Thermodynamic modeling and microcalorimetry of nanostructured materials for capacitive thermal management of electronics
Baris, Oksen T.
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https://hdl.handle.net/2142/16194
Description
Title
Thermodynamic modeling and microcalorimetry of nanostructured materials for capacitive thermal management of electronics
Author(s)
Baris, Oksen T.
Issue Date
2010-05-19T18:40:17Z
Director of Research (if dissertation) or Advisor (if thesis)
Sinha, Sanjiv
Department of Study
Mechanical Sci & Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Phase change material (PCM)
capacitive cooling
cooling chip for handheld electronic devices
handheld electronics
electronics cooling
thermal management
transient loads
micro calorimerty
nano calorimetry
heat capacity measurement
Abstract
Transient power dissipation profiles in handheld electronic devices alternate between high and low power states depending on usage. Capacitive thermal management based on phase change materials potentially offers a fan-less thermal management for such transient profiles. However, such capacitive management becomes feasible only if there is a significant enhancement in the enthalpy change per unit volume of the phase change material since existing bulk materials such as paraffin fall short of requirements. In this thesis I propose novel nanostructured thin-film materials that can potentially exhibit significantly enhanced volumetric enthalpy change. Using fundamental thermodynamics of phase transition, calculations regarding the enhancement resulting from superheating in such thin film systems is conducted. Furthermore design of a microfabricated calorimeter to measure such enhancements is explained in detail. This work advances the state-of-art of phase change materials for capacitive cooling of handheld devices.
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