Publications de Sylvain Lemofouet-Gatsi

On The Strategies Towards Isothermal Gas Compression And Expansion

Alfred Rufer, Mahbod Heidari, Sylvain Lemofouet-Gatsi

Isothermal compression/expansion is regarded as the most promising process in many applications and many researchers and inventors have tried different methods to achieve this goal. The current article first studies the gradual roadmap from adiabatic towar ...

2014

Driving and Filling Personal Vehicles – The Questions of Energy - and Power - Density ( A Fast Filling Station for the Compressed Air Car )

Alfred Rufer, Sylvain Lemofouet-Gatsi, Mahbod Heidari, Arnaud Leuba

In the context of the development of zero emissions personal vehicles, compressed air cars have been proposed, as alternative solutions to electric solutions, with a small energy content leading to a limited range, but with interesting properties regarding ...

2011

L'air comprimé pour stocker l'énergie : une solution prometteuse

Sylvain Lemofouet-Gatsi

Une Spin-off de l'EPFL réinvente le stockage hydropneumatique d'énergie pour parvenir à une exploitation plus efficace et écologique des sources renouvelables intermittentes. ...

2008

Stockage d'énergie par air comprimé. Un défi pour les circuits d'électronique de puissance

Alfred Rufer, Sylvain Lemofouet-Gatsi

The principle of air compression can be utilized for the storage of electrical energy, with variable properties from the point of view of the energy efficiency. For the involved thermodynamic phenomena different approaches and realized systems lead to more ...

2007

Efficiency Considerations and Measurements of a Hybrid Energy Storage System based on Compressed Air and Supercapacitors

Alfred Rufer, Sylvain Lemofouet-Gatsi

This paper presents the study and experimentation of a hybrid energy storage system based on Compressed Air, where the storage and discharge are done within maximum efficiency conditions for the volumetric machine. As these maximum efficiency conditions im ...

2007

Multichannel DC-DC Converter’s Efficiency Optimisation by variable Number of active Channels

Alfred Rufer, Sylvain Lemofouet-Gatsi, Lukas Fleischli

In the context of energy storage with supercapacitors, the so called round trip efficiency is an important factor that can be strongly affected by the characteristics or performances of the used converter. This paper presents a dedicated DC-DC converter, w ...

2006

Energetic Performance of a Hybrid Energy Storage System based on Compressed Air and Super Capacitors

Alfred Rufer, Sylvain Lemofouet-Gatsi

This paper presents a study and experimentation of a hybrid energy storage system prototype, based on Compressed Air, where the charging and discharging is done within maximum efficiency conditions of the volumetric machine. As the maximum efficiency condi ...

2006

Hybrid Energy Storage System Based on Compressed Air and Super-Capacitors with Maximum Efficiency Point Tracking (MEPT)

Alfred Rufer, Sylvain Lemofouet-Gatsi

This paper presents a hybrid energy storage system mainly based on Compressed Air, where the storage and withdrawal of energy are done within maximum efficiency conditions. As these maximum efficiency conditions impose the level of converted power, an inte ...

2006

Stockage d'énergie par air comprimé: un défi pour les circuits d'électronique de puissance

Alfred Rufer, Sylvain Lemofouet-Gatsi

Le principe de la compression de l’air peut être utilisé pour le stockage de l’énergie électrique, avec des performances très variables du point de vue du rendement énergétique. Dans le domaine des phénomènes thermodynamiques impliqués, différentes approch ...

2006

A Hybrid Energy Storage System Based on Compressed Air and Super Capacitors With Maximum Efficiency Point Tracking (MEPT)

Alfred Rufer, Sylvain Lemofouet-Gatsi

In addition to the high-capacity storage facilities based on hydropower technologies, electrochemical solutions are today’s candidate for storage for renewable energy sources support. However, sustainability and limited life cycles of batteries are often i ...

2006