Thermodynamic modeling and microcalorimetry of nanostructured materials for capacitive thermal management of electronics

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.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2010

Author dc:creator

• Baris, Oksen T.

Contributors dc:contributor

• Sinha, Sanjiv

• 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

Statement dc:rights

• Copyright 2010 Baris T Oksen

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/16194

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/16194