Jürg Alexander Schiffmann
EPFL STI IGM LAMD
MC B2 255 (Bâtiment MC)
Rue de la Maladière 71b, CP 526
CH-2002 Neuchâtel 2
Unité: SGM-ENS
EPFL STI IMT-GE
MC B2 245 (Bâtiment MC)
Rue de la Maladière 71b, CP 526
CH-2002 Neuchâtel 2
Biographie
After obtaining his diploma in mechanical engineering from EPFL in 1999 he co-founded a start-up company dedicated to the design of gas bearing supported rotors. In 2005 he joined Fischer Engineering Solutions where he led the development of small-scale, gas bearing supported high-speed turbomachinery for fuel cell air supplies and for domestic scale heat pumps. In parallel he worked on his PhD, which he obtained from EPFL in 2008 and for which he was awarded the SwissElectric Research Award. He then joined the Gas Turbine Lab at MIT as a postdoctoral associate where he worked on foil bearings and on the experimental investigation of radial diffusers. In 2013 he was nominated assistant professor at the Ecole Polytechnique Fédérale de Lausanne where he founds the Laboratory for Applied Mechanical Design. His current research interest are in gas lubricated bearings, in aerodynamics of small-scale compressors and turbines and in automated design and optimization methodologies.
Compétences
Integrated mechanical design and optimization
Small scale turbomachinery
Gas lubricated bearings
Rotordynamics
Heat pumps
Organic Rankine Cycles
Gas turbines
Small scale turbomachinery
Gas lubricated bearings
Rotordynamics
Heat pumps
Organic Rankine Cycles
Gas turbines
Publications
Infoscience
Publications
E. Guenat; J. Schiffmann : Thin Gas Film Isothermal Condensation in Aerodynamic Bearings; Journal of Tribology. 2019-11-01. DOI : 10.1115/1.4044447.
J. Schiffmann; K. Kontomaris; C. Arpagaus; F. Bless; S. Bertsch : Scale limitations of gas bearing supported turbocompressors for vapor compression cycles; International Journal of Refrigeration. 2019-10-03. DOI : 10.1016/j.ijrefrig.2019.09.019.
P. H. Wagner; J. Van Herle; J. A. Schiffmann : Theoretical and Experimental Investigation of a Small-scale, High-speed, and Oil-free Radial Anode Off-gas Recirculation Fan for Solid Oxide Fuel Cell Systems; Journal of Engineering for Gas Turbine and Power. 2019-10-01. DOI : 10.1115/1.4045104.
P. H. Wagner; Z. Wuillemin; S. Diethelm; J. Van Herle; J. A. Schiffmann : Design and Experimental Realization of a Steam-Driven Micro Recirculation Fan for Solid Oxide Fuel Cell Systems. 2019-09-08. 16th Symposium on Solid Oxide Fuel Cells (SOFC-XIV), Kyoto, Japan, September 8-13, 2019. p. 187-193. DOI : 10.1149/09101.0187ecst.
K. Shalash; J. Schiffmann : Pressure Profile Measurements within The Gas Film of Journal Foil Bearings Using An Instrumented Rotor with Telemetry; Journal of Engineering for Gas Turbines and Power. 2019-09-01. DOI : 10.1115/1.4044798.
K. Shalash; J. Schiffmann : An Instrumented High-Speed Rotor with Embedded Telemetry for The Continuous Spatial Pressure Profile Measurement in Gas Lubricated Bearings: A Proof of Concept; Journal of Engineering for Gas Turbines and Power. 2019-09-01. DOI : 10.1115/1.4044797.
C. Arpagaus; M. Prinzing; R. Kuster; F. Bless; M. Uhlman et al. : High temperature heat pumps – Theoretical study on low GWP HFO and HCFO refrigerants. 2019-08-25. ICR 2019 - The 25th IIR International Congress of Refrigeration,, Montréal, Québec, Canada, August 24-30, 2019.
