Steam flowing through a long, thin-walled pipe maintains the pipe wall at uniform temperature of 500K. The pipe is covered with an insulated blanket (orange area in the schematic below). The outer surface of the blanket is exposed to air at 300K. The heat transfer coefficient of the air is assumed to be at 25W/m²/K. r = 50 mm -r2 = 100 mm -k = 0.25 W/m•K 1 Toh T3,1 = 500 K (a) Sketch the thermal circuit of the system. Label all pertinent nodes (using the preceding symbols) and the resistances. (10 pts) (b) What is the heat loss rate per unit length from the pipe? (10 pts) (c) What is the temperature of the outer surface of the blanket (Ts, 2)?

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj