temerature drop due to pressure drop
temerature drop due to pressure drop
(OP)
how much temperature drop for a pressure drop
i have to answers
1- 12 celisus for 6.78 bar
2- 1 celisus for 3 bar
i have to answers
1- 12 celisus for 6.78 bar
2- 1 celisus for 3 bar





RE: temerature drop due to pressure drop
Depends upon what kind of process your are dealing with.
Thanks,
Gordan
http://engware.i-dentity.com
RE: temerature drop due to pressure drop
RE: temerature drop due to pressure drop
This is for pressures near 50 barg and 20 C.
RE: temerature drop due to pressure drop
Unless the gas undergoes a sudden pressure drop by passing through a valve, an orifice plate or a similar device, I don't think that there will be any J-T effect at all. Any temperature drop due to the pressure drop would simply be due to heat transfer ... and that would depend on the pipeline length, the type and amount of insulation, the pipe material, and the outside temperature.
Milton Beychok
(Visit me at www.air-dispersion.com)
.
RE: temerature drop due to pressure drop
Concerning the J-T coefficient.
Assuming no heat transfer from or to the surroundings, and assuming a J-T effect takes place due to the expansion in the line, from Perry VI (table 3-150) there is an inversion of the J-T coefficient at about 60 Mpa (reduced pressure≥12).
Meaning that the gas could heat up on expansion at all temperatures at pressures this high.
At TR≈1.5, the inversion would take place at reduced pressures higher than 10.
RE: temerature drop due to pressure drop
25362, yep, thats why I stated near 50 barg and 20C.
RE: temerature drop due to pressure drop
Please read thread69-37069: JT Effect in Gas Pipelines (in the Petroleum production engineering forum) to see just how much disagreement there is as to whether or not J-T effect depends on having a flow obstruction device (valve, orifice etc) in the pipeline.
Milton Beychok
(Visit me at www.air-dispersion.com)
.
RE: temerature drop due to pressure drop
RE: temerature drop due to pressure drop