Jürg Alexander Schiffmann
Professeur assistant tenure track
EPFL STI IGM LAMD
MC B2 255 (Microcity)
Rue de la Maladière 71b, CP 526
CH-2002 Neuchâtel 2
EPFL STI IMT IMT-GE
MC B2 245 (Microcity)
Rue de la Maladière 71b, CP 526
CH-2002 Neuchâtel 2
Compétences
Integrated mechanical design and optimization
Small scale turbomachinery
Gas lubricated bearings
Rotordynamics
Heat pumps
Organic Rankine Cycles
Gas turbines
Publications
Publications
E. Guenat; J. Schiffmann : Performance potential of gas foil thrust bearings enhanced with spiral grooves; Tribology International. 2018-11-12. 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. 2018-11-12. DOI : 10.1016/j.applthermaleng.2018.11.037.
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.
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.
V. Mounier / J. A. Schiffmann (Dir.) : Potential and Challenges of ORC driven Heat Pumps Based on Gas Bearing Supported Turbomachinery. Lausanne, EPFL, 2018. DOI : 10.5075/epfl-thesis-8567.
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.
C. Falsetti / J. R. Thome; M. Magnini (Dir.) : Experimental characterisation of the thermohydraulic performance of a micro-pin fin evaporator: Heat transfer, flow visualization and modelling. Lausanne, EPFL, 2018. DOI : 10.5075/epfl-thesis-8423.
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. 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.
H. Huang / J. R. Thome (Dir.) : Flow Boiling Pressure Drop and Heat Transfer of Refrigerants in Multi-microchannel Evaporators under Steady and Transient States. Lausanne, EPFL, 2016. DOI : 10.5075/epfl-thesis-7306.
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.
C. Arpagaus; F. Bless; J. Schiffmann; S. S. Bertsch : Multi-temperature heat pumps: A literature review; International Journal of Refrigeration. 2016. DOI : 10.1016/j.ijrefrig.2016.05.014.
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.
Q. Theurillat-Bonjour / Y. Perriard; J. Giovanola (Dir.) : Étude des engrenages de microtechnique. Lausanne, EPFL, 2016. DOI : 10.5075/epfl-thesis-6890.
M. Gómez Marzoa / J. R. Thome (Dir.) : Innovative low-mass cooling systems for the ALICE ITS Upgrade detector at CERN. Lausanne, EPFL, 2016. DOI : 10.5075/epfl-thesis-6993.
R. L. Amalfi / J. R. Thome (Dir.) : Two-Phase Heat Transfer Mechanisms within Plate Heat Exchangers. Lausanne, EPFL, 2016. DOI : 10.5075/epfl-thesis-6856.
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 : Modeling and Experimental Investigation of an Oil-Free Micro Compressor-Turbine Unit for an ORC Driven Heat Pump. 2014. ASME TurboExpo 2014, Düsseldorf, Germany, June 16-20, 2014. p. ASME-Paper GT2014-25112.
J. Demierre; D. Favrat; J. A. Schiffmann; J. Wegele : Experimental investigation of a Thermally Driven Heat Pump based on a double Organic Rankine Cycle and an oil-free Compressor-Turbine Unit; International Journal of Refrigeration. 2014. DOI : 10.1016/j.ijrefrig.2014.04.024.
A. Terzis / P. Ott (Dir.) : Detailed heat transfer distributions of narrow impingement channels for integrally cast turbine airfoils. Lausanne, EPFL, 2014. DOI : 10.5075/epfl-thesis-6177.
J. A. Schiffmann : Enhanced Groove Geometry for Herringbone Grooved Journal Bearings; ASME Journal of Engineering for Gas Turbines and Power. 2013. DOI : 10.1115/1.4025035.
J. A. Schiffmann : Enhanced Groove Geometry for Herringbone Grooved Journal Bearing. 2013. ASME Turbo Expo 2013, San Antonio, Texas, USA, June 3-7, 2013.
J. A. Schiffmann : Integrated Design and Multi-Objective Optimization of a Single Stage Heat-Pump Turbocompressor. 2013. International Design Enginneering Technical Conferences & Computers and Information in Engineering Conference IDETC/CIE 2013, Portland, Oregon, USA, August 4-7, 2013.
