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

Elements Of Electromagnetics
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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
Thi, mni
Hot air
Counter-flow
Tho, mno
Teo meo.
Tho, mn,o
Answer the following questions:
a)
b)
c)
d)
Tel, mel
Cold
water
Tc.o. mc.o
Thi mhi 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?
Телится
Cold
water
Transcribed Image Text: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 Thi, mni Hot air Counter-flow Tho, mno Teo meo. Tho, mn,o Answer the following questions: a) b) c) d) Tel, mel Cold water Tc.o. mc.o Thi mhi 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? Телится Cold water
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