Study on Optimum Power Take-Off Torque of an Asymmetric Wave Energy Converter in Western Sea of Jeju Island SCIE SCOPUS

Cited 1 time in WEB OF SCIENCE Cited 1 time in Scopus
Title
Study on Optimum Power Take-Off Torque of an Asymmetric Wave Energy Converter in Western Sea of Jeju Island
Author(s)
Ko, Haeng Sik; Kim, Sangho; Bae, Yoon Hyeok
KIOST Author(s)
Ko, Haeng Sik(고행식)
Alternative Author(s)
고행식
Publication Year
2021-03
Abstract
This study primarily investigates an optimum energy conversion efficiency of asymmetric wave energy converter (WEC). A power take-off (PTO) system that provides a constant load torque opposite to pitch motion was implemented. Incident wave conditions were selected based on the measured data in the western sea of Jeju Island, South Korea. An optimum torque was calculated by comparing the time-averaged extracted power with various PTO load torque. InterDyMFoam solver based on Reynolds-averaged Navier-Stokes (RANS) equations were used in an OpenFOAM v4.0 framework-an open-source computational fluid dynamics model-against the experimental results derived from the wave flume. The upward pitch excursion was induced by wave force due to the asymmetric WEC characteristics; however, the downward pitch excursion depends on its weight. Numerically, the PTO torque was only loaded in uni-direction against the upward pitch motion. Moreover, the optimum PTO torque was estimated by comparing the time-averaged extracted power. Finally, the optimum PTO torque was evaluated by an irregular wave as a function of significant wave height. The optimum PTO provides design information about the asymmetric wave energy converter to improve energy conversion efficiency.
ISSN
1996-1073
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/40174
DOI
10.3390/en14051449
Bibliographic Citation
ENERGIES, v.14, no.5, 2021
Publisher
MDPI
Subject
Computational fluid dynamics; Conversion efficiency; Navier Stokes equations; Power takeoffs; Torque; Torque measurement; Water waves; Asymmetric waves; Computational fluid dynamics modeling; Constant load torques; Design information; Incident waves; Irregular waves; Reynolds averaged Navier Stokes (RANS)equations; Significant wave height; Wave energy conversion
Keywords
asymmetric WEC; load torque; RANS; OpenFOAM; optimum PTO
Type
Article
Language
English
Document Type
Article
Publisher
MDPI
Related Researcher
Research Interests

CFD(Computational Fluid Dynamics),FSI(Fluid Structure Interaction),Marine Renewable Energy,전산유체역학,유체구조상호작용,해양신재생에너지

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