DIERS applicability for two phase flow
DIERS applicability for two phase flow
(OP)
I am into process engineering and part of my job involves specifying
thermophysical data and flows for various safety valves.Currently I am working on a process which contains C1-C4 hydrocarbons.I have this process fluid which is vapor at normal condition but when I flash it adiabatically to a higher pressure i.e. at its relieving pressure under a blocked outlet condition I get a two phase fluid.Now when I am reporting data for the the relief valve should I take into account DIERS criteria or simply report data for two phase flow
thermophysical data and flows for various safety valves.Currently I am working on a process which contains C1-C4 hydrocarbons.I have this process fluid which is vapor at normal condition but when I flash it adiabatically to a higher pressure i.e. at its relieving pressure under a blocked outlet condition I get a two phase fluid.Now when I am reporting data for the the relief valve should I take into account DIERS criteria or simply report data for two phase flow





RE: DIERS applicability for two phase flow
I'm guessing that you're trying to describe a supercritical fluid in the protected vessel, which transitions to a 2-phase stream on the outlet side of the PSV. But, that's not what you wrote, so I'm not sure I'm interpreting it correctly.
RE: DIERS applicability for two phase flow
RE: DIERS applicability for two phase flow
RE: DIERS applicability for two phase flow
RE: DIERS applicability for two phase flow
RE: DIERS applicability for two phase flow
RE: DIERS applicability for two phase flow
RE: DIERS applicability for two phase flow
The PSV doesn't care how/why it has to handle two phase flow.
RE: DIERS applicability for two phase flow
RE: DIERS applicability for two phase flow
So, be cautious about says you know the phase fraction, and regardless of that split, the DIERS method is the best available technology for safely sizing the relief device.