Related Questions

Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
A Finned tube heat exchanger with air inside and steam outside
B Finned tube heat exchanger with air outside and steam inside
C Shell and tube heat exchanger with air inside tubes and steam on shell side
D Shell and tube heat exchanger with air on shell side and steam inside tubes
For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it
A Decreases the pressure drop
B Decreases the outlet temperature of cooling medium
C Increases the overall heat transfer coefficient
D None of these
If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will
A Increase by 1.8 times
B Decrease by 22
C Increase by 216
D Remain unchanged
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.
A Increase by 1.8
B Decrease by 22
C Increase by 21.6
D None of these
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$
In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is
A Infinity
B Zero
C Same as average heat transfer co-efficient for tube side
D None of these
A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires
A Less heating surface
B More space
C Lower maintenance cost
D None of these
In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger.
A Once
B Twice
C Thrice
D Four times
Shell side pressure drop in a shell and tube heat exchanger does not depend upon the
A Baffle spacing & shell diameter
B Tube diameter & pitch
C Viscosity, density & mass velocity of shell side fluid
D None of these
The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle.
A Disk and ring
B Segmental
C Orifice
D Independent of the type of

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