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Jan Van Herle

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Publications associées (225)

Real-SOFC – A Joint European Effort in Understanding SOFC Degradation

Jan Van Herle

The Integrated Project Real-SOFC joins 26 partners from throughout Europe active in planar SOFC technology. The project is funded by the European Commission within the Sixth Framework Programme and aims at improving the understanding of degradation in SOFC ...

2007

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

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

Large scale power production benefits from the high efficiency of gas-steam combined cycles. In the lower power range, fuel cells are a good candidate to combine with gas turbines. Such systems can achieve efficiencies exceeding 60%. High temperature Solid ...

2007

Design of 500 W Class SOFC Stack with Homogeneous Cell Performance

Stefan Diethelm, Jan Van Herle, Zacharie Wuillemin, Arata Nakajo, Emily Thorn, Nordahl Autissier

Our planar SOFC stacking technology uses unprofiled metallic interconnects (MIC) and thin cells of tape cast anode supported YSZ. The key element is the gas diffusion layer (GDL) between cell and MIC, which consists of so-called SOFConnex™. Using square ce ...

The Electrochemical Society2007

Local current measurement in a solid oxide fuel cell repeat element

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

A planar solid oxide fuel cell repeating unit, 50 cm2 in total active electrode size, consisting of an anode supported electrolyte cell bearing two 7 mm holes for fuel and air injection, and contacted to two dense metal current collector plates ...

2007

Tubular La0.7Ca0.3Fe0.85Co0.15O3-delta Perovskite Membranes, Part I: Preparation and Properties

Stefan Diethelm, Jan Van Herle

Dense tubular self-supporting La0.7Ca0.3Fe0.85 Co0.15O3-δperovskite membranes were prepared by thermoplastic extrusion. The rheological behavior of the ceramic mixture was studied. Non-deformed tubes o ...

2006

Dynamic behaviour of SOFC short stacks

Diego Larrain, Raphaël Ihringer, Jan Van Herle, Joseph Sfeir, Nicolas Badel, Nordahl Autissier

Electrical output behaviour obtained on solid oxide fuel cell stacks, based on planar anode supported cells (50 or 100 cm2 active area) and metallic interconnects, is reported. Stacks (1–12 cells) have been operated with cathode air and anode hydrogen flow ...

2006

Oxygen transport in La0.5Sr0.5Fe1-yTi yO3-δ (y=0.0,0.2) membranes

Stefan Diethelm, Jan Van Herle, Defne Bayraktar

The influence of partial substitution of Fe with Ti on the oxygen transport properties of La1- xSrxFeO3 membranes was investigated in view of their application for oxygen separation. Samples of composition La0.5Sr0.5 Fe1-yTiyO3-δ (y = 0, 0.2) were prepared ...

2006

Simulation of SOFC stack and repeat elements including interconnect degradation and anode reoxidation risk

Diego Larrain, Daniel Favrat, Jan Van Herle

Reliability of SOFC stacks is a complex and key issue. This paper presents a simulation study including some degradation processes, namely, interconnect degradation and the anode reoxidation potential. Quantification for these phenomena has been included i ...

2006

Tubular La0.7Ca0.3Fe0.85 Co0.15O3-δPerovskite Membranes, Part II: Performance and Stability

Stefan Diethelm, Jan Van Herle

Oxygen permeability through the tubular La0.7Ca0.3Fe0.85 Co0.15O3-δ perovskite membrane prepared by thermoplastic extrusion was measured in the temperature range from 800° to 1040°C in an air/argon gradient, and compared with the oxygen permeability of pla ...

2006

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

Correlation between oxygen transport properties and microstructure in La0.5Sr0.5FeO3-δ

Stefan Diethelm, Philippe Buffat, Jan Van Herle, Joseph Sfeir

The effect of the bulk microstructure (grain size distribution, grain boundary composition on the oxygen transport properties of La0.5Sr0.5FeO3membranes was investigated. For this purpose, samples with different microstruct ...

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

PROGRESS IN STACK POWER DENSITY USING THE SOFCONNEX™ CONCEPT

Alexandre Closset, Stefan Diethelm, Diego Larrain, Raphaël Ihringer, Jan Van Herle, Zacharie Wuillemin, Christian Blanc, Emily Thorn, Nordahl Autissier

Our SOFC stack development technology is based on the unique SOFConnexTM concept, using flexible gas distribution layers between metal sheet interconnect and thin ASE cells. Flexibility is given both in material and design. This ensures proper electrical c ...

The Electrochemical Society2005

Innovative flexible SOFC stack concept

Stefan Diethelm, Jan Van Herle

We present a SOFC stack technology based on the unique SOFConnex™ concept. It uses flexible gas distribution layers between metal sheet interconnects and thin ASE cells (Ni-YSZ anode supported, thin electrolyte). Flexibility is given both in material and d ...

2005

Characterization of perovskite powders for cathode and oxygen membranes made by different synthesis routes

Philippe Buffat, Nicolas Xanthopoulos, Jan Van Herle, Elena Suvorova Buffat, Sébastien Vaucher

Strontium lanthanum manganite (LSM) and lanthanum ferrite (LSF) perovskite cathode and oxygen membrane materials were synthesized using different techniques: spray pyrolysis, a modified citrate route, oxalate and carbonate co-precipitations. The use of Ca, ...

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

A Methodology for Thermo-Economic Modeling and Optimization of SOFC Systems

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

Fuel cell systems integrate the fuel cell technology with fuel processing and post processing. A thermo-economic optimization method has been developed to systematically generate the most attractive configurations of the integrated system. In the developed ...

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

Anode supported solid oxide fuel cells with screen-printed cathodes

Jan Van Herle

To increase power density at reduced temperature operation of SOFC, thin film 8YSZ electrolytes were deposited on Ni-YSZ anode support plates by tape casting and cofiring. Cathode behaviour, limiting cell output at lower temperature, was studied in more de ...

2001

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