Explore BrainMass
Share

Explore BrainMass

    Addition of heat and insulators

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Explain the following terms;
    (i) critical radius of insulation.
    (ii) economic lagging thickness.
    An electric wire has a diameter of 1.3 mm and is to be covered with insulation 2.5 mm thick of thermal conductivity 0.35 W/mK. If the outside surface heat transfer coefficient is 15.0 W/m2K, calculate the critical radius of insulation. Would the addition of the insulation expect to increase or decrease the rate of heat transfer from the wire? Justify your answer.

    © BrainMass Inc. brainmass.com October 10, 2019, 3:59 am ad1c9bdddf
    https://brainmass.com/engineering/electrical-engineering/addition-heat-insulators-444380

    Solution Preview

    The solution is in the attached word file. Let me know if you have any questions/comments.

    Addition of heat:
    Explain the following terms;
    (i) critical radius of insulation.
    (ii) economic lagging thickness.

    An electric wire has a diameter of 1.3 mm and is to be covered with insulation 2.5 mm thick of thermal conductivity 0.35 W/mK. If the outside surface heat transfer coefficient is 15.0 W/m2K, calculate the critical radius of insulation. Would the addition ...

    Solution Summary

    This solution helps explain the critical radius of insulation and economic lagging thickness. It also helps calculate the increase of decrease in the rate of heat transfer would result from the addition of the insulation.

    $2.19