The overall heat transfer coefficient of a counter current heat exchanger based on clean
W
surface is 800
After 5 years, a scale is formed on the surface so that the heat
1
transfer rate is reduced to 75% of its original value based on clean surface. Assume that
the change ih heat transfer area due to scale formation is negligible. Calculate the fouling
factor
W
a) 3.75x10-
Ioc
W
b) 5.00x10-
m
W
c) 4.166 x 10-4
W
d) 1.66x10-
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Answer:
from the above question answer is option a
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