarta Pusat

10150, Indonesia^2

关键词: Axial distance;    Counter rotating;    Data collection;    Design and tests;    Electric power;    Electrical power;    Renewable energies;    Wind velocities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/434/1/012176/pdf
DOI  :  10.1088/1757-899X/434/1/012176

来源: IOP

【 摘 要 】

Wind energy is one of the clean renewable energy that can be used as an alternative to reduce fossil fuel consumption. The aim of this research was to design and test the performance of counter-rotating wind turbine (CRWT) model corresponded with wind velocity and planned power output. The CRWT has two rotors with a diameter of 0.70 m comprised of NACA 4412 airfoils, which separated by axial distance of 0.3D and connected directly to each shaft of DC generator without a gearbox mechanism. In this research, local pitch (θp) of the rear rotor can be varied as followed (-10, -5, 0, +5 and +10). The data collection was done in a wind tunnel with a constant wind speed of 4 m/s, and given a load from bulb lamp started from 0 to 4.5 watt every 0.75 watts. The result shows that the local pitch +10? produced the highest rotation and electrical power generated. The highest electrical power generated at a local pitch +10? was at load 0.75 watt in amount of 1.057 watts or 23.55% higher than normal rotor (θp = 0?). At the same load, the lowest electrical power generated was at the local pitch -10? which only produced 0.598 watts.