C. Arpagaus; R. Kuster; F. Bless; M. Prinzing; M. Uhlmann et al. : High temperature heat pump using HFO and HCFO refrigerants – system design and experimental results. 2019-08-25. ICR 2019 - The 25th IIR International Congress of Refrigeration, Montréal, Québec, Canada, August 24-30, 2019.
E. P. Guenat; J. A. Schiffmann : Multi-Objective Optimization of Grooved Gas Journal Bearings for Robustness in Manufacturing Tolerances; Tribology Transaction. 2019-08-22. DOI : 10.1080/10402004.2019.1642547.
P. Bättig; J. Schiffmann : Data-Driven Model for the Dynamic Characteristics of O-Rings for Gas Bearing Supported Rotors; Journal of Applied Mechanics. 2019-08-01. DOI : 10.1115/1.4043473.
L. Gu; E. P. Guenat; J. A. Schiffmann : A REVIEW OF GROOVED DYNAMIC GAS BEARINGS; Applied Mechanics Reviews. 2019-07-08. DOI : 10.1115/1.4044191.
P. H. Wagner; J. Van Herle; J. A. Schiffmann : Theoretical and Experimental Investigation of a Small-Scale, High-Speed, and Oil-Free Radial Anode Off-Gas Recirculation Fan for Solid Oxide Fuel Cell Systems. 2019-06-17. ASME Turbo Expo 2019, Phoenix AZ, USA, June 17-21, 2019. p. GT2019-91361.
K. Shalash; J. Schiffmann : Pressure Profile Measurements within the Gas Film of Journal Foil Bearings Using an Instrumented Rotor with Telemetry. 2019-06-17. ASME Turbo Expo 2019, Phoenix AZ, USA, June 17-21, 2019. p. GT2019-90984.
K. Shalash; J. A. Schiffmann : An Instrumented High-Speed Rotor with Embedded Telemetry for the Continuous Spatial Pressure Profile Measurement in Gas Lubricated Bearings: A Proof of Concept. 2019-06-17. ASME Turbo Expo 2019 - Turbomachinery Technical Conference & Exposition, Phoenix AZ, USA, June 17-21, 2019. p. GT2019-90983.
M. Diehl; J. A. Schiffmann : Impact of large tip clearance ratios on the performance of a centrifugal compressor. 2019-04-08. Euro Turbo Conderence ETC13, Lausanne, Switzerland, April 8-12, 2019.
S. Bahamonde; M. Pini; C. De Servi; J. Schiffmann; P. Colonna : Active subspaces for the optimal meanline design of unconventional turbomachinery (vol 127, pg 1108, 2017); Applied Thermal Engineering. 2019-03-05. DOI : 10.1016/j.applthermaleng.2018.12.099.
E. Guenat; J. Schiffmann : Performance potential of gas foil thrust bearings enhanced with spiral grooves; Tribology International. 2019-03-01. DOI : 10.1016/j.triboint.2018.11.003.
L. Carlos Mendoza; S. Lemofouet; J. Schiffmann : Two-phase and oil-free co-rotating scroll compressor/expander; Applied Thermal Engineering. 2019-02-05. DOI : 10.1016/j.applthermaleng.2018.11.037.
J. Gomes Pereira Junior / F. Avellan (Dir.) : Predicting the dynamic behavior of Francis turbine generating units. Lausanne, EPFL, 2019. DOI : 10.5075/epfl-thesis-7131.
J. A. J.-M. Chavanne / Y. Perriard; Y. R. C. Civet (Dir.) : Cylindrical Dielectric Elastomer Actuator for Cardiac Assist Device. Lausanne, EPFL, 2019. DOI : 10.5075/epfl-thesis-9397.
K. M. Z. A. Shalash / J. A. Schiffmann (Dir.) : An Experimental Study of Gas Lubricated Foil Journal Bearings Using an Instrumented Rotor with Wireless Telemetry. Lausanne, EPFL, 2019. DOI : 10.5075/epfl-thesis-9163.
V. Mounier; C. Picard; J. A. Schiffmann : Data-Driven Predesign Tool for Small-Scale Centrifugal Compressor in Refrigeration; Journal of Engineering for Gas Turbines and Power. 2018-10-24. DOI : 10.1115/1.4040845.
