A cast iron tank 25 mm thick contains a solution which is kept to boil at 95°C. The outer surface of the tank is maintained at {T}°C, while the inside of the tank is covered with a layer of enamel1 mm thick (k = 0.86 W/mK). The heat transfer coefficient for the boiling solution is 4.5 kW/m2K. Calculate the overall heat transfer coefficient. Use k = 50 W/mK for cast iron. Write your answer to 2 decimal places.

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.
Chapter3: Transient Heat Conduction
Section: Chapter Questions
Problem 3.3P
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P.S. T= 30 degrees

A cast iron tank 25 mm thick contains a solution which is kept to boil at 95°C. The
outer surface of the tank is maintained at {T}°C, while the inside of the tank is
covered with a layer of enamel 1 mm thick (k = 0.86 W/mK). The heat transfer
coefficient for the boiling solution is 4.5 kW/m²K. Calculate the overall heat transfer
coefficient. Usek = 50 W/mk for cast iron. Write your answer to 2 decimal places.
Transcribed Image Text:A cast iron tank 25 mm thick contains a solution which is kept to boil at 95°C. The outer surface of the tank is maintained at {T}°C, while the inside of the tank is covered with a layer of enamel 1 mm thick (k = 0.86 W/mK). The heat transfer coefficient for the boiling solution is 4.5 kW/m²K. Calculate the overall heat transfer coefficient. Usek = 50 W/mk for cast iron. Write your answer to 2 decimal places.
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