Paper Wind Turbine Blade Template

Efficient Wind Turbine Blade Design International Journal of Scientific & Engineering Research, Volume 5, Issue 3, March-2014 ISSN 2229-5518 1010 Efficient Wind Turbine Blade Design Adnan Miski Abstract — There are several issues with designing an energy saving wind turbine; the first one is to find the optimal blade length to achieve the demanded power (60 W). In order to do that, we need to calculate the unknown variables which is the monthly mean velocity (Vm), typical value for coefficient of performance and efficiency (Cp, ) and the Swept Area of Blades (A). The second problem is to find the typical air density and the capacity factor to achieve optimal power which is 60 Watts. Third problem is finding the tip speed ratio and the required number of blades for the turbine we are going to design. Fourth problem is the determination of blade Cord width 'C(r)' and the blade twist angle ' '. The last issue is to find the Wind turbine power curve. The paper proposed an efficient wind turbine design taking into consideration all the above mentioned issues.

Index Terms — Electric Generator, Efficient Blade Design, Energy Saving, optimal power, Tip Speed Ration, Weibull Distribution, Wind Turbine Design. 1 I NTRODUCTION ——————————  —————————— here are several issues with designing an energy saving wind turbine; the first one is to find the optimal blade length to achieve the demanded power (60 W).

Diagrams and Photos. Wind turbine blades paper template. Wind turbine blade paper template. Wind turbine blades paper template. Wind turbine blade side view. Wind turbine construction tools and material. Wind turbine's electric generator. Wind turbine's PVC Pipe. Learn how to to make a Paper windmill or pinwheel - a great tabletop decoration for outdoor parties.

In order to do that, we need to calculate the unknown variables which is the monthly mean velocity (Vm), typical value for coefficient of performance and efficiency (Cp,) and the Swept Area of Blades (A). The second problem is to find the typical air densi- ty and the capacity factor to achieve optimal power which is 60 Watts.

Download Ponyprog Para Windows 7 there. Third problem is finding the tip speed ratio and the required number of blades for the turbine we are going to design. Fourth problem is the determination of blade Cord width 'C(r)' and the blade twist angle ''. The last issue is to find the Wind turbine power curve.

2 L ITERATURE R EVIEW 2.1 What is a Wind Turbine Detailed Wind turbines, like aircraft propeller blades, turn in the moving air and power an electric generator that supplies an electric current. Simply stated, a wind turbine is the oppo- site of a fan. Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity.

The wind turns the blades, which spin a shaft, which connects to a gen- erator and makes electricity. (1) 2.2 Turbine Components For Horizontal turbine components include (Figure 1):  Blade or rotor, which converts the energy in the wind to rotational shaft energy;  A drive train, usually including a gearbox and a gen- erator;  A tower that supports the rotor and drive train; and  Other equipment, including controls, electrical cables, ground support equipment, and interconnection equipment. (1) 2.3 Coefficient of Performance Cp is called the power coefficient. Cp is the percentage of power in the wind that is converted into mechanical energy. The maximum achievable coefficient of performance Cp max is 0.59 given by Betz limit. In practice because of tip loss, wake swirl loss and profile drag loss the value of Cp being lowered than this limiting value. (2) Figure 1: Wind Turbine Diagram 2.4 Efficiency (ɳ) Energy conversion efficiency is the ratio between the useful output of an energy conversion machine and the input, in en- ergy terms.

(1) The actual amount of energy that can be extracted from the wind is less than the theoretical amount of energy available with the theoretical limit being about 60%. A typical efficiency for a wind turbine is about 40% which is about 40% of the power available in the area swept by the wind turbine blades.(2) 2.5 The Typical Value of Air Density The density of dry air at sea level is 1.225 kg/m3 or about 1/800th the density of water. But as altitude increases, the density drops dramatically. This is because the density of air is proportional to the pressure and inversely proportional to temperature.

And the higher you go into the atmosphere, the lower the pressure gets. Pressure is approximately halved for each additional increase of 56 km in altitude. (3) IJSER © 2014 International Journal of Scientific & Engineering Research Volume 5, Issue 3, March-2014 ISSN 2229-5518 3 P ROBLEM F ORMULATION 1011 The power output from a wind turbine given by: Table 3: Calculation for the monthly power (2) Where, P =Power (watts), = Air Density (about 1.225 kg/m3 at sea level), R = Blade length (m), A = .R2 (Swept Area of Blades (m2)), Vm = Wind mean velocity (m/s) CP = Coefficient of performance,  = Efficiency.