Browsing by Author "Özdemir, Enver Doruk"

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    Entwicklungsstand und Perspektiven der Elektromobilität : Endbericht
    (2009) Blesl, Markus; Bruchof, David; Hartmann, Niklas; Özdemir, Enver Doruk; Fahl, Ulrich; Eltrop, Ludger; Voß, Alfred
    Im Rahmen dieser Studie wird untersucht, inwiefern die verschiedenen denkbaren Antriebsvarianten aus dem Bereich der Elektromobilität einen ökonomisch und ökologisch sinnvollen Beitrag zur Senkung der Erdölabhängigkeit und zur Reduzierung der Emissionen des Verkehrssektors leisten können. Die Studie beginnt zunächst mit einer technischen Beschreibung der verschiedenen Varianten elektrischer und hybrid-elektrischer Fahrzeugantriebe im PKW-Bereich. Anschließend folgt eine Analyse der derzeitigen spezifischen Kosten einzelner Antriebskomponenten, sowie des jeweiligen mittel- bis langfristigen Potenzials zur Kostenreduktion. Auf Basis dieser Ergebnisse werden die Mobilitätskosten der einzelnen elektromobilen Antriebsalternativen für verschiedene Nutzerprofile und Fahrzeugklassen ermittelt und durch den Vergleich mit konventionellen Referenzfahrzeugen bewertet. Des Weiteren werden auch die heutigen und zukünftigen Emissionen der einzelnen Antriebsalternativen im Fahrbetrieb (Tank-to-Wheel) und bei der Kraftstoffherstellung (Well-to-Tank) sowie die resultierenden CO2-Vermeidungskosten in Relation zum Referenzfahrzeug für verschiedene Nutzerprofile verglichen. Weitere Aspekte der Elektromobilität, die im Rahmen dieser Studie diskutiert werden, sind Infrastrukturanforderungen, die sich bei der Nutzung von Strom und Wasserstoff als Kraftstoff im PKW-Verkehr ergeben, sowie die Potenziale der Nutzung Batterie betriebener Elektrofahrzeuge zu Lastmanagement und Primärregelung.
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    The future role of alternative powertrains and fuels in the German transport sector : a model based scenario analysis with respect to technical, economic and environmental aspects with a focus on road transport
    (2012) Özdemir, Enver Doruk; Voß, A. (Prof. Dr.-Ing.)
    The transport sector is facing the challenges of satisfying the ever increasing transport demand on the one hand and achieving greenhouse gas (GHG) emission reduction targets without compromising economic development on the other hand. There are various alternative fuels and powertrains which might play a role in the future of the German transport sector. Amongst these options, biofuels are considered to help lower GHG emissions. However, they are severely criticized to create an additional strain for the energy system and particularly for the transport sector with land area requirement for energy crop production, which may imply a competition with food production. This study aims to assess the future role of alternative fuels and powertrains in the German transport sector in terms of their costs, efficiencies, GHG emissions and land area requirement for energy crops. To fulfill this aim, a techno-economic analysis of all relevant fuels and powertrain options was performed and a model based approach was employed. The utilized model belongs to the TIMES (The Integrated MARKAL EFOM System) family and is a bottom-up linear cost optimization energy system model. A scenario analysis was employed in order to assess the effect of different technological, economic, environmental and political conditions on the overall system. The results of the scenario analysis indicated that the transport system will still be dominated by conventional powertrains in 2030. Alternative powertrains are projected to play only a secondary role until 2030. It is not expected that fuel cell or battery electric passenger cars will be introduced into the market until 2030 in Germany. Nevertheless, hybrid electric powertrains have to be used in the German passenger car sector under ambitious GHG emission reduction targets and high oil prices. The introduction of alternative powertrains (such as hybrid electric and fuel cell powertrain) is much more likely in the bus sector (especially for public buses) than in passenger cars or in the road freight sector. Furthermore conventional fuels are expected to remain an important part of the German transport system until 2030. However, not only conventional fuels will be utilized in the future, but also biofuels and hydrogen are required. It is concluded that the transport sector should not be the first sector to reduce GHG emissions within an overall GHG emission mitigation strategy. However, with the ambitious GHG emission reduction targets (such as self-commitment of the German government) some contributions should also come from the transport sector.