Temperature of Steam After it goes through a PRV
Temperature of Steam After it goes through a PRV
(OP)
I am trying to determine the temperature of the steam after it goes through a pressure reducing valve (prv).
The upstream pressure is 600 psig @ saturation temperature. The down stream pressure is 400 psig.
From my understanding going through a prv the enthalpy of the system should stay the same.
Therefore, I usually look up the enthalpy at the higher pressure then look up the properties of the steam with the lower pressure and same enthalpy. Thus I get the down stream temperature. For the case above the enthaply at saturation temperature are listed below.
Enthalpy of saturated 600 psig steam is 1203.50 btu/lb
Enthalpy of saturated 400 psig steam is 1205.16 btu/lb
Therefor my method does not work to get the temperature or any properties of the lower pressure steam. Is there a more accurate way to calculate the down pressure steam?
The upstream pressure is 600 psig @ saturation temperature. The down stream pressure is 400 psig.
From my understanding going through a prv the enthalpy of the system should stay the same.
Therefore, I usually look up the enthalpy at the higher pressure then look up the properties of the steam with the lower pressure and same enthalpy. Thus I get the down stream temperature. For the case above the enthaply at saturation temperature are listed below.
Enthalpy of saturated 600 psig steam is 1203.50 btu/lb
Enthalpy of saturated 400 psig steam is 1205.16 btu/lb
Therefor my method does not work to get the temperature or any properties of the lower pressure steam. Is there a more accurate way to calculate the down pressure steam?





RE: Temperature of Steam After it goes through a PRV
http://www.spiraxsarco.com/esc/SS_Properties.aspx?...
Best to you,
Goober Dave
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RE: Temperature of Steam After it goes through a PRV
RE: Temperature of Steam After it goes through a PRV
Thanks for the link, but that is what I use to get my properties. The problem is if I put in 400 psig with 1203.5 BTU i get an error.
RE: Temperature of Steam After it goes through a PRV
Thanks, so if i understand correctly the 400 psig steam will just be at saturation temperature?
OJ
RE: Temperature of Steam After it goes through a PRV
RE: Temperature of Steam After it goes through a PRV
RE: Temperature of Steam After it goes through a PRV
RE: Temperature of Steam After it goes through a PRV
Good luck,
Latexman
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RE: Temperature of Steam After it goes through a PRV
http://www.spiraxsarco.com/resources/steam-enginee...
Scroll down to "The effects of reducing steam pressure"
RE: Temperature of Steam After it goes through a PRV
RE: Temperature of Steam After it goes through a PRV
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