C. Picard; J. A. Schiffmann : Impacts of Constraints and Constraint Handling Strategies for Multi-Objective Mechanical Design Problems. 2018-07-15. GECCO '18, Kyoto, Japan, July 15–19, 2018.
C. ARPAGAUS; F. BLESS; M. UHLMANN; J. A. Schiffmann; S. S. BERTSCH : High Temperature Heat Pumps: Market Overview, Stateof the Art, Research Status, Refrigerants, and Application Potentials. 2018-07-09. 17th International Refrigeration and Air Conditioning Conference, Purdue, USA, July 9-12, 2018. p. 2200, Page 1-10.
K. (. KONTOMARIS; C. ARPAGAUS; S. S. BERTSCH; J. A. Schiffmann : Small, High-Speed, Oil-Free Radial Turbo-compressors for Cooling Applications: Refrigerant Selection. 2018-07-09. 24 th International Compressor Engineering Conference, Purdue, USA, July 9-12, 2018. p. 2386, pages 1-10.
C. ARPAGAUS; F. BLESS; M. UHLMANN; E. BÜCHEL; S. FREI et al. : High temperature heat pump using HFO and HCFO refrigerants – System design, simulation, and first experimental results. 2018-07-09. 17 th International Refrigeration and Air Conditioning Conference at Purdue, Purdue, USA, July 9-12, 2018.
K. Rosset; V. Mounier; E. Guenat; J. Schiffmann : Multi-objective optimization of turbo-ORC systems for waste heat recovery on passenger car engines; Energy. 2018-06-27. DOI : 10.1016/j.energy.2018.06.193.
K. Shalash; E. Guenat; J. Schiffmann : Spatially Sampled Pressure Profile Measurements in Externally Pressurized Gas Journal Bearings; Tribology Transactions. 2018-06-22. DOI : 10.1080/10402004.2018.1480078.
E. Guenat; J. Schiffmann : Effects of humid air on aerodynamic journal bearings; Tribology International. 2018-06-15. DOI : 10.1016/j.triboint.2018.06.002.
V. Mounier; C. Picard; J. Schiffmann : Data-Driven Pre-Design Tool for Small Scale Centrifugal Compressors in Refrigeration, Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines. 2018-06-11. ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, Oslo, Norway, June 11-15, 2018. p. V008T26A012. DOI : 10.1115/GT2018-76349.
L. E. Olmedo Ocampo; V. Mounier; L. C. Mendoza Toledo; J. A. Schiffmann : Dimensionless correlations and performance maps of scroll expanders for micro-scale Organic Rankine Cycles; Energy. 2018-05-06. DOI : 10.1016/j.energy.2018.05.001.
E. P. Guenat; J. A. Schiffmann : Real-gas effects on aerodynamic bearings; Tribology International. 2018-01-08. DOI : 10.1016/j.triboint.2018.01.008.
V. Mounier; C. Picard; J. Schiffmann : Data-Driven Pre-Design Tool For Small Scale Centrifugal Compressors In Refrigeration. 2018-01-01. ASME Turbo Expo: Turbomachinery Technical Conference and Exposition, Oslo, NORWAY, Jun 11-15, 2018. p. V008T26A012.
J. N. Gomes Borga Delgado / F. Avellan; D. I. Cameira Covas (Dir.) : Pumps running as turbines for energy recovery in water supply systems. Lausanne, EPFL, 2018. DOI : 10.5075/epfl-thesis-9036.
C. Arpagaus; F. Bless; M. Uhlmann; J. Schiffmann; S. S. Bertsch : High temperature heat pumps: Market overview, state of the art, research status, refrigerants, and application potentials; Energy. 2018. DOI : 10.1016/j.energy.2018.03.166.
J. Poliakine / Y. Perriard; Y. R. C. Civet (Dir.) : MEMS Generator Study for an Embedded Energy Harvesting System. Lausanne, EPFL, 2018. DOI : 10.5075/epfl-thesis-8380.
