(1) An asbestos pad is rectangle in cross section, measuring 3 cm x 10 cm on a side at its small end, increasing linearly to 6 x 20 cm on a side at the large end. The pad is 20 cm high. If the small end is held at 650 K and the large end at 350 K, what heat-flow rate will be obtained if the four sides are insulated? Assume one-dimensional heat conduction. The thermal conductivity of asbestos may be taken as 0.18 W/m K.
(1) An asbestos pad is rectangle in cross section, measuring 3 cm x 10 cm on a side at its small end, increasing linearly to 6 x 20 cm on a side at the large end. The pad is 20 cm high. If the small end is held at 650 K and the large end at 350 K, what heat-flow rate will be obtained if the four sides are insulated? Assume one-dimensional heat conduction. The thermal conductivity of asbestos may be taken as 0.18 W/m K.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:(1) An asbestos pad is rectangle in cross section, measuring 3 cm x 10 cm on a side at its small
end, increasing linearly to 6 x 20 cm on a side at the large end. The pad is 20 cm high. If the
small end is held at 650 K and the large end at 350 K, what heat-flow rate will be obtained if
the four sides are insulated? Assume one-dimensional heat conduction. The thermal
conductivity of asbestos may be taken as 0.18 W/m K.
(2) Solve Problem (1) for the case of the larger cross section exposed to the higher temperature
and the smaller end held at 350 K.
(3). Solve Problem (1) if the asbestos pad has a 2.0 cm (diameter) steel bolt running through
its center. Steel k is 40 W/m.K.
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