The need for electricity today is generally still dependent on coal. However, the fact on the ground is that the amount of coal energy supply for power plants is in short supply. There must be steps to increase the supply of power plants that use New and Renewable Energy sources. Indonesia has the potential to build power plants that use New and Renewable Energy sources, namely water energy. In the field, water does not always have a strong enough discharge to drive a turbine. Therefore, this research will discuss the effect of variations in water discharge using a pump so that it can regulate the flow rate to be used to see the effect of motor rotation, pressure drop, and power generated. This research will be conducted at full valve opening, 3/4 intake valve opening, and 1/2 intake valve opening with variations in rotation from 700 rpm to 1000 rpm. From the research results, it is found that the higher the pump rotation, the higher the discharge produced. The valve opening affects the pressure drop value. Because the pressure drop has a relationship with cavitation, namely the formation of vapor in the fluid flow due to a decrease in pressure. Discharge has a directly proportional relationship with mechanical power. This can be said because motor rotation is also directly proportional to the resulting discharge.

Keywords : Suction, flowrate, pressure drop.