Evaluation of vertical axis turbine characteristics for tidal current power plant based on in situ experiment

Han, Seol‐Heui; Park, Jinsoon; Lee, Kwangsoo; Park, Woo-Sun; Yi, Jin‐Hak

doi:10.1016/j.oceaneng.2013.03.005

Cited by 36 publications

(11 citation statements)

References 5 publications

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“…In the past decade, tidal stream energy converters have become a major focus for renewable energy research, with a number of turbine farms now in planning and development stages. At present, the majority of existing designs for tidal energy devices include three main types, namely horizontal-axis turbine-based energy converters [1][2][3], vertical-axis turbine-based energy converters [4,5], and flapping-hydrofoil energy converters. Compared with the first two conventional turbines, the flapping hydrofoil has several prominent features of relatively low tip speed, no centrifugal stress related to the rotating blade, and rectangular cross section of flow [6].…”

Section: Introductionmentioning

confidence: 99%

Principal Parameters Analysis of the Double-Elastic-Constrained Flapping Hydrofoil for Tidal Current Energy Extraction

Zhou

Yan

Mei

et al. 2022

JMSE

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Taking the rigid NACA0012 airfoil as the object, the key structural parameters of the spring–mass system that govern the dynamics of the double-elastic-constrained flapping hydrofoil are numerically studied in this paper. A two-dimensional numerical model, based on the CFD software FINE/Marine, is established to investigate the influence of the spring stiffness coefficient, frequency ratio, and damping coefficient on the motion and performance of the flapping hydrofoil. This study demonstrates that when the structural parameters are adequately adjusted, the power factor exceeding 1.0 has been achieved, and the corresponding efficiency is up to 37.8%. Moreover, this system can start and work within a wide range of damping coefficients. However, the hydraulic efficiency and power coefficient are sensitive to the change in damping coefficient, so it is very necessary to design an appropriate power output. Lastly, the most obvious parameter affecting the energy acquisition performance is the spring stiffness coefficients. Frequency ratios in the two directions have little influence on the peak value of the power coefficient, but they will cause the change of damping coefficients of the peak point. The key structural parameters studied in this paper provide a useful guideline for an optimized design of this interesting system through searching for the best performance.

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Section: Introductionmentioning

confidence: 99%

Principal Parameters Analysis of the Double-Elastic-Constrained Flapping Hydrofoil for Tidal Current Energy Extraction

Zhou

Yan

Mei

et al. 2022

JMSE

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“…They are also the focus of this paper. Presently, there are mainly two types of turbines used in ocean energy utilization technology, classified as the horizontal axis type and the vertical axis type, according to the relative position of the flow direction and the rotation axis [13][14][15]. The blades needed in this paper can achieve energy capture in both the horizontal and vertical directions, that is, self-starting rotation and energy conversion can be realized in both the horizontal and vertical directions, so can the existing two forms of turbines be combined?…”

Section: Blade Design and Analysismentioning

confidence: 99%

Hydrodynamic Analysis of a Marine Current Energy Converter for Profiling Floats

Liu

2018

Energies

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With the continuous improvement of people’s interest in ocean exploration, research on deep-water profiling floats has received more and more attention. Energy supply is the key factor that restricts the working hours of deep-water floats. For this consideration, a marine current energy converter for deep-water profiling floats is proposed in this paper. A spiral involute blade is designed so that energy can be captured in two directions. Specifically, in the shallow sea area, the energy of the radial current is captured, and in the deep-sea area, the axial relative flow energy of the floats’ autonomous up and down motions is captured. This captured energy is then converted into electrical energy to charge the battery and extend the working time of the floats. The novel spiral involute blade has unique hydrodynamic characteristics. The turbine’s self-starting performance and its capacity coefficient are the main research topics studied using the computational fluid dynamics technique. Through numerical analysis and simulation, the self-starting response range and energy capture were obtained. This paper verifies the feasibility of this innovative idea using a theory analysis and provides the basis for future prototype testing and further applied research.

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“…The Uldolmok tidal current power plant (TCPP) was built in Corresponding author, Ph.D., Principal Research Scientist, E-mail: yijh@kiost.ac a Graduate Student, E-mail: bjung@kiost.ac b Ph.D., Post-Doctoral researcher E-mail: jongwoon@illinois.edu c Ph.D., Assistant Professor, E-mail: ssim@unist.ac.kr 2009 near the Jindo Grand Bridge to develop technologies for tidal current power generation and to prepare for widespread implementation. Its performance in terms of the grid connection and power efficiency was verified (Han et al 2013). The structure experienced difficulties during construction because the tidal current on the Uldolmok Strait has very high speeds of up to 4-5 m/s and a short tidal stand time of approximately 30 min.…”

Section: Introductionmentioning

confidence: 97%

Issues in structural health monitoring for fixed-type offshore structures under harsh tidal environments

Jung¹,

Park²,

Sim³

et al. 2015

Smart Structures and Systems

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Previous long-term measurements of the Uldolmok tidal current power plant showed that the structure's natural frequencies fluctuate with a constant cycle-i.e., twice a day with changes in tidal height and tidal current velocity. This study aims to improve structural health monitoring (SHM) techniques for offshore structures under a harsh tidal environment like the Uldolmok Strait. In this study, lab-scale experiments on a simplified offshore structure as a lab-scale test structure were conducted in a circulating water channel to thoroughly investigate the causes of fluctuation of the natural frequencies and to validate the displacement estimation method using multimetric data fusion. To this end, the numerical study was additionally carried out on the simplified offshore structure with damage scenarios, and the corresponding change in the natural frequency was analyzed to support the experimental results. In conclusion, (1) the damage that occurred at the foundation resulted in a more significant change in natural frequencies compared with the effect of added mass; moreover, the structural system became nonlinear when the damage was severe; (2) the proposed damage index was able to indicate an approximate level of damage and the nonlinearity of the lab-scale test structure; (3) displacement estimation using data fusion was valid compared with the reference displacement using the vision-based method.

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Evaluation of vertical axis turbine characteristics for tidal current power plant based on in situ experiment

Cited by 36 publications

References 5 publications

Principal Parameters Analysis of the Double-Elastic-Constrained Flapping Hydrofoil for Tidal Current Energy Extraction

Principal Parameters Analysis of the Double-Elastic-Constrained Flapping Hydrofoil for Tidal Current Energy Extraction

Hydrodynamic Analysis of a Marine Current Energy Converter for Profiling Floats

Issues in structural health monitoring for fixed-type offshore structures under harsh tidal environments

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