Radial compressors are used to compress gases. The medium is drawn in axially to the drive shaft by the rotation of the rotor and flows through the rotor rotating at high speed. By means of centrifugal force, the medium is accelerated towards the outer edge and is compressed in this manner.
The experimental unit provides the basic experiments to get to know the operating behaviour and the important characteristic variables of radial compressors.
Features a two-stage radial compressor with variable speed via a frequency converter, an intake pipe and a delivery pipe. The intake and delivery pipes are transparent. A protective plate placed in front of the inlet of the intake pipe prevents larger objects from being drawn in or the clogging of the intake opening. The air flow is adjusted by a throttle valve at the end of the delivery pipe.
The experimental unit is fitted with sensors for pressure, temperature and speed. The flow rate is determinated via differential pressure measurement on the intake nozzle.
The microprocessor-based measuring technique is well protected in the housing. All the advantages of software-supported experiments and evaluation are offered by the software and the microprocessor. The connection to a PC is made by USB.
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
Learning Objectives / Experiments
Operating behaviour and characteristic variables of a radial compressor
Recording of the compressor curve for both stages
Effect of the rotor speed on the pressure
Effect of the rotor speed on the flow rate
Distribution of stage pressure ratios
Effect of compression on the temperature increase
Determination of hydraulical power output and efficiencies
Specification
Functioning and operating behaviour of a radial compressor
Two-stage radial compressor with drive motor
Variable speed via frequency converter
Transparent intake and delivery pipes
Throttle valve for adjusting the air flow in the delivery pipe
Protecting plate at air inlet for undisturbed air flow
Determination of flow rate via intake nozzle
Display of differential pressures, flow rate, speed, electrical power consumption and hydraulical power output, temperatures and efficiency
Microprocessor-based measuring technique
Unit-specific software for data acquisition and operation via USB under Windows Vista or Windows 7