1. WIND MILLS Topic Topic: generation of energy Problems Problems: How the characteristics of the blades and the rotor influence the electric power? Realized by: JANEQUIN Realized by: William PONCE and Jeremie JANEQUIN

2. Plan A] General information A] General information B] Material B] Material C] Aerodynamics C] Aerodynamics D] Number blades D] Number blades E] Rotor E] Rotor F] Scale model F] Scale model G] Conclusion G] Conclusion

3. General information A] definition of A] definition of a wind mill B] How does a wind mill B] How does a wind mill function? C] Different types of wind C] Different types of wind mill 1) Horizontal axis 2) Vertical axis

4. How does a wind mill function?

5. Horizontal Axis

6. Vertical Axis

7. The influence of the number of blades 1]One – bladed 2]Two- bladed 3] Three- bladed

8. Materials used for the blades of the rotor 1] GRP ( glass fibre reinforced plastic) 2] Carbon fibres 3] Wood- epoxy 4] Alloys

9. Profile A] Dimension A] Dimension 1) Length 2) Width 2) Width B] Profile B] Profile 1) Generality 1) Generality 2) Effect of Wind 2) Effect of Wind 3) Arithmetic 3) Arithmetic C] Orientation C] Orientation

10. ROTOR 1] operating mode of the rotor 2] Rotor at fixed speed 3] Rotor at speed semi- variable 4] Rotor at variable speed 5] Diameter of the rotor