Influence of Time and Frequency Domain Wave Forcing on the Power Estimation of a Wave Energy Converter Array

Ticona Rollano, Fadia M.; Tran, Thanh Toan; Yu, Yi-Hsiang; Garcia Medina, Gabriel; Yang, Zhaoqing

doi:10.3390/jmse8030171

Influence of Time and Frequency Domain Wave Forcing on the Power Estimation of a Wave Energy Converter Array

Journal Article · Wed Mar 04 00:00:00 EST 2020 · Journal of Marine Science and Engineering

DOI:https://doi.org/10.3390/jmse8030171· OSTI ID:1616693

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Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States)

Industry-specific tools for analyzing and optimizing the design of wave energy converters (WECs) and associated power systems are essential to advancing marine renewable energy. This study aims to quantify the influence of phase information on the device power output of a virtual WEC array. We run the phase-resolving wave model FUNWAVE-TVD (Total Variation Diminishing) to generate directional waves at the PacWave South site offshore from Newport, Oregon, where future WECs are expected to be installed for testing. The two broad cases presented correspond to mean wave climates during warm months (March–August) and cold months (September–February). FUNWAVE-TVD time series of sea-surface elevation are then used in WEC-Sim, a time domain numerical model, to simulate the hydrodynamic response of each device in the array and estimate their power output. For comparison, WEC-Sim is also run with wave energy spectra calculated from the FUNWAVE-TVD simulations, which do not retain phase information, and with wave spectra computed using the phase-averaged model Simulating WAves Nearshore (SWAN). The use of spectral data in WEC-Sim requires a conversion from frequency to time domain by means of random superposition of wave components, which are not necessarily consistent because of the linear assumption implicit in this method. Thus, power response is characterized by multiple realizations of the wave climates.

View Accepted Manuscript (DOE)

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Water Power Technologies Office

Grant/Contract Number:: AC05-76RL01830; AC36-08GO28308

OSTI ID:: 1616693

Alternate ID(s):: OSTI ID: 1659961

Report Number(s):: PNNL-SA-150553; NREL/JA-5000-75983

Journal Information:: Journal of Marine Science and Engineering, Vol. 8, Issue 3; ISSN 2077-1312

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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