Effect of Air Movement on Thermal Resistance of Loose-Fill Thermal Insulations

    Published: Jan 1983

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    An apparatus to measure the heat flux through horizontally applied loose-fill insulations with air movement above the insulation has been constructed and used to test specimens of loose-fill cellulosic, fiberglass, and rock wool insulations. Heat flux divided by the temperature difference across insulation specimens was measured for air velocities up to 92 cm/s. An increase in the heat flux term with air movement was observed and correlated with air velocity and specimen density. The magnitude of the increase in the heat flux term was greatest for the specimen of low-density fibergalss insulation.


    thermal insulation, loose-fill insulation, thermal resistance, heat flux, convection, mineral fiber insulation, cellulosic insulation, blown insulation

    Author Information:

    Yarbrough, DW
    Tennessee Technological University, Cookeville, Tenn.

    Toor, IA
    Tennessee Technological University, Cookeville, Tenn.

    Paper ID: STP29468S

    Committee/Subcommittee: C16.23

    DOI: 10.1520/STP29468S

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