Design of a constant diameter retractable Jet-ring with inside-out jetting combined with a Vibro-hammer

Reducing noise pollution during offshore monopile installation is crucial for marine life. Current installation methods create too much noise or do not have the certainty of reaching the required depths. By using a Vibrohammer combined with a Jet-ring this problem could be solved. A Jet-ring is a tool to reduce the sand induced inside shaft...

Model-free Positioning Control of a Payload by use of Wires

With the highly increased interest in offshore wind turbines and their technologies, the sector has witnessed rapid development in the past decade. For installed offshore wind turbines, there has been a lot of research conducted in the field of aero-, hydro- and structural dynamics, wind turbine-control, operation & maintenance, foundations...

Feasibility assessment of motion compensated cranes at an early design stage

Current service and installation activities to offshore wind turbines (OWTs) are mainly carried out by jack-up vessels. These vessels are less susceptive to disturbances caused by sea waves when they lift their hull from the water level by jacking down multiple legs to the seabed. An alternative is a crane mounted on a floating vessel, which has...

Workability optimisation of the Stella Synergy: during monopile installation with a motion-compensated gripper and using its DP-system

Using a floating vessel operating on its DP-system and using a motion-compensated pile gripper to install monopiles could be the installation method of the future. Therefore, this thesis focuses on this method. The main objective of this thesis project is to build a model that accurately describes the motions of the Stella Synergy, the monopile,...

Floating Installation of Windturbine Towers: A Conceptual Design Study

The demand for renewable energy is growing, due to a growing awareness among people about the effect of burning fossil fuels on the environment. Governments have signed climate agreements and are obliged to decrease their level of exhaust gasses. This change in attitude regarding the environment led to an upcoming market for renewables. A...

Numerical Modelling of a Large Diameter Cold Water Pipe Installation for Land Based OTEC and SWAC

For remote islands with high energy prices in the tropics, Ocean Thermal Energy Conversion (OTEC) can be a reliable energy source to supply a renewable baseload for the energy grid. Also, due to the increasing cooling demand, there is a need for sustainable cooling around the equator. This can be supplied by seawater air-conditioning (SWAC). For...

LIVING PROOF! An interactive installation concept for museum collections

This report documents a graduation project for the master Design for Interaction at the faculty of Industrial Design Engineering, at the TU Delft. It describes the design process of an interactive installation concept, for museums owning historic artefacts, to be used by families and visiting schools with a focus on children as a target group....

Upending of a Monopile for an Offshore Wind Turbine Foundation

The subject of this report is the upending of a floating monopile for an offshore wind turbine foundation. This is an assignment of Van Oord Dredging and Marine Contractors BV. An analytical model has been developed to simulate the upending of a monopile in MapleTM, based on the general theoretical principles and the experience of Van Oord. An...

Installation Limits of Large Diameter Cold Water Pipes in Deep Water for Land-Based OTEC Plants

The growing worldwide demand for clean, sustainable electricity generation and improved energy efficiency offers a valuable opportunity for the large scale implementation of OTEC (Ocean Thermal Energy Conversion) and SWAC (Sea Water Air Conditioning). One of the remaining technological challenges for large scale land-based OTEC and SWAC is the...

On the modelling of installation effects on laterally cyclic loaded monopiles

Monopiles are being used more extensively for offshore wind turbine foundation. Current guidelines on the construction of fixed offshore foundations still base the design of laterally loaded piles in sand on empirical data (p-y curves), originating from the oil and gas industry, from field tests executed in 1974 on 0.61 m diameter piles. However...

Layered Library in Cairo

Based on the mapping of spaces in Islamic Cairo where inhabitants continue to build within the rubble of destroyed buildings, the Layered Library proposes a spatial type based on gaps, glimpses, and wandering.