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

A numerical investigation into the effect of diffusers on the performance of hydro kinetic... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Renewable Energy Elsevier

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

Renewable Energy, Volume 35 (6) – Jun 1, 2010

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Publisher
Elsevier
Copyright
Copyright © 2009 Elsevier Ltd
ISSN
0960-1481
eISSN
1879-0682
D.O.I.
10.1016/j.renene.2009.11.023
Publisher site
See Article on Publisher Site

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.

Journal

Renewable EnergyElsevier

Published: Jun 1, 2010

References

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