Fundamentals of Heat and Mass Transfer
7th Edition
ISBN: 9780470501979
Author: Frank P. Incropera, David P. DeWitt, Theodore L. Bergman, Adrienne S. Lavine
Publisher: Wiley, John & Sons, Incorporated
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Chapter 1, Problem 1.71P
(a)
To determine
The case temperature when
(b)
To determine
To Plot: The maximum allowable heat dissipation for variation in
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A spherical object with a temperature of 700 oC, made of carbon steel with a diameter of 3 cm, will be cooled to 370 oC by an air flow with a temperature of 35 oC and a heat convection coefficient of 90 W/m2K. Calculate the time (s) required to cool the body, ignoring the temperature gradient inside the body and making any other assumptions you deem necessary. The heat transmission coefficient of carbon steel can be 45 W/mK, its density is 7800 kg/m3 and its specific heat is 480 J/kgK.
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Chapter 1 Solutions
Fundamentals of Heat and Mass Transfer
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