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1831 = 1. Air at p 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet temperature of Tmi = 100°C. A constant heat flux is applied to the air from the tube surface. The air mass flow rate is -6 m = 135 x 10 kg/s. to STUS (a) If the tube surface temperature at the exit is oftios 160°C, determine the heat rate entering the brTs,o = sdf on tube. Evaluate properties at T = 400 K. -15V0 (b) If the tube length of part (a) were reduced to L = 0.2 m, how would flow conditions at the tube exit be affected? Would the value of the heat transfer coefficient at the tube exit be greater than, equal to, or smaller than the heat transfer coefficient for part (a)? Cong diamete (c) If the flow rate of part (a) were increased by a factor of 10, would there be a difference in flow conditions at the tube exit? Would the value of the heat transfer coefficient at the tube exit be greater than, equal to, or smaller than the heat transfer coefficient for den part (a)?

1831 = 1. Air at p 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet temperature of Tmi = 100°C. A constant heat flux is applied to the air from the tube surface. The air mass flow rate is -6 m = 135 x 10 kg/s. to STUS (a) If the tube surface temperature at the exit is oftios 160°C, determine the heat rate entering the brTs,o = sdf on tube. Evaluate properties at T = 400 K. -15V0 (b) If the tube length of part (a) were reduced to L = 0.2 m, how would flow conditions at the tube exit be affected? Would the value of the heat transfer coefficient at the tube exit be greater than, equal to, or smaller than the heat transfer coefficient for part (a)? Cong diamete (c) If the flow rate of part (a) were increased by a factor of 10, would there be a difference in flow conditions at the tube exit? Would the value of the heat transfer coefficient at the tube exit be greater than, equal to, or smaller than the heat transfer coefficient for den part (a)?

Introduction to Chemical Engineering Thermodynamics
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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1831 = 1. Air at p 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet temperature of Tmi = 100°C. A constant heat flux is applied to the air from the tube surface. The air mass flow rate is -6 m = 135 x 10 kg/s. to STUS (a) If the tube surface temperature at the exit is oftios 160°C, determine the heat rate entering the brTs,o = sdf on tube. Evaluate properties at T = 400 K. -15V0 (b) If the tube length of part (a) were reduced to L = 0.2 m, how would flow conditions at the tube exit be affected? Would the value of the heat transfer coefficient at the tube exit be greater than, equal to, or smaller than the heat transfer coefficient for part (a)? Cong diamete (c) If the flow rate of part (a) were increased by a factor of 10, would there be a difference in flow conditions at the tube exit? Would the value of the heat transfer coefficient at the tube exit be greater than, equal to, or smaller than the heat transfer coefficient for den part (a)?
Transcribed Image Text:1831 = 1. Air at p 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet temperature of Tmi = 100°C. A constant heat flux is applied to the air from the tube surface. The air mass flow rate is -6 m = 135 x 10 kg/s. to STUS (a) If the tube surface temperature at the exit is oftios 160°C, determine the heat rate entering the brTs,o = sdf on tube. Evaluate properties at T = 400 K. -15V0 (b) If the tube length of part (a) were reduced to L = 0.2 m, how would flow conditions at the tube exit be affected? Would the value of the heat transfer coefficient at the tube exit be greater than, equal to, or smaller than the heat transfer coefficient for part (a)? Cong diamete (c) If the flow rate of part (a) were increased by a factor of 10, would there be a difference in flow conditions at the tube exit? Would the value of the heat transfer coefficient at the tube exit be greater than, equal to, or smaller than the heat transfer coefficient for den part (a)?
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