Design a heat exchanger that condenses 10,000 kg/hr of steam at 0.3372 bar. The cold stream of water enters at 297K and exits at 311K. The heat exchanger uses tubing with 18.9 mm ID and 22.2 mm OD with thermal conductivity, k=16 W/mK. If the geometry is a shell and tube with a single shell, determine the number of tubes and passes. Limit the length of a single pass to 3.67 m. (1) Find the heat transfer from the hot stream to the cold stream.

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ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter9: Heat Transfer With Phase Change
Section: Chapter Questions
Problem 9.32P
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Design a heat exchanger that condenses 10,000 kg/hr of steam at 0.3372 bar. The cold stream of water
enters at 297K and exits at 311K. The heat exchanger uses tubing with 18.9 mm ID and 22.2 mm OD
with thermal conductivity, k=16 W/mK. If the geometry is a shell and tube with a single shell, determine
the number of tubes and passes. Limit the length of a single pass to 3.67 m.
(1) Find the heat transfer from the hot stream to the cold stream.
(2) Plot the length of the tubes versus the number of tubes for 3 punebers of per
(3) Plot the pressure drop versus the number of tubes.
(4) Pick a design that you think best accommodates compact size and low pressure drop.
Notes:
(1) You will need to calculate the heat transfer coefficient due to condensation using a boiling
formulation.
(2) You will need to guess a temperature for the outer surface of the tube to complete the solution
and then recheck this temperature to see if it is correct.
Transcribed Image Text:Design a heat exchanger that condenses 10,000 kg/hr of steam at 0.3372 bar. The cold stream of water enters at 297K and exits at 311K. The heat exchanger uses tubing with 18.9 mm ID and 22.2 mm OD with thermal conductivity, k=16 W/mK. If the geometry is a shell and tube with a single shell, determine the number of tubes and passes. Limit the length of a single pass to 3.67 m. (1) Find the heat transfer from the hot stream to the cold stream. (2) Plot the length of the tubes versus the number of tubes for 3 punebers of per (3) Plot the pressure drop versus the number of tubes. (4) Pick a design that you think best accommodates compact size and low pressure drop. Notes: (1) You will need to calculate the heat transfer coefficient due to condensation using a boiling formulation. (2) You will need to guess a temperature for the outer surface of the tube to complete the solution and then recheck this temperature to see if it is correct.
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