This paper describes the development of a permanent magnet generator for small scale wind turbines. The generator has been designed for ease of manufacture so that it can be made by small mechanical engineering companies with limited electrical engineering knowledge. The generator has also been designed to have no cogging torque so that it can be used with all horizontal and vertical axis turbi...

Wind turbine is a technology which converting wind energy to electric power. Wind energy is easily accessible anywhere in the world and is one of renewable energy. However, in Kuala Terengganu, the lower average wind speed become one of the factors wind turbine has not been used widely as alternative method for generating the electric power. Thereby, small scale wind turbine which can generate ...

It seems that one of the effects of global warming is to increase rainfall in some parts of the world while reducing it in others. With the growth in demand for water the effects of any reduction on political stability and human happiness are profound. Several regions in the Mediterranean are vulnerable. The amounts of energy involved in weather systems are so very large that it is difficult fo...

Metamodels are developed and used for aerodynamic optimization of a ducted opening integrated into high-rise building to maximize the amplification factor within duct. The duct consists nozzle, throat, diffuser. 211 high-resolution 3D RANS CFD simulations performed generate training testing datasets. space-filling design Genetic algorithm data sampling optimization, respectively. performance fi...

This paper introduces two discrete-time controllers for horizontal axis wind turbines (HAWTs): a Linear Quadratic Gaussian (LQG) one and a model predictive (MPC) one. The LQG controller aims to strongly attenuate the disturbances influence on the system output. The control objective consists of keeping the output power constant, despite the wind variation, and thus reducing the fatigue that inv...

Accurate computation of the performance a horizontal-axis wind turbine (HAWT) using Blade Element Momentum (BEM) based codes requires good quality aerodynamic characteristics airfoils. This paper shows numerical investigation transitional flow over DU 91-W2-250 airfoil with chord-based Reynolds number ranging from 3 × 106 to 6 106. The primary goal present is validate unsteady averaged Navier-S...