Jürg Alexander Schiffmann

Editer le profil

jurg.schiffmann@epfl.ch 41 21 695 45 48 http://lamd.epfl.ch

EPFL STI IGM LAMD
MC B2 255 (Bâtiment MC)
Rue de la Maladière 71b, CP 526
CH-2002 Neuchâtel 2

41 21 695 45 48
41 21 695 45 13
Local: MC B2 245
EPFL > STI > IGM > LAMD

Web site: Site web: https://lamd.epfl.ch/

EPFL SGM SGM-ENS
ME B1 345 (Bâtiment ME)
Station 9
CH-1015 Lausanne

41 21 695 45 48
Local: ME B1 345
EPFL > STI > STI-SGM > SGM-ENS

EPFL STI IMT-GE
MC B2 245 (Bâtiment MC)
Rue de la Maladière 71b, CP 526
CH-2002 Neuchâtel 2

41 21 695 45 48
Local: MC B2 245
EPFL > STI > IMT > IMT-GE

41 21 695 45 48
EPFL > VPO > VPO-DC > EPFLNE > EPFLNE-CC

vCard
Données administratives

Domaines de compétences

Integrated mechanical design and optimization
Small scale turbomachinery
Gas lubricated bearings
Rotordynamics
Heat pumps
Organic Rankine Cycles
Gas turbines

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.

Publications

Publications Infoscience

Publications

Techno-Economic Optimization of an Integrated Biomass Waste Gasifier–Solid Oxide Fuel Cell Plant

M. Pérez-Fortes; V. He; A. Nakajo; J. Schiffmann; F. Maréchal et al.

Frontiers in Energy Research. 2021-06-07. DOI : 10.3389/fenrg.2021.665585.

Jürg Alexander Schiffmann

Domaines de compétences

Biographie

Publications

Publications Infoscience

Publications

Techno-Economic Optimization of an Integrated Biomass Waste Gasifier–Solid Oxide Fuel Cell Plant

On the Application of Small-Scale Turbines in Industrial Steam Networks

Which professional skills do students learn in engineering team-based projects?

Unstable tilting motion of flexibly supported gas bearing bushings

Theoretical and Experimental Investigation of a 34 Watt Radial-Inflow Steam Turbine with Partial-Admission

Experimental Investigation of a Small-Scale Organic Rankine Cycle Turbo-Generator Supported on Gas-Lubricated Bearings

Theoretical and Experimental Investigation of a 34 Watt Radial-Inflow Steam Turbine with Partial-Admission

Influence of Large Relative Tip Clearances for a Micro Radial Fan and Design Guidelines for Increased Efficiency

Flexibility for large-scale deployment of PV systems in low-voltage grids

Automated Design: A Journey Across Modelling, Optimization, and Education

Prediction of the reaction forces of spiral-groove gas journal bearings by artificial neural network regression models

Nonlinear study on a rigid rotor supported by herringbone grooved gas bearings: Theory and validation

Automated Design Tool for Automotive Control Actuators

Realistic Constrained Multi-Objective Optimization Benchmark Problems from Design

Actuator Synthesis and Optimization: Evaluation of Graph-Based Approaches

Experimental Assessment of a 3D-Printed Stainless Steel Gas Foil Bearing

Extended Windage Loss Models for Gas Bearing Supported Spindles Operated in Dense Gases

Analysis of Spiral-Grooved Gas Journal Bearings by the Narrow-Groove Theory and the Finite Element Method At Large Eccentricities

Flexible Support for Gas-Lubricated Bearing Bushings

The Role of Reynolds Number Effect and Tip Leakage in Compressor Geometry Scaling at Low Turbulent Reynolds Numbers

Experimental characterization of a solid oxide fuel cell coupled to a steam-driven micro anode off-gas recirculation fan

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

Pressure Profile Measurements within The Gas Film of Journal Foil Bearings Using An Instrumented Rotor with Telemetry

Dynamic force coefficients identification on air-lubricated herringbone grooved journal bearing

An Instrumented High-Speed Rotor with Embedded Telemetry for The Continuous Spatial Pressure Profile Measurement in Gas Lubricated Bearings: A Proof of Concept

