Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Wind-Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems

Version 1 : Received: 30 March 2021 / Approved: 31 March 2021 / Online: 31 March 2021 (14:48:06 CEST)

How to cite: Gharib-Yosry, A.; Blanco-Marigorta, E.; Fernández-Jiménez, A.; Espina-Valdés, R.; Álvarez-Álvarez, E. Wind-Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems. Preprints 2021, 2021030772 (doi: 10.20944/preprints202103.0772.v1). Gharib-Yosry, A.; Blanco-Marigorta, E.; Fernández-Jiménez, A.; Espina-Valdés, R.; Álvarez-Álvarez, E. Wind-Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems. Preprints 2021, 2021030772 (doi: 10.20944/preprints202103.0772.v1).

Abstract

Smart cities will have a strong impact on the future of renewable energies as terms like sustainability and energy saving will be more common. In this sense, both of wind and hydrokinetic compact-size turbines, can play an important role in urban communities by providing energy to nearby consumption points in an environmentally suitable way. This work presents the experimental evaluation for a vertical-axis turbine Darrieus type, operating in an open-field wind tunnel and a confined water channel. Power and characteristic curves have been obtained for all test conditions, also the effect of turbine blockage has been evaluated under blockage values ranging from 6.8% to 35%. The peak power coefficient for the confined flow condition reached a value of 0.31 which is 1.5 times higher than the peak one for the experimental open field condition at the same Reynolds number and a blockage of 20%. Finally, two blockage correction equations have been applied to the water channel tests, which gave values quite similar to the results obtained from the wind tunnel.

Subject Areas

Sustainability; Urban energy systems; wind turbine; hydrokinetic turbine; blockage.

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