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Numerical Evaluation of a Micro Gas Turbine Range Extender Vehicle in Worldwide Harmonized Light Vehicles Test Cycle (WLTC) Scenarios
- Oliver Kislat - Institute of Combustion Technology, German Aerospace Center (DLR), Germany ,
- Jan Zanger - Institute of Combustion Technology, German Aerospace Center (DLR), Germany ,
- Thomas Krummrein - Institute of Combustion Technology, German Aerospace Center (DLR), Germany ,
- Peter Kutne - Institute of Combustion Technology, German Aerospace Center (DLR), Germany ,
- Manfred Aigner - Institute of Combustion Technology, German Aerospace Center (DLR), Germany
Journal Article
14-12-02-0008
ISSN: 2691-3747, e-ISSN: 2691-3755
Sector:
Citation:
Kislat, O., Zanger, J., Krummrein, T., Kutne, P. et al., "Numerical Evaluation of a Micro Gas Turbine Range Extender Vehicle in Worldwide Harmonized Light Vehicles Test Cycle (WLTC) Scenarios," SAE Int. J. Elec. Veh. 12(2):157-171, 2023, https://doi.org/10.4271/14-12-02-0008.
Language:
English
Abstract:
The idea of using a Micro Gas Turbine (MGT) as range extender for Hybrid Electric
Vehicles (HEVs) is discussed in the literature for several years now. It is
regarded from an experimental as well as from a numerical point of view, both
indicating superior exhaust gas emissions and performance compared to piston
engines. This is commonly shown by applying a series of consecutive New European
Drive Cycles (NEDC). In 2017, however, the new approval procedure Worldwide
harmonized Light vehicles Test Procedure (WLTP) was introduced with a more
realistic drive cycle and also a specific test procedure for HEVs. In this work,
a drive cycle simulator is set up considering the essential vehicle components
and incorporating a detailed model of the MGT steady-state as well as transient
emission and performance behavior. The WLTP is applied to an MGT range-extended
HEV considering different operating strategies and vehicle configurations.
Further, a procedure depleting a fully charged battery and a full fuel tank
based on the Worldwide harmonized Light vehicles Test Cycle (WLTC) is carried
out in comparison. The evaluation of the different operation concepts and
missions shows very low exhaust gas emissions. A clear relationship exists
between the MGT load variations and the HEV emission behavior and efficiency. It
also shows that there are significant differences in the results if either the
official WLTP or the custom full-range mission is applied. These findings
illuminate if the regarded procedures are suited to evaluate this range extender
configuration and also provide information on future optimization targets for
MGT HEVs.