In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75°C as it moves at 0.19 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 p = 1000 kg/m³, cp = 4000 J/kg-K, µ = 2× 103 kg/s-m, k = 0.8 W/m-K, and Pr = 10. Determine the required heat flux, W/m². q" = i W/m2 Determine the surface temperature at the tube exit, in °C. i °C
In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75°C as it moves at 0.19 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 p = 1000 kg/m³, cp = 4000 J/kg-K, µ = 2× 103 kg/s-m, k = 0.8 W/m-K, and Pr = 10. Determine the required heat flux, W/m². q" = i W/m2 Determine the surface temperature at the tube exit, in °C. i °C
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.
Chapter6: Forced Convection Over Exterior Surfaces
Section: Chapter Questions
Problem 6.55P
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