Characterization and verification of a two-body wave energy converter with a novel power take-off

Li, Xiaofan; Martin, Dillon; Liang, Changwei; Chen, ChienAn; Parker, Robert G.; Zuo, Lei

doi:10.1016/j.renene.2020.08.113

Characterization and verification of a two-body wave energy converter with a novel power take-off

Journal Article · Wed Aug 26 00:00:00 EDT 2020 · Renewable Energy

DOI:https://doi.org/10.1016/j.renene.2020.08.113· OSTI ID:1659128

Li, Xiaofan ^[1]; Martin, Dillon ^[2]; Liang, Changwei ^[2]; Chen, ChienAn ^[2]; Parker, Robert G. ^[3]; Zuo, Lei ^[2]

Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Virginia Tech
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Univ. of Utah, Salt Lake City, UT (United States)

The lack of high efficient, predictable and reliable power take-off (PTO) systems limits developments of ocean wave energy technology. In this paper, a two-body self-reacting wave energy converter (WEC) with a novel PTO is designed, modelled and implemented for efficiency enhancement. A novel mechanical motion rectifier (MMR) using a ball screw mechanism and an enclosed gear set is integrated to improve the energy harvesting efficiency and reliability by rectifying the oscillatory wave motion into unidirectional rotation of the generator. Detailed design and dynamic modelling for the proposed WEC are presented. A prototype of the PTO is tested in a dry lab to characterize and refine the dynamic modelling. The characterized PTO model is combined with the WEC model to create an overall system model. A water tank test is conducted to verify the overall system dynamics, which proves the accuracy of the model and shows the advantages of the proposed WEC on efficiency and predictability. Following the method of how the WEC system is characterized, performance prediction of the proposed WEC with MMR PTO can be achieved with high accuracy.

View Accepted Manuscript (DOE)

Research Organization:: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Water Power Technologies Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)

Grant/Contract Number:: EE0007174

OSTI ID:: 1659128

Alternate ID(s):: OSTI ID: 1660490

Journal Information:: Renewable Energy, Journal Name: Renewable Energy Vol. 163; ISSN 0960-1481

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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