Water flows in a heated round tube at a rate of 3 kg/s. The
heated section of the tube is 4 m long....

Question

Water flows in a heated round tube at a rate of 3 kg/s. The
heated section of the tube is 4 m long. The tube wall is maintained at 90 C. Water
enters the tube at 35 C and leaves the heated section at 45 C. Find the tube
diameter.

Water is flowing in a smooth pipe of diameter D. A
section of this pipe having a length of L is heated. Water at the inlet
to the heated section has a temperature of Tf1.
Water temperature at the exit of the heated section is Tf2.
The heated section of the pipe wall is maintained at Ts. Show
that for turbulent flow in the pipe and a specified heated length and pipe
diameter, pressure drop in the heated section is given by:



[Hint: Use Newton’s law of cooling in conjunction with
Equations IIIb.3.6, IIIb.3.7, and IVb.2.20].

Equations IIIb.3.6



Equations IIIb.3.7



Equations IVb.2.20

Abhijit · Accepted Answer

Heat Transfer Solution
Heat Transfer Solution
Given: Mass flow rate (?) = 3 ?? ?
Length of the pipe (?) = 4?
Inlet temperature of water (?
?
1
) = 35 ? 
Outlet temperature of water (?
?
2
) = 45 ? 
Surface temperature of the pipe (?
?
) = 90 ?
From Energy balance,

Water flows in a heated round tube at a rate of 3 kg/s. The heated section of the tube is 4 m long. The tube wall is maintained at 90 C. Water enters the tube at 35 C and leaves the heated section at...

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