Systèmes à cogénération d'électricité et de chaleur avec piles à combustible de type PEMFC ou SOFC et vaporeformage externe

Abstract : The objectives of this PhD work concern the energy management in combined heat and power (CHP or cogeneration) systems using fuel cells and fed by natural gas. Firstly, we define the theoretical and effective efficiencies of such systems. Secondly, we study in a detailed way the operation of H-Power CHP units with a low temperature proton exchange membrane fuel cell (PEMFC) and steam reformer. We develop a model able to simulate the operation of the units in different conditions. We propose improvements that could lead to an electric efficiency increase by 3 to 10 percentage points. Finally, we compare these units with CHP systems using solid oxide fuel cell (SOFC) fed by natural gas. The high temperature fuel cell generates enough heat to ensure both the thermal conditioning of gases and the reforming of natural gas. We propose and study five hybrid system designs in order to value the thermal and chemical residual energies and to convert them mostly in supplementary electric energy.
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Mihai Nicolae Radulescu. Systèmes à cogénération d'électricité et de chaleur avec piles à combustible de type PEMFC ou SOFC et vaporeformage externe. Autre. Université Henri Poincaré - Nancy 1, 2006. Français. ⟨NNT : 2006NAN10095⟩. ⟨tel-01754318⟩

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