NDLI: Design and Simulation of a Novel Mechanical Power Take-Off for a Two-Body Wave Energy Point Absorber

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Design and Simulation of a Novel Mechanical Power Take-Off for a Two-Body Wave Energy Point Absorber

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Design and Simulation of a Novel Mechanical Power Take-Off for a Two-Body Wave Energy Point Absorber

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Li, Xiaofan Chen, Chien-An Xiong, Qiuchi Parker, Robert Zuo, Lei
Copyright Year	2018
Abstract	In this paper, a two-body self-react wave energy converter with a novel mechanical Power Take-off (PTO) is introduced. The PTO rectifies the mechanical motion and regulates the flow with a mechanism called Mechanical Motion Rectifier (MMR), which converts the reciprocating motion of the ocean wave into unidirectional rotation of the generator. The overall system is analyzed in both time and frequency domain. In time domain, the piecewise non-linear dynamic model of the MMR PTO is derived, and parameters that could significantly influence the MMR property is extracted. By building the model into WEC-Sim, a time domain wave energy converter (WEC) simulation tool, to simulate and evaluate the performance of the PTO. In addition, the system is modelled as a two-body vibration system for frequency domain analysis in order to further investigate and optimize the proposed wave energy converter. The tunable parameters within the system, including the equivalent mass, the equivalent damping coefficient, and the PTO stiffness, are discussed based on the criteria of maximization of the total output power. To verify the theoretical analysis, a bench test prototype is developed and tested on a hydraulic test machine. The experimental results in line with the derived model and can be used for reasonable estimation on the output power of the proposed system in real ocean conditions.
Sponsorship	Design Engineering Division Computers and Information in Engineering Division
File Format	PDF
ISBN	9780791851852
DOI	10.1115/DETC2018-85873
Volume Number	Volume 8: 30th Conference on Mechanical Vibration and Noise
Conference Proceedings	ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Language	English
Publisher Date	2018-08-26
Publisher Place	Quebec City, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Damping Wave energy Frequency-domain analysis Oceans Generators Theoretical analysis Flow (dynamics) Machinery Rotation Wave energy converters Design Vibration equipment Simulation Ocean waves Dynamic models Stiffness Reciprocating motion Engineering prototypes
Content Type	Text
Resource Type	Article

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