Master Thesis Online
Turbulent heat transfer analysis of supercritical carbon dioxide close to the pseudo-critical point in microchannels under non-uniform heat flux boundary conditions
Schyns, Bertrand 
Promotor(s) :
Lemort, Vincent
Date of defense : 7-Sep-2020/9-Sep-2020 • Permalink : http://hdl.handle.net/2268.2/10386
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| Title : | Turbulent heat transfer analysis of supercritical carbon dioxide close to the pseudo-critical point in microchannels under non-uniform heat flux boundary conditions |
| Translated title : | [fr] Analyse de l'échange de chaleur turbulent du dioxyde de carbone supercritique proche de son point pseudo-critique dans des microcanaux soumis à des conditions limites de flux de chaleur non-uniformes |
| Author : | Schyns, Bertrand
|
| Date of defense : | 7-Sep-2020/9-Sep-2020 |
| Advisor(s) : | Lemort, Vincent
|
| Committee's member(s) : | Ngendakumana, Philippe
Dewallef, Pierre
Fronk, Brian |
| Language : | English |
| Number of pages : | 81 |
| Keywords : | [en] Supercritical carbon dioxide [en] Thermal management [en] Pseudo-critical point [en] Microchannel [en] Transient regime |
| Discipline(s) : | Engineering, computing & technology > Energy |
| Research unit : | Oregon State University, Thermal Energy Systems and Transport (TEST) Laboratory |
| Name of the research project : | Turbulent heat transfer analysis of supercritical carbon dioxide close to the pseudo-critical point in microchannels under non-uniform heat flux boundary conditions |
| Target public : | Researchers Professionals of domain Student |
| Institution(s) : | Université de Liège, Liège, Belgique |
| Degree: | Master en ingénieur civil électromécanicien, à finalité spécialisée en énergétique |
| Faculty: | Master thesis of the Faculté des Sciences appliquées |
Abstract
[en] With the development of ever more compact electronics device and the need to manage the increasing heat flux, new potential technologies are tested. This studyinvestigates to use a microchannel-based heat exchanger using supercritical carbon dioxide near the critical point. The first part of this work consists is an experimental study of the heat exchanges steady-state to determine the influence of the different parametersover the heat exchange. It is followed by an experimental study in transient regimes to analyse the response of the system to transient heat flux or transient mass flux After the experimental part, a predictive model is developed for the steady-state conditions and anohter model for the transient conditions. They are compared to the experimental results. Finally, some conclusions are drawn considering the performance of this technology in the application of electronics cooling.
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