Consider steady heat transfer between two large parallel plates at constant peratures of T1= 290 K and 72 = 150 K that are L= 2 cm apart. Assuming the faces to be black (emissivity 1), determine the rate of heat transfer between the tes per unit surface area, assuming the gap between the plates is (a) filled with nospheric air k = 0.01979 W/m °C, (b) evacuated, (c) filled with fiberglass ulation and k = 0.036 W/m-°C, and (d) filled with superinsulation having an parent thermal conductivity of 0.00015 W/m. °C
Consider steady heat transfer between two large parallel plates at constant peratures of T1= 290 K and 72 = 150 K that are L= 2 cm apart. Assuming the faces to be black (emissivity 1), determine the rate of heat transfer between the tes per unit surface area, assuming the gap between the plates is (a) filled with nospheric air k = 0.01979 W/m °C, (b) evacuated, (c) filled with fiberglass ulation and k = 0.036 W/m-°C, and (d) filled with superinsulation having an parent thermal conductivity of 0.00015 W/m. °C
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter11: Heat Transfer By Radiation
Section: Chapter Questions
Problem 11.32P
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