Presenter(s)

    Daniel E. Forero

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    Description

    Thermal management of USAF system & platforms requires thermal energy storage materials (TES) that can rapidly store large transient pulses of heat. Composites of salt hydrates and graphitic foam offer high thermal storage capabilities and high thermal conductivities. However, thermal transport across graphite-hydrous salt interfaces may limit the heat transfer through such a composite. Here, laser flash analysis was used to measure thermal diffusivity across graphite-water-graphite stacks and effective diffusivity of water layer and interface was determined. The effect of surfactant-water mixtures and two different surface treatments were analyzed. For all cases, including pure water interfacial layers, the measured effective diffusivity was lower than the accepted literature value for pure water (by 20% in the case of pure water). In the case of the surfactant-graphite mixtures, effective diffusivity is a function of the surfactant concentration. These differences suggest the importance of interfaces within composites.

    Publication Date

    4-18-2012

    Project Designation

    Independent Research

    Primary Advisor

    Charles E. Browning

    Primary Advisor's Department

    Minority Engineering Program

    Keywords

    Stander Symposium project

    Thermal Transport Across Watre-Graphite Interfaces

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