Sökning: "fuel cell system"

Visar resultat 1 - 5 av 83 avhandlingar innehållade orden fuel cell system.

  1. 1. On direct hydrogen fuel cell vehicles modelling and demonstration

    Detta är en avhandling från Stockholm : KTH

    Författare :Kristina Haraldsson; KTH.; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical engineering; direct hydrogen; Proton Exchange Membrane; PEM; fuel cell; fuel cell vehicle; fuel cell hybrid vehicles; on-board hydrogen storage; Kemiteknik; TECHNOLOGY Chemical engineering; TEKNIKVETENSKAP Kemiteknik;

    Sammanfattning : In this thesis, direct hydrogen Proton Exchange Membrane (PEM) fuel cell systems in vehicles are investigated through modelling, field tests and public acceptance surveys.A computer model of a 50 kW PEM fuel cell system was developed. The fuel cell system efficiency is approximately 50% between 10 and 45% of the rated power. LÄS MER

  2. 2. System Studies of Fuel Cell Power Plants

    Detta är en avhandling från Stockholm : Kemiteknik

    Författare :Timo Kivisaari; KTH.; [2001]
    Nyckelord :fuel cell; power pant; system studies;

    Sammanfattning : This thesis concerns system studies of power plants wheredifferent types of fuel cells accomplish most of the energyconversion.Ever since William Grove observed the fuel cell effect inthe late 1830s fuel cells have been the subject or more or lessintense research and development. LÄS MER

  3. 3. Design and evaluation of stationary polymer electrolyte fuel cell systems

    Detta är en avhandling från Stockholm : Kemiteknik

    Författare :Cecilia Wallmark; KTH.; [2004]
    Nyckelord :Small-scale; stationary; fuel cell system; polymer electrolyte fuel cell; PEFC system; reformer; thermodynamic modelling; pinch technology; exergy analyses; system configuration; test facility; experiments; application; simulation; installation; ener;

    Sammanfattning : The objectives of this doctoral thesis are to give a basisincluding methods for the development of stationary polymerelectrolyte fuel cell (PEFC) systems for combined heat andpower production. Moreover, the objectives include identifyingprerequisites, requirements and possibilities for PEFC systemsproducing heat and power for buildings in Sweden. LÄS MER

  4. 4. Bringing fuel cells to reality and reality to fuel cells A systems perspective on the use of fuel cells

    Detta är en avhandling från Stockholm : KTH

    Författare :Maria Saxe; KTH.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Assessment; CUTE; Demonstration projects; Emerging technology; Evaluation; Fuel cell buses; Fuel cell systems; Fuel cells; Hype; Interdisciplinary; Niche markets; PEM; Radical technologies; SOFC; Strategic niche markets; Sustainability; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering Chemical energy engineering; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik Kemisk energiteknik;

    Sammanfattning : With growing awareness of global warming and fear of political instability caused by oil depletion, the need for a society with a sustainable energy system has been brought to the fore. A promising technology often mentioned as a key component in such a system is the fuel cell technology, i.e. LÄS MER

  5. 5. Fuel Cells and Biogas

    Detta är en avhandling från Stockholm : KTH

    Författare :Lars Hedström; KTH.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; air bleed; biogas; carbon dioxide; carbon monoxide; current distribution; dilution; efficiency; energy conversion; energy systems; experimental; fuel cell; fuel cell systems; PEFC; poisoning; reformate; SOFC; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering Chemical energy engineering; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik Kemisk energiteknik;

    Sammanfattning : This thesis concerns biogas-operated fuel cells. Fuel cell technology may contribute to more efficient energy use, reduce emissions and also perhaps revolutionize current energy systems. The technology is, however, still immature and has not yet been implemented as dominant in any application or niche market. LÄS MER