Data underlying the research of Positive Displacement Reversible Pump-Turbine - Rotor-rotor gap and W/D ratio optimization

CFD simulations for optimizing efficiency in a reversible lobe pump-turbine. The goal is to verify the feasibility of such machine in low-head pumped hydro energy storage applications. It is part of the EU 2020 Horizon 2020 project : ALPHEUS. Based on a gap identified after a literature review, two design parameters were studied to check for optimized values for efficiency on such machines: 1 ) Rotor-rotor gap and 2) Channel Width - Rotor Diameter ratio. Parametric design optimization was studied through 2.5D CFD simulations with ANSYS CFX and TwinMesh software.