Parvinbhai A long iron rod (p = 7870 kg/m³, cp=447 J/kg-K, k = 80.2 W/mK, and a = 23.1 x 10-6 m²/s) with diameter of 25 mm is initially heated toa uniform temperature of 700°C. The iron rod is then quenched in a large water bath that is maintained at constant temperature of50°C and convection heat transfer coefficient of 128 W/m2K. Determine the time required for the iron rod surface temperature to coolto 207°C. Solve this problem using analytical one-term approximation method.Water, 50°Ch = 128 W/m²KThe time required for the iron rod surface temperature to cool to 207°C isIron rodseconds.

A long iron rod (p = 7870 kg/m³, cp = 447 J/kg∙K, k = 80.2 W/m-K, and a = 23.1 × 10- m/s) with diameter of 25 mm is initially heated to a uniform temperature of 700°C. The iron rod is then quenched in a large water bath that is maintained at constant temperature of 50°C and convection heat transfer coefficient of 128 W/m²K. Determine the time required for the iron rod surface temperature to cool to 207°C. Solve this problem using analytical one-term approximation method. Water, 50°C h = 128 W/m²K Iron rod The time required for the iron rod surface temperature to cool to 207°C is | seconds.

A long iron rod (p = 7870 kg/m³, cp = 447 J/kg∙K, k = 80.2 W/m-K, and a = 23.1 × 10- m/s) with diameter of 25 mm is initially heated to a uniform temperature of 700°C. The iron rod is then quenched in a large water bath that is maintained at constant temperature of 50°C and convection heat transfer coefficient of 128 W/m²K. Determine the time required for the iron rod surface temperature to cool to 207°C. Solve this problem using analytical one-term approximation method. Water, 50°C h = 128 W/m²K Iron rod The time required for the iron rod surface temperature to cool to 207°C is | seconds.

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 7.36P

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