Blowdown calculations using HYSYS
Blowdown calculations using HYSYS
(OP)
Dear all,
Could you please help me with the following query:
Now I am doing the blowdown calculations for the gas injection manifold. It is 16" Manifold with 10 meters line with enlarger at the end (increasing line size to 6") and blowdown orifice on the 6" line. Is it possible to use the depressuring utility in HYSYS to calculate the blowdown time and final temperature, taking into account that flow upstream of orifice can be already choked?
Thanks in advance.
Could you please help me with the following query:
Now I am doing the blowdown calculations for the gas injection manifold. It is 16" Manifold with 10 meters line with enlarger at the end (increasing line size to 6") and blowdown orifice on the 6" line. Is it possible to use the depressuring utility in HYSYS to calculate the blowdown time and final temperature, taking into account that flow upstream of orifice can be already choked?
Thanks in advance.





RE: Blowdown calculations using HYSYS
RE: Blowdown calculations using HYSYS
Best regards
Morten
RE: Blowdown calculations using HYSYS
RE: Blowdown calculations using HYSYS
My answer is: No, not for SS HYSYS anyway.
For dynamic hysys i would be inclined to say yes (but im not sure)
Best regards
Morten
RE: Blowdown calculations using HYSYS
The size of the line upstream of the orifice is not given, but it is reasonable to assume that it will be larger than the orifice bore, and choke flow will occur only at the orifice. If choked flow is occuring at the end of the line to the orifice then this would be the controlling point and can be put into the depressurisation utility.
As I said, I have not used the depressurisation utility for a while and cannot remember the details, but I would still recommend having a look at the Hysys tutorial.
RE: Blowdown calculations using HYSYS
RE: Blowdown calculations using HYSYS
Regards,
SNORGY.