mcketta wehe chart 1

[gazepdapi]

This may be a stupid questions but the temperature on this chart is the dew point temperature correct and not the temperature of the actual gas?

Thanks!

 

[PaoloPemi]

I refer to the McKetta-Vehe chart published in 1958 and available in my GPSA, it shows the water content of a sweet gas at different conditions of pressure and temperature, there are corrections to apply for different gas gravity and water salinity,
the chart shows the (maximum) water content (i.e. saturated gas) at specified operating conditions, out of curiosity I compared some results against the Gerg 2004 model available in Prode Properties, they are quite close.

 

[gazepdapi]

I see but that's not what I asked. I'm not asking if the mcketta wehe chart is accurate, I'm asking is the temperature on the x axis the actual temperature of the gas or the dew point temperature of that same gas?

 

[PaoloPemi]

from my post :
"the chart shows the (maximum) water content (i.e. saturated gas) at specified operating conditions"
I believe it is clear, however if your stream has a operating temperature of 40F start from 40F on x axis, notice that with this temperature you have hydrate formation somewhere in the 200-300 psia range, given a operating pressure you can read on y axis the (maximum) water content (see my previous post for details)