Sökning: "Solid oxide fuel cell"

Visar resultat 1 - 5 av 37 avhandlingar innehållade orden Solid oxide fuel cell.

  1. 1. Point defects and ion conduction in solid oxides: a first-principles case study of La2Zr2O7

    Författare :Joakim Nyman; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; proton; self compensation; hydrogen economy; DFT; La2Zr2O7; acceptor doping; lanthanum zirconate; oxygen vacancy; SOFC; pyrochlore; point defect; trapping; computational methods; solid oxide; charge compensation; first principles; ion conduction; solid oxide fuel cell; ceramic electrolyte; defect cluster; fuel cell; hydrogen;

    Sammanfattning : In the endeavor to attain a clean environment and sustainable energy consumption, the notion of a future hydrogen economy stands out as one of the grandest visions. Striving for this vision, a critical task lies in optimizing the performance of the fuel-cell devices responsible for extracting electric power from the energy stored in hydrogen molecules. LÄS MER

  2. 2. Dynamic Solid Oxide Fuel Cell Modelling for Non-steady State Simulation of System Applications

    Detta är en avhandling från Faculty of Engineering, LTH Department of Energy Sciences Division of Thermal Power Engineering

    Författare :Miriam Kemm; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; termodynamik; applied thermodynamics; Termisk teknik; Transient analysis; Technological sciences; Teknik; Energy research; Energiforskning; Thermal engineering; Thermal stress; Solid Oxide Fuel Cell; Fuel cell modelling;

    Sammanfattning : Most of the world's energy generation is based on fossil fuels such as coal and oil, which already today but even more in the future, will cause various problems. One issue is their limited availability, which stands in conflict to the increasing global energy consumption. LÄS MER

  3. 3. Dual-ion Conducting Nanocompoiste for Low Temperature Solid Oxide Fuel Cell

    Detta är en avhandling från Faculty of Engineering, LTH Department of Energy Sciences Division of Thermal Power Engineering

    Författare :Xiaodi Wang; Mamoun Muhammed; Zhu Bin; Peter Lund; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fuel cell; Nano; Composite; Conducting; Electrolyte; SRA - Energy; SRA - Energi;

    Sammanfattning : Solid oxide fuel cells (SOFCs) are considered as one of the most promising power generation technologies due to their high energy conversion efficiency, fuel flexibility and reduced pollution. There is a broad interest in reducing the operating temperature of SOFCs. LÄS MER

  4. 4. Thermodynamic Modelling and Performance of Combined Solid Oxide Fuel Cell and Gas Turbine Systems

    Detta är en avhandling från Department of Heat and Power Engineering, Lund university

    Författare :Jens Pålsson; [2002]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vakuumteknik; vibrationer; akustik; Motors and propulsion systems; Motorer; framdrivningssystem; Gases; fluid dynamics; plasmas; plasma; hydraulik; Maskinteknik; vibration and acoustic engineering; hydraulics; vacuum technology; Modelling; Mechanical engineering; Solid oxide fuel cell; Hybrid system; Gaser; fluiddynamik;

    Sammanfattning : Solid oxide fuel cells (SOFCs) are a ceramic type of fuel cell operating at elevated temperatures. By utilising the thermal energy from the SOFC in a heat engine, a hybrid cycle with high performance can be achieved. One promising concept is a pressurised SOFC in combination with a recuperated gas turbine cycle. LÄS MER

  5. 5. Functional nanocomposites for advanced fuel cell technology and polygeneration

    Detta är en avhandling från Department of Heat and Power Engineering, Lund university

    Författare :Rizwan Raza; Bin Zhu; Torsten Fransson; Mahmut D. MAT; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polygeneration; advanced fuel cell; functional materials; ceria-carbonate nanocomposites; multi-fuelled; electrolyte free fuel cell; SRA - Energy; SRA - Energi;

    Sammanfattning : In recent decades, the use of fossil fuels has increased exponentially with a corresponding sharp increase in the pollution of the environment. The need for clean and sustainable technologies for the generation of power with reduced or zero environment impact has become critical. LÄS MER