April 21, 2023 1

Drinking with the wind

Friso BosNick Olthof

RO-desalination mechanically driven by wind energy

April 21, 2023 2

Content

• Introduction• Mechanical aspects• Building the windmill• Testing• Recommendations

April 21, 2023 3

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

• Mechanical engineering• Minor

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Introduction – Mechanical aspects – Building the windmill – Recommendations

• No electricity

• Direct coupling

• Maximum RPM

• Minimum RPM

• Run-dry protection

April 21, 2023 5

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

• No electricity

• Direct coupling

• Minimum RPM

• Maximum RPM

• Run-dry protection

April 21, 2023 6

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

• Maximum RPM

April 21, 2023 7

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

• Maximum RPM

April 21, 2023 8

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

• Run-dry protection

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

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

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

• Transmission ratio 1:20

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

• Transmission ratio 1:20

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

• Transmission ratio 1:40

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

• Transmission ratio 1:40

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

• Transmission ratio 1:33• Average pressure 41 bar• Start up pressure 30 bar

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

• Transmission ratio 1:33

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

• Rust

Introduction – Mechanical aspects – Building the windmill – Testing –

Recommendations

• Bevel gear unitThe 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.

Introduction – Mechanical aspects – Building the windmill – Testing –

Recommendations

• Adjustment leverAs 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.

Introduction – Mechanical aspects – Building the windmill – Testing –

Recommendations

• Flexible couplingThe 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.

Introduction – Mechanical aspects – Building the windmill – Testing –

Recommendations

• Better accessibility of the tanks and bearings

Questions?