Concept

Chaleur (thermodynamique)

Publications associées (951)

Heated membranes for stencil lithography application

This project aims to improve the technique of self-cleaning stencil based on heated membranes and minimize the clogging of stencil’s apertures. To this end, theory on vapor condensation has been developed for Aluminum, Chromium, Titanium, Gold and Platinum ...

2012

Thermocouple Thermal Inertia Effects on Impingement Heat Transfer Experiments Using the Transient Liquid Crystal Technique

Peter Ott, Alexandros Terzis, Bernhard Weigand

The transient liquid crystal technique is widely used for impingement heat transfer experiments. Additionally, due to the difficulty of producing pure temperature steps in the flow, many authors assumed the fluid temperature evolution as a series of step c ...

Institute of Physics2012

Modified Wilson Plots for Enhanced Heat Transfer Experiments: Current Status and Future Perspectives

John Richard Thome, Marcel Christians, Eugene van Rooyen

Heat transfer coefficients for enhanced tubes are typically measured indirectly using the "Wilson plot" method to first characterize the thermal performance of the one side (heating or cooling supply) and then to obtain the heat transfer data for the enhan ...

2012

Combined Density Functional Theory and Monte Carlo Analysis of Monomolecular Cracking of Light Alkanes Over H-ZSM-5

Berend Smit

Density functional calculations applying periodic boundary conditions have been performed to investigate adsorption and cracking of light alkanes (C 3-C 6) on zeolite H-ZSM-5. Intrinsic energy barriers were obtained from single-point calculations by applyi ...

American Chemical Society2012

Design and manufacture of 20 kA HTS current leads for a hybrid magnet system

Pierluigi Bruzzone, Rainer Wesche, Martin Vogel, Stephen Alfred March

A new series connected 25 T hybrid magnet system is being developed by the Helmholtz Zentrum Berlin (HZB) for neutron scattering experiments. In collaboration with CRPP, high temperature superconducting (HTS) current leads have been developed for the power ...

Elsevier Science Bv2012

Falling film evaporation on enhanced tubes, part 2: Prediction methods and visualization

John Richard Thome, Marcel Christians

For falling film evaporation, the most important thermal design parameters that need to be predicted are the onset of dryout, after which a severe degradation in the evaporator performance is found, and the local heat transfer performance in fully wet and ...

2012

Variability of Rainfall in a Semi-Arid Catchment in Burkina Faso

Christine Wiedmann

The climate in the Sahel is marked by the spatial and temporal variability of rainfall. As the agriculture is mainly rainfed in Burkina Faso, the information about rainfall is crucial to help the farmers in their decisions. A network of wireless sensorscop ...

2012

Seasonal sorption heat storage - Research on thermochemical materials and storage performance

Antonio Rubino

Advantages of thermochemical heat storage over conventional heat storage are a higher energy density and loss-free storage of the heat after charging, since the heat is stored in chemical form. At ECN, a thermochemical heat storage is developed for seasona ...

2012

Reduced basis method and error estimation for parametrized optimal control problems with control constraints

Luca Dede'

We propose a Reduced Basis method for the solution of parametrized optimal control problems with control constraints for which we extend the method proposed in Dedè, L. (SIAM J. Sci. Comput. 32:997, 2010) for the unconstrained problem. The case of a linear ...

Springer Verlag2012

Thermal and Visual Operational Characteristics of Multi-Microchannel Evaporators using Refrigerants

Sylwia Szczukiewicz

Two-phase flow operational stability of refrigerants R245fa, R236fa, and R1234ze(E) in 100 x 100 μm2 multi-microchannels for cooling of future high-performance 3D stacked architectures with interlayer cooling has been addressed in the current experimental ...

EPFL2012

Graph Chatbot

Chattez avec Graph Search

Posez n’importe quelle question sur les cours, conférences, exercices, recherches, actualités, etc. de l’EPFL ou essayez les exemples de questions ci-dessous.

AVERTISSEMENT : Le chatbot Graph n'est pas programmé pour fournir des réponses explicites ou catégoriques à vos questions. Il transforme plutôt vos questions en demandes API qui sont distribuées aux différents services informatiques officiellement administrés par l'EPFL. Son but est uniquement de collecter et de recommander des références pertinentes à des contenus que vous pouvez explorer pour vous aider à répondre à vos questions.

Connectez-vous pour utiliser Chat avec Graph Search