F. C. Şahin; J. Schiffmann : Dynamic pressure probe response tests for robust measurements in periodic flows close to probe resonating frequency; Measurement Science and Technology. 2018. DOI : 10.1088/1361-6501/aa9cf4.
V. Mounier; L. E. Olmedo; J. Schiffmann : Small scale radial inflow turbine performance and pre-design maps for Organic Rankine Cycles; Energy. 2018. DOI : 10.1016/j.energy.2017.11.002.
K. Shalash; F. Şahin; J. Schiffmann : Non-linear transfer function identification of pressure probes using Siren Disks; Experimental Thermal and Fluid Science. 2018. DOI : 10.1016/j.expthermflusci.2017.11.001.
K. M. Z. A. Shalash; J. A. Schiffmann : Comparative Evaluation of Foil Bearings with Different Compliant Structures for Improved Manufacturability. 2017. ASME Turbo Expo, Charlotte, North Carolina, USA, June 26-30, 2017. p. V07AT34A014. DOI : 10.1115/GT2017-63615.
V. Mounier; L. C. Mendoza Toledo; J. A. Schiffmann : Thermo-economic optimization of an ORC driven heat pump based on small scale turbomachinery and comparison with absorption heat pumps; International Journal of Refrigeration. 2017. DOI : 10.1016/j.ijrefrig.2017.05.021.
P. H. Wagner; Z. Wuillemin; S. Diethelm; J. Van Herle; J. A. Schiffmann : Modeling and Designing of a Radial Anode Off-Gas Recirculation Fan for Solid Oxide Fuel Cell Systems; Journal of Electrochemical Energy Conversion and Storage. 2017. DOI : 10.1115/1.4036401.
C. Arpagaus; F. Bless; S. Bertsch; A. Javed; J. A. Schiffmann : Heat Pump driven by a Small-Scale Oil-Free Turbocompressor – System Design and Simulation. 2017. 12th IEA Heat Pump Conference 2017, Rotterdam, Netherlands, May 14-18, 2017.
V. Mounier; J. A. Schiffmann : ORC Driven Heat Pump Running on Gas Bearings for Domestic Applications: Proof of Concept and Thermo-Economic Improvement Potential. 2017. 12th IEA heat Pump Conference 2017, Rotterdam, Netherlands, May 14-18, 2017.
F. Bless; C. Arpagaus; S. S. Bertsch; J. A. Schiffmann : Theoretical analysis of steam generation methods - Energy, CO 2 emission, and cost analysis; Energy. 2017. DOI : 10.1016/j.energy.2017.04.088.
J. A. Schiffmann; J.-B. Carré; C. Arpagaus; S. Bertsch : Turbocompressors for Domestic Heat Pumps – A Critical Review. 2017. 12th IEA Heat Pump Conference 2017, Rotterdam, Netherlands, May 14-18, 2017.
J. N. Everitt; Z. S. Spakovszky; D. Rusch; J. A. Schiffmann : The Role of Impeller Outflow Conditions on the Performance of Vaned Diffusers; Journal of Turbomachinery. 2017. DOI : 10.1115/1.4035048.
K. Shalash; J. Schiffmann : On the manufacturing of compliant foil bearings; Journal of Manufacturing Processes. 2017. DOI : 10.1016/j.jmapro.2016.12.021.
L. C. Mendoza; S. Lemofouet; J. Schiffmann : Testing and modelling of a novel oil-free co-rotating scroll machine with water injection; Applied Energy. 2017. DOI : 10.1016/j.apenergy.2016.10.089.
L. C. Mendoza Toledo; M. Berdasco; A. Coronas; J. A. Schiffmann : Theoretical Study of a Novel Oil-Free Co-Rotating Scroll Compressor Integrated into a Hybrid Absorption Heat Pumps. 2016. 12th IIR-Gustav Lorentzen Conference on Natural Refrigerants, Edinburgh, UK, 21st-24th August 2016.
