Concept

Machine thermique

Publications associées (189)

Hole Staggering Effect on the Cooling Performance of Narrow Impingement Channels Using the Transient Liquid Crystal Technique

Peter Ott, Alexandros Terzis, Bernhard Weigand, Guillaume Wagner

This study examines experimentally the cooling performance of narrow impingement channels as could be cast-in in modern turbine airfoils. Full surface heat transfer coefficients are evaluated for the target plate and the sidewalls of the channels using the ...

American Society of Mechanical Engineers2014

Double-diffusive interfaces in Lake Kivu reproduced by direct numerical simulations

Alfred Johny Wüest

Double diffusion transforms uniform background gradients of temperature and salinity into "staircases" of homogeneous mixed layers that are separated by high-gradient interfaces. Direct numerical simulations (DNS) and microstructure measurements are two in ...

Amer Geophysical Union2014

A Thermoelectric Heat Engine with Ultracold Atoms

Jean-Philippe Brantut

Thermoelectric effects, such as the generation of a particle current by a temperature gradient, have their origin in a reversible coupling between heat and particle flows. These effects are fundamental probes for materials and have applications to cooling ...

American Association for the Advancement of Science2013

Heat Exchanger Anchors for Thermo-active Tunnels

Lyesse Laloui, Fabrice Dupray, Thomas Mimouni, Sophie Minon

Shallow geothermal power represents an important energy resource for the heating and cooling of the buildings. Due to relatively low temperature levels encountered at shallow depths in the soil, between 10°C and 20°C, heat pumps are required to process the ...

Swiss Association of Road and Transportation Experts2013

Isothermal transcritical CO2 cycles with TES (thermal energy storage) for electricity storage

Daniel Favrat, Young Min Kim

Recently, TEES (thermo-electric energy storage) systems have been proposed as a new method for large-scale energy storage wherein electric power is stored as thermal energy by using a heat pump and retrieved from the TES (thermal energy storage) by using a ...

Elsevier2013

Advances in the analysis of thermo-active foundations

Lyesse Laloui, Fabrice Dupray, Thomas Mimouni

Energy geostructures are foundations equipped with absorber pipes, exchanging heat with the surrounding ground. They provide a good heat source for the heating and cooling of buildings but the temperature variations they undergo bring new challenges. Therm ...

Taylor & Francis Group2013

Thermodynamic analysis, energy integration and flowsheet improvement of a methanol absorption acid gas removal process

François Maréchal, Emanuele Martelli, Manuele Gatti

This paper analyses the thermodynamic performance and proposes different energy integration schemes for a methanol absorption based acid gas removal process, namely the Rectisol® process specifically designed for the selective removal of H2S and CO2 from c ...

Italian Association of Chemical Engineering - AIDIC2013

Parametric Study for the Cooling of HTS Current Leads Using a Liquid Nitrogen Bath

Rainer Wesche

The analysis of cooling of a binary high T-c superconductor (HTS) 20 kA current lead (CL) operating between 4.5 and 300 K is carried out. We assume that the HTS module is conduction cooled, whereas the cold end of the copper heat exchanger (HEX) is immerse ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Defining “Waste Heat” for industrial processes

François Maréchal, Daniel Favrat, Matthias Bendig

This paper aims at presenting a method for identifying, characterising and quantifying the available waste heat of an industrial system that can be converted into a useful form. A distinction is made between avoidable and unavoidable waste heat. This disti ...

2013

Critical Heat Flux of R134a and R245fa Inside Small-Diameter Tubes

John Richard Thome, Sylwia Szczukiewicz, Cristiano Bigonha Tibiriça

This article presents new experimental critical heat flux results under saturated flow boiling conditions for a macro/microscale tube. The data were obtained in a horizontal 2.20-mm inside diameter stainless-steel tube with heating lengths of 361 and 154 m ...

Taylor & Francis2013

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