Assessment of the OTEC cold water pipe design under bending loading: A benchmarking and parametric study using finite element approach
Ocean thermal energy conversion (OTEC) is a floating platform that generates electricity from seawater heat. The cold water pipe (CWP) used in OTEC has a length of 1,000 m and a diameter of 10 m, making it susceptible to bending loads from ocean currents. To find suitable geometry and material for t...
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-08-01
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| Series: | Journal of the Mechanical Behavior of Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/jmbm-2022-0298 |
| _version_ | 1797688833861484544 |
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| author | Adie Prayoga Wira Adiputra Ristiyanto Prabowo Aditya Rio Erwandi Erwandi Muttaqie Teguh Muhayat Nurul Huda Nurul |
| author_facet | Adie Prayoga Wira Adiputra Ristiyanto Prabowo Aditya Rio Erwandi Erwandi Muttaqie Teguh Muhayat Nurul Huda Nurul |
| author_sort | Adie Prayoga Wira |
| collection | DOAJ |
| description | Ocean thermal energy conversion (OTEC) is a floating platform that generates electricity from seawater heat. The cold water pipe (CWP) used in OTEC has a length of 1,000 m and a diameter of 10 m, making it susceptible to bending loads from ocean currents. To find suitable geometry and material for the CWP, the finite element method was used to model the real-world geometry. In the D/t variation, lower ratios (increased thickness) result in higher critical moments, maximum stress, strain, and displacement. D/t 50 was chosen for the CWP. In the L/D variation, the critical moment’s impact on L/D ratio was minimal, while reducing L/D (shorter pipe) increased strain, and larger L/D geometries had higher displacements. L/D 10 was selected as it balanced critical moments and reduced the number of stiffeners needed. For diameter size variation, larger diameters increased critical moment and strain, but smaller diameters (larger L/D ratios) also showed high strain due to necking at two points. A diameter of 12 m was chosen for its exceptionally high critical moment. Steel was selected as the suitable material due to its higher critical moment and maximum stress, despite its higher weight and lower maximum strain than composites. Capital shape imperfections had a minimal effect on the CWP’s structure as they were localized. |
| first_indexed | 2024-03-12T01:36:23Z |
| format | Article |
| id | doaj.art-8f7fdbac68b94ae99bd605f46e7acfc3 |
| institution | Directory Open Access Journal |
| issn | 2191-0243 |
| language | English |
| last_indexed | 2024-03-12T01:36:23Z |
| publishDate | 2023-08-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Journal of the Mechanical Behavior of Materials |
| spelling | doaj.art-8f7fdbac68b94ae99bd605f46e7acfc32023-09-11T06:59:59ZengDe GruyterJournal of the Mechanical Behavior of Materials2191-02432023-08-01321106005910.1515/jmbm-2022-0298Assessment of the OTEC cold water pipe design under bending loading: A benchmarking and parametric study using finite element approachAdie Prayoga Wira0Adiputra Ristiyanto1Prabowo Aditya Rio2Erwandi Erwandi3Muttaqie Teguh4Muhayat Nurul5Huda Nurul6Department of Mechanical Engineering, Universitas Sebelas Maret, Surakarta, 57126, IndonesiaResearch Center for Hydrodynamics Technology, National Research and Innovation Agency (BRIN), Surabaya60112, IndonesiaDepartment of Mechanical Engineering, Universitas Sebelas Maret, Surakarta, 57126, IndonesiaResearch Center for Hydrodynamics Technology, National Research and Innovation Agency (BRIN), Surabaya60112, IndonesiaResearch Center for Hydrodynamics Technology, National Research and Innovation Agency (BRIN), Surabaya60112, IndonesiaDepartment of Mechanical Engineering, Universitas Sebelas Maret, Surakarta, 57126, IndonesiaNational Institute for Aquatic Resources, Technical University of Denmark, Lyngby2800, DenmarkOcean thermal energy conversion (OTEC) is a floating platform that generates electricity from seawater heat. The cold water pipe (CWP) used in OTEC has a length of 1,000 m and a diameter of 10 m, making it susceptible to bending loads from ocean currents. To find suitable geometry and material for the CWP, the finite element method was used to model the real-world geometry. In the D/t variation, lower ratios (increased thickness) result in higher critical moments, maximum stress, strain, and displacement. D/t 50 was chosen for the CWP. In the L/D variation, the critical moment’s impact on L/D ratio was minimal, while reducing L/D (shorter pipe) increased strain, and larger L/D geometries had higher displacements. L/D 10 was selected as it balanced critical moments and reduced the number of stiffeners needed. For diameter size variation, larger diameters increased critical moment and strain, but smaller diameters (larger L/D ratios) also showed high strain due to necking at two points. A diameter of 12 m was chosen for its exceptionally high critical moment. Steel was selected as the suitable material due to its higher critical moment and maximum stress, despite its higher weight and lower maximum strain than composites. Capital shape imperfections had a minimal effect on the CWP’s structure as they were localized.https://doi.org/10.1515/jmbm-2022-0298cwp otecbuckling propagationmaterial selectionbending loadfinite element method |
| spellingShingle | Adie Prayoga Wira Adiputra Ristiyanto Prabowo Aditya Rio Erwandi Erwandi Muttaqie Teguh Muhayat Nurul Huda Nurul Assessment of the OTEC cold water pipe design under bending loading: A benchmarking and parametric study using finite element approach Journal of the Mechanical Behavior of Materials cwp otec buckling propagation material selection bending load finite element method |
| title | Assessment of the OTEC cold water pipe design under bending loading: A benchmarking and parametric study using finite element approach |
| title_full | Assessment of the OTEC cold water pipe design under bending loading: A benchmarking and parametric study using finite element approach |
| title_fullStr | Assessment of the OTEC cold water pipe design under bending loading: A benchmarking and parametric study using finite element approach |
| title_full_unstemmed | Assessment of the OTEC cold water pipe design under bending loading: A benchmarking and parametric study using finite element approach |
| title_short | Assessment of the OTEC cold water pipe design under bending loading: A benchmarking and parametric study using finite element approach |
| title_sort | assessment of the otec cold water pipe design under bending loading a benchmarking and parametric study using finite element approach |
| topic | cwp otec buckling propagation material selection bending load finite element method |
| url | https://doi.org/10.1515/jmbm-2022-0298 |
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