Towards Reliability-Based Geometry Optimization of a Point-Absorber with PTO Reliability Objectives

Caitlyn E. Clark, Anna Garcia Teruel, Bryony DuPont, David I. M. Forehand

Research output: Contribution to conferencePaperpeer-review

Abstract

In this study, we seek to understand the relationship between wave energy converter (WEC) hull geometries and power take-off (PTO) reliability. To do this, we calculate the damage equivalent loads (DELs) for a PTO given three hull shapes (a cylinder, a sphere, and a barge), two sets of metocean conditions (from the center of the North Sea and off the west coast of Norway), and two float motions (heave and surge). Results indicate that hull geometry has a primary influence on DELs experienced by the PTO, and also that certain geometries result in larger variations in DELs based on whether the device is moving in heave or surge motion. These findings underline the importance of considering WEC hull geometry in early design processes to optimize cost, power production, and reliability. More importantly, this research emphasizes the need to consider the relationship between the WEC geometry and the PTO reliability early in the design process. By considering this relationship, more optimal WECs can be designed for power production and system reliability. The methods tested in this study will enable the future reliability-based geometry optimization of WEC hulls to maximize reliability and power production.
Original languageEnglish
Number of pages10
Publication statusPublished - Sep 2019
Event13th European Wave and Tidal Energy Conference - Naples, Italy
Duration: 1 Sep 20196 Sep 2019
https://ewtec.org/conferences/ewtec-2019/

Conference

Conference13th European Wave and Tidal Energy Conference
Abbreviated titleEWTEC 2019
Country/TerritoryItaly
CityNaples
Period1/09/196/09/19
Internet address

Keywords

  • reliability-based design
  • PTO
  • Wave Energy
  • Point absorber

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