Putra, Muhammad Rionaldi Dwi (2022) Studi Numerik Performa Turbin Angin Tipe Lenz 2 Pada Kondisi Aliran Dua Dimensi Dan Blade Statis Untuk Jumlah Blade 3, Blade Chord Length 180 mm Dan Diameter Turbin 400 mm. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kegiatan manusia sering dikaitkan dengan penggunaan listrik yang kian hari meningkat akibat peningkatan jumlah penduduk setiap tahunnya. Disatu sisi, keadaan sumber daya masih bergantung pada sumber daya tak terbarukan yang jumlahnya relatif terbatas. Berdasarkan Capaian Kinerja Sektor ESDM 2021 & Rencana 2022, penggunaan listrik di Indonesia pada 2021 mengalami peningkatan yang signifikan sebesar 0,034 MW dari 2020 dengan persentase sumber energi listrik sebesar 86,46 persen untuk energi tak terbarukan dan diperkirakan akan habis untuk sumber minyak bumi dalam sembilan tahun lagi, gas bumi akan habis 22 tahun kedepan, dan batubara akan habis 65 tahun mendatang. Problematika tersebut berdampak pada kompleksnya kelangkaan energi. Maka dari itu, diperlukan sumber energi alternatif dengan pemanfaatan energi baru terbarukan (EBT). Berdasarkan Badan Pengkajian dan Penerapan Teknologi (BPPT) 2021, total potensi energi terbarukan Indonesia mencapai 421.384 MW, salah satunya adalah tenaga angin dengan potensinya sebesar 60.647 MW. Dengan demikian, Indonesia dapat memanfaatkan sumber tenaga angin melalui inovasi turbin angin. Salah satu tipe yang tepat yakni turbin angin vertikal tipe Lenz 2, mengingat kondisi angin di Indonesia memiliki kecepatan berkisar 3 – 6 m/s, maka tergolong sesuai digunakan di kecepatan angin yang rendah. Selain itu desain turbin termasuk praktis sehingga memuat biaya yang tidak terlalu tinggi serta perawatannya yang mudah. Penelitian ini menggunakan metode analisa numerik dua dimensi dengan software ANSYS Fluent 19.2. Tahapan yang digunakan yakni pre-processing, processing, dan post processing. Penelitian ini dilakukan dengan menggunakan model turbulensi standard k-ε dengan static domain. Boundary condition yang digunakan untuk inlet adalah velocity inlet, outlet menggunakan pressure outlet, sym menggunakan symmetry dan blades turbin adalah wall. Penelitian ini didapatkan hasil berupa perubahan variasi kecepatan angin yang semakin besar terbukti dapat meningkatkan nilai gaya drag dan gaya lift serta torsi statis dari turbin angin tipe Lenz 2 dengan nilai tertinggi pada kecepatan angin sebesar 6 m/s, dimana nilai torsi statis tertinggi sebesar 1,262 Nm. Adapun hasil nilai koefisien torsi statis hasil simulasi akan memiliki trend yang relatif serupa dengan koefisien torsi statis hasil eksperimen, namun nilai untuk hasil simulasi akan lebih besar jika dibandingkan dengan hasil eksperimen.
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Human activities are often associated with the use of electricity, which is increasing day by day due to the increase in population every year. On the one hand, the state of resources is still dependent on non-renewable resources, which are relatively limited in number. Based on the Performance Achievement of the ESDM Sector 2021 and the 2022 Plan, the use of electricity in Indonesia in 2021 will experience a significant increase of 0.034 MW from 2020 with a
percentage of electrical energy sources of 86.46 percent for non-renewable energy, and it's estimated to be used up for petroleum sources in nine years, natural gas will run out in 22 years, and coal will run out in 65 years. These problems have an impact on the complexity of energy scarcity. Therefore, alternative energy sources are needed with the use of new renewable energy (EBT). Based on the Agency for the Assessment and Application of Technology (BPPT) 2021, Indonesia's total renewable energy potential reaches 421,384 MW, one of them is wind power with a potential of 60,647 MW. Thus, Indonesia can take advantage of the wind power source with the innovation of wind turbine drive. One of the right types is the Lenz 2 type vertical wind turbine, considering the wind conditions in Indonesia, which have speeds ranging from 3 to 6 m/s, it is classified as suitable for use at low wind speeds. In addition, the turbine design is practical so that the costs are not too high and the maintenance is easy. This study uses a two dimensional numerical analysis method with ANSYS Fluent 19.2 software. The stages used are pre-processing, processing, and post-processing. This research was conducted using the standard k-ε turbulence model with a static domain. The boundary conditions used for inlet are velocity inlet, outlet using pressure outlet, sym using symmetry, and turbine blades using wall. This study obtained results in the form of changes in wind speed that are increasingly proven to increase the value of the drag force and lift force as well as static torque from the Lenz 2 type wind turbine, with the highest value at wind speed of 6 m/s, where the highest static torque value is 1.262 Nm. The results of the coefficient of static torque simulation results will have a relatively similar trend to the coefficient of static torque experimental results, but the
value for the simulation results will be greater when compared to the experimental results.low conventional turbines due to the addition of a cylinder in front of the returning blade which is too close so that the shear layer does not fall on the turbine dan airflow from the front is deflected to the convex side advancing.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSM 621.406 Put s-1 2022 |
| Uncontrolled Keywords: | Gaya Drag & Lift, Kecepatan Angin, Koefisien Torsi Statis, Sudut Putar Turbin, Turbin Angin Lenz 2, Drag & Lift Force, Lenz 2 Wind Turbine, Static Torque Coefficient, Turbine Turning Angle, Wind Velocity |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ828 Wind turbines |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Marsudiyana - |
| Date Deposited: | 18 Feb 2025 07:16 |
| Last Modified: | 18 Feb 2025 07:16 |
| URI: | http://repository.its.ac.id/id/eprint/118795 |
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