Serrated fins 1

[roaling]

I should appreciate to have information, formulas and procedures on how calculate the heat transfer coefficient of tubes with serrated fins.
Thanks for your help.

 

[IRstuff]

Are you asking for something beyond what's found in most heat transfer books?

TTFN

 

[roaling]

To IRstuff.
Frankly,I know something about plain fins but nothing on serrated. Reference books just to start with the principles and then more detailed info will be very much useful.

 

[magicme]

hello roaling
lots of books treat fins of variable cross section area, and most of them walk through the derivation of one example geometry.
for example Bejan ("Heat Transfer") derives the tapered fin equation....i think the "serated" design you are looking at is his "tapered" design rotated 90 degrees......it might not be hard to take your geometry and walk through his step by step derivation.
actually you might be able to use the basic tapered fin equations (fin of linearly varying cross section) as ithey stand....havent really studied that possiblity.

daveleo

 

[jehar]

Hi Roaling,
Probably the best study of heat transfer coefficients for serrated fins was done by Escoa Fintube Company. They developed a complete method for thermal rating both solid and serrated fins.
You can find their method explained as well as JavaScripts to do the calculations at

http://www.HRSGdesign.com

for Heat Recovery Steam Generators and Waste Heat Boilers or for Direct Fired Heater Convection Sections at

http://www.HeaterDesign.com.

Thanks,
Jack Hardie

 

[greenche]

Since this thread is a little old, I don't know if this will help anyone out, but Jack is right about ESCOA. The company offers a downloadable electronic manual with the equations available at:

http://www.fintubetech.com/escoa/

 

[HOOGER]

HI EVERYBODY,
I AM LOOKING FOR THE DESIGN HEAT RECOVERY STEAM GENERATOR (HORIZONTAL STEAM BOILER) IN .DWG FORMAT. HOOGER