Small-scale organic Rankine cycle turbo-generator for waste heat recovery on truck engine

Numerical and experimental investigations on non-contacting seals for small-scale applications

Experimental and Numerical Investigation of a Small-Scale Steam Turbine

Sofc system with anode off-gas recirculation

Advanced design methods and non-ideal gas lubrication applied to aerodynamic bearings

Scale limitations of gas bearing supported turbocompressors for vapor compression cycles

A Review of Grooved Dynamic Gas Bearings

An Instrumented High-Speed Rotor With Embedded Telemetry For The Continuous Spatial Pressure Profile Measurement In Gas Lubricated Bearings: A Proof Of Concept

Thin Gas Film Isothermal Condensation in Aerodynamic Bearings

Design and Experimental Realization of a Steam-Driven Micro Recirculation Fan for Solid Oxide Fuel Cell Systems

High temperature heat pumps – Theoretical study on low GWP HFO and HCFO refrigerants

High temperature heat pump using HFO and HCFO refrigerants – system design and experimental results

Multi-Objective Optimization of Grooved Gas Journal Bearings for Robustness in Manufacturing Tolerances

Data-Driven Model for the Dynamic Characteristics of O-Rings for Gas Bearing Supported Rotors

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

Impact of large tip clearance ratios on the performance of a centrifugal compressor

Performance potential of gas foil thrust bearings enhanced with spiral grooves

Assessing student learning of design and project management skills in a project-based course

Two-phase and oil-free co-rotating scroll compressor/expander

Analytical and Numerical Investigation of a Small-scale Radial-Inflow Steam Turbine

Pressure Profile Measurements Within The Gas Film Of Journal Foil Bearings Using An Instrumented Rotor With Telemetry

Flexible support and enhanced groove geometries for gas lubricated bearings

Predicting the dynamic behavior of Francis turbine generating units

Mitigation of tip leakage induced phenomena in a low Reynolds number centrifugal compressor via blade loading distribution

Cylindrical Dielectric Elastomer Actuator for Cardiac Assist Device

Integrated Design, Optimization, and Experimental Realization of a Steam-Driven Micro Recirculation Fan for Solid Oxide Fuel Cell Systems

An Experimental Study of Gas Lubricated Foil Journal Bearings Using an Instrumented Rotor with Wireless Telemetry

Data-Driven Predesign Tool for Small-Scale Centrifugal Compressor in Refrigeration

Spatially Sampled Pressure Profile Measurements in Externally Pressurized Gas Journal Bearings

Impacts of Constraints and Constraint Handling Strategies for Multi-Objective Mechanical Design Problems

High Temperature Heat Pumps: Market Overview, Stateof the Art, Research Status, Refrigerants, and Application Potentials

Small, High-Speed, Oil-Free Radial Turbo-compressors for Cooling Applications: Refrigerant Selection

High temperature heat pump using HFO and HCFO refrigerants – System design, simulation, and first experimental results

Multi-objective optimization of turbo-ORC systems for waste heat recovery on passenger car engines

Effects of humid air on aerodynamic journal bearings

Data-Driven Pre-Design Tool for Small Scale Centrifugal Compressors in Refrigeration

Dimensionless correlations and performance maps of scroll expanders for micro-scale Organic Rankine Cycles

Real-gas effects on aerodynamic bearings

A co-rotational scroll machine

Pumps running as turbines for energy recovery in water supply systems

Potential and Challenges of ORC driven Heat Pumps Based on Gas Bearing Supported Turbomachinery

High temperature heat pumps: Market overview, state of the art, research status, refrigerants, and application potentials

Experimental characterisation of the thermohydraulic performance of a micro-pin fin evaporator: Heat transfer, flow visualization and modelling

MEMS Generator Study for an Embedded Energy Harvesting System

Dynamic pressure probe response tests for robust measurements in periodic flows close to probe resonating frequency

Small scale radial inflow turbine performance and pre-design maps for Organic Rankine Cycles

Non-linear transfer function identification of pressure probes using Siren Disks

Blade Tio Loss in a Small-Scale Fan

Comparative Evaluation of Foil Bearings with Different Compliant Structures for Improved Manufacturability