Search
Now showing items 1-10 of 18
Joint Distribution of Environmental Condition at Five European Offshore Sites for Design of Combined Wind and Wave Energy Devices
(Journal article; Peer reviewed, 2015)
The design of wind turbines requires information about joint data for wind and wave conditions. Moreover, combining offshore wind and wave energy facilities is a potential way to reduce the cost of offshore wind farms. To ...
Response analysis of a nonstationary lowering operation for an offshore wind turbine monopile substructure
(Journal article; Peer reviewed, 2015)
This study addresses numerical modeling and time-domain simulations of the lowering operation for installation of an offshore wind turbine monopile (MP) with a diameter of 5.7 m and examines the nonstationary dynamic ...
Dynamic Analysis of a Floating Wind Turbine with a Hydraulic Transmission System
(Chapter, 2015)
A 5 MW spar-type floating wind turbine equipped with high-pressure hydraulic transmission machinery is presented in this paper. The hydraulic transmission system consists of a hydraulic pump, a nonreturn check valve, a ...
Comparative Study of Lifting Operations of Offshore Wind Turbine Monopile and Jacket Substructures Considering Vessel Shielding Effects
(Chapter, 2015)
In this paper, the shielding effects from an installation vessel during lifting operations are investigated. The study compared the lifting operations of two commonly used offshore wind turbine substructures: the monopile ...
Fatigue analysis of a point absorber wave energy converter subjected to passive and reactive control
(Journal article; Peer reviewed, 2015)
This paper investigates the effect of a passive and reactive control mechanism on the accumulated fatigue damage of a wave energy converter (WEC). Interest is focused on four structural details of the Wavestar arm, which ...
Power Performance of the Wave Energy Converter in a Combined Wind and Wave Concept and its Survivability
(Chapter, 2015)
The spar torus combination (STC) concept consists of a spar floating wind turbine and a torusshaped heaving-body wave energy converter (WEC). The torus can move along the spar cylinder to absorb wave energy. The 5 MW NREL ...
Response Analysis of the Combined Wind/Wave Εnergy Concept SFC in Harsh Environmental Conditions
(Chapter, 2015)
In this paper a combined concept involving a semi-submersible type FWT and three rotating flap WECs is considered and its structural response is examined for harsh environmental conditions. The examined combined concept ...
Comparison of Experimental Data of a Moored Multibody Wave Energy Device With a Hybrid CFD and BIEM Numerical Analysis Framework
(Chapter; Peer reviewed, 2015)
In the present paper, a hybrid Computational Fluid Dynamics (CFD) and Boundary Integral Element Method (BIEM) framework is developed in order to study the response of a moored Multibody wave Energy Device (MED) to a ...
Effects of floating sun gear in a wind turbine’s planetary gearbox with geometrical imperfections
(Journal article; Peer reviewed, 2015)
This paper addresses the effect of gear geometrical errors in wind turbine planetary gearboxes with a floating sun gear. Numerical simulations and experiments are employed throughout the study. A National Renewable Energy ...
Comparison of wave load effects on a TLP wind turbine by using computational fluid dynamics and potential flow theory approaches
(Journal article; Peer reviewed, 2015)
Tension Leg Platform (TLP) is one of the concepts which shows promising results during initial studies to carry floating wind turbines. One of the concerns regarding tension leg platform wind turbines (TLPWTs) is the high ...