Hello,
I am working on developing a tool for evaluating "safe relief" conditions for relieving scenario and am seeking information about predicting misting conditions/ coalescing vapor droplets. In this particular case I am concerned with phenolics (Phenol, Bisphenol, Xylenols) and how they will behave during different relieving scenarios. For example a phenol relief during a fire case will be at ~T,P of the boiling point at the relieving pressure which should be well above amb conditions. Then the gas will be superheated at lower pressure (albeit slightly cooled by Joule Thompson effects) at PSV outlet and will then drop in pressure/ cool slightly more as it approaches PSV tailpipe exit. Upon exit the vapor will mix with ambient air and assuming jet velocity conditions prevail under circumstances outlined in API 521, air will be entrained into the relieving stream and rapidly dilute and cool the phenol vapors. I believe due to phenol's relatively high boiling/freezing points there is a likelihood of misting/ solidification that may occur at some point through this process. I am seeking guidance on sources used to predict this behavior, or guidance on how such a system would behave. I would like to be able to predict dispersion for evaluating toxicity/ flammability parameters.
I am open to any recommendations and can further clarify my question and/or provide additional information upon request. I realize this may be verbose, I am working on wrapping my head around the scenario in question myself.