10.1007/s40095-021-00445-6

Design process sequence of crossflow turbine system and the evaluation of structural integrity factors

  • Williams S. Ebhota*1,
  • Pavel Y. Tabakov1,
  1. Department of Mechanical Engineering, Institute for Systems Science, Durban University of Technology, Durban, ZA

Published in Issue 2021-11-08

How to Cite

Ebhota, W. S., & Tabakov, P. Y. (2021). Design process sequence of crossflow turbine system and the evaluation of structural integrity factors. International Journal of Energy and Environmental Engineering, 13(3 (September 2022). https://doi.org/10.1007/s40095-021-00445-6
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Abstract

Abstract The study deals with the design and analyses of fundamental parameters based on optimization conditions of crossflow turbine (CFT) critical parts—the runner, nozzle, shaft, transmission belt, and pulley. The net head ( H n ) and turbine power ( P t ) for this study are 13 m and 56 kW, respectively, and these parameters serve as the fundamental inputs for designing and sizing of CFT parts. Other basic inputs used are flow rate ( Q ) of 0.5 m 3 /s and alternator speed ( N G ) of 1500 revolution per minute (rpm). The simulation report shows that 3 mm blade thickness and a shaft diameter of 50 mm meet the design requirements. A D-type of V-belt with a corresponding pulley will be required to transmit the generated turbine power to the alternator. A 3-D model was created with Solidworks based on the design values and this was used to validate the structural integrity of the shaft under static loading. The simulation results, based on von Mises principle, were satisfactory. The simulation results show that the structural integrity of the runner is influenced by certain parameters. This includes (i) the thickness of the blade; (ii) the length of the blade; and (iii) the number of rims per runner, which serves as blades’ reinforcements. The number of rims affects the structural integrity of the blade more than the blade thickness factor, and a shaft of 50 mm diameter can transmit turbine power of about 56 kW optimally with a minimum factor of safety (FOS) of 2.6.

Keywords

  • Small hydropower (SHP),
  • Crossflow runner blade,
  • Hydro turbine design,
  • Renewable energy,
  • Runner,
  • Crossflow turbine shaft

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