Pengujian Turbin Air Pusaran Gravitasi dengan Variasi Overlap Ratio Rotor

Authors

DOI:

https://doi.org/10.25077/metal.6.1.14-23.2022

Keywords:

Gravitational Water Vortex Turbine, Savonius, Overlap Ratio, Microhydro, Endplate

Abstract

The gravitational water vortex turbine is a turbine system that can convert the energy from artificial water vortex by means of the drained water through the basin outlet to the kinetic energy of rotor rotation. This type of turbine system is able to produce energy despite the low head of water flow. Many researches were conducted to improve the efficiency of this turbine by changing the shape of basin, or the rotor. Meanwhile, the Savonius rotor has good starting rotation and ease of fabrication, but low efficiency. One way to increase the efficiency of this rotor is to apply the gap between the blades which is called Overlap Ratio (OR). In this research, the gravitational water vortex turbine with the conical-shape basin was combined with the various-OR Savonius rotors with area proportion of 26,88% and without endplate and the effect was observed to the efficiency of turbine. The volume flowrate of channel was maintained constant at 0,005 m3/s while mass was added gradually for the torque measurement system by using rope brake dynamometer. The result showed that for all rotors, the greater efficiency occurred in the low rotational speed. Moreover, the rotor with OR of 0,15 had greater mechanical efficiency which was around 22,78% for the rotor with endplate 26,88% and 27,18% for the rotor without endplate than rotor with OR of 0. Meanwhile, rotor without endplate had higher maximum mechanical efficiency for all OR variation than that with endplate 26,88%.

Author Biographies

Muhammad Luthfi, Politeknik Negeri Indramayu

Jurusan Teknik Mesin

Meri Rahmi, Politeknik Negeri Indramayu

Jurusan Teknik Mesin

Rachmatullah -, Politeknik Negeri Indramayu

Jurusan Teknik Mesin

References

Y. Saefulhak, T. Mumpuni, dan F. Tumiwa, “ENERGI TERBARUKAN: Energi Untuk Kini dan Nanti-Seri 10 Pertanyaan,†Jakarta, 2017.

E. Beach, “Hydro Power Vs. Solar Power Advantages,†2018. [Daring]. Tersedia pada: https://sciencing.com/hydro-power-vs-solar-power-advantages-6513.html. [Diakses: 03-Des-2020].

K. P. Puslitbang Sumber Daya Air, “Rata-rata Harian Aliran Sungai, Tinggi Aliran, dan Volume Air di Beberapa Sungai yang Daerah Pengalirannya Lebih dari 100 km2, 2015,†2017. [Daring]. Tersedia pada: https://www.bps.go.id/statictable/2017/11/14/1984/rata-rata-harian-aliran-sungai-tinggi-aliran-dan-volume-air-di-beberapa-sungai-yang-daerah-pengalirannya-lebih-dari-100-km2-2015.html. [Diakses: 05-Des-2020].

M. Heinsdorff, “Rotor Module.†[Daring]. Tersedia pada: https://www.mobilehydro.com/rotormodul/. [Diakses: 03-Des-2020].

P. Sritram dan R. Suntivarakorn, “The effects of blade number and turbine baffle plates on the efficiency of free-vortex water turbines,†IOP Conf. Ser. Earth Environ. Sci., vol. 257, hal. 12040, 2019.

Y. Nishi dan T. Inagaki, “Performance and Flow Field of a Gravitation Vortex Type Water Turbine,†Int. J. Rotating Mach., vol. 2017, hal. 2610508, 2017.

T. C. Kueh, S. L. Beh, Y. S. Ooi, dan D. G. Rilling, “Experimental study to the influences of rotational speed and blade shape on water vortex turbine performance,†J. Phys. Conf. Ser., vol. 822, hal. 12066, 2017.

R. Dhakal, T. R. Bajracharya, S. R. Shakya, dan B. Kumal, “Computational and Experimental Investigation of Runner for Gravitational Water Vortex Power Plant,†2017.

S. Hadi, H. Khuluqi, D. M. Prabowoputra, A. Prasetyo, D. D. D. P. Tjahjana, dan A. Farkhan, “Performance of Savonius Horizontal Axis Water Turbine in Free Flow Vertical Pipe as Effect of Blade Overlap,†J. Adv. Res. Fluid Mech. Therm. Sci., vol. 58, no. 2, hal. 219–223, 2019.

V. Patel, G. Bhat, T. I. Eldho, dan S. V Prabhu, “Influence of overlap ratio and aspect ratio on the performance of Savonius hydrokinetic turbine,†Int. J. Energy Res., vol. 41, no. 6, hal. 829–844, Mei 2017.

S. Dhakal dkk., “Comparison of cylindrical and conical basins with optimum position of runner: Gravitational water vortex power plant,†Renew. Sustain. Energy Rev., vol. 48, hal. 662–669, 2015.

N. H. Mahmoud, A. A. El-Haroun, E. Wahba, dan M. H. Nasef, “An experimental study on improvement of Savonius rotor performance,†Alexandria Eng. J., vol. 51, no. 1, hal. 19–25, 2012.

R. Ullah, T. A. Cheema, A. S. Saleem, S. M. Ahmad, J. A. Chattha, dan C. W. Park, “Performance analysis of multi-stage gravitational water vortex turbine,†Energy Convers. Manag., vol. 198, hal. 111788, 2019.

P. Wichian dan R. Suntivarakorn, “The Effects of Turbine Baffle Plates on the Efficiency of Water Free Vortex Turbines,†Energy Procedia, vol. 100, hal. 198–202, 2016.

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Published

2022-04-30

How to Cite

Luthfi, M., Rahmi, M., & -, R. (2022). Pengujian Turbin Air Pusaran Gravitasi dengan Variasi Overlap Ratio Rotor. METAL: Jurnal Sistem Mekanik Dan Termal, 6(1), 14–23. https://doi.org/10.25077/metal.6.1.14-23.2022

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Vol. 6 No. 1 (2022): Jurnal Sistem Mekanik dan Termal (METAL)

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