Chapter 3, Problem 92P

Ice slurry is being transported in a pipe $(k=15\text{ W/m}\text{.K,}\text{}{\text{ D}}_{\text{i}}\text{ =2}{\text{.5 cm, D}}_{\text{o}}\text{=3 cm and L= 5 m)}$ and with an iliner surface temperature of 0°C. The ambient condition surrounding the pipe has a temperature of 20°C, a convection heat transfer coefficient of 10 V1in2K, and a dew point of 10°C. If the outer surface temperature of the pipe drops below the dew point. condensation can occur on the surface. Since this pipe is located in a vicinity of high-voltage devices, water droplets from the condensation can create an electrical hazard. To prevent an electrical accident, the pipe surface needs to be insulated. Detennine the insulation thickness for the pipe using a material with $\text{k = 0}{\text{.95W/m}}^{}\text{.K}$ to prevent the outer surface temperature from dropping below the dew point.