DESIGN AND NUMERICAL SIMULATION OF 5 MW KAPLAN TURBINE WITH 39 M3/S DISCHARGE USING COMPUTATIONAL FLUID DYNAMICS
The government continues its effort to increase the use of renewable energy in Indonesia. Based on RUPTL PT. PLN, from 2019 to 2028 hydro energy-based power plant will be built with 9.5 GW capacity in total. PLTM Bone-1 is one of the hydropower plant in Indonesia that is currently being built with 9...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/66766 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The government continues its effort to increase the use of renewable energy in Indonesia. Based on RUPTL PT. PLN, from 2019 to 2028 hydro energy-based power plant will be built with 9.5 GW capacity in total. PLTM Bone-1 is one of the hydropower plant in Indonesia that is currently being built with 9.9 MW capacity in total using two turbines.
In this research, the Kaplan turbine 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 and expected to be applied to the PLTM Bone-1. The research was started by designing the runner geometry, draft tube, spiral casing, and guide vane and simulated using ANSYS Fluent software at steady state in various variation. Variations used in this research are runner blade angle, guide vane angle, head, and rotational speed.
The Kaplan turbine with six blades on the rotor complete with guide vanes and spiral casing produces optimal power according to the desired criteria. 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 and 14.5 meters head achieved at an operating condition -2,5o runner blade angle and 39.5o guide vane angle with 6.49 MW shaft power and 84% efficiency. The turbine shaft power output at 39 m3/s flow and 14.5 m head is 4,24 MW with 82% efficiency at runner blade angle -2.5o and guide vane angle 48.5o with 125 RPM rotational speed. The results of the pressure contour indicate cavitation that occurs around the hub and the tip of the runner blade.
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