3.A), In a manufacturing racility, 2-in brass balls (k = 64.1 Btu/h ft-°F, p = 532 lbm/ft', Cp = 0.092 Btu/lbm-°F) initially at 250°F are quenched in a water bath at 120°F for a period of 2 min and at a rate of 120 balls per minute. The convection heat transfer coefficient is h= 42 Btu/h ft2.°F. (a) Determine the temperature of the balls after quenching. (b) Determine the rate at which heat must be removed from the water in order to keep its temperature constant at 120°F.
3.A), In a manufacturing racility, 2-in brass balls (k = 64.1 Btu/h ft-°F, p = 532 lbm/ft', Cp = 0.092 Btu/lbm-°F) initially at 250°F are quenched in a water bath at 120°F for a period of 2 min and at a rate of 120 balls per minute. The convection heat transfer coefficient is h= 42 Btu/h ft2.°F. (a) Determine the temperature of the balls after quenching. (b) Determine the rate at which heat must be removed from the water in order to keep its temperature constant at 120°F.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:3.A)
In a manufacturing racility, 2-in brass balls (k = 64.1 Btu/h ft-°F, p= 532 lbm/ft’, Cp = 0.092 Btu/lbm°F)
initially at 250°F are quenched in a water bath at 120°F for a period of 2 min and at a rate of 120 balls per
minute. The convection heat transfer coefficient is h = 42 Btu/h ft2.°F.
(a) Determine the temperature of the balls after quenching.
(b) Determine the rate at which heat must be removed from the water in order to keep its temperature
constant at 120°F.
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