A Comparative Study of Impeller Modification Techniques on the Performance of the Pump as a Turbine

The extensive use of the pump as a turbine (PAT) for micro-hydropower applications has significant value from economic and technical viewpoints. However, unavailability characteristics curve relatively lower efficiency are two basic limitations when considering pumps power-generating applications. In this paper, performance PAT is analyzed using computational fluid dynamics (CFD) software called Ansys CFX in conjunction with standard k - id="M2"> ε . Then, experiments were done to verify results simulation. Measurement inaccuracy effects also taken into account. initial refined by controlling design parameters (i.e., increasing number impeller blades, decreasing blade thickness, tip rounding, adjusting inlet angle). Additionally, new modification method known grooving introduced research. Finally, all listed techniques applied simultaneously achieve maximum performance. output study confirms that adopted have positive effect on improvement. When impellers increased, power enhanced 5.72%, provides most improvement, i.e., 7.00%. But thickness no remarkable impact performance; improved 1.24% 2.60%, respectively. improvement was achieved 10.56 10.20 percent increments, From entire study, it can be concluded chosen an important stabilizing internal flow, required head, hydraulic loss impeller, overall helps figure out which technique practical.