A condenser unit is of a shell and tube configuration with steam condensing at 85C in the shell The coefficient on the condensate side is 10,600 W m 2 K Water at 20C enters the tubes, which make two passes through the single shell unit The water leaves the unit at a temperature of 38C An overall he...

Neglect tube resistance Using Dittus Boelter equat ...

A condenser unit is of a shell-and-tube configuration with steam condensing at 85C in the shell. The

Question:

A condenser unit is of a shell-and-tube configuration with steam condensing at 85°C in the shell. The coefficient on the condensate side is 10,600 W/m² · K. Water at 20°C enters the tubes, which make two passes through the single-shell unit. The water leaves the unit at a temperature of 38°C. An overall heat transfer coefficient of 4600 W/m² · K may be assumed to apply. The heat-transfer rate is 0.2 × 10⁶ kW. What must be the required length of tubes for this case?

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