J. Muye; L. C. Mendoza; J. A. Schiffmann; A. Coronas : Analysis of a Combined Absorption Cycle for Power and Cooling Production Using a Novel Oil-Free Co-Rotating Scroll Expander. 2016. 12th IIR-Gustav Lorentzen Conference on Natural Refrigerants, Edinburgh, UK, 21st-24th August 2016.
C. Arpagaus; F. Bless; J. Schiffmann; S. S. Bertsch : Multi-temperature heat pumps: A literature review; International Journal Of Refrigeration-Revue Internationale Du Froid. 2016. DOI : 10.1016/j.ijrefrig.2016.05.014.
C. Arpagaus; S. S. Bertsch; A. Javed; J. A. Schiffmann : Two-Stage Heat Pump using Oil-Free Turbocompressors – System Design and Simulation. 2016. 16 th International Refrigeration and Air Conditioning Conference at Purdue, Purdue, West Lafayette, USA, July 11-14, 2016.
J.-B. Carré; D. Favrat; J. A. Schiffmann : Experimental investigation of a two-stage oil-free domestic Air/Water heat pump prototype powered by an oil-free high-speed twin-stage radial compressor rotating on gas bearings. 2016. 16 th International Refrigeration and Air Conditioning Conference at Purdue, Purdue, West Lafayette, USA, July 11-14, 2016.
C. Arpagaus; F. Bless; J. A. Schiffmann; S. S. Bertsch : Multi-Temperature Heat Pumps - A Literature Review. 2016. 16 th International Refrigeration and Air Conditioning Conference at Purdue, Purdue, West Lafayette, USA, July 11-14, 2016.
A. Javed; C. Arpagaus; S. Bertsch; J. A. Schiffmann : Design of Oil-Free Turbocompressors for a Two-Stage Industrial Heat Pump under Variable Operating Conditions. 2016. 23 rd International Compressor Engineering Conference at Purdue, Purdue, West Lafayette, USA, July 11-14, 2016.
A. Javed; C. Arpagaus; S. Bertsch; J. Schiffmann : Small-scale turbocompressors for wide-range operation with large tip-clearances for a two-stage heat pump concept; International Journal of Refrigeration. 2016. DOI : 10.1016/j.ijrefrig.2016.06.015.
J. Everitt; Z. Spakovszky; D. Rusch; J. A. Schiffmann : THE ROLE OF IMPELLER OUTFLOW CONDITIONS ON THE PERFORMANCE OF VANED DIFFUSERS. 2016. ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, Seoul, South Korea, June 13 – 17, 2016.
K. Rosset; V. Mounier; E. P. Guenat; O. Pajot; J. A. Schiffmann : Potential of Small-Scale Turbomachinery for Waste Heat Recovery on Automotive Internal Combustion Engines. 2015. 3rd International Seminar on ORC Power Systems (ASME-ORC2015), Brussels, Belgium, October 12-14, 2015.
V. Singh; P. H. Wagner; Z. Wuillemin; S. Diethelm; J. A. Schiffmann et al. : Towards the Next-Generation of Solid Oxide Fuel Cell Systems. 2015. ECS Conference on Electrochemical Energy Conversion & Storage with SOFC-XIV, Glasgow, UK, July 26-31, 2015. p. 2373-2386. DOI : 10.1149/06801.2373ecst.
J. A. Schiffmann : Integrated Design and Multi-objective Optimization of a Single Stage Heat-Pump Turbocompressor; ASME Journal ofTurbomachinery. 2015. DOI : 10.1115/1.4029123.
L. C. Mendoza Toledo; J. A. Schiffmann : Water injection effect on a novel oil-free Co-Rotating scroll machine. 2015. VII Congreso Internacional de Ingeniería Mecánica, Cartagena, Colombia, April 28-30, 2015.
V. Mounier; L. C. Mendoza Toledo; J. A. Schiffmann : Performance assessment and comparison of thermally driven heat pumps systems. 2015. 24th IIR International Congress of Refrigeration (ICR2015), Yokohama, Japan, August 16-22, 2015.
