Enhancement efficiency of Michell-Banki turbine using NACA 6512 modified blade profile via CFD

Keywords: Computational fluids dynamics, efficiency, cross-flow turbine, micro hydropower

Abstract

The small hydroelectric power plants (SHPP) are implemented in non-interconnected zones (NIZ) of developing countries. In which, the provision of electrical energy from the national interconnected system is not economically feasible. Therefore, in the literature, hydroelectric generation technologies have been implemented taking advantage of the energy available in the rivers. One of these technologies is the Michell-Banki type cross-flow turbines (MBT), which, despite having lower efficiencies than turbines such as Pelton and Francis, maintain their efficiency although fluctuations in site conditions. For this reason, different studies have been made to increase the efficiency of the MBT by making geometric modifications to both the nozzle and the rotor.

The purpose of this study is to determine numerically the effect of the geometry of the blades that form the runner on the efficiency of Michell-Banki Turbine (MBT). For this, two (2) geometries were studied corresponding to a circular sector of a standard tubular profile and an airfoil NACA 6512 modified in curvature profile and chord length, according to the profile of the standard tubular blade. For this study, transient simulations for multiphase water-air flow were implemented using a k-ε turbulence model in the Ansys 2020R1® CFX software. The two (2) turbine models were configured to the same hydraulic conditions of head and volumetric flow corresponding to 0.5 m and 16.27 L/s, respectively. Variations in rotational speed were configured between 100 and 200 RPM with 20 RPM steps. It was found that using the modified 6512 hydrodynamic profile, at 140 RPM increased efficiency by 6 %, compared to the conventional tubular type blade geometry

Downloads

Download data is not yet available.

Author Biographies

Steven Galvis-Holguin, Metropolitan Technological Institute

Department of Mechatronics Engineering

Jorge Sierra-Del Rio, Metropolitan Technological Institute; Pascual Bravo University Institution

Department of Mechatronics Engineering

Department of Engineering

Research Group - GIIAM

D. Hincapié-Zuluaga, Metropolitan Technological Institute

Department of Mechatronics Engineering

References

Technical Analysis of Conversion of A Steam Power Plant to Combined Cycle, Using Two Types of Heavy Duty Gas Turbines (2015). International Journal of Engineering, 28 (5 (B)). doi: https://doi.org/10.5829/idosi.ije.2015.28.05b.17

Woldemariam, E., Lemu, H., Wang, G. (2018). CFD-Driven Valve Shape Optimization for Performance Improvement of a Micro Cross-Flow Turbine. Energies, 11 (1), 248. doi: https://doi.org/10.3390/en11010248

EIA projects 28% increase in world energy use by 2040 (2017). Today in Energy. Available at: https://www.eia.gov/todayinenergy/detail.php?id=32912

Tawi, K., Yaakob, O., Sunanto, D. T. (2010). Computer simulation studies on the effect overlap ratio for savonius type vertical axis marine current turbine. International Journal of Engineering, 23 (1), 79–88. Available at: https://www.ije.ir/article_71836.html

Gaona, E. E., Trujillo, C. L., Guacaneme, J. A. (2015). Rural microgrids and its potential application in Colombia. Renewable and Sustainable Energy Reviews, 51, 125–137. doi: https://doi.org/10.1016/j.rser.2015.04.176

Yaakob, O. B. (2013). Experimental Studies on Savonius-type Vertical Axis Turbine for Low Marine Current Velocity. International Journal of Engineering, 26 (1 (A)). doi: https://doi.org/10.5829/idosi.ije.2013.26.01a.12

Paish, O. (2002). Small hydro power: technology and current status. Renewable and Sustainable Energy Reviews, 6 (6), 537–556. doi: https://doi.org/10.1016/s1364-0321(02)00006-0

Liu, H., Masera, D., Esser, L. (Eds.) (2013). World Small Hydropower Development Report. United Nations Industrial Development Organization; International Center on Small Hydro Power. Available at: https://www.osti.gov/etdeweb/servlets/purl/1120941

Zanette, J., Imbault, D., Tourabi, A. (2010). A design methodology for cross flow water turbines. Renewable Energy, 35 (5), 997–1009. doi: https://doi.org/10.1016/j.renene.2009.09.014

Adhikari, R. C., Wood, D. H. (2017). A new nozzle design methodology for high efficiency crossflow hydro turbines. Energy for Sustainable Development, 41, 139–148. doi: https://doi.org/10.1016/j.esd.2017.09.004

