The performance of the Mocean M100 wave energy converter described through numerical and physical modelling
Mocean Energy has designed a 100-kW hinged-raft wave energy converter (WEC), the M100, which has a novel geometry that reduces the cost of energy by improving the ratios of power per size and power per torque. The performance of the M100 is shown through the outputs of frequency-domain and time-doma...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
European Wave and Tidal Energy Conference
2020-05-01
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| Series: | International Marine Energy Journal |
| Subjects: | |
| Online Access: | http://marineenergyjournal.org/imej/article/view/44 |
| _version_ | 1818903145244262400 |
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| author | J. Cameron McNatt Christopher H. Retzler |
| author_facet | J. Cameron McNatt Christopher H. Retzler |
| author_sort | J. Cameron McNatt |
| collection | DOAJ |
| description | Mocean Energy has designed a 100-kW hinged-raft wave energy converter (WEC), the M100, which has a novel geometry that reduces the cost of energy by improving the ratios of power per size and power per torque. The performance of the M100 is shown through the outputs of frequency-domain and time-domain numerical models, which are compared with those from 1/20th scale wave-tank testing. Results show that for the undamped, frequency-domain model, there are resonant peaks in the response at 6.6 and 9.6 s, corresponding to wavelengths that are 1.9 and 3.7 times longer than the machine. With the inclusion of power-take-off and viscous damping, the power response as a function of frequency shows a broad bandwidth and a hinge flex amplitude of 12-20 degrees per meter of wave amplitude. Comparison between the time-domain model and physical data in a variety of sea states, up to a significant wave height of 4.5 m, show agreements within 10% for average power absorption, which is notable because only simple, nonlinear, numerical models were used. The M100 geometry results in a broad-banded, large amplitude response due to its asymmetric shape, which induces coupling between modes of motion. |
| first_indexed | 2024-12-19T20:46:53Z |
| format | Article |
| id | doaj.art-2fdab7dd1d334f75b8ec253aee9c3f86 |
| institution | Directory Open Access Journal |
| issn | 2631-5548 |
| language | English |
| last_indexed | 2024-12-19T20:46:53Z |
| publishDate | 2020-05-01 |
| publisher | European Wave and Tidal Energy Conference |
| record_format | Article |
| series | International Marine Energy Journal |
| spelling | doaj.art-2fdab7dd1d334f75b8ec253aee9c3f862022-12-21T20:06:12ZengEuropean Wave and Tidal Energy ConferenceInternational Marine Energy Journal2631-55482020-05-013110.36688/imej.3.11-19The performance of the Mocean M100 wave energy converter described through numerical and physical modellingJ. Cameron McNattChristopher H. RetzlerMocean Energy has designed a 100-kW hinged-raft wave energy converter (WEC), the M100, which has a novel geometry that reduces the cost of energy by improving the ratios of power per size and power per torque. The performance of the M100 is shown through the outputs of frequency-domain and time-domain numerical models, which are compared with those from 1/20th scale wave-tank testing. Results show that for the undamped, frequency-domain model, there are resonant peaks in the response at 6.6 and 9.6 s, corresponding to wavelengths that are 1.9 and 3.7 times longer than the machine. With the inclusion of power-take-off and viscous damping, the power response as a function of frequency shows a broad bandwidth and a hinge flex amplitude of 12-20 degrees per meter of wave amplitude. Comparison between the time-domain model and physical data in a variety of sea states, up to a significant wave height of 4.5 m, show agreements within 10% for average power absorption, which is notable because only simple, nonlinear, numerical models were used. The M100 geometry results in a broad-banded, large amplitude response due to its asymmetric shape, which induces coupling between modes of motion.http://marineenergyjournal.org/imej/article/view/44wave energy converternumerical modellingtank testingresonance |
| spellingShingle | J. Cameron McNatt Christopher H. Retzler The performance of the Mocean M100 wave energy converter described through numerical and physical modelling International Marine Energy Journal wave energy converter numerical modelling tank testing resonance |
| title | The performance of the Mocean M100 wave energy converter described through numerical and physical modelling |
| title_full | The performance of the Mocean M100 wave energy converter described through numerical and physical modelling |
| title_fullStr | The performance of the Mocean M100 wave energy converter described through numerical and physical modelling |
| title_full_unstemmed | The performance of the Mocean M100 wave energy converter described through numerical and physical modelling |
| title_short | The performance of the Mocean M100 wave energy converter described through numerical and physical modelling |
| title_sort | performance of the mocean m100 wave energy converter described through numerical and physical modelling |
| topic | wave energy converter numerical modelling tank testing resonance |
| url | http://marineenergyjournal.org/imej/article/view/44 |
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