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HM 450C Characteristic Variables of Hydraulic Turbomachines
Education / GUNT Hamburg / Fluid Mechanics and Hydrology / Hydraulic Fluid Energy Machines /

Turbomachines such as pumps and turbines are energy converters. Turbines convert flow energy into mechanical energy and pumps convert mechanical energy into flow energy.
  HM 450C can be used to investigate a centrifugal pump. Experiments can be performed on two key water turbine designs: Pelton and Francis turbine, available as accessories HM 450.01 and HM 450.02.

  The closed water circuit comprises a tank, a standard centrifugal pump with a speed-controlled drive and a flow control valve to adjust the back pressure.  
  The speed is adjusted by way of the speed-controlled drive. The drive motor is mounted on swivel bearings, so the drive torque can be measured by way of a force sensor, enabling the mechanical drive power output to be determined.
  In experiments, the characteristics at various speeds are plotted. The recorded measured values are displayed digitally and processed on a PC, where the performance data of the turbomachine being investigated is calculated and plotted by characteristic curves.

  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.



Learning Objectives / Experiments

- Measuring intake and delivery pressure
- Determining delivery height
- Determining hydraulic output
- Determining mechanical output
- Pump characteristics at various speeds
- Determining the efficiency of the pump
Additionally with accessories Pelton turbine HM 450.01 and Francis turbine HM 450.02
- Measuring torque and speed

- Determining efficiency of the turbine

- Plotting turbine characteristics


[1] Determining characteristic variables of a centrifugal pump
[2] Determining characteristic variables of water turbines together with the accessories HM 450.01 and Francis turbine HM 450.02

[3] Closed water circuit with pump, motor, flow control valve and tank

[4] Pipes and fittings made of PVC
[5] 3-phase AC motor for pump with speed control via frequency converter
[6] Flow adjustment by flow control valve
[7] Non-contact speed measurement at the turbine shaft and force sensor at the brake for measuring the torque  

[8] Digital display for pressures, flow rate, speed and torque

[9] LabVIEW software for data acquisition via USB under Windows XP or Windows Vista


Technical Data

Pump (standard centrifugal pump)
- max. head: 23,9m 
- max. flow rate: 32m³/h
Drive motor, speed-controlled
- power output: 2,2kW
- speed range: 0...3000min-1
Tank: 250L
Measuring ranges
- pressure: 3x 0...4bar abs.
- flow rate: 0...40m³/h
- torque: 1x 0...9,8Nm, 1x 0...20Nm
- speed: 2x 0...9999min-1


Dimensions and Weight
LxWxH: 1900x790x1900mm
Weight: approx. 230kg
Required for Operation
230V, 50/60Hz, 1 phase or 230V, 60Hz/CSA, 3 phase
Scope of Delivery

1 trainer
1 LabVIEW software CD + USB cable

1 set of instructional material

Order Details

070.450C0  HM 450C  Characteristic Variables of Hydraulic Turbomachines