The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m2.K. The fouling factor after one year of operation is found to be hd0 = 2000W/m2.K. The overall heat transfer co-efficient at this time is
A) 1200 W/m2.K
B) 894 W/m2.K
C) 333 W/m2.K
D) 287 W/m2.K
Correct Answer:
Verified
Q1: Cpµ/K is termed as the _ number.
A)Grashoff
B)Nusselt
C)Prandtl
D)Stanton
Q3: The Graetz number is concerned with the
A)Mass
Q4: At what value of Prandtl number, conduction
Q5: The unit of conductance in SI unit
Q6: Pick out the wrong statement.
A)Bubble size increases
Q7: Pick out the correct statement.
A)Higher is the
Q8: Nucleate boiling is promoted
A)On polished surfaces
B)On rough
Q9: Which of the following has the lowest
Q10: The thermal boundary layer at NPr >
Q11: In case of a multipass shell and
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