Subject is Heat Transfer. Please show all work.

1. (20) Fouling resistance for a heat exchanger is shown below. The fouling is occurring on the inside of a pipe that is 5 cm in inside diameter. If the thermal conductivity of the fouling material is 0.025 w/(m-K). Calculate the thickness of the material from the highest fouling factor shown in this plot. That is, convert the fouling resistance to the equivalent thickness of material that would be equal to this fouling. 0.8 0.6 + 0.15 BK -0.05 BK X 0.025 BK O 0.05 EU 0.025 Eu X 0.05 SP 0.05 (Eu+BK) 0.4 + Fouling factor, Rim? K/kw 0.2+ 0 -0.2+ 20 40 -0.4 0 10 30 Time min x 10-3 What does this tell you about the amount of material needed to affect the heat transfer in a heat exchanger