Reference:  Flow of Fluids – Technical Paper No 410M, 1999, Crane Co. Page 4-6, Example 4-11.


Pipe Flow Expert File: Case_35_Water_Flat_Heating_Coil.pfe


Problem Description: 

A heating coil manufactured from 1” diameter steel pipe (schedule 40) is supplied with 60 l/min of water at 80°C. 

The bends of the heating coil have a 100 mm radius.


Find the pressure loss across the heating coil.


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Fluid Data: Water at 80°C


Result Comparison: 


Data Item

Published data

Pipe Flow Expert

Pressure Loss (bar)

0.152

0.1559 (1.000 – 0.8441)

Reynolds Number

133000

131085

Friction factor

0.024

0.02396

Fluid Viscosity (Centipoise) 

0.350

0.354


Commentary: 

The published data and the calculated results compare well.

The system was modeled in Pipe Flow Expert with a fluid surface pressure of 1.00 bar g at the inlet to the system. 

The outlet node had a resulting pressure of 0.8441 bar g.

The pressure difference is obtained by subtracting the outlet pressure from the inlet pressure.

The 100 mm radius bends in the pipe were modeled in Pipe Flow Expert using two long pipe bend fittings.