Hydraulic design and optimization of a modular pump-turbine runner

Abstract

a b s t r a c tA novel modular pumped-storage scheme is investigated that uses elevated water storage towers and cement pools as the upper and lower reservoirs. The scheme serves a second purpose as part of the wastewater treatment process, providing multiple benefits besides energy storage. A small pumped-storage scheme has been shown to be a competitive energy storage solution for micro renewable energy grids; however, pumped-storage schemes have not been implemented on scales smaller than megawatts. Off-the-shelf runner designs are not available for modular pumped-storage schemes, so a custom runner design is sought. A preliminary hydraulic design for a pump-turbine runner is examined and optimized for increased pumping hydraulic efficiency using a response surface optimization methodology. The hydraulic pumping efficiency was found to have improved by 1.06% at the best efficiency point, while turbine hydraulic efficiency decreased by 0.70% at the turbine best efficiency point. The round-trip efficiency for the system was estimated to be about 78%, which is comparable to larger pumped-storage schemes currently in operation.

Analysis on Guide Vane Closure Schemes of High‐Head Pumped Storage Unit during Pump Outage Condition

“…erefore, the larger the growth of renewable energy, the larger the need of PSPS to balance the load variation and increase the network reliability [9]. Another feature is their flexibility to make up for the stochastic of solar and wind power, which is helpful for the multienergy complement [10]. e reversible pump turbine is an important component of the PSPS which experiences different transitional processes to achieve the function of regulation by switching between turbine and pump mode [11,12].…”

Dynamic modeling and dynamical analysis of pump-turbines in S-shaped regions during runaway operation

“…Since the pump storage power plant can store energy and generate power according to load fluctuations, it plays an important role in the grid system [2]. With the development of the modern technologies of the pump storage power plant, pump-turbines are moving toward the high head, large capacity and high speed to obtain better economic efficiency [3]. However, pump-turbines change frequently between different conditions and often operate in two directions.…”

“…Xu et al [13] proposed an adaptively fast fuzzy fractional order PID control method for the pumped storage hydro unit and they used a novel bacterial-foraging chemotaxis gravitational search algorithm to get the optimized parameters. Schleicher and Oztekin [14] investigated a novel modular pumped-storage scheme that uses elevated water storage and cement pools as the upper and lower reservoirs. Moreover, Li et al [15] analyzed the regions of the hump characteristics.…”

Parametric Design of an Ultrahigh-Head Pump-Turbine Runner Based on Multiobjective Optimization

“…More systematic approaches, such as optimization techniques, have been applied in the design of turbomachinery [9,15]. Optimal design associated to turbomachinery is a multiobjective and difficult problem by its nature.…”

“…Computational fluid dynamics (CFD) has been widely used in the development of the pump-turbine runner [8,9]. The profile of the runner can be modified by changing the design parameters on the basis of internal flow analysis [10,11].…”