Design and Analysis of 5 MW Kaplan Runner Wheel for Small Hydro Powerplant

Muhammad Febrilian Syah; Priyono Soetikno; Isnain ‘Aliman

Muhammad Febrilian Syah Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung
Priyono Soetikno Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung
Isnain ‘Aliman Department of Mechanical Engineering, The University of Melbourne

Keywords: computational fluid dynamics, draft tube, guide vane, hydroelectric power plant, kaplan runner, spiral casing

Abstract

In 2019 to 2028, Indonesia will build power plants by utilizing new and renewable energy with 9.5 GW comes from hydro power plants [5]. One of the realizations of the small hydro power plant in Indonesia is a power plant located on the Minahasa Peninsula, North Sulawesi, Indonesia that uses two runners with 5 MW generated from each runner. In this research, the suitable Kaplan runner will be designed complete with the spiral casing, guide vane, and draft tube with a desired capacity of 5 MW and flowrate of 39 m3/s. The research was started by designing the runner geometry, draft tube, spiral casing, and guide vane and simulated using RANS Computational Fluid Dynamics at steady state in various variation. Variations used in this research are runner blade angle and guide vane angle. The results of the variation of the guide vane angle at each runner blade angle show the increase of hydraulic efficiency until it reaches a certain peak point before decrease. The configuration that produces the highest efficiency at 150 RPM operating rotational speed achieved at -2.5o blade angle and 39.5o guide vane angle with 6.49 MW hydraulic power and 84% efficiency.

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