1. 18 December 20151 Drinking with the wind Friso Bos Nick Olthof RO-desalination mechanically driven by wind energy

2. 18 December 20152 Content Introduction Mechanical aspects Building the windmill Testing Recommendations

3. 18 December 20153 Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Mechanical engineering Minor

4. 18 December 20154 Introduction – Mechanical aspects – Building the windmill – Recommendations No electricity Direct coupling Maximum RPM Minimum RPM Run-dry protection

5. 18 December 20155 Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations No electricity Direct coupling Minimum RPM Maximum RPM Run-dry protection

6. 18 December 20156 Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Maximum RPM

7. 18 December 20157 Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Maximum RPM

8. 18 December 20158 Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Run-dry protection

9. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations

11. Transmission ratio 1:20

12. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Transmission ratio 1:20

13. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Transmission ratio 1:40

14. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Transmission ratio 1:40

15. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Transmission ratio 1:33 Average pressure 41 bar Start up pressure 30 bar

16. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Transmission ratio 1:33

17. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Rust

18. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Bevel gear unit The disadvantage of this bevel gear unit is that a contra torque of the vertical axle is exerted on the horizontal axle of the wings. This causes that the windmill will rotate itself out of the wind direction.

19. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Adjustment lever As a temporary solution a lever is placed that locks the big vane in a 90 degrees angle with the wings. However this solution automatically interferes with the high RPM protection.

20. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Flexible coupling The synthetic parts of the flexible coupling are being damaged, probably by the faltering load. The high load happens when the system is on the brake. The faltering load happens when the windmill exerts a too low torque on the pumps to run continuously.

21. Introduction – Mechanical aspects – Building the windmill – Testing – Recommendations Better accessibility of the tanks and bearings

22. Questions?