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Effects of mooring configurations on the hydrodynamic performance of a floating offshore oscillating water column wave energy converter
Citation
Gubesch, EM and Abdussamie, N and Penesis, I and Chin, C, Effects of mooring configurations on the hydrodynamic performance of a floating offshore oscillating water column wave energy converter, Renewable & Sustainable Energy Reviews, 166 Article 112643. ISSN 1364-0321 (2022) [Refereed Article]
Copyright Statement
© 2022 Elsevier Ltd. All rights reserved.
DOI: doi:10.1016/j.rser.2022.112643
Abstract
This paper presents the results of a systematic experimental investigation into the effects of different mooring configurations on the hydrodynamic performance of a 1:36 scaled Oscillating Water Column (OWC) Wave Energy Converter (WEC) model. The OWC WEC was tested in the fixed, free-floating and moored conditions with three different mooring configurations namely a tension leg, a taut mooring with 45O tendons, and a catenary mooring with heavy chains. Detailed analysis included hydrodynamic capture width ratios (CWR), fluid interactions between the OWC chamber and the incident waves, response amplitude operators (RAO), mooring tensions, and turbine damping coefficients. The rigid-body motions of the device had adversely affected the WEC's performance with a substantial decrease in the hydrodynamic CWR occurring between the fixed condition and the floating-moored conditions. The RAOs of surge and pitch were found to be inversely proportional to the CWRs, however, heave motions contributed to power absorption for the taut moorings. Of the floating-moored conditions, the 45O taut mooring was the best performing, followed by the vertical taut and catenary mooring. Both taut-moored conditions exhibited significantly higher mooring tensions than the catenary moored condition. The maximum mooring tensions for the taut-moored conditions correlated with increased CWRs, whereas the maximum tension in the catenary was induced by the maximum heave and pitch RAOs.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | offshore renewable energy, wave energy, oscillating water column, hydrodynamic performance, motion response, mooring configuration |
| Research Division: | Engineering |
| Research Group: | Maritime engineering |
| Research Field: | Ocean engineering |
| Objective Division: | Energy |
| Objective Group: | Renewable energy |
| Objective Field: | Wave energy |
| UTAS Author: | Gubesch, EM (Dr Eric Gubesch) |
| UTAS Author: | Abdussamie, N (Dr Nagi Abdussamie) |
| UTAS Author: | Penesis, I (Professor Irene Penesis) |
| UTAS Author: | Chin, C (Dr Chris Chin) |
| ID Code: | 150725 |
| Year Published: | 2022 |
| Web of Science® Times Cited: | 2 |
| Deposited By: | NC Maritime Engineering and Hydrodynamics |
| Deposited On: | 2022-06-26 |
| Last Modified: | 2022-09-06 |
| Downloads: | 0 |
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