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Salcedo Velasquez, Santiago (author)
Sustainable and renewable energies are essential in achieving climate targets set by the Paris Agreement and Sustainable Development Goals (SDGs). Floating offshore wind turbines (FOWTs) represent an innovative technology with considerable potential to contribute to these goals. However, being a relatively new technology, FOWTs pose challenges...
master thesis 2023
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Hoeksma, Bram (author)
Currently, our society faces a pressing challenge: global warming. The solution lies in the energy transition, which replaces fossil fuels with clean sources. This requires a global effort across all sectors, including shipping. While a significant portion of shipping relies on polluting fuels, the European Union’s Green Deal aims for climate...
master thesis 2023
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Veršnik, Ana (author)
The success of offshore wind farm installations is often related to the costs and time taken to be completed. Current installation strategies require several critical offshore lifts for the completion of a single wind turbine, as in most cases each component gets installed separately. This is time-consuming and has a direct link to the cost of...
master thesis 2023
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Scherpenhuijsen Rom, Erik (author)
This paper provides an initial feasibility study of the potential installation of iron powder energy generation systems aboard a marine service vessel. After a short introduction as to the relevance of this study, the state-of-the-art iron powder energy generation is investigated. This information is then used to decide which marine service...
master thesis 2023
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VOULTSOS, IOANNIS (author)
The energy transition towards carbon neutrality requires a rapid electrification of all energy sectors by 2050. In the EU-27, the REPowerEU strategy, initiated in March 2022, is pursuing this target even more ambitiously. However, in order to achieve the aforementioned goals, the increasing demand for green hydrogen will...
master thesis 2022
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Ramesh Reddy, L. (author), Milano, Daniel (author), Walker, John (author), Viré, A.C. (author)
The hydrodynamic characteristics are crucial for accurately analysing floating offshore wind systems. In this paper, the added mass and damping coefficients of a semisubmersible floater are examined around the natural periods of the surge, heave, and pitch motion, using computational fluid dynamics (CFD). The OpenFOAM CFD setup is validated...
journal article 2022
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Vis, Daan (author)
Semi-submersibles are common vessels in the offshore sector. These vessels usually have a bracing structure to restrain floater movement and to support the deckbox structure. The bracing configuration influences strength, fatigue and other semi-submersible parameters. The first assignment objective was to study the structural design impact on a...
master thesis 2021
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Lemij, Freek (author)
A rapid increase in global energy demand and the international objective of increasing the contribution of renewable energy to satisfy this demand have spiked the interest in offshore wind energy. Depletion of suitable locations for bottom founded turbines has led to a new chapter in offshore wind development: floating wind farms. This...
master thesis 2021
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Hoogendoorn, G. (author), van den Bos, W. (author), Polinder, H. (author)
Wind turbine industry is growing and future predictions are promising. However, a shortage of installation vessels could influence this growth in offshore wind industry. Commonly, wind turbines are installed in components using a jack-up vessel. Occasionally, wind turbines are installed fully assembled. Lifting above the wind turbine is not...
conference paper 2021
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Diez, T. (author), Rudolph, Gerd (author)
Local normal form theorems for smooth equivariant maps between infinite-dimensional manifolds are established. These normal form results are new even in finite dimensions. The proof is inspired by the Lyapunov–Schmidt reduction for dynamical systems and by the Kuranishi method for moduli spaces. It uses a slice theorem for Fréchet manifolds...
journal article 2021
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Boll, Lars Christian (author)
During offshore construction with a Semi-Submersible Crane Vessel (SSCV) the vessel is station keeping by means of Dynamic Positioning (DP). DP enables a vessel to keep position and heading by utilizing its own propulsion, while being exposed to the environmental forces caused by waves, wind and current. In a comparison study between offshore...
master thesis 2020
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Hoogendoorn, Gerben (author)
Wind turbine industry is growing and future predictions are promising. However, a shortage of installation vessels could influence this growth in offshore wind industry. Commonly, wind turbines are installed in components using a jack-up vessel. Occasionally, wind turbines are installed fully assembled. The center of gravity of a fully assembled...
master thesis 2020
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Korte, Ruben (author)
Once a semi-submersible is operating at an inconvenient draft (A shallow draft with limited water column above the pontoons), the passing waves over the pontoons can not keep their linear motion and energy will be transferred to higher harmonic wave frequencies. This means the hydrodynamic response will also contain energy at these higher...
master thesis 2019
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Schouten, Ewout (author)
In this thesis the differences between the monohull and semi-submersible are investigated. For a general heavy lift crane operation and its operational profile, the difference is performance and total cost are calculated. These are used to determine the turning point, the point where the semi-submersible is more favourable for a heavy lift crane...
master thesis 2018
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Huijs, Fons (author), Vlasveld, Ebert (author), Gormand, Maël (author), Savenije, F.J. (author), Caboni, Marco (author), LeBlanc, B.P. (author), Ferreira, Carlos (author), Lindenburg, Koert (author)
A semi-submersible Tri-Floater has been designed to support a 6 MW vertical axis wind turbine (VAWT) with active blade pitch control. Due to the low centre of gravity and large allowable floater tilt angle, a relatively small floater can be used to support a VAWT. Coupled simulations including hydrodynamics, mooring system, aerodynamics and...
journal article 2018
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Rivera Arreba, I. (author), Bruinsma, N. (author), Bachynski, E. E. (author), Viré, A.C. (author), Paulsen, B. T. (author), Jacobsen, N. G. (author)
Floating offshore wind platforms may be subjected to severe sea states, which include both steep and long waves. The hydrodynamic models used in the offshore industry are typically based on potential-flow theory, and/or Morison's equation. These methods are computationally efficient, and can be applied in global dynamic analysis considering...
conference paper 2018
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Jelia, Jawid (author)
Immersed tunnel elements are prefabricated in the construction yard and then transported to the construction site to be integrated into the tunnel. During the transportation and immersion, the floating tunnel element is connected via cables to the immersion barges/pontoons. In this study, the hydrodynamical behavior of a floating tunnel element...
master thesis 2017
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Leimeister, M. (author)
Floating offshore wind turbines are taking on more and more prominence, as the industry moves towards larger turbines, farther offshore, in deeper water. The increase in turbine size can reduce the costs of offshore wind energy, but requires larger support structures. Rather than redesigning the structure completely, a rational methodology for...
master thesis 2016
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Tromp, J.M. (author)
Heerema Marine Contractors is looking into a new semi-submersible crane vessel concept with an asymmetric hull. The necessity of braces (connections between the portside and starboard hulls) for this vessel is questioned, based on earlier vessel developments and operational experience. This study addresses the influence of braces on the...
master thesis 2016
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Dankers, P.H.J. (author)
In the world of superyachts there are many different toys to have an amazing luxurious experience. New is the private mini submersible that can carry up to five people depending on the size. However, you do not have to go deep to explore the magical underwater world and for some there is barrier to try out a submersible experience. The Scyllias,...
master thesis 2015
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