Sökning: "PEM fuel cells"
Visar resultat 1 - 5 av 18 avhandlingar innehållade orden PEM fuel cells.
1. Bringing fuel cells to reality and reality to fuel cells A systems perspective on the use of fuel cells
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
Sammanfattning : The Polymer Electrolyte Membrane Fuel Cell (PEMFC) is a promising energy converting technology for powering automotives and electrical equipment using hydrogen gas as fuel and producing water as the only exhaust. The active carbon-supported platinum catalyst present in the electrodes limits the maximum power generation in state-of-the-art PEMFCs due to platinum’s poor activity for the oxygen reduction reaction (ORR) taking place at the cathode. LÄS MER
3. Multiphysics modelling of PEM fuel cells - with reacting transport phenomena at micro and macroscales
Sammanfattning : This thesis presents numerical simulations of reacting transport phenomena in polymer electrolyte membrane (PEM) fuel cells. Broadly, the presented work is subdivided into macro and microscale simulations. LÄS MER
- Detta är en avhandling från Stockholm : Kungliga Tekniska högskolan
Sammanfattning : The proton exchange membrane (PEM) fuel cell is an electrochemical device that converts chemical energy into electrical energy through two electrocatalytic reactions. The most common catalyst used is platinum on carbon (Pt/C), which has shown the best performance in the fuel cell until now. LÄS MER
5. Towards sustainable urban transportation Test, demonstration and development of fuel cell and hybrid-electric busesDetta är en avhandling från Stockholm : KTH
Sammanfattning : Several aspects make today’s transport system non-sustainable:• Production, transport and combustion of fossil fuels lead to global and local environmental problems.• Oil dependency in the transport sector may lead to economical and political instability. LÄS MER