A vehicle carrying refrigeration box is moving with a speed of 24 m/s on a road with ambient temperature of 323 K. The dimensions of box are 3 m(H) × 4 m (W) × 10 m (L). Assume a wall temperature of 283 K and air flow is parallel to the longest side of the box. Neglecting the heat loss from the front side and backside of the box, calculate heat loss from four surfaces. For flow over flat surfaces use Nu = 0.036(Re) 0.8(Pr) 1/3 The properties of air at bulk mean temperature are : = 1.165 kg/m
A vehicle carrying refrigeration box is moving with a speed of 24 m/s on a road with ambient temperature of 323 K. The dimensions of box are 3 m(H) × 4 m (W) × 10 m (L). Assume a wall temperature of 283 K and air flow is parallel to the longest side of the box. Neglecting the heat loss from the front side and backside of the box, calculate heat loss from four surfaces. For flow over flat surfaces use Nu = 0.036(Re) 0.8(Pr) 1/3 The properties of air at bulk mean temperature are : = 1.165 kg/m
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
A vehicle carrying refrigeration box is moving with a speed of 24 m/s on a road with
ambient temperature of 323 K. The dimensions of box are 3 m(H) × 4 m (W) × 10 m (L).
Assume a wall temperature of 283 K and air flow is parallel to the longest side of the box.
Neglecting the heat loss from the front side and backside of the box, calculate heat loss
from four surfaces. For flow over flat surfaces use
Nu = 0.036(Re)
0.8(Pr)
1/3
The properties of air at bulk mean temperature are :
= 1.165 kg/m
3
, Pr = 0.701, cp = 1005 J/kg – K, = 16 × 10–6
m
2
/s
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