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/m2 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
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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