Question

PROBLEM 4 (45 pts) A long angle steel bar is inserted inside a large cylinder as shown below. The surface areas are A - 100 m2, A- 13 m2, As- 5 m2, A-8 m2. The surface temperatures for Ai, A2, As, and As surfaces are Ti 100 K, T2 - 500 K, T 500 K, T-500 K, respectively. Assume that the surfaces are gray surfaces and emissivity is 0.8 for all surfaces throughout the problem. Assume the surfaces have the same depth. rface tenm A1 A4 (a) (15 pts) Sketch a radiation heat transfer network circuit. Clearly denote each node with its temperature as well as the radiation thermal resistances between nodes.

A thru c please

Answer 1

We ho 2. 4 ЗАзе An F23 A2e 3 A4F43 Ai Fi2 4- Ai Fi4

We Fhou het, itself is 3ead. So that F22-F33- F44:0

f saciaston oem 2,3 and 12ーーート21 12 0.13 1o O F23-0 31 "34 43-0

Past -e) → a3-1-2802-44 w/m2