Centrifugal Pump Charactristecs

Centrifugal pumps are turbomachines that are used for conveying fluids. This unit can be used to study a centrifugal pump and to record a typical pump characteristic curve. The experimental unit includes a centrifugal pump, a ball valve on the outlet side and manometers on the inlet and outlet side. It is driven by an asynchronous motor. The speed is infinitely adjustable by using a frequency converter. A ball valve is used to adjust the head. In experiments, the operating behaviour of the pump as a function of the flow rate is studied and displayed in characteristic curves. The motor’s speed and electrical power are displayed digitally. Pressures on the inlet and outlet side are displayed on two manometers. The experimental unit is positioned easily and securely on the work surface of the base module. The pump draws in water from the tank on the base module. The flow rate is determined volumetrically by flowing back into the measuring tank.

Learning Objectives

• Familiarisation with operating behaviour and characteristics of a centrifugal pump through experiments
• Recording the pump characteristic curve at a constant pump speed
• Measuring the inlet and outlet pressure
• Determining the flow rate
• Recording the pump characteristics for different speeds
• Power and efficiency curves
• Measuring the electrical drive power
• Determining the hydraulic power
• Calculating the efficiency