A review of grooved dynamic gas bearings

L Gu, E Guenat, J Schiffmann - Applied …, 2020 - asmedigitalcollection.asme.org
This paper offers an extensive review of publications dealing with the modeling, the design,
and the experimental investigation of grooved dynamic gas-lubricated bearings. Recent …

Multi-objective, multi-period optimization of district energy systems: IV–A case study

S Fazlollahi, G Becker, A Ashouri, F Maréchal - Energy, 2015 - Elsevier
A multi-objective, multi-period model for optimizing the design and operating strategy of
district energy systems is proposed by authors [1]. In the developed model the process and …

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

J Schiffmann, D Favrat - Energy, 2010 - Elsevier
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 …

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

J Schiffmann, D Favrat - International Journal of Refrigeration, 2009 - Elsevier
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 …

A miniature 500 000-r/min electrically driven turbocompressor

D Krähenbühl, C Zwyssig, H Weser… - IEEE Transactions on …, 2010 - ieeexplore.ieee.org
The trend in compressors for fuel cells, heat pumps, aerospace, and automotive heating,
ventilation, and air-conditioning systems is toward ultracompact size and high efficiency …

Multi-objective optimization of grooved gas journal bearings for robustness in manufacturing tolerances

E Guenat, J Schiffmann - Tribology Transactions, 2019 - Taylor & Francis
A tolerancing method highlighting trade-offs against key design variables of mechanical
systems is proposed and applied to herringbone-grooved gas journal bearings. Gas …

Thermal management for gas lubricated, high-speed turbomachinery

LE Olmedo, W Liu, K Gjika, J Schiffmann - Applied Thermal Engineering, 2023 - Elsevier
High-speed turbomachinery is commonly designed to achieve high power densities. Limited
space for active cooling results in a challenging thermal management. A thermal modeling …

Novel high-speed turbo compressor with integrated inverter for fuel cell air supply

M Antivachis, F Dietz, C Zwyssig, D Bortis… - Frontiers in Mechanical …, 2021 - frontiersin.org
Fuel cell technology is continuously gaining ground in E-mobility applications. Fuel cells
require a constant supply of pressurized air, for which high-speed turbo compressors with air …

Experimental investigation of a Thermally Driven Heat Pump based on a double Organic Rankine Cycle and an oil-free Compressor-Turbine Unit

J Demierre, D Favrat, J Schiffmann, J Wegele - International journal of …, 2014 - Elsevier
This paper presents the experimental investigation of a concept of Thermally Driven Heat
Pump (TDHP), based on the coupling of a vapor compression heat pump cycle and an …

Performance potential of gas foil thrust bearings enhanced with spiral grooves

E Guenat, J Schiffmann - Tribology international, 2019 - Elsevier
The upscaling of turbomachinery using gas foil thrust bearings is limited because of their
limited load capacity and the thermal issues linked with very thin film thickness. The …