In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75°C as it moves at 0.22 m/s through a straight thin-walled stainless steel tube of 12.7-mm diameter. A uniform heat flux is maintained by an electric resistance heater wrapped around the outer surface of the tube. If the tube is 10 m long, what is the required heat flux? If fluid enters the tube with a fully developed velocity profile and a uniform temperature profile, what is the surface temperature at the tube exit? Fluid properties may be approximated as ρ=ρ= 1000 kg/m3, cp=cp= 4000 J/kg·K, μ=μ= 2 × 10-3 kg/s·m, k=k= 0.8 W/m·K, and Pr=P⁢r= 10.

In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75°C as it moves at 0.22 m/s through a straight thin-walled stainless steel tube of 12.7-mm diameter. A uniform heat flux is maintained by an electric resistance heater wrapped around the outer surface of the tube. If the tube is 10 m long, what is the required heat flux? If fluid enters the tube with a fully developed velocity profile and a uniform temperature profile, what is the surface temperature at the tube exit? Fluid properties may be approximated as ρ=ρ= 1000 kg/m3, cp=cp= 4000 J/kg·K, μ=μ= 2 × 10-3 kg/s·m, k=k= 0.8 W/m·K, and Pr=P⁢r= 10.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.43P: 7.43 Liquid sodium is to be heated from 500 K to 600 K by passing it at a flow rate of 5.0 kg/s...

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