Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 15th European Conference on Turbomachinery Fluid dynamics & Thermodynamics |
| Pages | 14 |
| Publication status | Published - 2021 |
| Event | 15th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics 2023, ETC 2023 - Budapest, Hungary Duration: 24 Apr 2023 → 28 Apr 2023 |
Publication series
| Name | European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC |
|---|---|
| ISSN (Print) | 2313-0067 |
| ISSN (electronic) | 2410-4833 |
Abstract
This study presents first-time experimental investigations of an electric turbocharger for the fuel cell air supply with different range-extending features in the centrifugal compressor. Experiments show the potential of pivoting the diffuser vanes: The surge margin of the compressor increases by up to 44.7 percentage points. This can be used to adapt the compressor map to the operating range requirements of an automotive fuel cell. However, due to efficiency losses, the compressor power consumption increases when the fuel cell is operated at full-load. Further experiments with different leading edge angles of the diffuser vanes demonstrate that the map of the centrifugal compressor can be shifted towards lower mass flow rates even by a fixed-geometry diffuser. While the original compressor can only cover 68 percent of the total fuel cell's operating range with a surge margin of 20 percent, a compressor with adapted leading edge angles of the diffuser vanes covers over 75.7 percent. By linearly reducing the leading edge angle over the vane height, the compressor power consumption decreases over the entire operating range of the fuel cell. A reduced power consumption of up to 6.3 percent is achieved at part-load.
Keywords
- CENTRIFUGAL COMPRESSOR, FUEL CELL AIR SUPPLY, OPERATING RANGE EXTENSION, VANED DIFFUSER
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Mechanics of Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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Proceedings of the 15th European Conference on Turbomachinery Fluid dynamics & Thermodynamics. 2021. p. 14 ETC2023-112 (European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Experimentally Validated Improvements Of A Cathode Air Compressor For Pem Fuel Cells By Fixed Diffuser Vanes
AU - Schoedel, M.
AU - Nachtigal, P.
AU - Seume, J. R.
N1 - Funding Information: The investigations presented in this paper are part of the research project ARIEL. The authors thank the Federal Ministry of Transport and Digital Infrastructure (BMVI), which financially supported the work within the framework of the National Innovation Programme (NIP) Hydrogen and Fuel Cell Technology, as well as the NOW GmbH, which coordinated the funding guideline. The authors would also like to acknowledge gratefully the entire project consortium consisting of the Volkswagen AG and all the participating institutes of the University of Braunschweig and the Ostfalia University of Applied Sciences. Finally, the authors would like to thank the FISCHER Fuel Cell Compressor AG for providing the electric turbochargers for the experimental investigations and technical support during the measurement campaigns.
PY - 2021
Y1 - 2021
N2 - This study presents first-time experimental investigations of an electric turbocharger for the fuel cell air supply with different range-extending features in the centrifugal compressor. Experiments show the potential of pivoting the diffuser vanes: The surge margin of the compressor increases by up to 44.7 percentage points. This can be used to adapt the compressor map to the operating range requirements of an automotive fuel cell. However, due to efficiency losses, the compressor power consumption increases when the fuel cell is operated at full-load. Further experiments with different leading edge angles of the diffuser vanes demonstrate that the map of the centrifugal compressor can be shifted towards lower mass flow rates even by a fixed-geometry diffuser. While the original compressor can only cover 68 percent of the total fuel cell's operating range with a surge margin of 20 percent, a compressor with adapted leading edge angles of the diffuser vanes covers over 75.7 percent. By linearly reducing the leading edge angle over the vane height, the compressor power consumption decreases over the entire operating range of the fuel cell. A reduced power consumption of up to 6.3 percent is achieved at part-load.
AB - This study presents first-time experimental investigations of an electric turbocharger for the fuel cell air supply with different range-extending features in the centrifugal compressor. Experiments show the potential of pivoting the diffuser vanes: The surge margin of the compressor increases by up to 44.7 percentage points. This can be used to adapt the compressor map to the operating range requirements of an automotive fuel cell. However, due to efficiency losses, the compressor power consumption increases when the fuel cell is operated at full-load. Further experiments with different leading edge angles of the diffuser vanes demonstrate that the map of the centrifugal compressor can be shifted towards lower mass flow rates even by a fixed-geometry diffuser. While the original compressor can only cover 68 percent of the total fuel cell's operating range with a surge margin of 20 percent, a compressor with adapted leading edge angles of the diffuser vanes covers over 75.7 percent. By linearly reducing the leading edge angle over the vane height, the compressor power consumption decreases over the entire operating range of the fuel cell. A reduced power consumption of up to 6.3 percent is achieved at part-load.
KW - CENTRIFUGAL COMPRESSOR
KW - FUEL CELL AIR SUPPLY
KW - OPERATING RANGE EXTENSION
KW - VANED DIFFUSER
UR - http://www.scopus.com/inward/record.url?scp=85177650318&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85177650318
T3 - European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC
SP - 14
BT - Proceedings of the 15th European Conference on Turbomachinery Fluid dynamics & Thermodynamics
T2 - 15th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics 2023, ETC 2023
Y2 - 24 April 2023 through 28 April 2023
ER -