(Solved): Steam flowing through a long, thin-walled pipe (as shown in Figure 1) maintains the pipe wall at a ...

Steam flowing through a long, thin-walled pipe (as shown in Figure 1) maintains the pipe wall at a uniform temperature of 500 K. The pipe is covered with an insulation blanket comprised of two different materials, A and B. The interface between the two materials may be assumed to have an infinite contact resistance, and the entire outer surface is exposed to air for which T. = 300 K and h= 25 W/m².K. (a) Sketch the thermal circuit of the system. Label (using the preceding symbols) all pertinent nodes and resistances. [15 marks] (b) For the prescribed conditions, what is the total heat loss from the pipe? What are the outer surface temperatures T3,2(A) and T5,2(B)? ? -r? = 50 mm r2 = 100 mm T5,2(A) -ka = 2 W/m.k Ts,218) - kg = 0.25 W/m.K B Toanh T5,1 = 500 K Figure 1: Steam flowing through a pipe.