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Daniel Favrat

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Related publications (88)

Page 4 of 5

Defining the potential of usable waste heat in industrial processes with the help of pinch and exergy analysis

François Maréchal, Daniel Favrat, Matthias Bendig

This paper aims at giving a definition for waste heat in analogy to the definitions of natural resources and reserves. It aims also at presenting a method for identifying, characterizing and quantifying the available waste heat of an industrial system that ...

Czech Society of Chemical Engineering and Italian Association of Chemical Engineering2012

Sofc system with anode off-gas recirculation

Jan Van Herle, Daniel Favrat, Jürg Alexander Schiffmann, Zacharie Wuillemin, Patrick Hubert Wagner

The present invention concerns an SOFC system comprising an anode off-gas recirculation arrangement in which anode off-gas is pumped by a fan or pump of a coaxial turbine-fan assembly, the system comprising a condenser for condensing water contained in sai ...

2020

Experimental investigation of a direct driven radial compressor for domestic heat pumps

Daniel Favrat, Jürg Alexander Schiffmann

The presence of oil in domestic heat pumps is an obstacle toward higher efﬁciency, particularly for enhanced surface evaporators and for advanced concepts based on two- stage cycles. Very compact direct driven radial compressors supported on oil-free beari ...

2009

Mechanical reliability and durability of SOFC stacks. Part II: Modelling of mechanical failures during ageing and cycling

Jan Van Herle, Daniel Favrat, Arata Nakajo

Intricate relationships between mechanical and electrochemical degradation aspects likely affect the durability of solid oxide fuel cell stacks. This study presents a modelling framework that combines thermo-electrochemical models including degradation and ...

2012

Isothermal transcritical CO2 cycles with TES (thermal energy storage) for electricity storage

Daniel Favrat

Recently, TEES (thermo-electric energy storage) systems have been proposed as a new method for large-scale energy storage wherein electric power is stored as thermal energy by using a heat pump and retrieved from the TES (thermal energy storage) by using a ...

Elsevier2013

Evaluation of Natural Gas Combined Cycle Plants in China through Environomic Modeling and Multi-objective Optimization

François Maréchal, Daniel Favrat, Hongtao Li

Due to the requirements of lower capital investment, higher operational flexibility, and the pressures from environmental legislations on local pollutants and global greenhouse gases (GHGs) emissions, power generation market is in favour of natural gas bas ...

2007

Development of a natural gas reaction mechanism for engine simulations based on rapid compression machine experiments using a multi-objective optimisation strategy

Daniel Favrat, Stefan Heyne

The ignition delay times of CH4/C2H6/C3H8 mixtures representative of an average natural gas composition have been measured in a rapid compression machine (RCM) at the University of Lille. The pressure at the end of compression (EOC) varied from 13 to 21 ba ...

2008

The effect of bias in gas temperature measurements on the control of a Solid Oxide Fuel Cells system

Jan Van Herle, Daniel Favrat, Leonidas Tsikonis

In this paper the effect of systematic errors in gas temperature measurements on the thermal control of a Solid Oxide Fuel Cell system is demonstrated. Three control schemes were tested under two different conditions. First, the real gas temperature at the ...

Elsevier Science Bv2014

Network synthesis for district heating with multiple heat plants

François Maréchal, Daniel Favrat, 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

Can steam play a role in low to medium power from low temperature heat?

François Maréchal, Daniel Favrat, Jonathan Demierre

Rankine cycles for low to medium power and low temperature heat using water as working fluid, were almost written off. The main arguments speaking against them are reviewed in this paper and the conceptual design of the equipment entirely revisited. An adv ...

2006

Low power ORC-ORC systems for heat pump applications

Daniel Favrat, Jonathan Demierre

This paper presents a study of a residential (about 20kW) ORC-ORC (Organic Rankine Cycle) thermally driven heat pump. The system works with three different temperature levels similar to absorption heat pumps. The proposed concept is a hermetic system using ...

2008

Local current measurement in a solid oxide fuel cell repeat element

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

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

Apparatus for salt separation under supercritical water conditions

François Maréchal, Daniel Favrat, Adriano Viana Ensinas, Alberto Mian

Apparatus for salt separation (2) under supercritical water conditions, comprising a heat exchanger (4) and a fluidized bed reactor (6). The fluidized bed reactor comprising a supercritical water pressure containing wall (8) defining therein a fluidized be ...

2016

Evaluation of a combined-cycle setup for Solar Tower Power Plants

Daniel Favrat, Germain Augsburger

Simulation of a pure-solar combined-cycle solar thermal power was performed in order to analyse the thermodynamic and economic performance. An open volumetric receiver and packed-bed storage concept was considered. For a 15 MWe power plant, an exergetic ef ...

2009

Thermo-economic Optimisation of the Heliostat Field of Solar Tower Thermal Power Plants

Daniel Favrat, Germain Augsburger

A method of optimising the thermodynamic and economic performance of heliostat field within a solar tower thermal power plant has been developed. The method includes the generation of a heliostat field given a set of design variables, the assessment of its ...

2010

The effect of real gas on the properties of Herringbone Grooved Journal Bearings

Daniel Favrat, Jürg Alexander Schiffmann

Driven by applications using herringbone grooved bearings lubricated with a gas operating under conditions where the perfect gas assumption is not valid, the real gas effect has been introduced into the existing narrow groove theory. The enhanced model has ...

Elsevier2010

Multi-objective thermoeconomic optimisation of the design of heliostat field of solar tower power plants

Daniel Favrat, Xavier Pelet

Solar thermal power plants have a large potential, particularly in the sun belt countries around the world. The objectives of this study are to identify the heliostat fields for solar tower plants with the lowest specific energy cost and to investigate the ...

2007

Design, experimental investigation and multi-objective optimization of a small-scale radial compressor for heat pump applications

Daniel Favrat, Jürg Alexander Schiffmann

The main driver for small scale turbomachinery in domestic heat pumps is the potential for reaching higher efﬁciencies than volumetric compressors currently used and the potential for making the compressor oil-free, bearing a considerable advantage in the ...

2010

Conventional and advanced district energy systems

Daniel Favrat, Céline Weber

District energy systems have the potential to decrease the CO2 emissions linked to energy services (heating, hot water, cooling and electricity), thanks to the implementation of large polygeneration energy conversion technologies, connected to a group of b ...

Universita degli Studi di Padova2007

Numerical simulations of a prechamber autoignition cogeneration engine operating on natural gas

Daniel Favrat, Stefan Heyne

A numerical model for a prechamber autoignition gas engine under development has been established based on an experimental test case. With a simplified finiterate/ eddy-dissipation model for the combustion of natural gas, it was possible to properly reprod ...

2009