Steam leak calculation

[mfqd13]

Hi,

I'm fighting here with steam leak calculations.
I found 3 or 4 different methods and the results are far from consistent.
Is there any standard that guides to the correct formula, or does anyone know the correct formula to calculate it?

Thanks!

 

[davefitz]

I do not have any official calculation procedure, but from past review of choked flow calculations thru condenser sparger pipes, one can say:

The steam leakage would be acoustically choked flow,the discharge coeficient is about 0.82 for cracks whose diameter is laarger than the pipe thickness. But realistically, a crack usually has a clearance or effective diameter much smaller than the pipe thickness, so one should review teh literature on this subject; as I recall, the discharge coeficient for choked flow is strongly related to the ratio of the crack diameter to the wall thickness.

 

[metengr]

http://books.google.com/books?id=C-avw0u-4AcC&pg=PT518&lpg=PT518&

dq=calculation+for+determining+the+rate+of+steam+leakage+in+a+pipe&source=bl&
ots=bTKM53t45u&sig=Vg8XIPcqsCD2ASIj6eSZiX0cH1k&hl=en&
ei=JjANS5CON8rVlQe03PTBBw&sa=X&oi=book_result&ct=result&resnum=5&
ved=0CB0Q6AEwBA#v=onepage&q=&f=false

 

[mfqd13]

Dear metengr,

Thank you very much for your tip!!
Perfect. I will compara it with the methods that i have here, but i think that this one is very straight and very well explained.

Thanks once more!!