Surface Area of a helical coil?
Surface Area of a helical coil?
(OP)
I need the formula for calcuating the surface area of a helical coil. I have the pipe diameter, coil height, # of turns, and pitch, but can not seem to remember the formula used. Any help would be appreciated.
Thanks.
Thanks.





RE: Surface Area of a helical coil?
Maui
RE: Surface Area of a helical coil?
RE: Surface Area of a helical coil?
N*PI*D*sqrt( 1+ (P/(PI*D))^2 )
where:
P=pitch
N=# turns
D=diameter of helix (the helix in the center of the pipe)
Multiply the helix length by PI*d
d=pipe diameter (either ID or OD, whichever you're looking for)
SA=N*PI^2*D*d*sqrt(1+(P/PI*D))^2)
Pesy
RE: Surface Area of a helical coil?
Total coil length,
where N is number of turns, pi =3.1416, r is the coil radius, and p is the pitch.
The external surface:
Where do is the coil's pipe external diameter.
RE: Surface Area of a helical coil?
Any error in this assumption would be no greater than the errors in your physical property data and the heat transfer correlations.
Where ever possible - KISS!
regards
Harvey (Katmar)