Ampelmann Demonstrator by David Cerda Salzmann
Offshore Access
Offshore Access
Offshore Access is NOT easy
Essential for turbine maintenance Offshore Access Offshore Access = Essential for turbine maintenance
Limited to calm weather conditions Boat-to-ladder Horns Rev access by boat: 1st winter: 5/7 days 2nd winter: 1/7 days Limited to calm weather conditions
Costly, requires deck, hazardous operation Helicopter hoisting Costly, requires deck, hazardous operation
Need for new access method? Future Prospects Larger wind turbines Larger wind farms Farther offshore Need for new access method?
Ampelmann
Ship is moving, structure is NOT Ampelmann Solution based on the problem: Ship is moving, structure is NOT
Active motion compensation Ampelmann Motion platform Active motion compensation Motion sensor Moving vessel
Ampelmann
As easy as crossing the street Ampelmann Invented by 2 TU Delft PhD students Wind Energy Conference, Berlin 2002 Code name “Ampelmann” As easy as crossing the street
Proof of Concept
Proof of Concept
Proof of Concept The concept works!
Industry comments Show that it works full-scale Show that it works offshore Prove that the system is safe Build a demonstrator!
Project
Design Requirements Hs = 2.0 m on a 50 m vessel Cylinder stroke 2 meter Maximum footprint 6 x 6 meter Redundant System
Safety & certification Planning R & D Shell, Smit, Heerema Interest clients Demo Start company Finance Prototype Safety & certification Construct Onshore testing Offshore testing Design Order components Sept 2006 Sept. 2007
Safety & certification Planning R & D Shell, Smit, Heerema Interest clients Demo Start company Finance Prototype Safety & certification Construct Onshore testing Offshore testing Design Order components Sept 2006 Sept. 2007 Components finished Safety system in development Programming control system Lloyd's Certification
Safety & certification Planning R & D Shell, Smit, Heerema Interest clients Demo Start company Finance Prototype Safety & certification Construct Onshore testing Offshore testing Design Order components Sept 2006 Sept. 2007 Testing this summer
Safety & certification Planning R & D Shell, Smit, Heerema Interest clients Demo Start company Finance Prototype Safety & certification Construct Onshore testing Offshore testing Design Order components Sept 2006 Sept. 2007 Commercialize after successful demo
Safety & certification Planning R & D Shell, Smit, Heerema Interest clients Demo Start company Finance Prototype Safety & certification Construct Onshore testing Offshore testing Design Order components Sept 2006 Sept. 2007 Motion platform Hydraulics Controls
Motion platform design Footprint and cylinder stroke given 6 x 6 m 2 m
Motion platform design Footprint and cylinder stroke given Load case: 10 tonnes
Motion platform design Footprint and cylinder stroke given Load case: 10 tonnes Optimized to forces and workspace
Motion platform design Motion range: Vertical 2.5 m Horizontal 3.3 m Rotations 50 °
Hydraulic design Redundant design Low power consumption Vessel motion simulations
Hydraulic design Pump pressure 240 bar Power demand 200 kW Piston accumulator 2 valves per cylinder
Control design Based on flight simulator Redundant Feed forward
Gangway Length: 8-16 meter Yaw: 2 x 180 degrees Pitch: +/- 20º
Construction Assembly this month
Offshore Testing Testing this summer
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