Heaving displacement amplification characteristics of a power buoy in shoaling water with insufficient draft SCIE SCOPUS KCI

Cited 3 time in WEB OF SCIENCE Cited 3 time in Scopus
Title
Heaving displacement amplification characteristics of a power buoy in shoaling water with insufficient draft
Author(s)
Kweon, Hyuck-Min; Cho, Il-Hyoung; Cho, Hong-Yeon
KIOST Author(s)
Cho, Hong Yeon(조홍연)
Publication Year
2013-12
Abstract
The resonance power buoy is a convincing tool that can increase the extraction efficiency of wave energy. The buoy needs a corresponding draft, to move in resonance with waves within the peak frequency band where wave energy is concentrated. However, it must still be clarified if the buoy acts as an effective displacement amplifier, when there is insufficient water depth. In this study, the vertical displacement of a circular cylinder-type buoy was calculated, with the spectrum data observed in a real shallow sea as the external wave force, and with the corresponding draft according to the mode frequency of normal waves. Such numerical investigation result, without considering Power Take-Off (PTO) damping, confirmed that the area of the heave responses spectrum can be amplified by up to about tenfold, compared with the wave energy spectrum, if the draft corresponds to the peak frequency, even with insufficient water depth. Moreover, the amplification factor of the buoy varied, according to the seasonal changes in the wave spectra.
ISSN
2092-6782
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3048
DOI
10.2478/IJNAOE-2013-0157
Bibliographic Citation
INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING, v.5, no.4, pp.614 - 624, 2013
Publisher
SOC NAVAL ARCHITECTS KOREA
Keywords
Resonance power buoy; Energy extraction efficiency; Draft depth; Mode frequency; PTO
Type
Article
Language
English
Document Type
Article
Publisher
SOC NAVAL ARCHITECTS KOREA
Related Researcher
Research Interests

coastal numerical modeling,statistical modeling,uncertainty analysis,연안수치모델링,해양통계모델링,불확실성 분석

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