Performance of Linear Generator Designs for Direct Drive Wave Energy Converter under Unidirectional Long-Crested Random Waves
For generating electricity, direct-drive wave energy converters (WECs) with linear permanent magnet generators (LPMGs) have advantages in terms of efficiency, simplicity, and force-to-weight ratio over WEC with rotary generators. However, the converter’s work under approaching-real wave conditions s...
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ftmdpi:oai:mdpi.com:/1996-1073/14/16/5098/ 2023-08-20T04:09:58+02:00 Performance of Linear Generator Designs for Direct Drive Wave Energy Converter under Unidirectional Long-Crested Random Waves Budi Azhari Fransisco Danang Wijaya Edwar Yazid 2021-08-18 application/pdf https://doi.org/10.3390/en14165098 EN eng Multidisciplinary Digital Publishing Institute A3: Wind, Wave and Tidal Energy https://dx.doi.org/10.3390/en14165098 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 14; Issue 16; Pages: 5098 iron-cored semi iron-cored LPMG significant wave height peak frequency random wave output power Text 2021 ftmdpi https://doi.org/10.3390/en14165098 2023-08-01T02:28:17Z For generating electricity, direct-drive wave energy converters (WECs) with linear permanent magnet generators (LPMGs) have advantages in terms of efficiency, simplicity, and force-to-weight ratio over WEC with rotary generators. However, the converter’s work under approaching-real wave conditions should be investigated. This paper studies the performance of a pico-scale WEC with two different LPMGs under unidirectional long-crested random waves. Different significant wave heights (using data in the Southern Ocean of Yogyakarta, Indonesia) and peak frequencies are tested. The JONSWAP energy spectrum is used to extract the wave elevations, while the MSS toolbox in MATLAB Simulink is employed to solve the floater’s dynamic responses. Next, the translator movements are extracted and combined with the flux distribution from FEMM simulation and analytical calculation, and the output powers are obtained. An experiment is conducted to test the output under constant speed. The results show for both designs, different tested significant wave height values produce higher output powers than peak frequency variation, but there is no specific trend on them. Meanwhile, the peak frequency is inversely proportional to the output power. Elimination of the non-facing events results in increasing output power under both parameters’ variation, with higher significant wave height resulting in a bigger increase. The semi iron-cored LPMG produces lower power loss and higher efficiency. Text Southern Ocean MDPI Open Access Publishing Southern Ocean Energies 14 16 5098 |
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Open Polar |
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MDPI Open Access Publishing |
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English |
topic |
iron-cored semi iron-cored LPMG significant wave height peak frequency random wave output power |
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iron-cored semi iron-cored LPMG significant wave height peak frequency random wave output power Budi Azhari Fransisco Danang Wijaya Edwar Yazid Performance of Linear Generator Designs for Direct Drive Wave Energy Converter under Unidirectional Long-Crested Random Waves |
topic_facet |
iron-cored semi iron-cored LPMG significant wave height peak frequency random wave output power |
description |
For generating electricity, direct-drive wave energy converters (WECs) with linear permanent magnet generators (LPMGs) have advantages in terms of efficiency, simplicity, and force-to-weight ratio over WEC with rotary generators. However, the converter’s work under approaching-real wave conditions should be investigated. This paper studies the performance of a pico-scale WEC with two different LPMGs under unidirectional long-crested random waves. Different significant wave heights (using data in the Southern Ocean of Yogyakarta, Indonesia) and peak frequencies are tested. The JONSWAP energy spectrum is used to extract the wave elevations, while the MSS toolbox in MATLAB Simulink is employed to solve the floater’s dynamic responses. Next, the translator movements are extracted and combined with the flux distribution from FEMM simulation and analytical calculation, and the output powers are obtained. An experiment is conducted to test the output under constant speed. The results show for both designs, different tested significant wave height values produce higher output powers than peak frequency variation, but there is no specific trend on them. Meanwhile, the peak frequency is inversely proportional to the output power. Elimination of the non-facing events results in increasing output power under both parameters’ variation, with higher significant wave height resulting in a bigger increase. The semi iron-cored LPMG produces lower power loss and higher efficiency. |
format |
Text |
author |
Budi Azhari Fransisco Danang Wijaya Edwar Yazid |
author_facet |
Budi Azhari Fransisco Danang Wijaya Edwar Yazid |
author_sort |
Budi Azhari |
title |
Performance of Linear Generator Designs for Direct Drive Wave Energy Converter under Unidirectional Long-Crested Random Waves |
title_short |
Performance of Linear Generator Designs for Direct Drive Wave Energy Converter under Unidirectional Long-Crested Random Waves |
title_full |
Performance of Linear Generator Designs for Direct Drive Wave Energy Converter under Unidirectional Long-Crested Random Waves |
title_fullStr |
Performance of Linear Generator Designs for Direct Drive Wave Energy Converter under Unidirectional Long-Crested Random Waves |
title_full_unstemmed |
Performance of Linear Generator Designs for Direct Drive Wave Energy Converter under Unidirectional Long-Crested Random Waves |
title_sort |
performance of linear generator designs for direct drive wave energy converter under unidirectional long-crested random waves |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/en14165098 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Energies; Volume 14; Issue 16; Pages: 5098 |
op_relation |
A3: Wind, Wave and Tidal Energy https://dx.doi.org/10.3390/en14165098 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en14165098 |
container_title |
Energies |
container_volume |
14 |
container_issue |
16 |
container_start_page |
5098 |
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1774723763340836864 |