Title: Nonlinear hydrostatic control of a wave energy converter

Abstract

Increased energy harvesting is realized using a nonlinear buoy geometry for reactive power generation. By exploiting the nonlinear dynamic coupling between the buoy geometry and the potential wideband frequency spectrum of incoming waves in the controller/buoy design, increased power can be captured in comparison to conventional wave energy converter designs. In particular, the reactive power and energy storage system requirements are inherently embedded in the nonlinear buoy geometry, therefore requiring only simple rate-feedback control.

Inventors:

Wilson, David G.; Bacelli, Giorgio; Coe, Ryan Geoffrey; Robinett, III, Rush D.; Abdelkhalik, Ossama

Issue Date:

2022-05-10

Research Org.:

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Michigan Technological Univ., Houghton, MI (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1892919

Patent Number(s):

11326574

Application Number:

16/792,749

Assignee:

National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM); Michigan Technological University (Houghton, MI)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B63 - SHIPS OR OTHER WATERBORNE VESSELS B63B - SHIPS OR OTHER WATERBORNE VESSELS

F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03B - MACHINES OR ENGINES FOR LIQUIDS

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B - PERFORMING OPERATIONS B63 - SHIPS OR OTHER WATERBORNE VESSELS B63B - SHIPS OR OTHER WATERBORNE VESSELS

B63B2035/4466 - {for converting water energy into electric energy, e.g. from tidal flows, waves or currents}
B63B22/00 - Buoys
B63B22/04 - {Fixations or other} anchoring arrangements

F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03B - MACHINES OR ENGINES FOR LIQUIDS

F03B13/1885 - {and the wom is tied to the rem}

F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05B - INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY

F05B2250/20 - three-dimensional
F05B2250/232 - conical
F05B2250/33 - symmetrical

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E10/30 - Energy from the sea

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DOE Contract Number:  

NA0003525

Resource Type:

Patent

Resource Relation:

Patent File Date: 02/17/2020

Country of Publication:

United States

Language:

English