TY  - CHAP
A1  - Schopen, Oliver
A1  - Kemper, Hans
A1  - Esch, Thomas
T1  - Development of a comparison methodology and evaluation matrix for electrically driven compressors in ICE and FC
T2  - Proceedings of the 1st UNITED – Southeast Asia Automotive Interest Group (SAIG) International Conference
N2  - In addition to electromobility and alternative drive systems, a focus is set on electrically driven compressors (EDC), with a high potential for increasing the efficiency of internal combustion engines (ICE) and fuel cells [01]. The primary objective is to increase the ICE torque, provided independently of the ICE speed by compressing the intake air and consequently the ICE filling level supported by the compressor. For operation independent from the ICE speed, the EDC compressor is decoupled from the turbine by using an electric compressor motor (CM) instead of the turbine. ICE performances can be increased by the use of EDC where individual compressor parameters are adapted to the respective application area [02] [03]. This task contains great challenges, increased by demands with regard to pollutant reduction while maintaining constant performance and reduced fuel consumption. The FH-Aachen is equipped with an EDC test bench which enables EDC-investigations in various configurations and operating modes. Characteristic properties of different compressors can be determined, which build the basis for a comparison methodology. Subject of this project is the development of a comparison methodology for EDC with an associated evaluation method and a defined overall evaluation method. For the application of this comparison methodology, corresponding series of measurements are carried out on the EDC test bench using an appropriate test device.
KW  - electro mobility
KW  - fuel cell
KW  - internal combustion engine
KW  - electrically driven compressors
Y1  - 2021
SN  - 978-3-902103-94-9
N1  - 1st UNITED-SAIG International Conference, 21-22 APR 2021, Chulalongkorn University, Thailand
SP  - 45
EP  - 46
PB  - FH Joanneum
CY  - Graz
ER  - 
TY  - JOUR
A1  - Bung, Daniel Bernhard
T1  - Extreme flooding in Western Germany: some thoughts on hazards, return periods and risk
JF  - Hydrolink
N2  - The low-pressure system Bernd involved extreme rainfalls in the Western part of Germany in July 2021,
resulting in major floods, severe damages and a tremendous number of casualties. Such extreme events
are rare and full flood protection can never be ensured with reasonable financial means. But still, this
event must be starting point to reconsider current design concepts. This article aims at sharing some
thoughts on potential hazards, the selection of return periods and remaining risk with the focus on Germany.
Y1  - 2021
IS  - 4
SP  - 108
EP  - 113
PB  - International Association for Hydro-Environment Engineering and Research (IAHR)
CY  - Madrid
ER  - 
TY  - JOUR
A1  - Saretzki, Charlotte
A1  - Bergmann, Ole
A1  - Dahmann, Peter
A1  - Janser, Frank
A1  - Keimer, Jona
A1  - Machado, Patricia
A1  - Morrison, Audry
A1  - Page, Henry
A1  - Pluta, Emil
A1  - Stübing, Felix
A1  - Küpper, Thomas
T1  - Are small airplanes safe with regards to COVID-19 transmission?
JF  - Journal of Travel Medicine
Y1  - 2021
U6  - https://doi.org/10.1093/jtm/taab105
SN  - 1708-8305
VL  - 28
IS  - 7
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - GEN
A1  - Mayntz, Joscha
A1  - Keimer, Jona
A1  - Tegtmeyer, Philipp
A1  - Dahmann, Peter
A1  - Hille, Sebastian
A1  - Stumpf, Eike
A1  - Fisher, Alex
A1  - Dorrington, Graham
T1  - Aerodynamic Investigation on Efficient Inflight Transition of a Propeller from Propulsion to Regeneration Mode
T2  - AIAA SCITECH 2022 Forum
N2  - This paper discusses a new way of inflight power regeneration for electric or hybrid-electric driven general aviation aircraft with one powertrain for both configurations. Three different approaches for the shift from propulsion to regeneration mode are analyzed. Numerical cal-culation and wind tunnel results are compared and show the highest regeneration potential for the "Windmill" approach, where the propeller blades are flipped, and rotation is reversed. A combination of all regeneration approaches for a realistic flight mission is discussed.
Y1  - 2021
U6  - https://doi.org/10.2514/6.2022-0546
N1  - AIAA SCITECH 2022 Forum, January 3-7, 2022, San Diego, CA & Virtual
PB  - AIAA
CY  - Reston, Va.
ER  -