Axial Compressor as eBooster for charging an Ultra-Lean-Burn Hydrogen Combustion Engine

verfasst von: Yannik Schulz, Joerg R. Seume, Lukas Sagan, Peter Eilts
Abstract: Hydrogen as a fuel in spark-ignition combustion engines provides an opportunity for using an ultra-lean-burn combustion strategy. This combustion concept has the advantage of ensuring a high thermal efficiency as well as ultra-low NOx emissions at the same time. This makes it an interesting concept, especially in the field of commercial vehicles. Providing these high pressure ratios while guaranteeing an acceptable boost pressure is challenging for charging systems. In order to face these requirements, an axial compressor eBooster stage is developed. The eBooster concept extends the operating range of a single-stage turbocharger. Otherwise, a complex and cost intensive two-stage configuration would be needed. The compressor is designed to operate for mass flow rates of 0.4 to 0.8 kg/s and total pressure ratios of up to 1.72. When operating the eBooster stage, the centrifugal compressor performance map is shifted towards higher mass flow rates by means of pre-compression. The compressor developed shows a peak isentropic efficiency of 82.8 % with high efficiencies (>78 %) for the whole operating range.
Organisationseinheit(en): Institut für Turbomaschinen und Fluid-Dynamik
Externe Organisation(en): Technische Universität Braunschweig
Typ: Aufsatz in Konferenzband
Anzahl der Seiten: 12
Publikationsdatum: 19.10.2023
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
Elektronische Version(en): https://doi.org/10.33737/gpps23-tc-056 (Zugang: Offen)

BibTeX

@inproceedings{4cbcd9ea8c4843859456144e4649c354,
title = "Axial Compressor as eBooster for charging an Ultra-Lean-Burn Hydrogen Combustion Engine",
abstract = "Hydrogen as a fuel in spark-ignition combustion engines provides an opportunity for using an ultra-lean-burn combustion strategy. This combustion concept has the advantage of ensuring a high thermal efficiency as well as ultra-low NOx emissions at the same time. This makes it an interesting concept, especially in the field of commercial vehicles. Providing these high pressure ratios while guaranteeing an acceptable boost pressure is challenging for charging systems. In order to face these requirements, an axial compressor eBooster stage is developed. The eBooster concept extends the operating range of a single-stage turbocharger. Otherwise, a complex and cost intensive two-stage configuration would be needed. The compressor is designed to operate for mass flow rates of 0.4 to 0.8 kg/s and total pressure ratios of up to 1.72. When operating the eBooster stage, the centrifugal compressor performance map is shifted towards higher mass flow rates by means of pre-compression. The compressor developed shows a peak isentropic efficiency of 82.8 % with high efficiencies (>78 %) for the whole operating range.",
author = "Yannik Schulz and Seume, {Joerg R.} and Lukas Sagan and Peter Eilts",
year = "2023",
month = oct,
day = "19",
doi = "10.33737/gpps23-tc-056",
language = "English",
series = "Proceedings Global Power & Propulsion Society",
publisher = "Global Power and Propulsion Society (GPPS)",
booktitle = "Proceedings of Global Power and Propulsion Society",
note = "GPPS International Technical Conference 2023 (GPPS Hong Kong23), GPPS Hong Kong23 ; Conference date: 17-10-2023 Through 19-10-2023",
url = "https://gpps.global/gpps-tc23/",
}