StingRAY Structural Optimization Final Technical Report

Abstract

The overall project objective is to materially decrease the leveled cost of energy (LCOE) of the Columbia Power (CPower) StingRAY utility-scale wave energy converter (WEC). This will be achieved by reducing structural material and manufacturing costs and increasing energy output. In this Project, improving the overall Power-to-Weight ratio (PWR) is accomplished through lowering design margins?allowing for weight reduction and more efficient, cost-effective WEC manufacturing and assembly?and by optimizing mass-related WEC performance parameters, such as center of gravity and system inertia.

A mixed materials approach to further structural optimization was developed under this Project and validated with extensive laboratory structural testing. This approach substitutes fiber-reinforced plastic (FRP) for steel where appropriate. The benefits of steel are maintained where most useful, for instance at structural joints where the stiffness of steel is required, and the complex geometry is more readily fabricated with steel. However, there are structural spans whose simple shapes are readily fabricated with mandrel-wound FRP and where significant cost and weight savings can be found. An adhesive, double lap shear joint is used to join the FRP and steel subcomponents.

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Additional Info

DOE Project Name: WAVE ENERGY CONVERTER STRUCTURAL OPTIMIZATION THROUGH ENGINEERING AND EXPERIMENTAL ANALYSIS
DOE Project Number: EE0006610
DOE Project Lead: Yana Shininger
Last Updated: 7 months ago
Aug
2020
Data from August, 2020
Submitted Dec 6, 2020

Contact

Columbia Power Technologies, Inc.


541.368.5033

Status

Awaiting release License 
All Resources Available Dec 6, 2021

Authors

Pukha Lenee-Bluhm
Columbia Power Technologies Inc.

Keywords

MHK, Marine, Hydrokinetic, Renewable Energy, Wave Energy Converter, Offshore, Hybrid Materials, Structure, Hull, FRP, Fiber-reinforced plastic, LCOE

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