Studi Numerik Pengaruh Kelengkungan Basin Terhadap Kualitas Aliran Vortex Pada Gravitational Water Vortex Power Plant (GWVPP)

Amru, Aliyya Dhiya (2023) Studi Numerik Pengaruh Kelengkungan Basin Terhadap Kualitas Aliran Vortex Pada Gravitational Water Vortex Power Plant (GWVPP). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Gravitational Water Vortex Power Plant (GWVPP) merupakan teknologi hydropower yang memanfaatkan konsep pusaran bebas (free vortex) untuk membangkitkan energi. Pada GWVPP, terjadi free vortex yang mana partikel fluida bergerak secara translasi mengikuti bentuk basin yang melingkar. Salah satu yang mempengaruhi kualitas aliran vortex adalah bentuk geometri basin. Pada penelitian ini, dibahas mengenai pengaruh kelengkungan pada basin berbasis CFD. Bentuk geometri basin pada penelitian ini adalah basin cembung dan basin cekung. Hasil simulasi menunjukkan bahwa bertambahnya flowrate berpengaruh terhadap meningkatnya nilai vortex height, kecepatan tangensial, dan vortex strength. Flowrate yang tinggi membuat kualitas vortex yang baik dan tergolong vortex kuat. Selain variasi flowrate, variasi kelengkungan pada basin mempengaruhi kualitas vortex yang dihasilkan. Basin cekung menghasilkan vortex height dan kecepatan tangensial yang lebih besar dibandingkan basin cembung. Sedangkan basin cembung menghasilkan vortex strength yang sedikit lebih besar dibandingkan basin cekung. Variasi terbaik terdapat pada basin cekung tipe 4 yang memiliki nilai vortex height 0,512 m dengan kecepatan tangensial yang diraih sebesar 1,33 m/s. Pengaruh variasi flowrate dan kelengkungan juga berpengaruh terhadap energi yang dihasilkan. Pada kedalaman Z/h = -0,66 (65%), potensi energi yang baik dimiliki oleh basin cembung tipe 1 dan basin cekung tipe 4. Sedangkan pada kedalaman Z/h = -0,79 (79%), potensi energi terbaik dimiliki oleh basin cekung tipe 1 dan basin cembung tipe 4.
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Gravitational Water Vortex Power Plant (GWVPP) is a hydropower technology that utilizes the free vortex concept to generate energy. In GWVPP, there is a free vortex in which the fluid particles move in translation following a circular basin shape. One that affects the quality of the vortex flow is the geometric shape of the basin. In this study, the effect of curvature on the CFD-based basin is discussed. The geometry of the basin in this study is a convex basin and a concave basin. The simulation results show that the increase in flow rate affects the increase in the value of vortex height, tangential velocity, and vortex strength. A high flow rate makes a good vortex quality and is classified as a strong vortex. In addition to variations in flow rate, variations in the curvature of the basin affect the quality of the resulting vortex. Concave basins produce greater vortex height and tangential velocities than convex basins. Meanwhile, convex basins produce a slightly greater vortex strength than concave basins. The best variation is found in the type 4 concave basin which has a vortex height value of 0.512 m with a tangential velocity of 1.33 m/s. The influence of variations in flow rate and curvature also affects the energy produced. At a depth of Z/h = -0.66 (65%), convex basin type 1 and concave basin type 4 have good energy potential. Meanwhile, at a depth of Z/h = -0.79 (79%), the best energy potential is owned by concave basin type 1 and convex basin type 4.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	basin, GWVPP, vortex, basin, GWVPP, vortex
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA357 Computational fluid dynamics. Fluid Mechanics T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Aliyya Dhiya' Amru
Date Deposited:	26 Jul 2023 01:19
Last Modified:	26 Jul 2023 01:19
URI:	http://repository.its.ac.id/id/eprint/99267

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