4. A cross section of a typical home ceiling is depicted below. Toutside = -8°C Tinside = 22°C Kfiberglass = 0.036 W/m².K Kplaster = 0.824 W/m².K a) b) ho = 23 W/m²K h; = 8 W/m².K Given the properties listed for the materials making up the ceiling, determine how much heat is transferred through the insulation and through the studs. Determine the change in heat transfer if the ceiling was instead designed for R-38 insulation, hence making the insulation and studs 12" thick. 6 cm 15 cm 2 cm -30 cm- Plaster Kwood = 0.17 W/m².K Pine studs Loose fiberglass insulation
4. A cross section of a typical home ceiling is depicted below. Toutside = -8°C Tinside = 22°C Kfiberglass = 0.036 W/m².K Kplaster = 0.824 W/m².K a) b) ho = 23 W/m²K h; = 8 W/m².K Given the properties listed for the materials making up the ceiling, determine how much heat is transferred through the insulation and through the studs. Determine the change in heat transfer if the ceiling was instead designed for R-38 insulation, hence making the insulation and studs 12" thick. 6 cm 15 cm 2 cm -30 cm- Plaster Kwood = 0.17 W/m².K Pine studs Loose fiberglass insulation
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
Related questions
Question
only b
Transcribed Image Text:4. A cross section of a typical home ceiling is depicted below.
Toutside = -8°C
Tinside = 22°C
Kfiberglass = 0.036 W/m².K
Kplaster = 0.824 W/m².K
a)
b)
ho = 23 W/m²K
h; = 8 W/m².K
Given the properties listed for the materials making up the ceiling, determine how
much heat is transferred through the insulation and through the studs.
Determine the change in heat transfer if the ceiling was instead designed for R-38
insulation, hence making the insulation and studs 12" thick.
6 cm
15 cm
2 cm
-30 cm-
Plaster
Kwood = 0.17 W/m².K
Pine studs
Loose fiberglass
insulation
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