Water Saturation at low temperatures & high temperatures
Water Saturation at low temperatures & high temperatures
(OP)
At 450 PSIG and -60 F what is the saturation concentration/ partial pressure of water? We trying to reduce the water content of a stream to prevent hydrate formation. It our understanding that water needs to be present to create hydrates. The HYSYS model runs out of significant figures for lowering water content and doesn't register at PPB. The goal is to not drop liquid in the pipeline, with the design conditions of 450 PSIG and -60 stated above. Is there any literature or insight out there?





RE: Water Saturation at low temperatures & high temperatures
Is this what you were looking for ?
RE: Water Saturation at low temperatures & high temperatures
Best regards
Morten
RE: Water Saturation at low temperatures & high temperatures
Morten, good point, we should consider providing guidance for operating when the mol sieve drying unit is down in the winter time. We already have addressed winter and summer operating modes, the summer not needing as dry of a stream.
RE: Water Saturation at low temperatures & high temperatures
A word of caution here using Hysys and the hydrate prediction model. Your dewpoint temperature of -60°F is not in the range of the model as the temperature is far below the freezing point. On a previous project with high 22% H2S content at 1,000 Psig and 95°F the hydrate model found two water dewpoints in the range of +14°F and -4°F. To my knowlegde, Hyprotech never solved this problem, when I reported it.
In summary, be aware of the Hysys produced by Hysys.
Krossview/OK
RE: Water Saturation at low temperatures & high temperatures
In summary, be aware of the results produced by Hysys.
Krossview/OK