S. Delalay / A. Rufer (Dir.) : Étude systémique pour l'alimentation hybride. Lausanne, EPFL, 2013. DOI : 10.5075/epfl-thesis-5768.
I. Espuny-Camacho; K. A. Michelsen; D. Gall; D. Linaro; A. Hasche et al. : Pyramidal Neurons Derived from Human Pluripotent Stem Cells Integrate Efficiently into Mouse Brain Circuits In Vivo; Neuron. 2013. DOI : 10.1016/j.neuron.2012.12.011.
J. Schiffmann; Z. S. Spakovszky : Foil Bearing Design Guidelines for Improved Stability; Journal of Tribology. 2013. DOI : 10.1115/1.4007759.
J. A. Schiffmann; Z. S. Spakovszky : Foil bearing design guidelines for improved stability. 2012. International Design Engineering Technical Conferences & Computers and Information in Engineering Conferences IDETC/CIE 2012, Chicago, IL, USA, August 12-15, 2012.
M. Zehnder; J. A. Schiffmann; J.-B. Carré; D. Favrat : Implementation of a scroll booster compressor into a single-stage air-water heat pump for peak winter day. 2010. International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact on Energy Systems, Lausanne, Switzerland, June 14-17, 2010.
J. Schiffmann; D. Favrat : Integrated Design and Optimization of Gas Bearing Supported Rotors; Journal Of Mechanical Design. 2010. DOI : 10.1115/1.4001381.
J. Schiffmann; D. Favrat : The effect of real gas on the properties of Herringbone Grooved Journal Bearings; Tribology International. 2010. DOI : 10.1016/j.triboint.2010.03.006.
J. Schiffmann; D. Favrat : Design, experimental investigation and multi-objective optimization of a small-scale radial compressor for heat pump applications; Energy. 2010. DOI : 10.1016/j.energy.2009.10.010.
J. Schiffmann; D. Favrat : Experimental investigation of a direct driven radial compressor for domestic heat pumps; International Journal of Refrigeration. 2009. DOI : 10.1016/j.ijrefrig.2009.07.006.
J. Schiffmann / D. Favrat (Dir.) : Integrated design, optimization and experimental investigation of a direct driven turbocompressor for domestic heat pumps. Lausanne, EPFL, 2008. DOI : 10.5075/epfl-thesis-4126.
J. Schiffmann; D. Favrat : High-Speed Low Power Radial Turbocompressor For Oil-Free Heatpumps. 2006. Purdue Compressor Engineering Conference, Rawls Hall, Purdue University campus, Lafayette USA, 15-20 July 2006.
J. Schiffmann; D. Favrat : Multi-Objective Optimisation of Herringbone Grooved Gas Bearing Supporting a High Speed Rotor, Taking into account Rarefied Gas and Real Gas Effects. 2006. 8th Biennial ASME Conference on Engineering Systems Design and Analysis, Torino, Italy, 4-7 July 2006. p. 9 pages.
J. Schiffmann; D. Favrat; A. K. Molyneaux : Theoretical Design of a High Speed, Oil Free Radial Compressor for Domestic Heat Pumps. 2005. 8th-IEAHPC-2005, Las Vegas, 30 may - 2 june 2005. p. 12.
J. Schiffmann; D. Favrat : Theoretical Design of a High-Speed Low Power Radial Turbocompressor. 2005. 6th Europen Turbomachinery Conference, Lille, France.
J. Schiffmann ; Rotary piston machine. WO0049276 ; AU3806200 ; WO0049276 . 2001.
Enseignement & Phd
Enseignement
- Mechanical Engineering,
Programmes doctoraux
- Doctoral Program in Manufacturing Systems and Robotics
- Doctoral Program in Energy
- Doctoral Program in Microsystems and Microelectronics
- Doctoral program in advanced manufacturing
- Doctoral program in robotics, control, and intelligent systems
Doctorants
Cours
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... 
Génie mécanique, 2018-2019, Master semestre 3, language : anglais
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.
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...