Daniel Favrat

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Related publications (90)

Advanced Power Plant Design Methodology using Process Integration and Multi-Objective Thermo-Economic Optimisation

Daniel Favrat, Raffaele Bolliger, François Maréchal

Thermo-economic modelling techniques are well known techniques to optimise power plant designs. These methods are usually based on the definition of a superstructure that includes the major options of the design. If this approach has proved to be appropria ...

2005

Modeling and experimental validation of solid oxide fuel cell materials and stacks

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

Results on solid oxide fuel cell stacks tested at 800° C with H2 fuel and using planar Ni-zirconia anode supported cells, 80x80x0.2 mm in size, are presented. Modeling and numerical simulation is used to interpret observed results and develop improved desi ...

2005

Modeling and study of the influence of sealing on a solid oxide fuel cell

Daniel Favrat, Jan Van Herle, Zacharie Wuillemin, Minh-Tâm Luong, Nordahl Autissier

The properties of sealing materials are important for the performance and reliability of solid oxide fuel cells (SOFC). Even if the properties of a sealing material can be studied separately, it remains difficult to quantify the effect of an imperfect seal ...

2005

Network synthesis for district heating with multiple heat plants

Daniel Favrat, François Maréchal, Céline Weber

In this paper the first results of a new method for the configuration of district energy systems are presented. District energy systems are believed to help decreasing the CO2-emissions due to energy services (heating, cooling, electricity and hot water), ...

2005

Improving performances of a lean burn cogeneration biogas engine equipped with combustion prechambers

Daniel Favrat

Test of the unscavenged prechamber ignition system on a 150kW cogeneration engine fed with biogas are presented. The objective was to reach at least 36% in fuel conversion efficiency with exhaust gas emissions lower than the Swiss regulations limits (NOx, ...

2005

Multiobjective Optimisation of integrated energy systems for remote communities considering economic and CO2 emissions

Xavier Pelet, Daniel Favrat, Geoffrey Basil Leyland

The methods for designing, planning and managing integrated energy systems, while holistically considering the major economic and environmental factors, are still embryonic. However, the first phase of the design is often crucial if we want to manage resou ...

2005

Thermo-economic Optimization of a Solid Oxide Fuel Cell, Gas Turbine Hybrid System

Daniel Favrat, Jan Van Herle, Francesca Palazzi, François Maréchal, Nordahl Autissier

Background: The electricity production market benefits from combined cycles with their high efficiency. In the lower power range, Fuel Cells are a good candidate to combine with gas turbines. Such systems can achieve efficiencies of 60% and more. High tem ...

2005

CFD simulation tool for solid oxide fuel cells

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

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

Modeling of cross-flow stack: sensitivity to thermal properties of the materials

Diego Larrain, Daniel Favrat, Michael Graetzel, Jan Van Herle

LENI activities in SOFC are focused on development of a new planar stack concept based on anode supported cells in collaboration with the company HTceramix SA. Modeling of repeat element, stack and systems is starting in parallel. This work presents a mode ...

2003

Interaction entre une onde de choc oblique et une grille d'aubes fixes parcourues par un écoulement subsonique

Daniel Favrat

EPFL1976

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