Sianipar, Austin Anggia (2026) Studi Eksperimental Pengaruh Posisi Runner dan Flow Rate terhadap Kinerja Gravitational Vortex Water Turbine (GVWT) serta Karakteristik Vibrasi. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Gravitational Vortex Water Turbine (GVWT) Dapat Digunakan Untuk Memanfaatkan Energi Air Pada Lokasi Dengan Head Rendah. Kinerja Turbin Dipengaruhi Oleh Kondisi Aliran Vortex, Posisi Runner, Debit, Dan Pembebanan. Interaksi Antara Aliran Dan Runner Juga Menghasilkan Gaya Yang Berubah Terhadap Waktu Sehingga Respons Getaran Perlu Dianalisis Bersama Dengan Kinerja Energi. Penelitian Ini Bertujuan Untuk Menganalisis Pengaruh Posisi Runner Dan Debit Aliran Terhadap Kinerja Serta Karakteristik Getaran GVWT. Pengujian Dilakukan Pada Basin Konikal Menggunakan Runner Tipe Propeller Berdiameter 0,34 M. Posisi Runner Divariasikan Sebesar 10%, 20%, 30%, Dan 40% Yang Diukur Dari Bagian Atas Basin Menuju Bagian Bawah, Sedangkan Debit Aliran Divariasikan Sebesar 0,039 M³/S, 0,052 M³/S, Dan 0,058 M³/S. Parameter Yang Dianalisis Meliputi RPM, Estimasi Torsi, Estimasi Daya Mekanik, Efisiensi, RMS Getaran, Frekuensi Dominan, Serta Respons Model Getaran Berbasis Sepuluh Node. Hasil Penelitian Menunjukkan Bahwa Posisi Runner Yang Semakin Dalam Dan Debit Aliran Yang Semakin Besar Cenderung Meningkatkan Estimasi Torsi, Estimasi Daya Mekanik, Dan Efisiensi, Tetapi Juga Diikuti Oleh Peningkatan Getaran. Estimasi Daya Mekanik Dan Efisiensi Tertinggi Diperoleh Pada Posisi Runner 40% Dan Debit 0,058 M³/S, Masing-Masing Sebesar 74,03 W Dan 70,02%. Kondisi Operasi Yang Direkomendasikan Pada Rentang Pengujian Adalah Posisi Runner 40% Dan Debit 0,052 M³/S Karena Menghasilkan Estimasi Daya Mekanik Sebesar 65,96 W Dan Efisiensi Sebesar 69,45% Dengan Tingkat Getaran Yang Lebih Rendah. Model Getaran Mampu Mengikuti Kecenderungan RMS Eksperimen Pada Arah X Dan Y, Dengan Seluruh Respons Yang Dievaluasi Memiliki Error Di Bawah 10%. Hasil Tersebut Menunjukkan Bahwa Penentuan Kondisi Operasi GVWT Perlu Mempertimbangkan Kinerja Energi Dan Tingkat Getaran Secara Bersamaan.
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A Gravitational Vortex Water Turbine (GVWT) Can Be Used To Utilize Water Energy At Low-Head Sites. Turbine Performance Is Influenced By Vortex Flow Conditions, Runner Position, Flow Rate, And Loading. The Interaction Between The Flow And The Runner Also Generates Time-Varying Forces; Therefore, The Vibration Response Needs To Be Analyzed Together With The Energy Performance. This Study Aims To Analyze The Effects Of Runner Position And Flow Rate On The Performance And Vibration Characteristics Of A GVWT. The Experiments Were Conducted In A Conical Basin Using A Propeller-Type Runner With A Diameter Of 0.34 M. The Runner Position Was Varied At 10%, 20%, 30%, And 40%, Measured From The Upper Part Of The Basin Toward The Bottom, While The Flow Rates Were Varied At 0.039 M³/S, 0.052 M³/S, And 0.058 M³/S. The Analyzed Parameters Included RPM, Estimated Torque, Estimated Mechanical Power, Efficiency, Vibration RMS, Dominant Frequency, And The Response Of A Ten-Node Vibration Model. The Results Show That A Deeper Runner Position And A Higher Flow Rate Tend To Increase The Estimated Torque, Estimated Mechanical Power, And Efficiency, But Are Also Followed By An Increase In Vibration. The Highest Estimated Mechanical Power And Efficiency Were Obtained At The 40% Runner Position And A Flow Rate Of 0.058 M³/S, With Values Of 74.03 W And 70.02%, Respectively. The Recommended Operating Condition Within The Tested Range Was The 40% Runner Position And A Flow Rate Of 0.052 M³/S Because It Produced An Estimated Mechanical Power Of 65.96 W And An Efficiency Of 69.45% With A Lower Vibration Level. The Vibration Model Was Able To Follow The Trend Of The Experimental RMS Responses In The Xand Ydirections, With All Evaluated Responses Having Errors Below 10%. These Results Indicate That Determining The Operating Condition Of A GVWT Should Consider Both Energy Performance And Vibration Level.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | debit aliran, efisiensi, getaran, Gravitational Vortex Water Turbine, posisi runner, efficiency, flow rate, Gravitational Vortex Water Turbine, runner position, vibration |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ266 Turbines. Turbomachines (General) T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting. T Technology > TJ Mechanical engineering and machinery > TJ870 Hydraulic turbines. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Austin Anggia Sianipar |
| Date Deposited: | 03 Aug 2026 03:06 |
| Last Modified: | 03 Aug 2026 03:06 |
| URI: | http://repository.its.ac.id/id/eprint/141946 |
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