UTILIZING AN OPEN IMPELLER OF A CENTRIFUGAL PUMP IN REVERSE MODE TO GENERATE ELECTRICITY

Abstract

The increasing demand for electricity, particularly in remote and off-grid regions, has highlighted the need for cost-effective and environmentally sustainable energy solutions. This study investigates the feasibility of utilizing a centrifugal pump, operated in reverse mode with an open impeller, as a turbine for micro-hydro power generation. Small hydropower (SHP) systems, characterized by their affordability and minimal ecological impact, represent a promising alternative to large-scale energy projects. Experimental tests were conducted to evaluate the operational parameters of the open impeller, focusing on the Best Efficiency Point (BEP), power output, and efficiency at varying discharge rates and inlet heads. Results revealed a peak efficiency of 77% at a power output of 3447 W, a rotational speed of 1990 rpm at a head of 13 m, and a flow rate of 14.58 m³/s. The findings demonstrate that the open impeller effectively functions as a micro-turbine, offering a viable solution for electricity generation in isolated rural communities or standalone urban homes with adequate water resources. This study underscores the potential of centrifugal pumps in reverse mode as a cost-efficient and scalable alternative for micro-hydro power systems, fostering energy accessibility in underserved areas.