Chemical Engineering - Heat Transfer
Exercise : Heat Transfer - Section 11
11.
In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be
12.
For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is
Nu = 0.023 Re0.8 . Pr0.4
Nu = 
Gz
GzNu = 
Gz
GzNu = 2Gz0.5
13.
Multiple effect evaporation accounts for
14.
In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is
15.
Maximum water velocity in tubes of a 1-2 shell and tube heat exchanger may be around __________ metres/second.
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