StingRAY Structural Optimization Final Technical Report Appendices

Description

The protected data appendices to the public Final Technical Report. 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

Resources

Name Format Description Link
33 The purpose of this document is to describe the bathymetry and bottom conditions at the U.S. Navy Wave Energy Test Site (WETS) at Kaneohe Bay, Hawaii, along with the metocean conditions that the WEC may be expected to be exposed to while deployed there. https://mhkdr.openei.org/files/352/DE-EE0006610%20M2.1.2%20Metocean%20Report%20S1-DB-01%20v4.1%20PD%2006-05-2015.pdf
33 This document records the work performed for the structural and ballast system design of a wave energy converter (WEC) prototype for Columbia Power (CPower). The design was developed to satisfy the CPower requirements elaborated in the System Engineering Design Requirements. https://mhkdr.openei.org/files/352/DE-EE0006610%20M2.2.2%2018024%20CPT%20WEC%20Design%20Documentation%20Rev-A%20PD%2010-31-2018.pdf
33 Structural design drawings for the StingRAY WEC Hull. https://mhkdr.openei.org/files/352/DE-EE0006610%20M2.2.3%2018024-100-01%20WEC%20Structure%20Rev-B%20PD%2004-26-2019.pdf
33 Drawing package detailing coupon panels and sectioned lap shear joint specimens. https://mhkdr.openei.org/files/352/DE-EE0006610%20M3.5.2%2018024-100-20%20WEC%20Design%20Alternative%20Composites%20Test%20Program%20Rev.B%20PD%2010-31-2018.pdf
33 Composite laminate properties are heavily dependent on the constituent materials and the processes used to combine them. The following study is undertaken to develop a conceptual laminate and adhesive joint for use as comparison against the steel base design. https://mhkdr.openei.org/files/352/DE-EE0006610%20M4.1%2018024.01-200-01%20Test%20Article%20Design%20Technical%20Memo%20Rev.A%20PD%2010-31-2018%20.pdf
33 This test report describes the setup and testing of the CPower composite coupons and double lap shear (DLS) specimens. Description of the methods used to fabricate the DLS specimens is also provided. Representative ASTM standards were used as guidance documents for each of the specific tests. https://mhkdr.openei.org/files/352/DE-EE0006610%20M5.3%20Coupon%20and%20DLS%20Specimen%20Test%20Report%20revA%20UD%2009-16-2019.pdf
33 The objective of this document is to present the design validation and optimization enabled by Project structural testing. Please note that the test report is a separate document in which the test methodology and results are detailed; the present document covers work utilizing the test results to enable engineering analysis. The structural testing was composed of two phases: coupon testing, and full-scale sectioned joint testing. https://mhkdr.openei.org/files/352/DE-EE0006610%20M5.5%20Optimization%20Assessment%20Memo%20PD%20v1.1%2010-31-2019.pdf
33 The purpose of this document is to outline plans for integrating Project improvements into CPower's WEC technology. https://mhkdr.openei.org/files/352/DE-EE0006610%20M6.1a%20System%20Integration%20Plan%20PD%20v1.0%2011-26-2019.pdf
33 This Memo summarizes the impacts to Columbia Power Technologies, Inc., (CPower) System Performance Assessment (SPA) metrics and Levelized Cost of Energy (LCOE) for the StingRAY wave energy converter (WEC). https://mhkdr.openei.org/files/352/DE-EE0006610%20M6.1b%20SPA%20and%20LCOE%20Impact%20Assessment%20PD%20v1.0%2011-05-2019.pdf
33 This document describes the methodology utilized to obtain estimates of performance for StingRAY at specific project stages. https://mhkdr.openei.org/files/352/DE-EE0006610%20M6.1b.3%20Energy%20Production%20Assessment%20for%20DOE%20LCOE%20and%20SPA%20Reporting%20v1.0%20%20PD%2010-14-2019.pdf
33 Theoretical Annual Energy Production (TAEP) at various stages of power conversion chain are given for Baseline and Final WECs. https://mhkdr.openei.org/files/352/DE-EE0006610%20M6.1b.4%20Baseline%20and%20Final%20TAEP%20Calculations%20v1.0%20PD%2010-14-2019.pdf
33 The purpose of this document is to summarize the H2 hull and concept hybrid pontoon design activities. https://mhkdr.openei.org/files/352/DE-EE0006610%20M6.1c%20Summary%20of%20Component%20Design%20Report%20PD%20v1.0%2011-26-2019.pdf
21 This links to MHKDR Submission 351, which includes the Structural Optimization Final Technical Report for the StingRAY WEC. https://mhkdr.openei.org/submissions/351
33 A detailed assessment of WEC loading is critical for the requisite structural analysis. A number of design load cases (DLC) were established. All relevant loads were considered in the calculations, and both ultimate and fatigue limit states were considered. The calculation of design loads was performed using fully-coupled time-domain numerical simulation that accounts for all load contributions simultaneously and for all relevant nonlinearities. https://mhkdr.openei.org/files/352/DE-EE0006610%20M2.1%20Design%20Load%20Cases%20for%20Structural%20Optimization%20v2.0%20PD%2007-15-2016.pdf
33 The purpose of this document is to describe the loads provided by CPwr to Glosten for the purpose of designing the prototype StingRay WEC (see “Final Technical Report - Public” for more details). https://mhkdr.openei.org/files/352/DE-EE0006610%20M2.2.1%20StingRAY%20Design%20Loads%20v2.1%20PD%2003-19-2018.pdf
33 Coupon testing is necessary for the composite pontoon to obtain precise design values for the fabricator’s materials and processes. Standard practice in the marine industry is to collect design data this way for each material and process used in manufacture. This document details the rationale for the coupon test selection and the matrix of tests required for deriving laminate characteristic strengths. https://mhkdr.openei.org/files/352/DE-EE0006610%20M3.5.1%2018024.01-200-02%20Composite%20Test%20Program%20Memo%20Rev.A%20PD%2010-31-2018.pdf

Tags

  • hydrokinetic
  • structure
  • mhk
  • hull
  • lcoe
  • marine
  • renewable-energy
  • hybrid-materials
  • frp
  • offshore
  • wave-energy-converter
  • fiber-reinforced-plastic

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