Q4) Consider a tube-and-shell heat exchanger consisting of one single shell and one tube, each executing one pass. The hot air of 100°C enters the shell at the rate of 1m³/s. The water of 10°C enters the tube at a mass rate of 0.16kg/s. The density and the heat capacity of the hot air are assumed to constant, Pair = 0.9461 kg/m³ and Cp, air = 1011 J/kg. °C. The density and the heat capacity of the cold water are assumed constant, Pwater = 999.65 kg/m³ and Cp.water = 4190 J/kg. °C. Please note you should show your calculations for all of your answers to the following questions. Parallel-flow Thimni Hot air Counter-flow Tho.mno4 comco Tho, mno Answer the following questions: a) b) c) d) Temel Cold water Teo. mco Thi mn Hot air Which is more efficient? Parallel-flow or counter-flow? Why? For a parallel-flow heat exchanger, if the pipe length is infinite long, what is the outlet temperature of the tube? For a parallel-flow heat exchanger, if the pipe length is infinite long, what is the outlet temperature of the shell? For a counter-flow heat exchanger, if the pipe length is infinite long, what is the outlet temperature of the tube? Temel Cold water

Q4) Consider a tube-and-shell heat exchanger consisting of one single shell and one tube, each executing one pass. The hot air of 100°C enters the shell at the rate of 1m³/s. The water of 10°C enters the tube at a mass rate of 0.16kg/s. The density and the heat capacity of the hot air are assumed to constant, Pair = 0.9461 kg/m³ and Cp, air = 1011 J/kg. °C. The density and the heat capacity of the cold water are assumed constant, Pwater = 999.65 kg/m³ and Cp.water = 4190 J/kg. °C. Please note you should show your calculations for all of your answers to the following questions. Parallel-flow Thimni Hot air Counter-flow Tho.mno4 comco Tho, mno Answer the following questions: a) b) c) d) Temel Cold water Teo. mco Thi mn Hot air Which is more efficient? Parallel-flow or counter-flow? Why? For a parallel-flow heat exchanger, if the pipe length is infinite long, what is the outlet temperature of the tube? For a parallel-flow heat exchanger, if the pipe length is infinite long, what is the outlet temperature of the shell? For a counter-flow heat exchanger, if the pipe length is infinite long, what is the outlet temperature of the tube? Temel Cold water

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 7.46P

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