Sökning: "transportation fuel"

Visar resultat 16 - 20 av 185 avhandlingar innehållade orden transportation fuel.

  1. 16. Cost-effective fuel choices in the transportation sector under stringent CO2-emission reduction targets - Global energy systems modelling

    Författare :Maria Grahn; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Global energy systems; carbon dioxide emissions; biomass; liquid biofuels; primary energy price; transportation sector; hydrogen; carbon tax; energy scenarios;

    Sammanfattning : This thesis analyzes the worlds future energy supply in general, and cost-effective fuel choices in the transportation sector in particular, under stringent CO2 constraints. The analysis is carried out with the help of a global energy systems model (GET), developed and modified specifically for each project. LÄS MER

  3. 17. Improving Wood Fuel Pellets for Household Use : Perspectives on Quality, Efficiency and Environment

    Författare :Magnus Ståhl; Bengt Månsson; Johan Vinterbäck; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wood fuel pellets; sawdust; drying; pellet production; recirculation; quality; efficency; environment; Miljö- och energisystem; Environmental and Energy Systems;

    Sammanfattning : Bioenergy is one of many contributors to reducing the use of fossil fuels in order to mitigate climate change by decreasing CO2-emissions, and the potential for biofuels are large. The wood fuel pellets are a refined biofuel made of sawdust, which is dried and compressed to achieve improved fuel and transportation properties. LÄS MER

  4. 18. Innovations in nanomaterials for proton exchange membrane fuel cells

    Författare :Robin Sandström; Thomas Wågberg; Ludvig Edman; Florian Nitze; Licheng Sun; Umeå universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Fuel Cells; Membrane Electrode Assembly; Oxygen Reduction Reaction; Platinum alloy catalyst; Nanoparticles; Gas Diffusion Electrode; Proton Exchange Membrane; Materials Science; materialvetenskap; fasta tillståndets fysik; Solid State Physics;

    Sammanfattning : Hydrogen technologies are rapidly receiving increased attention as it offers a renewable energy alternative to the current petroleum-based fuel infrastructure, considering that continued large-scale use of such fossil fuels will lead to disastrous impacts on our environment. The proton exchange membrane fuel cell should play a significant role in a hydrogen economy since it enables convenient and direct conversion of hydrogen into electricity, thus allowing the use of hydrogen in applications particularly suited for the transportation industry. LÄS MER

  5. 19. Optimal Speed and Powertrain Control of a Heavy-Duty Vehicle in Urban Driving

    Författare :Manne Held; Jonas Mårtensson; Jonas Fredriksson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Autonomous vehicles; model predictive control; optimal control; heavy-duty vehicles; trucks; powertrain control; fuel; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : A major challenge in the transportation industry is how to reduce the emissions of greenhouse gases. One way of achieving this in vehicles is to drive more fuel-efficiently. LÄS MER

  7. 20. An Ontology-Based Platform for Information Integration : Supporting Sustainable Smart Transportation Infrastructure

    Författare :Wiebke Belitz-Hellwich; Nicole Kringos; Annika Gram; Romain Balieu; Vangelis Angelakis; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Ontology; Semantic Web; Interoperability; Information Integration; Logistics; Simulation; Smart Port; ontologi; semantisk webb; interoperabilitet; informationsintegration; logistik; simulering; smart hamn.; Bro- och stålbyggnad; Structural Engineering and Bridges;

    Sammanfattning : Transportation and transportation infrastructure are major contributors to global emissions. Even though most of these emissions can be attributed to fuel consumption of vehicles, some of it is due to pavement construction and maintenance. LÄS MER