Pressure drop in half pipe coils
Pressure drop in half pipe coils
(OP)
I am looking for a method to calculate the pressure drop in half pipe coils like the ones used as heat transfer jackets.
See my posting in Piping and fluid mechanics.
I would link the thread but I can't seem to figure that out.
Thanks
StoneCold
See my posting in Piping and fluid mechanics.
I would link the thread but I can't seem to figure that out.
Thanks
StoneCold





RE: Pressure drop in half pipe coils
One has to estimate the hydraulic diameter and the friction factor.
The hydraulic diameter,
The friction factor, from literature,
valid for 0.34<Re(Dh/Dc)2<300, where Dc is the coil diameter.
The friction drop is estimated from:
where ρ is the liquid density; V, the linear velocity; Re, the Reynolds number; L, the coil length.
RE: Pressure drop in half pipe coils
Best Regards
StoneCold
RE: Pressure drop in half pipe coils
I have always used a pipe with an inside "wetted perimeter" equvalent to that of the half-pipe. Then I have used the calculated half-pipe lengthe and treated this as a piping problem.
There are tables/methods available for piping pressure drop...
How much of a difference in calculated pressure drop will this make ?
-MJC