Publications de Etienne Costa-Patry

On-Chip Two-Phase Cooling with Refrigerant 85 mu m-Wide Multi-Microchannel Evaporator Under Hot-Spot Conditions

John Richard Thome, Stefano Nebuloni, Jonathan Olivier, Etienne Costa-Patry

Hot-spots are present in micro-electronics and are challenging to cool effectively. This paper presents highly nonuniform heat flux measurements obtained for a pseudo-CPU with 35 local heaters and temperature sensors cooled by a silicon multi-microchannel ...

2012

On-Chip Cooling of Hot-Spots with a Copper Micro-Evaporator

John Richard Thome, Etienne Costa-Patry

Hot-spots are present in micro-electronics and are challenging to cool effectively. Using a copper micro-evaporator mounted on a pseudo-chip, on-chip two-phase cooling was found to very effectively cool the hot-spots without inducing flow instabilities. Bu ...

Ieee2012

Flow Boiling of R134a in a Multi-Microchannel Heat Sink with Hotspot Heaters for Energy-Efficient Microelectronic CPU Cooling Applications

John Richard Thome, Jonathan Olivier, Etienne Costa-Patry, Yassir Madhour, Bruno Michel

This paper focuses on two-phase flow boiling of refrigerant R134a inside a copper multi-microchannel heat sink for microelectronic central processing unit cooling applications. The heat sink is composed of 100 parallel microchannels, 100 mu m wide, 680 mu ...

2011

Two-phase flow of refrigerants in 85μm-wide multi-microchannels: Part II – Heat transfer with 35 local heaters

John Richard Thome, Jonathan Olivier, Etienne Costa-Patry, Bruno Michel

This article is the second part of a study on flow boiling of R236fa and R245fa. This part presents the heat transfer coefficients obtained in a 12.7 mm silicon evaporator composed of 135 microchannels with 85 mu m wide and 560 mu m high channels separated ...

Elsevier2011

Cooling High Heat Flux Micro-Electronic Systems using Refrigerants in High Aspect Ratio Multi-Microchannel Evaporators

Etienne Costa-Patry

Improving the energy efficiency of cooling systems can contribute to reduce the emission of greenhouse gases. Currently, most microelectronic applications are air-cooled. Switching to two-phase cooling systems would decrease power consumption and allow for ...

EPFL2011