13.2-3. Heat Loss by Convection and Conduction. A glass window with an area of 0.557 m² is installed in the wooden outside wall of a room. The wall dimensions are 2.44 × 3.05 m. The wood has a k of 0.1505 W/mK and is 25.4 mm thick. The glass is 3.18 mm thick and has a k of 0.692. The inside room temperature is 299.9 K (26.7°C) and the outside air temperature is 266.5 K. The convection coefficient h; on the inside wall of the glass and the wood is estimated as 8.5 W/m²K; the outside ho is also estimated as 8.5 for both surfaces. Calculate the heat loss through the wooden wall, through the glass, and the total. Ans. 569.2 W (wood) (1942 btu/h), 77.6 W (glass) (265 btu/h), 646.8 W (total) (2207 btu/h)
13.2-3. Heat Loss by Convection and Conduction. A glass window with an area of 0.557 m² is installed in the wooden outside wall of a room. The wall dimensions are 2.44 × 3.05 m. The wood has a k of 0.1505 W/mK and is 25.4 mm thick. The glass is 3.18 mm thick and has a k of 0.692. The inside room temperature is 299.9 K (26.7°C) and the outside air temperature is 266.5 K. The convection coefficient h; on the inside wall of the glass and the wood is estimated as 8.5 W/m²K; the outside ho is also estimated as 8.5 for both surfaces. Calculate the heat loss through the wooden wall, through the glass, and the total. Ans. 569.2 W (wood) (1942 btu/h), 77.6 W (glass) (265 btu/h), 646.8 W (total) (2207 btu/h)
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
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Transcribed Image Text:13.2-3. Heat Loss by Convection and Conduction. A glass window with
an area of 0.557 m² is installed in the wooden outside wall of a
room. The wall dimensions are 2.44 × 3.05 m. The wood has a k of
0.1505 W/mK and is 25.4 mm thick. The glass is 3.18 mm thick
and has a k of 0.692. The inside room temperature is 299.9 K
(26.7°C) and the outside air temperature is 266.5 K. The convection
coefficient h; on the inside wall of the glass and the wood is
estimated as 8.5 W/m²K; the outside ho is also estimated as 8.5 for
both surfaces. Calculate the heat loss through the wooden wall,
through the glass, and the total.
Ans. 569.2 W (wood) (1942 btu/h), 77.6 W (glass) (265 btu/h), 646.8 W
(total) (2207 btu/h)
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