A refrigerator wall consists of a fiberglass insulating layer sandwiched between two steel sheets. The thickness of the insulation layer is 80 mm and the thermal conductivity of the fiberglass is 0.045 W/m.K. Each steel sheet is 3.2 mm thick having thermal conductivity of 60 W/m.K. If the ambient temperature is 26 °C and the temperature inside the refrigerator is 4.5 °C, how much heat per unit area is transferred across the wall to the inside of the refrigerator? Take the convective heat transfer coefficient on the outside to be 6 W/m².K and on the inside 5.5 W/m².K.
A refrigerator wall consists of a fiberglass insulating layer sandwiched between two steel sheets. The thickness of the insulation layer is 80 mm and the thermal conductivity of the fiberglass is 0.045 W/m.K. Each steel sheet is 3.2 mm thick having thermal conductivity of 60 W/m.K. If the ambient temperature is 26 °C and the temperature inside the refrigerator is 4.5 °C, how much heat per unit area is transferred across the wall to the inside of the refrigerator? Take the convective heat transfer coefficient on the outside to be 6 W/m².K and on the inside 5.5 W/m².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:A refrigerator wall consists of a fiberglass insulating layer sandwiched between two
steel sheets. The thickness of the insulation layer is 80 mm and the thermal conductivity
of the fiberglass is 0.045 W/m.K. Each steel sheet is 3.2 mm thick having thermal
conductivity of 60 W/m.K. If the ambient temperature is 26 °C and the temperature inside
the refrigerator is 4.5 °C, how much heat per unit area is transferred across the wall to the
inside of the refrigerator? Take the convective heat transfer coefficient on the outside to
be 6 W/m².K and on the inside 5.5 W/m².K.
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