A numerical investigation into the effect of diffusers on the performance of hydro kinetic turbines using a validated momentum source turbine model

David L.F. Gaden and Eric L. Bibeau

Renewable Energy, 2010, vol. 35, issue 6, 1152-1158

Abstract: Kinetic hydropower involves the use of hydro turbines, submerged within existing currents for power generation. They are applicable to ocean and tidal currents, rivers, and human-made channels. This versatility gives them advantages over conventional hydropower, however they suffer from low power densities. This numerical study investigates the use of diffusers to enhance the performance and viability of kinetic hydro turbines. To simplify the problem, the turbine is modeled as a momentum source region, a strategy that is first validated against Betz theory. The diffuser configuration produces 3.1 times more power than the turbine with no diffuser. A scaling analysis also shows a turbine with a diffuser outperforms a larger size turbine with no diffuser.

Keywords: Kinetic hydropower; Marine current turbine; River kinetic turbine; Momentum source model; Diffuser (search for similar items in EconPapers)
Date: 2010
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Citations: View citations in EconPapers (17)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:35:y:2010:i:6:p:1152-1158

DOI: 10.1016/j.renene.2009.11.023

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