Wind power generation techniques are being promoted all over the world as a beneficial alternative among other renewable sources (Li, Chen 71). A wind turbine is defined as a rotating machine that is used to generate power by means of converting kinetic energy to mechanical energy. Kinetic energy is formed when the blades of the turbine captures wind, making the blades rotate in its axis. This motion of the blades creates mechanical energy that is used to generate electricity (Mahoney 1).
Wind turbines are very useful in power generation especially in places where wind velocity ranges from intermediate to high level. According to studies, wind contributes only less than 1% of the world's energy needs (Grose 1). Even if the percentage of contribution is very low, the use of wind turbines as means to generate electricity grow continuously. This is because people nowadays discover the good benefits of using wind turbines in terms of environmental factors.
[...] For fiberglass, it is suggested to use mould made of wood or aluminum Fabric Stacking - When the mould is ready, fabrics are laid up as a dry stack of materials. These fabrics are sometimes pre-pressed to the mould shape, and held together by a binder Resin Injection - A second mould tool is then fastened over the first. Resin is injected carefully into the cavity using a computer generated tube. The amount of resin is controlled in order to maintain the uniformity of resin on the material inside the mould. [...]
[...] Principle of Rotor Design Principle Formula Area of Rotor Cross D = diameter Section Theoretical Power of A = Area Wind that Goes to Rotor V = wind speed ( = air density Blade Tip Speed Ratio = Rotational speed in radians /stor Cross Section = diameterTheoretical Power of Wind that Goes to Rotor = Area V = wind speed ( = air density Blade Tip Speed Ratio Ω = Rotational speed in radians /sec R = Rotor Radius V = Wind “Free Stream” Velocity Power Coefficient Pt = Power developed by the turbine At = Area V = wind speed = air density Vardar, Ali and Eker, Bulent. [...]
[...] Shown in diagram 2 is a sample of a vertical axis wind turbine Types of Horizontal Axis Wind Turbine Blades Wind turbine can be classified as single bladed, double bladed, and three bladed. The cheapest among the four classifications is the single bladed wind turbine since it only consumes small amount of material and labor. On the other hand this design is not ideal since balance is also an important factor in wind turbine construction and single bladed wind turbines does not have anything to counter the weight of the blade. [...]
[...] These values are shown in Table 4 along with Diagram 11 for better visualization Design and Analysis of the 10 kW Horizontal Axis Wind Turbine Blade The AutoCAD for the design of one blade is shown below. After the establishing the design for the wind turbine blade, a CFD software was then use to analyse the performance of the blade. Graphs and analysis are shown below. Again, since the design was patterned to NACA 2412, the CFD analysis was also a bit similar to it. [...]
[...] However, the fluctuation in the wind power due to the rotor passing through the wind shade of the tower may give more fatigue loads on the turbine than with an upwind design (Quaschning 203) Material for Wind Turbine Blade and its Properties Glass Fibers Glass Fibers are the cheapest and most widely used reinforced fibers. Glass fibers are produced by drawing molten glass through small opening in a platinum die. The most common type of glass fiber that is used in wind turbine blades is the E-glass fiber. [...]
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