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simulation correlations??

simulation correlations??

simulation correlations??

(OP)
i'm trying to run a simulation for a succion of a VRU, so the vapors conditions are, low presure, low flow rate,the line diameters are bigger than 8'', and the lenghts are superior to 5000ft,i'm using Begg & Brill–Moody for presure drop method, and thermodinamic system peng-Robinson.  which are the correct correlations that i must use for this conditions?
I hope you can help me..
 

RE: simulation correlations??

You might get a faster answer if you post this question in the Chemical Engineers / Process forum.

RE: simulation correlations??

Your vapor to liquid ratio, velocity and configuration parameters will set the flow regime, correlate pressure drop with the flow regime you have.  I'd guess you're looking at either gas-mist flow, or if you have a heavier stream, then liquid flowing along the bottom, but you need to check that yourself.  You're the one with the data.

http://virtualpipeline.spaces.msn.com

"What gets us into trouble is not what we don't know, its what we know for sure" - Mark Twain

RE: simulation correlations??

You should be OK with those.  We typically use SRK for this.  BUT - SRK can have iffy behavior if you have a large water fraction so watch out.  Best to run a few simulations and then compare your results with actual field measurements of dP.  If you can't do that, then SRK or PR will give you acceptable results within 25%.  You don't say what simulator you are using, but if you are using Pipephase, make sure you set it up to run multiphase compositional.

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