The mDelta

In-Air, In-hook Balanced Heave Compensation

Delta Prototype 01:
First conceptual prototype

Ready to install Offshore Wind Turbines from floating vessels, increasing workability, reducing operation time.

The Delta adds AHC capability for in-air lifts to existing offshore heavy lifting cranes in a cost-efficient, low complexity manner. The tool can be placed in the hook and reduces heave motions up to 90-95% for heavy loads such as 600 mT and higher, using very limited power and gas volumes. Set down velocities are reduced to ~5-7 cm/s, limiting set-down impact loads.

Commercial

• 90-95% heave decoupling, set-down speeds between 3~10 cm/s

• ~20-40% increased workability for North Sea installations

• Potential campaign cost savings up to ~20%

• Compared to standard AHC: improved in-air performance, lease only when needed, no AHC-crane CAPEX required, ~80-90% lower energy use / power requirement

• Minimal mobilization time and costs (<1 day, fits in standard container)

• Performance proof for turbine manufacturer (strict set-down speeds)

Technical

• Current design compensates for hook movements of up to 2m heave

• Effective tool height: ~3 m beneath crane hook

• Weight: ~15% of lifted load

• Power: ~70-100 kW via umbilical for 600 mT

• Safe: 100% passive load support

• Designs ready for up to 600 mT, technology fit for 3000 mT and beyond