On the S-shaped floaters for a Wavestar-like wave energy converter with an I-shaped mechanical power take-off
A numerical wave energy converter (WEC) similar to the Wavestar WEC with eight units, each comprising an I-shaped power take-off (PTO), was studied with the cylindrical-hemispherical (C-HS) and S-shaped floaters. Efforts were made to examine the effects of the floater-geometry change on the PTO powe...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Energy Conversion and Management: X |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590174523000430 |
| _version_ | 1797802118134890496 |
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| author | Ammar Ahmed Ali Azam Yanen Wang Xing Tan Minyi Yi Zutao Zhang |
| author_facet | Ammar Ahmed Ali Azam Yanen Wang Xing Tan Minyi Yi Zutao Zhang |
| author_sort | Ammar Ahmed |
| collection | DOAJ |
| description | A numerical wave energy converter (WEC) similar to the Wavestar WEC with eight units, each comprising an I-shaped power take-off (PTO), was studied with the cylindrical-hemispherical (C-HS) and S-shaped floaters. Efforts were made to examine the effects of the floater-geometry change on the PTO power performance and to study the significance of replacing a C-HS with an S-shaped floater of the same size and resonance characteristics using a hybrid algorithm based on ANSYS AQWA and MATLAB Simscape. The pure floater-shape-change effects on their heave responses were evaluated through the time-domain simulations in ANSYS AQWA and imported into a MATLAB-Simscape-based algorithm of the PTO to investigate the performance of the PTO and the overall WEC model under those effects. The buoys on the model scale were tested in a lab-scale facility, followed by a CFD analysis to study how the surrounding fluid interacts with the C-HS and the S-shaped floaters. The spectral modeling showed that the S-shaped floater could achieve a 5.5% greater RMS heave response than the C-HS in irregular waves. Replacing a C-HS with an S-shaped floater, the maximum increase in the PTO force was recorded to be 14%. A PTO integrated into an S-shaped floater attained 26% greater input power than one integrated into a C-HS floater. At an energy conversion efficiency of 55%, the PTO output power with an S-shaped floater tends to be 25–26% greater than with a C-HS floater. Replacing a C-HS with an S-shaped floater in the Wavestar-like WEC could be an optimal choice. |
| first_indexed | 2024-03-13T05:00:51Z |
| format | Article |
| id | doaj.art-8d9045d7f7e4448589de079be5da4b63 |
| institution | Directory Open Access Journal |
| issn | 2590-1745 |
| language | English |
| last_indexed | 2024-03-13T05:00:51Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Conversion and Management: X |
| spelling | doaj.art-8d9045d7f7e4448589de079be5da4b632023-06-17T05:20:55ZengElsevierEnergy Conversion and Management: X2590-17452023-07-0119100387On the S-shaped floaters for a Wavestar-like wave energy converter with an I-shaped mechanical power take-offAmmar Ahmed0Ali Azam1Yanen Wang2Xing Tan3Minyi Yi4Zutao Zhang5Department of Industry Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, ChinaDepartment of Industry Engineering, Northwestern Polytechnical University, Xi’an 710072, China; Corresponding author.School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, ChinaSchool of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, ChinaSchool of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, ChinaA numerical wave energy converter (WEC) similar to the Wavestar WEC with eight units, each comprising an I-shaped power take-off (PTO), was studied with the cylindrical-hemispherical (C-HS) and S-shaped floaters. Efforts were made to examine the effects of the floater-geometry change on the PTO power performance and to study the significance of replacing a C-HS with an S-shaped floater of the same size and resonance characteristics using a hybrid algorithm based on ANSYS AQWA and MATLAB Simscape. The pure floater-shape-change effects on their heave responses were evaluated through the time-domain simulations in ANSYS AQWA and imported into a MATLAB-Simscape-based algorithm of the PTO to investigate the performance of the PTO and the overall WEC model under those effects. The buoys on the model scale were tested in a lab-scale facility, followed by a CFD analysis to study how the surrounding fluid interacts with the C-HS and the S-shaped floaters. The spectral modeling showed that the S-shaped floater could achieve a 5.5% greater RMS heave response than the C-HS in irregular waves. Replacing a C-HS with an S-shaped floater, the maximum increase in the PTO force was recorded to be 14%. A PTO integrated into an S-shaped floater attained 26% greater input power than one integrated into a C-HS floater. At an energy conversion efficiency of 55%, the PTO output power with an S-shaped floater tends to be 25–26% greater than with a C-HS floater. Replacing a C-HS with an S-shaped floater in the Wavestar-like WEC could be an optimal choice.http://www.sciencedirect.com/science/article/pii/S2590174523000430Wave energy converterFloater geometryS-shaped floaterI-shaped PTOSustainable development goals |
| spellingShingle | Ammar Ahmed Ali Azam Yanen Wang Xing Tan Minyi Yi Zutao Zhang On the S-shaped floaters for a Wavestar-like wave energy converter with an I-shaped mechanical power take-off Energy Conversion and Management: X Wave energy converter Floater geometry S-shaped floater I-shaped PTO Sustainable development goals |
| title | On the S-shaped floaters for a Wavestar-like wave energy converter with an I-shaped mechanical power take-off |
| title_full | On the S-shaped floaters for a Wavestar-like wave energy converter with an I-shaped mechanical power take-off |
| title_fullStr | On the S-shaped floaters for a Wavestar-like wave energy converter with an I-shaped mechanical power take-off |
| title_full_unstemmed | On the S-shaped floaters for a Wavestar-like wave energy converter with an I-shaped mechanical power take-off |
| title_short | On the S-shaped floaters for a Wavestar-like wave energy converter with an I-shaped mechanical power take-off |
| title_sort | on the s shaped floaters for a wavestar like wave energy converter with an i shaped mechanical power take off |
| topic | Wave energy converter Floater geometry S-shaped floater I-shaped PTO Sustainable development goals |
| url | http://www.sciencedirect.com/science/article/pii/S2590174523000430 |
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