Heat water by condensing steam in the shell. The flow rate of the water is 15 kg/s
Question:
Heat water by condensing steam in the shell. The flow rate of the water is 15 kg/s and it is heated from 60 to 80°C. The steam condenses at 140°C and the overall heat transfer coefficient of the heat exchanger is 820 W/(m2 K). If there are 45 tubes with an OD of 2.75 cm, calculate the length of tubes required.
GIVEN
- Shell-and-tube heat exchanger with two tube passes and one shell pass
- Water in tubes, condensing steam in shell
- Water flow rate (mw ) = 15 kg/s
- Water temperatures
- Tw,in = 60°C
- Tw,out = 80°C
- Steam temperature (Ts) = 140°C
- Overall heat transfer coefficient (U) = 820 W/(m2 K)
- Number of tubes (N) = 45
- Tube outside diameter (D) = 2.75 cm = 0.0275 m
ASSUMPTIONS
- Counterflow
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Related Book For
Principles of heat transfer
ISBN: 978-0495667704
7th Edition
Authors: Frank Kreith, Raj M. Manglik, Mark S. Bohn
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