Given that PV=ZnRT for a vessel. For a given Volume, Temp, and initial pressure, and Mole Weight of methane, the LbMoles of methane can be calculated.
Now, add some more methane to the vessel from a high pressure source. Now, the mole wt in the vessel has changed. Assuming no change in temperature, or volume, AND, I know how many lb moles of Methane are added, how do I calculate the new pressure? Z, being the compressibility factor, is a function of temp and pressure. New pressure is unknown and so is the new Z factor. ??? 1 equation, but 2 unknowns. Is there another equation for Z or P that I can use to solve for the 2 unknowns? I greatly appreciate the help.
PS, this is not a student question, but deals with fueling of a CNG vehicle.
Now, add some more methane to the vessel from a high pressure source. Now, the mole wt in the vessel has changed. Assuming no change in temperature, or volume, AND, I know how many lb moles of Methane are added, how do I calculate the new pressure? Z, being the compressibility factor, is a function of temp and pressure. New pressure is unknown and so is the new Z factor. ??? 1 equation, but 2 unknowns. Is there another equation for Z or P that I can use to solve for the 2 unknowns? I greatly appreciate the help.
PS, this is not a student question, but deals with fueling of a CNG vehicle.