Integration methods for floating offshore wind farms

The amount of floating offshore wind farms under development has drastically increased over the past years as the technology becomes viable for pre-commercial and commercial scale projects. Projects of this size require a streamlined, efficient production of the complete floating offshore wind turbine (FOWT), not only for manufacturing the...

24/7 Green Light for Heli-Ops: A novel method to predict the impact of ship superstructure design on helicopter operations through aerodynamic analysis in the early design phase

By 2030, a new amphibious transport ship is to be available for the Dutch Royal Navy. In light of the foreseen rise in airborne operations from the ship, more insight is desired into the impact of ship design choices on helicopter operational availability. There is need for a predictive tool, which can be used in the early design phase of the...

Risk-based security assessment of transmission line overloading considering spatio-temporal dependence of load and wind power using vine copula

Location of wind power plants and demand centres are not always close by; hence, the transmission of energy puts a burden on existing grid infrastructure. This unwanted burden necessitates transmission lines to operate more and more frequently close to their operating limits. To alleviate such situations, this research addresses the advantages...

Vessel motion limits to guarantee operable pipe integrity: Methodology to determine vessel motion limits

<br/>Vessel motion limits to guarantee operable pipe integrity<br/>Subsea pipelines are extensively used to transport oil and gas from offshore facilities to offshore terminals, pump stations or to the coast. As the installation of pipelines makes up a significant percentage of the total costs of a project, the workability of the installation...

Probabilistic downtime analysis for complex marine projects: Development of a modular Markov model that generates binary workability sequences for sequential marine operations

A complex marine project consist of series of operations, with each operation subject to a predefined operational limit and duration, depending on the equipment being used. If actual weather conditions exceed the operational limit, then the operation cannot be executed and hence downtime occurs. It is up to contractors, such as Boskalis, to...

Probabilistic downtime analysis for complex marine projects: A state-of-the-art model based on Markov theory to generate binary workability sequences for sequential operations

A marine operations encounters downtime if its operational limit is exceeded during project execution. Accurate information about the expected downtime during a marine project is important information in the tender phase of such a project. The purpose of this thesis is therefore to give insight in the available methods for downtime analysis in...

Project Specific Vessel Motion Based Abandonment Criteria

When harsh weather conditions are expected during an offshore pipeline operation, the decision to start the abandonment procedure has to be taken based on pipeline integrity limits. The pipeline integrity which is analysed by a maximum design sea state does not correspond to the situation offshore, because sea states always occur in a different...