Danish firm KNUD E. HANSEN has unveiled its latest breakthrough in offshore technology with the “Jack-up on Jack-up” concept, designed to optimize the maintenance of offshore wind turbines. This self-elevating vessel features a work platform that lifts up to the height of the nacelle, allowing repair work to be carried out on the blades without the need for rope access, thus increasing the safety and efficiency of the process.
Explanatory video on the Jack-up on Jack-up ship maintenance concept. Source: Knud E. Hansen
Jack-up on Jack-up vessel characteristics
The vessel incorporates a telescopic weather deck that protects operations from adverse weather conditions, allowing repairs to be carried out both day and night. This design ensures more annual working hours compared to conventional methods, such as rope access, which in turn reduces downtime and improves maintenance planning.
The Jack-up on Jack-up also includes an air-conditioned workshop at the rear of the platform, which creates an industrial warehouse-like environment around the blades. This allows complex repairs to be carried out without the need to remove the blades and bring them ashore, minimizing costs and downtime.
Innovation in wind turbine maintenance
At 154 meters long and capable of working with turbines of up to 20 MW, this vessel is able to handle components of up to 1,000 tons at heights of up to 175 meters. The innovation doesn’t end there: a motion compensation system and a “cherry picker provide precise and safe access to the nacelles for more efficient repairs.
This design is currently patent pending, marking an important advance in the evolution of offshore maintenance. offshore maintenance and consolidating the company’s position as a leader in marine innovation.
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Source and photos: Knud E. Hansen