Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 4 (Q.No. 17)
17.
For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would
Discussion:
4 comments Page 1 of 1.
DEBANTAM said:
6 years ago
Answer should be A, as here pipe is mentioned. Not tube. For pipe, thickness generally greater than critical thickness automatically. If you add thickness, it will decrease anyway. Option D is correct for TUBES.
DPK said:
7 years ago
Here they does't say that the insulation radius is increased beyond critical radius and which means D is the correct answer.
Suraj said:
9 years ago
If critical radius less the outer radius then first increased then decrease to the minimum value, again increasing of thickness only depend on the critical radius value.
Shan Rana said:
1 decade ago
Wrong answer, correct answer is first decrease then increase. Heat lose increases when thickness of insulation exceed critical insulation radius.
(2)
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