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Detailed experimental content

Determining the performance of different types of pumps at constant speed by producing a set of characteristic curves:

- Understanding the difference between rotodynamic pumps and positive displacement pumps
- Understanding the effect of system resistance
- Determining the effect of speed on the performance of pumps
- Investigating the effect of suction losses on a centrifugal pump
- Demonstrating the effect of running two centrifugal pumps in series and parallel

Rotodynamic pumps
Centrifugal Pump

- To investigate the performance characteristics of a centrifugal pump
- To explore the following characteristic curves for a centrifugal pump
- Total head produced by the pump against discharge volume flow rate
- Power input to the pump against discharge volume flow rate
- Hydraulic power against discharge volume flow rate
- Overall efficiency of the pump against discharge volume flow rate

Axial Flow Pump

- To investigate the performance of an axial flow pump
- To explore the following characteristic curves for an axial pump
- Total head produced by the pump against discharge volume flow rate
- Power input to the pump against discharge volume flow rate
- Hydraulic power against discharge volume flow rate
- Overall pump efficiency against discharge volume flow rate

Turbine Pump

- To investigate the performance of a turbine pump
- To explore the following characteristic curves for a turbine pump
- Power input to the pump against discharge flow rate
- Hydraulic power against discharge volume flow rate
- Overall pump efficiency against discharge flow rate

Series and Parallel Pumps

- To investigate the performance of two similar Centrifugal pumps when connected and operated in Series and in Parallel.
- Total head against Volume Flow rate
- Power Input against Volume Flow rate
- Hydraulic Power against Volume Flow rate
- Overall efficiency against Volume Flow rate

Positive Displacement Pump
Gear Pump

- To investigate the performance characteristics of a gear pump
- To explore the following characteristic curves for a gear pump
- Discharge volume flow rate against total head
- Power input to the pump against total head
- Hydraulic power against total head
- Overall pump efficiency against total head

Flexible Impeller Pump

- To investigate the performance of a flexible impeller pump
- Explore the following characteristic curves for a flexible impeller pump
- Total head against discharge volume flow rate
- Power input to the pump against discharge volume flow rate
- Overall pump efficiency against discharge volume flow rate
- Volumetric pump efficiency against discharge volume flow rate

Diaphragm pump

- To investigate the performance of a diaphragm pump
- To explore the following characteristic curves for a diaphragm pump
- Volume flow rate against peak outlet pressure
- Power input to the pump against peak outlet pressure
- Pump volumetric efficiency against peak outlet pressure

Plunger Pump (Piston Pump)

- To investigate the performance of a plunger pump
- To explore the following characteristic curves for a plunger pump
- Volume flow rate against peak outlet pressure
- Power input to the pump against peak outlet pressure
- Pump volumetric efficiency against peak outlet pressure

Description
The Armfeld Multi-Pump Test Rig can accommodate both rotodynamic and positive displacement pumps and is supplied with the most common
example of each type as standard (ie a centrifugal pump and a gear pump).
A range of other pump types are available as accessories (including axial, turbine, ?exible impeller, diaphragm and plunger,
plus a second centrifugal pump for series/parallel demonstrations).
Up to four pumps can be accommodated simultaneously within the rig for use within a single laboratory period and each can be run without
disconnecting any pipework or connections. Further pumps can also be easily interchanged.
Each pump accessory comes on its own baseplate, assembled complete with all pipes, valves and fttings to enable it to be easily ftted to the
C3-MKII. Di?erent types of ftting are used for di?erent positions in order to help prevent incorrect ftting.
This new system benefts from electronic instrumentation, control and data logging using a PC (not supplied) and the use of a sensorless vector
drive to accurately determine the torque provided by the drive motors.
As an option, the unit can be ftted with two identical centrifugal pumps to enable simple series/parallel pump confgurations to be demonstrated.

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