criconden?
criconden?
(OP)
You get cricondenbar for pressure, cricondentherm for temperature, but what if its a PH diagram - then its a criconden???
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RE: criconden?
The enthalpy of fluid at Cricondenbar and Cricondentherm is determined by the actual temperature at the Cricondenbar pressure, and by the actual pressure at the Cricondentherm temperature. There is infinite number of temperatures at the Cricondenbar pressure, and infinite number of pressures at the Cricondenbar temperature (red lines on the chart below). And there is only one two-phase temperature at the Cricondenbar pressure (called Cricondenbar temperature), and only one two-phase pressure at the Cricondentherm temperature (called Cricondentherm pressure). Enthalpies at these two states are determined by known pressure and temperature.
Does it make sense or have I made it more confusing?
Dejan IVANOVIC
Process Engineer, MSChE
RE: criconden?
See attached graphics
So in this diagram on the dew point line what is the point called (if it has a name) where on the right side only vapour phase can exists?
RE: criconden?
Cricondentherm on P-H diagram can be identified by plotting constant temperature lines and locating the point where the highest temperature line intersects (tangents) the 2-phase line. I believe the point you mentioned is just a dew point at given pressure, and it is below the Cricondentherm temperature - but only by plotting the constant temperature lines we can confirm that.
Dejan IVANOVIC
Process Engineer, MSChE
RE: criconden?
RE: criconden?
I think the point you indicated on your chart is somewhere in the area where I plotted a purple star (or Ninja's shuriken) on the chart below.
Perhaps by identifying the Cricondentherm pressure on P-T diagram (line of P=constant to the Cricondentherm point) and then plotting the same P=constant line on P-H diagram can show you where is Cricondentherm on P-H diagram. All other points on the dew point line are just dew points at various pressures, and I think they don't have any specific title.
Dejan IVANOVIC
Process Engineer, MSChE
RE: criconden?
RE: criconden?
RE: criconden?
if it follows the definition for cricondentherm I would call it cricondentherm in all diagrams (in the same way of other critical points),
however, as for other critical points, PT diagram seems to me more immediate to interpret (visually).
About your problem (verify if there is intermediate condensation for a mixture along some line with a specified value for H) of course you may solve with a series of flash operations, may be you are looking for a more efficient option but in my opinion that could require some intermediate steps for a mixture...
RE: criconden?