L. C. Mendoza Toledo; J. A. Schiffmann : Co-rotating scroll machinery applied to vapor power and vapor compression cycles. 2015. 24th IIR International Congress of Refrigeration (ICR2015), Yokohama, Japan, August 16-22, 2015.
L. C. Mendoza Toledo; J. A. Schiffmann : Technical feasibility of a novel oil-free co-rotating scroll expander for a Kalina cycle. 2015. Ammonia and CO2 Refrigeration Technology, Ohrid, Macedonia, April 16-18, 2015.
P. Spasojević / P. Xirouchakis (Dir.) : Knowledge-based decision support for improving the adaptive product development process. Lausanne, EPFL, 2015. DOI : 10.5075/epfl-thesis-6484.
J. Demierre; A. Rubino; J. A. Schiffmann : Modeling and Experimental Investigation of an Oil-Free Microcompressor-Turbine Unit for an Organic Rankine Cycle Driven Heat Pump; Transactions- ASME Journal of Engineering for Gas Turbines and Power. 2015. DOI : 10.1115/1.4028391.
S. Dandavino / H. Shea (Dir.) : Microfabricated Electrospray Thrusters for a Modular Spacecraft Propulsion System. Lausanne, EPFL, 2014. DOI : 10.5075/epfl-thesis-6437.
J. A. Schiffmann : Small-Scale and Oil-Free Turbocompressor for Refrigeration Application. 2014. 2014 Purdue Conferences, Compressor Engineering, West Lafayette, Indiana, USA, July 14-17, 2014.
L. C. Mendoza Toledo; J. A. Schiffmann : Experimental Investigation of Water Injection in an Oil-Free Co-Rotating Scroll Machinery for Compressed Air Energy Storage. 2014. Purdue Conferences, Compressor Engineering, West Lafayette, Indiana, USA, 14-17 July, 2014.
Y. Madhour / J. R. Thome; B. Michel (Dir.) : 3D Integrated Architectures for Microelectronic Two-Phase Flow Cooling Applications. Lausanne, EPFL, 2014. DOI : 10.5075/epfl-thesis-6323.
J. Demierre; A. Rubino; J. A. Schiffmann :
Enseignement & Phd
Enseignement
- Mechanical Engineering,
Programmes doctoraux
- Doctoral Program in Energy
- Doctoral Program in Microsystems and Microelectronics
- Doctoral program in advanced manufacturing
- Doctoral program in robotics, control, and intelligent systems
- Doctoral Program in Mechanics
Doctorants
Bättig Philipp KasparGuenat Eliott Philippe
Iseli Elia
Katuwal Chhetri Suresh
Nakade Tomohiro
Olmedo Ocampo Luis Eric
Picard Cyril
Rosset Kévin
Schmid David
Zakeralhoseini Sajjad
A dirigé les thèses de
Diehl Markus ...Mounier Violette ...
Shalash Karim Magdi Zakaria Abdelrahman ...
Wagner Patrick Hubert ...
Cours
Systèmes mécaniques
Ce cours poursuit la compréhension de systèmes mécaniques complexes et introduit les bases pour comprendre et concevoir. L'étudiant saura expliquer le fonctionnement de systèmes complexes, en modéliser la cinématique et choisir des solutions pour réaliser... 
Dynamique des systèmes mécaniques
Ce cours poursuit la compréhension des effets cinématiques et dynamiques de systèmes mécaniques complexes et introduit les bases pour les comprendre et les modéliser. L'étudiant saura expliquer et modéliser la dynamique et choisir des modèles adéquats.
Applied mechanical design
Les étudiants sont exposés à un projet de conception mécanique. Ils vont apprendre à connaître des méthodologies pour (1) attaquer des problèmes à formulation ouverte, (2) cultivar la créativité, (3) supporter la prise de décisions et (4) développer des c...
Thermal power cycles and heat pump systems
Ce cours a pour but l'étude de l'Energie (économie et environnement: connaissances générales), des centrales et équipements thermiques et des filières de pompes à chaleur.