CFD and Experimental Study in the Optimization of an Energy Converter for Low Heads

H. M. Ramos, M. Simão, A. Borga

Abstract


This paper deals with new design of low head turbines, as feasible solutions to solve the lack of energy in rural and remote areas, or to provide energy from urban water pipe systems. Propeller turbines are then the subject of this research because they are suitable for small heads, discharges with little variability, easy to manufacture and with low costs associated. Hence, the aims are the design of quite simple tubular propeller turbines and the analysis of hydrodynamic behaviour for different number and configuration of blades, based on CFD analyses and experimental tests development. An advanced hydrodynamic code based on the finite volume method, as well as blades configuration and mesh specific models are used for the impeller and the turbine design. The blade geometry is optimized using mathematical formulations and experimental results, concerning the possible range of operation under best efficiency conditions. Performance curves are obtained for typical characteristic parameters allowing comparisons between CFD and experimental results. Based on the similarity theory applied to turbomachines it is possible to evaluate the hydrodynamic behaviour through a tubular propeller for different sizes, in a scale model application.

Keywords


Low head turbines, Fluid dynamics, Tubular propeller, CDF analysis, Performance curves

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References


[1] Howey, D. A. (2009). Axial Flux Permanent Magnet Generators for Pico-Hydropower. EWB-UK Research Conference 2009, Hosted by the Royal Academy of Engineering, February 20th.

[2] Simpson, R. G., & Williams, A. A. (2006). Application of Computational Fluid Dynamics to the Design of Pico Propeller Turbines. ICREDC-06, School of Engineering and Applied Sciences, University of the District of Columbia, Washington DC, USA.

[3] Demetriades, G. M. (1997). Design of Low-Cost Propeller Turbines for Standalone Micro-hydroelectric Generation Units (Doctoral Dissertation). University of Nottingham, UK.

[4] Upadhyay, D. (2004). Low Head Turbine Development using Computational Fluid Dynamics (Doctoral Dissertation). University of Nottingham, UK.

[5] Alexander, K. V., Giddens, E. P., & Fuller, A. M. (2009). Axial-Flow Turbines for Microhydro Systems. Elsevier Journal of Renewable Energy, 34, 35-47.

[6] Skotak, A., Mikulasek, J., & Obrovsky, J. (2009). Development of the New High Specific Speed Fixed Blade Turbine Runner. International Journal of Fluid Machinery and Systems, 2(4).

[7] Ramos, H. M., Borga, A., & Simão, M. (2009). New Design Solutions for Low-Power Energy Production in Water Pipe Systems. Water Science and Engineering, 2(4), 69-84. doi:10.3882/j.issn.1674-2370.2009.04.007

[8] Ramos, H. M., Borga, A., & Simão, M. (2010). Energy Production in Water Supply Systems: Computational Analysis for New Design Solutions. London, Taylor & Francis Group.

[9] Fluent 6.3. (2006). User’s Guide. USA.

[10] Scott-Pomerantz, C. D. (2004). The k-Epsilon Model in the Theory of Turbulence (Doctoral Dissertation). University of Pittsburg, USA.

[11] Ansys CFX 11.0. (2006). Tutorials. PA 15317, South Pointe 275 Technology Drive, Canonsburg.

[12] Ramos, H. M., Borga, A., & Simão, M. (2009). Cost-Effective Energy Production in Water Pipe Systems: Theoretical Analysis for New Design Solutions. 33rd IAHR Congress. Water Engineering for a Sustainable Environment. Managed by EWRI of ASCE on behalf of IAHR. Vancouver, British Columbia, Canada, August 9-14.

[13] Ramos, H.M., Simão, M, & Kenov, K. N. (2012). Low-Head Energy Conversion: A Conceptual Design and Laboratory Investigation of a Microtubular Hydro Propeller. International Scholarly Research Network, ISRN Mechanical Engineering, Article ID 846206, 1-10. doi:10.5402/2012/846206




DOI: http://dx.doi.org/10.3968/j.est.1923847920120402.142

DOI (PDF): http://dx.doi.org/10.3968/pdf

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