>I have a question about HEM and HNE models for PSV sizing/rating,
>do these models work for non-critical flows ?
>(I mean a flow where the maximum speed is below critical flow)
>It may seem a stupid question but I have to size some PSV with
>Pset = 5 Bar.a and Pdischarge (flare network, dynamic) = 2 Bar.a
when PSV outlet pressure > Pin / 2
flow can become subcritical, the method ISPF() in Prode Properties gives reasonable results also in this are within certain limits,
you may find a discussion in this blog entry
'http://www.egpet.net/vb/entries/82303-PSV-sizing-with-HEM-%28Homogeneous-Equilibrium-Model%29-limits-of-application'
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