Numerical Invstigation Of A Radial Turbine With Variable Nozzle Geometry For Fuel Cell Systems In Automotive Applications
Abstract
In automotive fuel cell drives, electrically driven turbochargers are used to increase system pressure and improve efficiency. Due to the low operating temperature of the polymer electrolyte membrane fuel cell (PEMFC) and the resulting low exhaust gas temperature, the turbine power is not sufficient to drive the compressor. Thus, this paper investigate the potential of efficiency increase when using variable turbine geometries in an experimentally validated numerical study. The variable geometries are analysed in detail. The results of the investigation are compared to the results of a non-variable turbocharger version. The numerical study shows that the use of variable turbine geometries is beneficial in PEMFC air supply systems since the operating range enhancement leads to better coverage of the operating line. In addition, the variable nozzle turbine results in improved efficiency at higher pressure ratios.
Details
- Organisationseinheit(en)
-
Institut für Turbomaschinen und Fluid-Dynamik
- Typ
- Beitrag in Buch/Sammelwerk
- Anzahl der Seiten
- 11
- Publikationsdatum
- 2021
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Maschinenbau, Werkstoffmechanik, Physik der kondensierten Materie
- Elektronische Version(en)
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https://doi.org/10.29008/ETC2021-748 (Zugang:
Offen
)
