1) For a concentric counter-flow heat exchanger, hot oil is coming in the tube of the shell/tube heat exchanger and it's cooled by water that surrounds it in the shell. Calculate what is the required length of the heat exchanger tube in order to perform the necessary cooling. Assume there is negligible heat loss to the surroundings and negligible conductive heat resistance between the two fluids. Mass flow rate of oil = 0.17 kg/s Oil heat capacity = 2375 J/kg-ºC Oil convective heat transfer coefficient = 39.7 W/m²-°C Oil enters tube at temperature = 130 °C Oil leaves tube at temperature = 83 °C Water convective heat transfer coefficient = 2190 W/m²-°C Water enters shell at temperature 15 °C Water leaves shell at temperature = 74 °C Inner diameter = 4.5 cm Outer diameter = 6.5 cm

1) For a concentric counter-flow heat exchanger, hot oil is coming in the tube of the shell/tube heat exchanger and it's cooled by water that surrounds it in the shell. Calculate what is the required length of the heat exchanger tube in order to perform the necessary cooling. Assume there is negligible heat loss to the surroundings and negligible conductive heat resistance between the two fluids. Mass flow rate of oil = 0.17 kg/s Oil heat capacity = 2375 J/kg-ºC Oil convective heat transfer coefficient = 39.7 W/m²-°C Oil enters tube at temperature = 130 °C Oil leaves tube at temperature = 83 °C Water convective heat transfer coefficient = 2190 W/m²-°C Water enters shell at temperature 15 °C Water leaves shell at temperature = 74 °C Inner diameter = 4.5 cm Outer diameter = 6.5 cm

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Heat Exchangers

Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.

Heat Exchanger

The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.

Question

1) For a concentric counter-flow heat exchanger, hot oil is coming in the tube of the
shell/tube heat exchanger and it's cooled by water that surrounds it in the shell.
Calculate what is the required length of the heat exchanger tube in order to perform
the necessary cooling. Assume there is negligible heat loss to the surroundings and
negligible conductive heat resistance between the two fluids.
Mass flow rate of oil = 0.17 kg/s
Oil heat capacity = 2375 J/kg-ºC
Oil convective heat transfer coefficient = 39.7 W/m²-°C
Oil enters tube at temperature = 130 °C
Oil leaves tube at temperature = 83 °C
Water convective heat transfer coefficient = 2190 W/m²-°C
Water enters shell at temperature 15 °C
Water leaves shell at temperature = 74 °C
Inner diameter = 4.5 cm
Outer diameter = 6.5 cm

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