1 Copyright © 2016 by ICFD12 Proceedings of ICFD12: Twelfth International Conference of Fluid Dynamics 19-20 December, 2016, Le Meridian Pyramids Hotel, Cairo, EGYPT ICFD12-EG-5S05 Utilization of Wind Energy in Green Buildings Eng. Mahmoud Fouad Ahmed Ahmed Prof. Dr. Ahmed Farouk AbdelGawad Mechanical Power Engineering Dept., Faculty of Engineering, Zagazig University, Egypt ABSTRACT As known, buildings and structures are blamable for great consumption of electricity, water and material. Green and sustainable buildings aim to decrease the environmental impact of buildings and reducing the power consumption. One of the methods to achieve these goals is by using a wind-energy system. To design this system, big or small turbines (home- scale turbines) may be utilized. Using any type of these turbines depends on location, wind speed, and building structure. In this paper, a building model is introduced with a suitable system of wind turbines. KEYWORDS: Green building, Wind energy, Home-scale wind turbines I.INTRODUCTION Wind flow can be used to generate electricity. Wind energy is one of the best renewable energy types as it is cheap and clean. The power available from the wind is a function of the cube of the wind speed. Thus, as wind speed increases, power output increases up to the maximum output for the particular turbine. Wind energy systems are very important and useful. They help in lowering electricity bills. Also, they help in avoiding the high costs of having utility power lines extended to a remote location. In this paper, a suitable wind system is designed for a model of a green building. KEYWORDS: Renewable energy, wind energy system, rated power II.WIND TURBINE Wind turbine is a mechanical device which converts the kinetic energy of the moving wind to the electric energy. There are two types of wind turbines; vertical-axis wind turbines (VAWT) and horizontal-axis wind turbines (HAWT). Each type has its own advantages and disadvantages. However, the important concept or advantage to choose (VAWT) was the relation between the wind turbine and direction of wind. VAWT type is omni-directional and do not need to track the wind. This makes them more reliable due to their not requiring a complex mechanism and motors to yaw the rotor and pitch the blades. In addition, any claimed inefficiencies are in fact cancelled out by the VAWT's ability to take advantage of turbulent and gusty winds. Such winds are not harvested by HAWTs, and cause accelerated fatigue for HAWTs. Another concept to classify wind turbines depends on the size. There are large, medium and small sizes. The small-size turbine may be called home-scale wind turbine. This type was utilized in the present paper. III.HOME SCALE WIND TUBINES A small wind turbine is a wind turbine used for micro generation. As opposed to large commercial wind turbines, small-scale turbines for residential-scale use are available. Their blades are usually 1.5 to 3.5 m in diameter and produce 1- 10 kW of electricity at their optimal wind speed. Some units have been designed to be very lightweight in their construction, e.g., 16 kg [1]. IV.PARTS OF WIND TURBINE Each wind turbine needs different parts on the basis of its type and working condition. The following is a list of parts that are present in most of the common turbines, Fig. 1: (1) Blades, (2) Rotor, (3) Pitch, (4) Brake, (5) Low-speed shaft, (6) Gear box, (7) Generator, (8) Controller, (9) Anemometer, (10) Wind vane, (11) Nacelle, (12) High-speed shaft, (13) Yaw drive, (14) Yaw motor, (15) Tower.