Sökning: "auxiliary power unit"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden auxiliary power unit.

  1. 1. Hydrogen Generation for Fuel Cells in Auxiliary Power Systems

    Författare :Marita Nilsson; Lars J. Pettersson; Gunther Kolb; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; autothermal reforming; auxiliary power unit; diesel; dimethyl ether; fuel cell; fuel-flexible reformer; hydrogen; PdZn alloy; reforming catalyst; reformer design; Rh; Chemical engineering; Kemiteknik;

    Sammanfattning : Heavy-duty trucks are in idle operation during long periods of time, providing the vehicles with electricity via the alternator at standstill. Idling trucks contribute to large amounts of emissions and high fuel consumption as a result of the low efficiency from fuel to electricity. LÄS MER

  3. 2. 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. 3. Hydrogen generation from dimethyl ether by autothermal reforming

    Författare :Marita Nilsson; Lars Pettersson; Ann Cornell; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; autothermal reforming; auxiliary power unit; dimethyl ether; fuel cell; hydrogen; palladium; reforming catalyst; temperature-programmed reduction; truck idling; X-ray diffraction; zinc; Chemical engineering; Kemiteknik;

    Sammanfattning : Heavy-duty trucks are in idle operation during long periods of time, providing the vehicles with electricity via the alternator at standstill. Idling trucks contribute to large amounts of emissions and high fuel consumption as a result of the low efficiency from fuel to electricity. LÄS MER

  5. 4. Rhodium diesel-reforming catalysts for fuel cell applications

    Författare :Xanthias Karatzas; Lars J. Pettersson; James Spivey; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Autothermal reforming; auxiliary power unit; BET; chemisorption; diesel; fuel cell; hydrogen; monolith; reforming catalyst; reformer design; Rh; RhPt alloy; TEM; TPO; TPR; XRD; XPS; zone coating; Chemical engineering; Kemiteknik;

    Sammanfattning : Heavy-duty diesel truck engines are routinely idled at standstill to provide cab heating or air conditioning, and in addition to supply electricity to comfort units such as radio and TV. Idling is an inefficient and unfavorable process resulting in increased fuel consumption, increased emissions, shortened engine life, impaired driver rest and health, and elevated noise. LÄS MER

  7. 5. Dynamic Processes and Active Power Control of Hydropower Plants

    Författare :Weijia Yang; Per Norrlund; Torbjørn Kristian Nielsen; Uppsala universitet; []
    Nyckelord :Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Hydro-electricity plays an important role in the safe, stable and efficient operation of electric power systems. Frequency stability of power systems refers to the ability to maintain steady frequency following a severe system upset resulting in a significant imbalance between generation and load. LÄS MER