(a)
Interpretation:
The maximum flow rate through a fire hose for a pump is to be determined.
Concept Introduction:
The flow rate through the fire hose is given as,
The notations used here are,
D = Diameter of the fire hose
The average velocity can be calculated from the pressure drop of the fluid,
The notations used here are,
g = Acceleration due to gravity
f = Fanning friction factor
L = Length of the duct
The Reynolds number is given as,
The notations used here are,
D = Diameter of duct
The roughness parameter is given as,
(b)
Interpretation:
The increase in flow is to be determined due to contamination by ethylene oxide.
Concept Introduction:
The change in friction factor determines the change in flow rate as it depends on the average velocity keeping other factors constant.
Thus,
The flow rate through the fire hose is given as,
The notations used here are,
D = Diameter of the fire hose
The average velocity can be calculated from the pressure drop of the fluid,
The notations used here are,
g = Acceleration due to gravity
f = Fanning friction factor
L = Length of the duct
Combining equation (1) and (2), it can be deduced that,
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Unit Operations of Chemical Engineering
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