Sökning: "polymer electrolyte fuel cell"
Visar resultat 16 - 20 av 45 avhandlingar innehållade orden polymer electrolyte fuel cell.
16. Development and characterisation of the components of the polymer electrolyte fuel cell
Sammanfattning : .... LÄS MER
17. Rhodium diesel-reforming catalysts for fuel cell applications
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
18. Modelling and Experimental Investigation of the Dynamics in Polymer Electrolyte Fuel Cells
Sammanfattning : In polymer electrolyte fuel cells (PEFC) chemical energy, in for example hydrogen, is converted by an electrochemical process into electrical energy. The PEFC has a working temperature generally below 100 °C. Under these conditions water management and transport of oxygen to the cathode are the parameters limiting the performance of the PEFC. LÄS MER
19. Modelling and controlling of polymer electrolyte fuel cell systems
Sammanfattning : This thesis focuses on the modelling and controlling of polymer electrolyte fuelcell (PEFC) systems. A system level dynamic PEFC model has been developedto test the system performance (output voltage, reactants gas partial pressures,and stack temperature) for different operating conditions. LÄS MER
20. Thin-Film Electrocatalysts for Polymer Electrolyte Fuel Cells - Activity, Durability and Proton Conduction
Sammanfattning : The polymer electrolyte membrane fuel cell (PEMFC) is a potential technology for future energy conversion in sustainable energy systems. By using hydrogen from renewable energy sources and oxygen from the air, the fuel cell produces electricity with water as the only exhaust. LÄS MER