Carbon steel balls (p=7833 kg/m³', k=54 W/m.°C, Cp=0.465 kJ/kg.K) 10 mm in diameter are annealed by heating then first 910 °C in a furnace and then allowing them to cool slowly to 120 °C in ambient air at 36 °C. If the average heat transfer coefficient is 80 W/m2.°C.

Carbon steel balls (p=7833 kg/m³', k=54 W/m.°C, Cp=0.465 kJ/kg.K) 10 mm in diameter are annealed by heating then first 910 °C in a furnace and then allowing them to cool slowly to 120 °C in ambient air at 36 °C. If the average heat transfer coefficient is 80 W/m2.°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.

Chapter3: Transient Heat Conduction

Section: Chapter Questions

Problem 3.13P

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Question

Carbon steel balls (p=7833 kg/m', k=54 W/m.C, Cp=0.465 kJ/kg.K )
10 mm in diameter are annealed by heating then first 910 °C in a
furnace and then allowing them to cool slowly to 120 °C in ambient air
at 36 °C. If the average heat transfer coefficient is 80 W/m?.°C.

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