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Biogas as a fuel source for SOFC Cogenerators

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Turbulence in cooling channels of rocket engines: Large Eddy Simulations

The aim of this Note is to predict by means of large eddy simulations the three-dimensional structures and secondary mass and heat fluxes which develop within a heated curved duct, for applications to rocket engines cooling channels. We show the existence ...

2005

Optimal Design and Operation of Micro-Power Generation Processes

Benoît Chachuat

This paper presents the optimal design and operation of a micro power generation process that consists of a reactor, a solid-oxide fuel cell (SOFC) and two burners in a stack fed with ammonia and butane fuels. Hydrogen is produced from ammonia decompositio ...

2004

Fuels for Fuel Cells : Requirements and Fuel Processing

Jan Van Herle, Frédéric Vogel

Polymer electrolyte and solid oxide are the two fuel cell types (PEFC, SOFC) under development in Switzerland. The very distinct operating temperatures of 80 °C (PEFC) and 800–950 °C (SOFC) impose fundamentally different requirements upon the nature of the ...

2004

Process flow model of solid oxide fuel cell system supplied with sewage biogas

François Maréchal, Daniel Favrat, Jan Van Herle

A model for a 1000 kW class solid oxide fuel cell (SOFC) system running on biogas from a sewage sludge digestion plant was implemented in a process flow scheme using external steam reforming. The model stack consisted of planar anode supported cells operat ...

Elsevier2004

A heat piloted 5 kW fuel cell

François Maréchal, Sébastien Lerson

Micro-cogeneration in residential applications is one of the efficient ways of improving the energy conversion efficiency in buildings. Cogeneration systems will cover electrical and thermal needs while reducing both energy bills and CO2 emissions. Thanks ...

2004

CFD simulation tool for solid oxide fuel cells

Daniel Favrat, Jan Van Herle, Nordahl Autissier, Diego Larrain

A 3D simulation tool for solid oxide fuel cells is presented. The aim of this work is to predict current density, flow, temperature and concentration fields in order to compare and optimize repeat element geometry for a whole stack. A commercial CFD tool w ...

2004

Swiss SOFC Integration Activities : Stacks, Systems, and Applications

Raphaël Ihringer

Solid Oxide Fuel Cell (SOFC) application development is very well represented in Switzerland by two companies. Sulzer Hexis AG is one of the world leaders in the commercialization of SOFC systems for single family houses. A smaller company, HTceramix, is a ...

2004

Energy balance model of a SOFC cogenerator operated with biogas

François Maréchal, Daniel Favrat, Jan Van Herle

A small cogeneration system based on a Solid Oxide Fuel Cell (SOFC) fed on the renewable energy source biogas is presented. An existing farm biogas production site (35 m3 per day), currently equipped with a SOFC demonstration stack, is taken for reference. ...

Elsevier2003

Biogas exploitation by SOFC

Daniel Favrat, Jan Van Herle

Biogas as renewable source of energy is underexploited. We extrapolate the potential recoverable from waste streams in the EU-15 to 769 PJ (17.5 Mtoe), of which under 10% is used (1.7 Mtoe). SOFC can promote the valorisation of biogas in small CHP installa ...

European Solid Oxide Fuel Cell Forum2002

Materials for Methane-fueled SOFC Systems

Jan Van Herle, Stefan Diethelm, Raphaël Ihringer, Joseph Sfeir

Abstract: A short overview of recent work on electroceramic materials relevant to methane-fueled SOFC systems is given. Various fuel feed options are considered, such as pure methane, biogas, and the addition of reforming agents. The principle and implemen ...

Trans Tech Publications LTD2002