The experimental unit provides the basic experiments to get to know the operating behaviour and the most important characteristic variables of radial fans.

Features a radial fan with variable speed via a frequency converter, an intake pipe and a delivery pipe. The transparent intake pipe is fitted with guide plates for flow guidance and with a flow straightener to calm the air. This enables precise measurements even with heavily reduced operation. The air flow is adjusted by a throttle valve at the end of the delivery pipe.

Radial fans are used to transport gases with non-excessive pressure differences. The medium is drawn in axially to the drive shaft of the radial fan and is deflected by 90° by the rotation of the rotor and discharged radially.

All the advantages of software-supported experiments with operation and evaluation are offered by the software and the microprocessor.

To demonstrate the effect of different blade shapes two rotors are included in the scope of delivery: one rotor with forward curved blades and one with backward curved blades. The rotors are easily interchangeable.

The experimental unit is fitted with sensors for pressure and temperature. The flow rate is determinated via differential pressure measurement on the intake nozzle. The microprocessor-based measuring technique is well protected in the housing. The measured values are transmitted directly to a PC via USB where they can be analysed using the software included.

Specification:

Transparent intake and delivery pipes

Throttle valve to adjust the air flow in the delivery pipe

Interchangeable rotors: 1 rotor with forward curved blades and 1 rotor with backward curved blades

Determination of flow rate via intake nozzle

Display of differential pressure, flow rate, speed, electrical power consumption and hydraulical power output, temperature and efficiency

Functioning and operating behaviour of a radial fan

Radial fan with 3-phase AC motor

Variable speed via frequency converter

Display and evaluation of the measured values as well as operation of the unit via software

Due to integrated microprocessor-based instrumentation no additional devices with error-prone wiring are required

Software with control functions and data acquisition via USB under Windows 8.1, 10.

Technical data:

Delivery pipe

Inner diameter: 100mm

Length: 530mm

Intake pipe

Inner diameter: 90mm

Length: 430mm

Radial fan

Power consumption: 110W

Nominal speed: 2800min-1

Volumetric flow rate: 480m3/h

Pressure difference: 300Pa

Measuring ranges

Differential pressure: 0…1800Pa

Flow rate: 0…1000m3/h

Temperature: 0…100°C

Speed: 0…3300min-1

Power consumption: 0…250W

230V, 50Hz, 1 phase

230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase

Dimensions and weight

LxWxH: 670x340x940mm

Weight: 20kg.