Sökning: "fuel cell vehicle"

Visar resultat 16 - 20 av 22 avhandlingar innehållade orden fuel cell vehicle.

  1. 16. On Infinite-Horizon State-Constrained Optimal Control - With Application to a Fuel Cell APU

    Författare :Per Rutquist; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis presents a method for computation of optimal control policies for state-constrained, time continuous, infinite-horizon systems. It is applicable to input-affine systems where the stochastic contribution can be modeled as a vector of white noise signals that is added to the control input, with the intensity of the noise being inversely proportional to the control cost. LÄS MER

  3. 17. Kinetic modeling of autothermal reforming of heptane for a fuel cell - auxiliary power unit

    Författare :Mattias Modén; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Heptane; Keywords: Steam reforming; Kinetic modeling; Oxidation; Autothermal reforming; FC-APU;

    Sammanfattning : AbstractThe transport sector contributes significantly to the increasing amounts of air pollution. The pollution from idling heavy duty vehicles can be reduced by using a fuel cell auxiliary power unit (FC-APU) that supplies the vehicle with electricity. This licentiate thesis deals with production of hydrogen, which feeds the fuel cell. LÄS MER

  4. 18. Modeling and Model-based Control of Automotive Air Paths

    Författare :Robin Holmbom; Lars Eriksson; Daniel Jung; Christopher Onder; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The strive towards cleaner and more efficient combustion engines, driven by legislation and cost, introduces new configurations, as exhaust gas recirculation, turbocharging, and variable valve timing, to name a few. Beside all the positive effects on the emissions and fuel consumption, they all affect the air-charge system, which increases the cross-couplings within the air-path control, making it an even more complex system to control. LÄS MER

  5. 19. The role of methane and hydrogen in a fossil-free Swedish transport sector

    Författare :Mårten Larsson; Per Alvfors; Stefan Grönkvist; Max Åhman; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; renewable transport fuels; biogas; methane; hydrogen; electrofuels; pyrolysis; well to wheel; transport policy; energy policy; Chemical Engineering; Kemiteknik;

    Sammanfattning : Drastic reductions of greenhouse gas emissions are required to limit the severe risks associated with a changing climate. One measure is to disrupt the fossil-fuel dependency in the transport sector, but it appears difficult and costly in comparison to other measures. LÄS MER

  7. 20. On design and analysis of synchronous permanent magnet machines for field-weakening operation in hybrid electric vehicles

    Författare :Freddy Magnussen; Chandur Sadarangani; Barrie Mecrow; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Applied mechanics; permanent magnet machines; field-weakening; hybrid electric vehicles; soft magnetic composites; fractional pitch concentrated windings; Teknisk mekanik; Engineering mechanics; Teknisk mekanik;

    Sammanfattning : A regular vehicle of today is equipped with an internal combustion engine that runs on either gasoline or diesel, which are fossil fuels from oil reserves that are millions of years old. In all types of combustion processes carbon dioxide and several other emissions are produced. LÄS MER