• Vol 8, No 7 (2017)
  • Mechanical Engineering

Simple Bucket Curvature for Designing a Low-head Turgo Turbine for Pico Hydro Application

Warjito , Budiarso , Ahmad Indra Siswantara, Dendy Adanta, Mustafa Kamal, Reza Dianofitra

Corresponding email: warjito@eng.ui.ac.id


Published at : 27 Dec 2017
IJtech : IJtech Vol 8, No 7 (2017)
DOI : https://doi.org/10.14716/ijtech.v8i7.767

Cite this article as:
Warjito., Budiarso., Siswantara, A.I., Adanta, D., Kamal, M., Dianofitra, R., 2017. Simple Bucket Curvature for Designing a Low-head Turgo Turbine for Pico Hydro Application. International Journal of Technology, Volume 8(7), pp. 1239-1247
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Warjito Department of Mechanical Engineering
Budiarso Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia
Ahmad Indra Siswantara Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia
Dendy Adanta - Department of mechanical engineering
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Mustafa Kamal Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia
Reza Dianofitra Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia
Email to Corresponding Author

Abstract
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The geography of Indonesia renders it difficult to connect many areas to the national electricity grid. To overcome these problems, people need to be able to generate their own electricity. Pico hydro has been proven to be a cost-effective solution for electrification. The Turgo turbine is known for its reliability and strength, and it can perform efficiently with a range of flows. The Turgo’s blade consists of an inlet and outlet trail with a curve that joins them. The curve in this study will be made from a simple circle arc to improve manufacturability. Three blades were designed using a basic calculation derived from the velocity triangles, with each blade having a different circle radius. The Computational Fluid Dynamics (CFD) method is used to determine the stream flow through the blade at a level of detail that cannot be obtained using other methods. The boundary conditions used in the study include 2.7 meters of head and a 21 l/s flow rate, a steady-state homogenous multiphase, and the turbulent models used SST k-?. The result shows that the Turgo turbine with a 60 mm arc radius generated 477.7 Watts and has an efficiency of 85.97%, the highest when compared to the other two blades that used 50 mm and 55 mm arc radii, respectively.

CFD; Electrification ratio; Pico-hydro; Turgo turbine

Conclusion

The theoretical power that is developed from the analytical calculation is 429.953 watts, with a maximum efficiency of 75.6%. A steady-state homogenous multiphase simulation is conducted to know the flow condition along each blade. The simulation shows that the 60 mm arc radius blade generated 477.708 watts with an 85.97% efficiency at a head of 2.7 m, speed ratio of 0.5, and a flow rate of 0.021 m3/s, which was the highest when compared to the other blades.

Acknowledgement

The authors would like to express their thanks to KEMENRISTEK DIKTI, which has funded this research with grant No. SP. DIPA-042.06.1.401516/2016.

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