- #1
Mike1977
- 4
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Hi from Germany,
I would like to calculate the JTC for a concrete example.
From a pressure vessel full (in german we say "Druckbehälter" (db)) with dry air (Vdb=100 m3; pdb=300 bar; Tdb=293,13 K) flows out the air after the valve outside (pamb=1 bar). I suppose that Tdb and pb in the pressure vessel remain constant.
With the following approach I would like to calculate the cooling of the air. The constants a, b and R are known to me.:
What values I have to use for T and cp?
I think, I have to use the values from the pressure vessel, to calculate the temperature of the air after throttling to atmospheric pressure. Therfore I have to calculate the molar isobaric heat capacity of air cp,db in the pressure vessel (at Tdb = 293.13 K and pdb = 300 bar).
Am I right ??
Thanks for your help, Mike
I would like to calculate the JTC for a concrete example.
From a pressure vessel full (in german we say "Druckbehälter" (db)) with dry air (Vdb=100 m3; pdb=300 bar; Tdb=293,13 K) flows out the air after the valve outside (pamb=1 bar). I suppose that Tdb and pb in the pressure vessel remain constant.
With the following approach I would like to calculate the cooling of the air. The constants a, b and R are known to me.:
What values I have to use for T and cp?
I think, I have to use the values from the pressure vessel, to calculate the temperature of the air after throttling to atmospheric pressure. Therfore I have to calculate the molar isobaric heat capacity of air cp,db in the pressure vessel (at Tdb = 293.13 K and pdb = 300 bar).
Am I right ??
Thanks for your help, Mike