Offshore Wind Installation Using Feeder Vessels and Satellite Ports
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Solution Overview
Problem
The increasing size and weight of offshore wind turbines pose challenges in transportation, installation, and port logistics, as conventional ports struggle to accommodate the necessary space and operations, leading to inefficiencies and increased costs.
Innovation Solution
A method involving dedicated feeder vessels and installation vessels, where wind turbine components are loaded at hub ports, transported to satellite ports, and then installed at offshore sites using a system that includes jack-up legs and lift cranes, allowing for efficient component transfer and reduced transit times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional ports are used to support offshore wind farm operations, then the port can provide comprehensive facilities for component handling and pre-assembly, but the number of suitable ports is limited and they are far from the installation sites
Solution Approach 1:
The port system is segmented into two types: hub ports that provide comprehensive facilities for component handling and pre-assembly, and satellite ports that provide basic docking facilities closer to installation sites. This segmentation allows the system to leverage the advantages of both comprehensive port facilities and proximity to installation sites, resolving the contradiction between port capability and transit time.
2Loss of time
If the port is located close to the installation site to minimize transit time, then the transit time is reduced, but the port lacks sufficient space and facilities to accommodate large numbers of components and support pre-assembly operations
Solution Approach 1:
The port system is divided into hub ports with extensive space and facilities located away from installation sites, and satellite ports with minimal space and facilities located close to installation sites. Component loading occurs at hub ports, and feeder vessels transport components to satellite ports, which then transfer components to installation vessels. This segmentation resolves the contradiction by allowing satellite ports to be small and close to sites while hub ports provide the necessary space and facilities.
Solution Approach 2:
Feeder vessels act as intermediaries between hub ports and satellite ports, transporting wind turbine components from locations with comprehensive facilities to locations closer to installation sites. This intermediary mechanism enables the system to overcome the limitation of satellite ports having insufficient space and facilities while still benefiting from their proximity to installation sites.
3Ease of operation
If the port prepares extensive facilities for receiving, handling, and transferring components, then the operations can be supported, but the preparation time and cost increase significantly
Solution Approach 1:
Component handling operations are segmented between hub ports and satellite ports. Hub ports perform comprehensive component receiving, handling, and pre-assembly operations, while satellite ports perform only basic docking and transfer operations. This segmentation allows the system to maintain comprehensive component handling capability while reducing the preparation time required at satellite ports, as they do not need extensive facilities.
Solution Approach 2:
Component pre-assembly and preparation operations are performed in advance at hub ports before components are loaded onto feeder vessels. This preliminary action ensures that components are ready for installation when they arrive at satellite ports, eliminating the need for time-consuming preparation activities at the satellite ports themselves and thus reducing port preparation time while maintaining operational capability.
4Power
If larger wind turbine components are used to increase power output, then more energy can be captured, but the transportation and installation become more difficult and costly
Solution Approach 1:
The transportation and installation process is segmented into multiple stages involving different vessel types and port facilities. Feeder vessels transport large components from hub ports to satellite ports, and installation vessels with specialized equipment perform the actual installation at offshore sites. This segmentation allows the system to handle large, heavy components more efficiently by distributing the complexity across multiple specialized systems rather than requiring a single complex system to perform all functions.
Solution Approach 2:
Feeder vessels serve as intermediaries that transport large wind turbine components between hub ports and satellite ports, enabling the movement of oversized components that would be difficult to transport directly to installation sites. Installation vessels with specialized cranes and equipment act as intermediaries during the actual installation process, handling the heavy components and facilitating their assembly offshore. These intermediary systems reduce the overall complexity by breaking down the transportation and installation tasks into manageable stages.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces the time and cost associated with offshore wind farm installation by enabling the use of more locations for satellite ports, minimizing transit times for installation vessels, and allowing for continuous installation processes, independent of weather conditions.
Implementation Method 1
The installation vessel is equipped with jack-up legs that can be deployed to raise the vessel above the water
Implementation Method 2
The installation vessel is equipped with lift cranes for transporting the wind turbine components from the feeder vessel
Data Source
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AI summary
The present invention relates to a method and system for installing a wind farm at an offshore site, comprising loading wind turbine components onto feeder vessels at a hub port; transporting the feeder vessels loaded with the wind turbine components to a satellite port; docking a first one of the feeder vessels to an installation vessel at the satellite port; transporting the installation vessel and the first feeder vessel to the offshore site; and using the installation vessel to at least partially erect one or more wind turbines from the wind turbine components on the first feeder vessel at the offshore site. The present invention also relates to an installation vessel.