Adhikari, R., Wood, D. (2018). The Design of High Efficiency Crossflow Hydro Turbines: A Review and Extension. Energies, 11 (2), 267. doi: https://doi.org/10.3390/en11020267

Sammartano, V., Aricò, C., Carravetta, A., Fecarotta, O., Tucciarelli, T. (2013). Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis. Energies, 6 (5), 2362–2385. doi: https://doi.org/10.3390/en6052362

Ceballos, Y. C., Valencia, M. C., Zuluaga, D. H., Del Rio, J. S., García, S. V. (2017). Influence of the number of blades in the power generated by a Michell Banki Turbine. International Journal of Renewable Energy Research (IJRER), 7 (4), 1989–1997.

Chichkhede, S., Verma, V., Gaba, V. K., Bhowmick, S. (2016). A Simulation Based Study of Flow Velocities across Cross Flow Turbine at Different Nozzle Openings. Procedia Technology, 25, 974–981. doi: https://doi.org/10.1016/j.protcy.2016.08.190

Verma, V., Gaba, V. K., Bhowmick, S. (2017). An Experimental Investigation of the Performance of Cross-flow Hydro Turbines. Energy Procedia, 141, 630–634. doi: https://doi.org/10.1016/j.egypro.2017.11.084

Popescu, D., Popescu, C., Dragomirescu, A. (2017). Flow control in Banki turbines. Energy Procedia, 136, 424–429. doi: https://doi.org/10.1016/j.egypro.2017.10.272

Vilchez, M. A. A. (2015). Geometría del álabe del rotor para mejorar el toque en una turbina Michell - Banki. Huáncayo. Available at: https://repositorio.uncp.edu.pe/handle/20.500.12894/201

Adanta, D., Budiarso, B., Warjito, W., Siswantara, A. I., Prakoso, A. P. (2018). Performance Comparison of NACA 6509 and 6712 on Pico Hydro Type Cross-Flow Turbine by Numerical Method. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 45 (1), 116–127. Available at: https://akademiabaru.com/submit/index.php/arfmts/article/view/2188

Shepherd, D. G. (1956). Principles of Turbomachinery. Macmillan, 463.

Warjito, R. D., Siswantara, A. I., Adanta, D., Prakoso, A. P., Dianofitra, R. (2017). Comparison between Airfoil NACA-6712 Profiled and Ordinary Blade in Cross-flow Turbine by Numerical Simulation. The 15th International Conference on Quality in Research (QiR 2017). Available at: https://scholar.ui.ac.id/en/publications/comparison-between-airfoil-naca-6712-profiled-and-ordinary-blade-

Dragomirescu, A. (2016). Numerical investigation of the flow in a modified Bánki turbine with nozzle foreseen with guide vanes. 2016 International Conference and Exposition on Electrical and Power Engineering (EPE). doi: https://doi.org/10.1109/icepe.2016.7781461

Mockmore, C., Merryfield, F. (1949). The Banki water turbine. Corvallis, Or.: Oregon State College, Engineering Experiment Station. Available at: http://hdl.handle.net/1957/32305

Pérez, E. P., Carrocci, L. R., Filho, P. M., Luna, C. R. (2007). Metodología de Diseño Hidráulico y Mécanico de una Turbina Michell-Banki. 8º Congreso Iberoamericano De Ingenieria Mecanica. Available at: https://congreso.pucp.edu.pe/cibim8/pdf/06/06-87.pdf

Manual de diseno, estandarizacion y fabricacion de equipos para pequeñas centrales hidroelectricas. Olade. Available at: https://biblioteca.olade.org/cgi-bin/koha/opac-detail.pl?biblionumber=3208&shelfbrowse_itemnumber=4436

Sammartano, V., Morreale, G., Sinagra, M., Collura, A., Tucciarelli, T. (2014). Experimental Study of Cross-flow Micro-turbines for Aqueduct Energy Recovery. Procedia Engineering, 89, 540–547. doi: https://doi.org/10.1016/j.proeng.2014.11.476


👁 37
⬇ 36
Published
2022-03-31
How to Cite
Galvis-Holguin, S., Rio, J. S.-D., & Hincapié-Zuluaga, D. (2022). Enhancement efficiency of Michell-Banki turbine using NACA 6512 modified blade profile via CFD. EUREKA: Physics and Engineering, (2), 55-67. https://doi.org/10.21303/2461-4262.2022.002351
Section
Energy