Question:-
A furnace wall is constructed as shown in the given figure. That heat transfer coefficient across the other will be

Option (A)
80 W/m2K
Option (B)
40 W/m2K
Option(C)
20 W/m2K
Option(D)
10 W/m2K
Correct Option:
(D)
Question Solution:

= At wall heat flux
= q1 = h(ΔT)CD = (ΔT)AC / åR
= h. x(120-40) = (1000-12°) / {(0.3/3)+(0.3/0.3)}
h = 10W/m2K
question-answer-faq-6070