An Experimental Study on Dynamic Performance of Large Floating Wave-Offshore Hybrid Power Generation Platform in Extreme Conditions

Kim, Kyong Hwan; Hong, Jang Pyo; Park, Sewan; Lee, Kangsu; Hong, Keyyong

doi:10.7846/jkosmee.2016.19.1.7

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…Apart from that, RAO can also be interpreted as the relationship between the response amplitude and the wave amplitude (ζresponse/ζwave). Though, technologies that can minimize the effects of waves and actively reduce fluctuations are needed [19].…”

Section: Modellingmentioning

confidence: 99%

Geometric analysis of pontoon and mooring line towards hydrodynamic response

H.,

A.,

2024

E3S Web Conf.

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Floating Photovoltaics (FPV) are renewable energy producing technological breaktroughs whic are suitable to circumtances of lakes across Indonesia. The core of this technology is the function of working transformers installed on the pontoons. An FPV with 145 Mwac capacity is designed to run on Cirata weir by utilizing pontoons with the length of 16.5 meters. The hydrodynamic response in the form of plane and rotation movements due to surrounding loads (including but not limited to wave, wind and sea depth data) calculated by using Response Amplitude Operator (RAO) concept. The wave period measured in meter from 0 to 180 ° incoming degree, the biggest translational response comes from pontoon i.e 0.986 (m/m) in sway direction, spread mooring is used to limit the pontoon’s movement. Using weighing concept, in operating condition Tension Mooring Line is obtained at the value of 1.67 for pontoon. While in extreme condition the obtained value is 2.5.

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Section: Modellingmentioning

confidence: 99%

Geometric analysis of pontoon and mooring line towards hydrodynamic response

H.,

A.,

2024

E3S Web Conf.

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“…In the East Sea, where the actual FOWT will be installed, the water depth is 144 m, which is reduced to the model scale of 1.6 m. The water depth of the ocean engineering wide tank of the UOU is 2.5 m, so the target water depth can be adjusted using the mooring tables of height 0.9 m. To match the geometric similarity of the mooring lines, the mooring tables were installed in the vicinity of the mooring lines [24]. However, this may cause hydrodynamic problems and should be verified in advance, i.e., the hydrodynamic forces may differ depending on whether the regular wave of a specific wavelength is in deep water or finite depth water.…”

Section: Effect Of the Mooring Tablesmentioning

confidence: 99%

Experimental and Numerical Analysis of a 10 MW Floating Offshore Wind Turbine in Regular Waves

Ahn

Shin

2020

Energies

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Floating offshore wind turbines (FOWTs) experience fluctuations in their platforms, owing to the various wave and wind conditions. These fluctuations not only decrease the output of the wind power generation system, but also increase the fatigue load of the structure and various equipment mounted on it. Therefore, when designing FOWTs, efficient performance with respect to waves and other external conditions must be ensured. In this study, a model test was performed with a 10 MW floating offshore wind turbine. The model test was performed by scaling down a 10 MW FOWT model that was designed with reference to a 5 MW wind turbine and a semisubmersible platform by the National Renewable Energy Laboratory and the DeepCwind project. A scale ratio of 1:90 was used for the model test. The depth of the East Sea was considered as 144 m and, to match the water depth with the geometric similarity of mooring lines, mooring tables were installed. The load cases used in the model test are combined environmental conditions, which are combined uniform wind, regular waves and uniform current. Especially, Model tests with regular waves are especially necessary, because irregular waves are superpositions of regular waves with various periods. Therefore, this study aimed to understand the characteristics of the FOWTs caused by regular waves of various periods. Furthermore, in this model test, the effect of current was investigated using the current data of the East Sea. The results obtained through the model tests were the response amplitude operator (RAO) and the effective RAO for a six degrees-of-freedom motion. The results obtained from the model tests were compared with those obtained using the numerical simulation. The purpose of this paper is to predict the response of the entire system observed in model tests through simulation.

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“…The type of floating platform is selected based on the mooring system, the number of wind turbines, site requirements, construction, grid connection, and operating conditions of the sea [13]. Recently, the concept of multiple wind turbines on a floating platform has drawn attention because they are more stable and enable the use of higher towers and hence greater capture of wind energy [14][15][16][17][18][19][20][21][22][23]. The installation and mooring costs can be reduced by employing multiple wind turbines on a single platform as they can share common mooring lines [24].…”

Section: Introductionmentioning

confidence: 99%

“…A series of model tests were performed on the scaled model of MUFOWT by the research institute in Korea. The dynamic motions of wave energy converters were excluded from the model tests by fixing them to the platform [16][17][18]. A similar type of hybrid wind-wave floating offshore platform was considered by Lee et al [19] to analyze the multi-body hydrodynamic interactions in a frequency domain.…”

Section: Introductionmentioning

confidence: 99%

Design and Stability Analysis of an Offshore Floating Multi-Wind Turbine Platform

Bashetty

Özçelik

2022

Inventions

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The multi-wind turbine platform technology has the potential to harness the significant source of offshore wind energy in deep waters. However, the wake interference between the turbines on the multi-wind turbine platform can cause a reduction in power production; hence, it is important to study the wake effects in the initial phase of the design. This paper studies the effects of wake interference between the wind turbines on three different platform configurations to find a suitable configuration for the wind turbines on a multi-turbine platform. The analytical Larsen wake model and computational fluid dynamics (CFD) simulations are used for evaluating the wake effects. The platform configuration required for the wind turbines is determined based on the results of wake effects, and then a novel platform is designed. The free-floating stability behavior of the multi-wind turbine platform is analyzed using the hydrostatic analysis of the modeled platform. The wave-body interaction between the platform and the waves is predicted using the hydrodynamic analysis. A preliminary cost analysis of the multi-turbine platform concept is evaluated and compared with a single wind turbine floating concept. The results showed that the presented design is a promising concept that can enhance the offshore wind industry.

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An Experimental Study on Dynamic Performance of Large Floating Wave-Offshore Hybrid Power Generation Platform in Extreme Conditions

Cited by 8 publications

References 6 publications

Geometric analysis of pontoon and mooring line towards hydrodynamic response

Geometric analysis of pontoon and mooring line towards hydrodynamic response

Experimental and Numerical Analysis of a 10 MW Floating Offshore Wind Turbine in Regular Waves

Design and Stability Analysis of an Offshore Floating Multi-Wind Turbine Platform

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