Analisa Numerik Pengaruh Posisi Kedalaman Runner dan Diameter Runner Tipe Propeller Terhadap Performa Gravitational Water Vortex Power Plant (GWVPP)

Maysitho, Meidy Elshieradj (2022) Analisa Numerik Pengaruh Posisi Kedalaman Runner dan Diameter Runner Tipe Propeller Terhadap Performa Gravitational Water Vortex Power Plant (GWVPP). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

GWVPP merupakan salah satu micro hydro power plant yang dapat digunakan pada aliran air dengan head yang rendah, yaitu 0.8 meter- 2 meter. Pada penelitian ini dilakukan analisa pengaruh posisi penempatan runner dan diameter runner yang dinyatakan dalam blockage ratio terhadap basin menggunakan metode analisa numerik CFD. Data visualisasi aliran yang diambil antara lain streamline kecepatan, isosurface, water volume fraction, kontur kecepatan dan kontur tekanan. Selain itu data hasil perhitungan numerik juga disajikan dalam bentuk grafik vortex height, torsi dan efisiensi terhadap kecepatan angular. Hasil yang didapatkan dari penelitian yang telah dilakukan, diketahui bahwa runner yang memiliki nilai blockage ratio 0.7 dengan posisi penempatan 70% menghasilkan nilai efisiensi tertinggi, dimana mencapai 61%. Posisi runner di 70% merupakan posisi optimal penempatan runner sebab berpengaruh ke ekstraksi daya hidrolik yang besar karena vortisitas tertinggi terbentuk pada daerah mendekati outlet pada basin konikal. Efek blockage yang berakibat pada besarnya gaya drag akan berkurang seiring dengan mengecilnya blockage ratio
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GWVPP is one micro hydropower plant that was used to with a low head, from 0.8 meters to 2 meters. In this study, it analyzed the effect of runner placement and runner diameter expressed in the blockage ratio to the basin using the CFD numerical analysis method. Visualization of flow data taken includes flow velocity, isosurface, water volume fraction, velocity contour, and pressure contour. In addition, it presented the calculated data as a graph of vortex height, torque, and efficiency concerning angular velocity. Based on the simulation results, it is known that runners who had a blockage ratio value of 0.7 with 70% positioning produce the highest efficiency value, which reaches 61%. The runner position at 70% is the optimal runner placement position because it affects the extraction of enormous hydraulic power. The blockage effect that affects the drag force will decrease as the blockage ratio decreases.

Item Type:	Thesis (Other)
Additional Information:	RSF 531.14 Mas a-1 2022
Uncontrolled Keywords:	Blockage Ratio, CFD, Runner, Torque, Vortex
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ840.A2+ hydraulic machinery
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Anis Wulandari
Date Deposited:	04 Jul 2024 04:46
Last Modified:	04 Jul 2024 04:46
URI:	http://repository.its.ac.id/id/eprint/108128

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