Required information Air flows in a pipe under fully developed conditions with an average velocity of 1.25 m/s and a temperature of 24°C. The pipe's inner diameter is 4 cm, and its length is 4 m. The first half of the pipe is kept at a constant wall temperature of 100°C. The second half of the pipe is subjected to a constant heat flux of 200 W. The properties of air at 80°C are p = 0.9994 kg/m³, k = 0.02953 W/m-K, v= 2.097 x 10-5 m²/s, cp=1008 J/kg-K, and Pr = 0.7154.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Required information
Air flows in a pipe under fully developed conditions with an average velocity of 1.25 m/s and a temperature of 24°C. The
pipe's inner diameter is 4 cm, and its length is 4 m. The first half of the pipe is kept at a constant wall temperature of 100°C.
The second half of the pipe is subjected to a constant heat flux of 200 W. The properties of air at 80°C are p = 0.9994
kg/m³, k = 0.02953 W/m-K, v= 2.097 x 10-5 m²/s, cp=1008 J/kg-K, and Pr = 0.7154.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
Air
1.25 m/s
2m
T, = 100°C
D = 4 cm
2 m
Q₁ = 200 W
a) Determine the air temperature at the 2 m length.
The air temperature at the 2 m length is
b) Determine the air temperature at the exit.
The air temperature at the exit is
°C.
c) Determine the total heat transfer to the air.
The total heat transfer to the air is
W.
Transcribed Image Text:! Required information Air flows in a pipe under fully developed conditions with an average velocity of 1.25 m/s and a temperature of 24°C. The pipe's inner diameter is 4 cm, and its length is 4 m. The first half of the pipe is kept at a constant wall temperature of 100°C. The second half of the pipe is subjected to a constant heat flux of 200 W. The properties of air at 80°C are p = 0.9994 kg/m³, k = 0.02953 W/m-K, v= 2.097 x 10-5 m²/s, cp=1008 J/kg-K, and Pr = 0.7154. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Air 1.25 m/s 2m T, = 100°C D = 4 cm 2 m Q₁ = 200 W a) Determine the air temperature at the 2 m length. The air temperature at the 2 m length is b) Determine the air temperature at the exit. The air temperature at the exit is °C. c) Determine the total heat transfer to the air. The total heat transfer to the air is W.
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