Calculate the heat lost from the cylinder. Repeat for a wall temperature of 80°F. What do you conclude from these calculations?
Calculate the heat lost from the cylinder. Repeat for a wall temperature of 80°F. What do you conclude from these calculations?
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.
Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.22P
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A vertical cylinder 6 ft tall and 1 ft in diameter might be used to approximate a man for heat-transfer purposes. Suppose the surface temperature of the cylinder is 78°F, h=2 Btu/h · ft2 . °F, the surface emissivity is 0.9, and the cylinder is placed in a large room where the air temperature is 68°F and the wall temperature is 45°F. Calculate the heat lost from the cylinder. Repeat for a wall temperature of 80°F. What do you conclude from these calculations?
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Assuming that humidity is not a factor, explain this apparent anomaly in “temperature
comfort.
4. A vertical cylinder 6 ft tall and 1 ft in diameter might be used to approximate a man for
heat-transfer purposes. Suppose the surface temperature of the cylinder is 78°F, h = 2
%3D
Btu/h · ft2 ·°F, the surface emissivity is 0.9, and the cylinder is placed in a large room
where the air temperature is 68•F and the wall temperature is 45°F. Calculate the heat lost
from the cylinder. Repeat for a wall temperature of 80°F. What do you conclude from
these calculations?
1:52 pm
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1 + 4) ENG
30°C Rain showers
29/10/2021
Transcribed Image Text:A Case Study 1
* (1) Messenger
E Untitled document - Google Doc X
f (3) Facebook
+
8 https://classroom.google.com/u/0/c/Mzc4MzQwOTc3NjM1/m/NDIXNZY1MZEWOTQ5/details
Sign in
qauny
Assuming that humidity is not a factor, explain this apparent anomaly in “temperature
comfort.
4. A vertical cylinder 6 ft tall and 1 ft in diameter might be used to approximate a man for
heat-transfer purposes. Suppose the surface temperature of the cylinder is 78°F, h = 2
%3D
Btu/h · ft2 ·°F, the surface emissivity is 0.9, and the cylinder is placed in a large room
where the air temperature is 68•F and the wall temperature is 45°F. Calculate the heat lost
from the cylinder. Repeat for a wall temperature of 80°F. What do you conclude from
these calculations?
1:52 pm
O Type here to search
梦 (
1 + 4) ENG
30°C Rain showers
29/10/2021
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