Coupled Hydraulic and Electronic Regulation of Cross-Flow Turbines in Hydraulic Plants

AbstractThe 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 R...

[1]  Florian Menter,et al.  The SST Turbulence Model with Improved Wall Treatment for Heat Transfer Predictions in Gas Turbines , 2003 .

[2]  Armando Carravetta,et al.  Cost-Benefit Analysis for Hydropower Production in Water Distribution Networks by a Pump as Turbine , 2014 .

[3]  Rajesh N. Patel,et al.  Investigations on pump running in turbine mode: A review of the state-of-the-art , 2014 .

[4]  Antonio Messineo,et al.  Energy Recovery in Water Distribution Networks. Implementation of Pumps as Turbine in a Dynamic Numerical Model , 2014 .

[5]  Tullio Tucciarelli,et al.  Cross-Flow turbine design for variable operating conditions , 2014 .

[6]  François Avellan,et al.  Turbulence modeling for Francis turbine water passages simulation , 2010 .

[7]  M. Kato.  The modeling of turbulent flow around stationary and vibrating square cylinders , 1993 .

[8]  Dragica Jošt,et al.  Improvement of Efficiency Prediction for a Kaplan Turbine with Advanced Turbulence Models , 2014 .

[9]  Gabriele Freni,et al.  Pump as turbine implementation in a dynamic numerical model: cost analysis for energy recovery in water distribution network , 2015 .

[10]  Oliver Paish,et al.  Small hydro power: technology and current status , 2002 .

[11]  Alfio Consoli,et al.  An Effective Energy-Saving Scalar Control for Industrial IPMSM Drives , 2013, IEEE Transactions on Industrial Electronics.

[12]  Cristiana Bragalli,et al.  Energy Efficiency Optimization in Water Distribution Systems , 2014 .

[13]  A. Carravetta,et al.  Numerical simulation on pump as turbine: Mesh reliability and performance concerns , 2011, 2011 International Conference on Clean Electrical Power (ICCEP).

[14]  Armando Carravetta,et al.  PAT Design Strategy for Energy Recovery in Water Distribution Networks by Electrical Regulation , 2013 .

[15]  Armando Carravetta,et al.  Pump as Turbine (PAT) Design in Water Distribution Network by System Effectiveness , 2013 .

[16]  Gabriele Freni,et al.  Implementation of pressure reduction valves in a dynamic water distribution numerical model to control the inequality in water supply , 2014 .

[17]  G. Scelba,et al.  Steady-State and Transient Operation of IPMSMs Under Maximum-Torque-per-Ampere Control , 2010, IEEE Transactions on Industry Applications.

[18]  Tullio Tucciarelli,et al.  Cross-Flow Turbine Design For Energy Production And Discharge Regulation , 2015 .

[19]  Tullio Tucciarelli,et al.  Experimental Study of Cross-flow Micro-turbines for Aqueduct Energy Recovery☆ , 2014 .

[20]  Armando Carravetta,et al.  Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis , 2013 .

[21]  H. Clergeot,et al.  Modelling and simulation of a doubly fed induction generator in stand alone variable speed hydro turbine , 2005, 2005 European Conference on Power Electronics and Applications.