Pump Characteristics Experiment

  SPECIFICATIONS:   Pump characteristics experiment, showing upper and lower polycarbonate tanks with connecting pipe and valve, inlet manifold, belt-driven gear pump and centrifugal pump, variable speed DC motor with torque arm and load cell.  Flow circuit includes pump, pressure transducer, metering valve, orifice/differential pressure transducer, turbine meter, rotameter, return line to upper tank.  Panel meters display pump RPM, discharge pressure, orifice differential pressure, and flow rate.

Packed-Bed NH3 (or CO2) Absorber

Catalytic Hydrolysis of Ethyl Acetate

Power Consumption & Mixing Efficiency in Agitation

Membrane Air Separation

Copper Liquid-Liquid Extraction

Flash Vaporizer Dynamics and Control

Dye Mixer Dynamics and Control

Pump Characteristics Experiment

Wind Power Experiment

Hydrogen peroxide/sodium thiosulfate batch kinetics

  DETAILED OVERVIEW:   In this experiment water flows from a 20 liter polycarbonate tank to a centrifugal pump or a gear pump.  The pumps are belt-driven by a variable speed DC motor mounted on ball bearings.  An arm on the motor bears on a load cell connected to a panel meter, and this allows the torque (and thus power) to be measured.  A stainless pressure transducer driving a panel meter indicates the pump discharge pressure.  Water discharged from the pump passes through an orifice/differential pressure cell combination, through a rotameter, and then through a turbine meter.  Water leaving the turbine meter flows to an upper 20 liter tank, and returns through a ball valve to the lower tank. 

Closing the ball valve allows an absolute measurement of flow rate by timing the rate a change of level in either tank.  Students calculate the pump efficiency as a function of RPM from the torque/RPM and flow rate/discharge pressure data, and also calibrate the orifice, turbine meter, and rotameter over a range of flow rates.  Space is available to add as options other flow meters such as vortex or ultrasound meters.  Water can be replaced by a more viscous fluid such as a solution of corn syrup or glycerine, or a light oil.

Please contact us at spencer@columbia.edu for more details on the experiment, and for price and delivery.


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