Which of the following parameters is increased by use of finned tube in a multipass shell and tube heat exchanger?

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

In a multipass shell and tube heat exchanger, the problem of differential expansion between the shell and tube passes is taken care of by using a

A

U-bend

B

Floating head tube sheet

C

Either A or B

D

Neither A nor B

In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side __________ the heat transfer rate.

A

Increases

B

Decreases

C

Does not affect

D

May increase or decrease, depends on the type of baffle

In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon

A

Baffle spacing

B

Clearance

C

Pitch

D

None of these

In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

A

Reducing scale deposition

B

Increasing pressure drop

C

Fixing the tubes

D

Creating turbulence

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

In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to __________ the velocity head.

A

Twice

B

Four times

C

Square root of

D

Square of

The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is

A

2

B

$$\frac{1}{2}$$

C

4

D

$$\frac{1}{4}$$

In case of a multipass shell and tube heat exchanger, the temperature drop in the fluid

A

Is inversely proportional to the resistance across which the drop occurs

B

And the wall are proportional to individual resistances

C

And the wall is not related

D

None of these

Which of the following parameters is increased by use of finned tube in a multipass shell and tube heat exchanger?

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