Steam Condition after PSV of Boiler
Steam Condition after PSV of Boiler
(OP)
Considering a Boiler that produces dry saturated steam at 16barg.
I would like to known temperature of steam at psv of boiler outlet pipe.
Would be reasonable to consider adiabatic expansion and PSV would superheat the steam, and temperature would be around 150Celcius at ATM as shown on attached image?





RE: Steam Condition after PSV of Boiler
RE: Steam Condition after PSV of Boiler
This is your second post. Both feel homework-ish to me. We don't do homework here. You can get help with homework here http://www.engineering.com/AskForum/aff/28.aspx
Good luck,
Latexman
Technically, the glass is always full - 1/2 air and 1/2 water.
RE: Steam Condition after PSV of Boiler
Dejan IVANOVIC
Process Engineer, MSChE
RE: Steam Condition after PSV of Boiler
Will refrain posting then, until I have a more "professional" question.
Or post on the link suggested then.
RE: Steam Condition after PSV of Boiler
RE: Steam Condition after PSV of Boiler
RE: Steam Condition after PSV of Boiler
Assuming adiabatic expansion and 100% quality will give you the highest temperature and velocity, and is therefore probably a safe assumption even if it is not entirely correct.
Katmar Software - AioFlo Pipe Hydraulics
http://katmarsoftware.com
"An undefined problem has an infinite number of solutions"
RE: Steam Condition after PSV of Boiler
My comment is because I recognized that given that I am fresh out of college, this forum might be a sea for bigger fish than myself. Was out of humility, no sarcasm or rudeness intended.
The insight regarding quality of steam is interesting also and I appreciate.
I would believe that is safe to assume also that each Pressure reducing valve on the supply header would increase quality of steam immediately after, which is something I haven't thought before.
RE: Steam Condition after PSV of Boiler
Just a final note. In your OP you have represented the process through the valve as an isenthalpic one on the P-H chart. Neglecting the heat loss due to friction (this confers irreversibility to the process) you can assume the starting and final enthalpies are the same, but it's not true to say that the enthalpy does remain constant during the overall process.