The graph below depict the steady state temperature profiles in fins of identica

Question

The graph below depict the steady state temperature profiles in fins of identical length, width and depth. All fins have a base temperature of 100 degree C and are placed in a convective environment of 200 W/m^2 degree C by a convective fluid at 10 degree C. however, the fins are made from different materials and have different types of insulation/boundary conditions placed upon them. Fill the squares with the appropriate graph name, according to the descriptions given. (All y axes have units of degree C, but might have different scales.) The fin which is removing the most total heat from the 100 degree C wall The fin which is adding the most heat to the convective fluid PVC fin with convection on the sides and one end fixed at 20 degree C by conduction at the fin tip Silver fin with convection on the sides and one end fixed at 20 degree C by conduction at the fin tip 20% Nickel steel fin with convection on the sides and an insulated fin tip Silver fin with convection on the sides and an insulated fin tip Silver fin with convection on the sides and tip Silver fin with convection on the sides and tip Silver fin with insulated sides and convection only at the fin tip PVC fin with insulated sides and convection only at the fin tip

Explanation / Answer

1. The fin which is removing the most total heat from the 100 'C wall.

ANSWER: E

2. The fin which is added the most total heat from the convection wall.

3. PCV pin with convection on the side and one end fixed at 20'C by the conduction on the fin tip.

ANSWER: D

4. Silver pin with convection on the side and one end fixed at 20'C by the conduction on the fin tip.

ANSWER: E

5. 20% Nickel steel pin with convection on the side and an insulated fin tip.

ANSWER: G

6. Silver fun with the convection on the side and an insulated fin tip.

ANSWER: F

7. Silver fin with convection on the side and tips.

ANSWER: C

8. Silver fin with insulated sides and convection only at the fin tip.

ANSWER: B

9. PVC pin with insulated sides and convection only at the fin tip.

ANSWER: A

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