Coupled Hydraulic and Electronic Regulation of Cross-Flow Turbines in Hydraulic Plants
Publication: Journal of Hydraulic Engineering
Volume 143, Issue 1
Abstract
The potential benefit of coupling hydraulic and electronic regulation to maximize the energy production of a cross-flow turbine in hydraulic plants is analyzed and computed with reference to a specific case. Design criteria of the cross-flow turbine inside hydraulic plants are first summarized, along with the use of hydraulic regulation in the case of constant water head and variable discharge. Optimal turbine impeller rotational speed is derived, and traditional as well as innovative systems for electrical regulation are presented. A case study is analyzed to evaluate the potential energy production according to the expected monthly mean flow distribution and two possible choices: CFT1 with the hydraulic regulation, and CFT2 with coupled hydraulic and electric regulations. The return time of capital investment (RCI), computed for both the solutions, showed that the CFT2 solution provides an increment of the total produced energy, along with an increment of approximately 30% of the corresponding RCI. The sensitivity of the results to water head variability and to possible different pipe design criteria in future scenarios is finally discussed.
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Acknowledgments
The authors wish to express their gratitude to the AMAP S.p.A. for providing the mean flow rate delivered to the Risalaimi plant in 2011.
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Information & Authors
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Published In
Journal of Hydraulic Engineering
Volume 143 • Issue 1 • January 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Dec 9, 2015
Accepted: Jun 16, 2016
Published online: Aug 11, 2016
Published in print: Jan 1, 2017
Discussion open until: Jan 11, 2017
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