Thermal management
Introduction
The Thermal Management research line focuses on developing advanced predictive lumped models for cooling/heating applications, based on experimental studies in dedicated test benches and on CFD-Conjugate Heat Transfer simulations for in-depth understanding of heat losses and temperature distributions.
Innovative cooling strategies
- CFD temperature distribution in pouch cells under immersion cooling represented by streamlines.
- Testbench detail representation for visualization of nucleate boiling in minichannel.
- Close-up of testbench for measurement of nucleate boiling in spark-ignition engine pre-chamber.
- Incipient nucleate boiling: from bubble formation to bubble detachment.
- Video of bubble formation: visualization with high-speed camera.
Fluid and heat flow in enclosures
- Air-flow motion within Diesel locomotive enclosure.
- Passengers’ train wagon CAD for air conditioning study
- Temperature distribution in a car cabin for an air entry with speed of 1 m/s and a heating resistance of 4W
- Temperature distribution in a car cabin for an air entry with speed of 6 m/s and a heating resistance of 4W
Applications to EVs
- Temperature distribution resulting from CFD-CHT calculation of plate cooling of cylindrical cells module (2.5 C)
- Set-up for climatic chamber tests of a prismatic cell including thermographic imaging
- Test configuration for cooling plate thermal performance evaluation
- Thermal imaging of battery cell operation: 1C charge (left) and 1.5C discharge (right)
- Electric parameters maps for ECM model
- Electric motor stator instrumented with temperature sensor
- Electric motor CFD calculation: specific ohmic heat source
- Distribution of the magnetic flux density on the rotor of an Internal Permanent Magnet Synchronous Motor
- Water-Jacket cooling effect on the stator yoke of an electric motor
- Thermocouples installation in electrified vehicles for Mobile Air Conditioning testing campaign, performed at the European Commission's Joint Research Centre (collaboration)
- Pressure-Enthalpy diagram of one simulated loop of EV refrigeration cycle
Conventional cooling methods
- Cooling plate hydraulic pre-design for optimal cooling and pressure loss
- Cooling plate pre-design: optimal positioning of cylindrical battery cells
- CFD results of pressure distribution on battery module cooling plate: ∆p=0.14 bar for 10 l/min flow rate
- CFD results of temperature distribution in cooling plate solid and fluid: ∆p=0.14 bar for 10 l/min flow rate; Heat source: 832 W; Convective heat transfer coefficient: 4020 W/m2K
- Final design of cooling plate and battery module enclosure
- Side cooling plate with mini channels: CFD hydraulic inlet characterization
- Side cooling plate with mini channels: CFD hydraulic outlet characterization
- Side cooling plate with mini channels: CFD results of temperature distribution
- Two fluids heat exchanger
- Coolant flow path inside the shell-tubes HEX
- PIV testing of a SACOC heat exchanger for turbofan aeroengines
- Numerical simulation of the temperature field in a SACOC heat exchanger
- Results of LDA aerodynamic testing of a SACOC heat exchanger
- Thermographic analysis of a SACOC heat exchanger
Engine heat transfer
- Spatial temperature distribution of Diesel engine piston for different cooling oil pressures
- Comparison of temperature wall distribution in coated and uncoated piston (10CAD)
- Gas temperature field close to piston top surface at 2000 rpm - 4 bar at 20 CAD for uncoated piston (left) and coated piston (right)
- Temperature distribution on top piston surface during the combustion at 3000 rpm - 7 bar: uncoated engine and coated engine
- Heat transfer balance: comparison between metallic and coated engines at 3000 rpm -7 bar
Facilities
Battery Laboratory - Performance and safety
Computational Fluid Dynamics
High Mass Flow Hot Gas Stand
Multifunctional efficient and dynamic altitude simulator - MEDAS
