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Test Bench for Charging and High-Speed Electrical Compressor Systems

Test Bench for Charging and High-Speed Electrical Compressor Systems

Research on exhaust gas turbochargers, charging systems for fuel cells and small electrically driven, high-speed compressor systems is performed at the Institute for Turbomachinery and Fluid Dynamics (TFD). The research is focused on the improvement and advancement of existing applications as well as the development of new components.

Field of Application

Steady and transient performance measurements of:

  • single and dual-flow turbochargers
  • fuel cells charging
  • electrically driven compressor
  • hot gas component tests

Description

For the successful implementation of future research projects, in this new test bench the most up-to-date and highly accurate measuring and control techniques has been combined with the high degree of flexibility of the possible applications. The versatility of the possible fields of application of the test rig requires a modular test stand with a very precisely tuned infrastructure. Therefore, the test bench is equipped with two hot gas generator systems (HGG), a compressor back pressure unit (CBPU) to adjustment of the compressor boost pressure, a conditioning of the lubrication oil (OCU) to control the pressure and temperature conditions in the bearing and a conditioning of the cooling water (WCU) to maintain a uniform input temperature for water-cooled bearing housings.

To vary the operation setting of the turbine over a wide range independently of the compressor, a compressor closed loop Unit (CCLU) is used. The high reproducibility of the operating conditions is the perfect basis for producing reliable measurements and consequently providing thorough and reliable information on the setup or system investigated.

The Test Facility was partly financed by the European Community under an EFRE grant. The Test Facility is located at the Energy Research Centre of Lower Saxony (EFZN) at Goslar.

Picture - Components of the small gas stand Picture - Components of the small gas stand Picture - Components of the small gas stand
Components of the small gas stand
Picture - Instrumentation for the measurement of Floating ring rotational speed Picture - Instrumentation for the measurement of Floating ring rotational speed Picture - Instrumentation for the measurement of Floating ring rotational speed
Instrumentation for the measurement of Floating ring rotational speed
Picture - Turbocharger instrumentation Picture - Turbocharger instrumentation Picture - Turbocharger instrumentation
Turbocharger instrumentation

Measurement Techniques

  • Steady state and unsteady pressure probes
  • Temperature measurement (Type K & Pt100)
  • CTA/CCA probes for velocity vector and turbulence measurement
  • L2F, PIV for flow field measurement
  • Tip-timing system for blade vibration measurement
  • Blow-by measurement system Acceleration sensors for monitoring vibrations
  • Rotordynamic measurements (Eddy-Current Probes)
  • Control and analysis of power electronics

Specifications

Low-Flow Hot Gas Generator

High-Flow Hot Gas Generator
Turbine inlet temperature 40 - 1050 °C40 - 1050 °C
Turbine inlet pressure up to 6 bar (abs.) up to 6 bar (abs.)
Maximum turbine mass flow rate up to 0.3 kg/sup to 0,8 kg/s

Contact

Dipl.-Ing. Henning Rätz
Research Staff
Address
An der Universität 1
30823 Garbsen
Building
Room
218
Dipl.-Ing. Henning Rätz
Research Staff
Address
An der Universität 1
30823 Garbsen
Building
Room
218