Best dP correlation for two-phase steam?
Best dP correlation for two-phase steam?
(OP)
What correlation have you guys used with good success to calculate dP for two-phase steam? I am using Beggs-Brill-Moody but it's not a very good match with the field data - the error is about 20%, which is too high. This is a 70% quality, 550 psig system. I also tried Dukler and LM but they were worse.
Any thoughts/ideas/miscellaneous ramblings welcomed...
Any thoughts/ideas/miscellaneous ramblings welcomed...
Thanks!
Pete
pjchandl@prou.com





RE: Best dP correlation for two-phase steam?
Have you tried Bernoulli's equation (using 1.57 lbm/ft3 density at that quality)? -Chas
RE: Best dP correlation for two-phase steam?
Try this link: http://www.olga2000.com/
Best Regards
Morten
RE: Best dP correlation for two-phase steam?
RE: Best dP correlation for two-phase steam?
RE: Best dP correlation for two-phase steam?
Thanks!
Pete
pjchandl@prou.com
RE: Best dP correlation for two-phase steam?
I should have mentioned that I am using the PipePhase software to do these calculations - I am not doing them by hand.
So far the best match is with the Dukler equation, with BBM in 2nd place. The problem is - the correlations are overpredicting the dP by a huge margin, like 200%, relative to the field data, on the longest runs of pipe (several thousand feet). I guess I will have to manually adjust the pipe to make the correlation match the field data. The problem with that is - it fouls up the heat transfer calcs, which fouls up the accuracy of the steam quality predictions... oh well...
Thanks!
Pete
pjchandl@prou.com