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Chemical Heat Transfer

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

Chemical Heat Transfer /
Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

A. U1 = U2
B. U2 > U1
C. U1 > U2
D. U1 = dirt factor – U2

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________? Read More »

Chemical Heat Transfer

In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used________________?

Chemical Heat Transfer /
In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used________________?

A. In low range of temperature differences
B. In high range of temperature differences
C. Because of its low cost
D. To prevent corrosion of the tube bundles

In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used________________? Read More »

Chemical Heat Transfer

For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it________________?

Chemical Heat Transfer /
For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it________________?

A. Occupies smaller space
B. Is more economical
C. Is easy to operate and maintain
D. All A., B. and C.

For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it________________? Read More »

Chemical Heat Transfer

In a gas-liquid shell and tube heat exchanger, the_________________?

Chemical Heat Transfer /
In a gas-liquid shell and tube heat exchanger, the_________________?

A. Presence of a non-condensable gas decreases the condensing film co-efficient
B. Gases under high pressure are routed through the tube side, because high pressure gases are
corrosive in nature
C. Gases to be heated/cooled is normally routed through the shell side, because the corrosion
caused by the cooling water or steam condensate remain localised to the tubes
D. All A, B. & C.

In a gas-liquid shell and tube heat exchanger, the_________________? Read More »

Chemical Heat Transfer