Natural Gas Condensation Rate in Condenser
Natural Gas Condensation Rate in Condenser
(OP)
In a gas compressor plant, a gas mixture (containing 16 different gases) goes out of a compressor discharge into a cooler/condenser. Pressure and temperature at condenser inlet and outlet is known. In the cooler outlet, there will be both condensed gas and the remaining uncondensed gas.
How can one calculate the mass flow rate of condensed gas (or uncondensed gas. any will do) that goes out of the cooler?
I am an mechanical engineering student on an internship, I cannot find anything in my courses that can help me, unfortunately.
Thank you!
How can one calculate the mass flow rate of condensed gas (or uncondensed gas. any will do) that goes out of the cooler?
I am an mechanical engineering student on an internship, I cannot find anything in my courses that can help me, unfortunately.
Thank you!
RE: Natural Gas Condensation Rate in Condenser
RE: Natural Gas Condensation Rate in Condenser
As Morten A says, this is a complex scenario and only either by experiment and testing / sampling or use of an analytical tool such as Hysys (other software is available) will you get close to the answer.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Natural Gas Condensation Rate in Condenser
as said in previous posts there are many commercial and free simulators, but you can solve also with some free online tool or Excel pages (see for example htcprops.xls distributed with Prode), many alternatives available...
RE: Natural Gas Condensation Rate in Condenser
Thanks a lot! I'll look into isothermal flashing and Prode. If it's too complicated I'll use HYSYS.
RE: Natural Gas Condensation Rate in Condenser
RE: Natural Gas Condensation Rate in Condenser
You said that you wanted to know the liquid mass and the gas mass of the cooler outlet.
If you don't use HYSYS or similar software, you can calculate manually.
You know the components, percent of the gas. So you can calculate the partial pressure of each component according to Dalton's law of partial pressure.
You can find the saturated vapor pressure of the component in the cooler outlet temperature from link such as https://webbook.nist.gov/chemistry/
So if the component's partial pressure is higher than the saturated vapor pressure, the gas will condense to liquid until the partial pressure equal to the saturated vapor pressure. You can calculate the mass of the liquid or gas now.
You can do these one by one.
RE: Natural Gas Condensation Rate in Condenser
at compressor discharge (before to enter the cooler / condenser) most probably you have only a vapor phase, while after the cooler / condenser there could be (or not) condensate,
if you wish to receive more information, perhaps you can provide additional details as the composition and the operating conditions...
RE: Natural Gas Condensation Rate in Condenser
RE: Natural Gas Condensation Rate in Condenser
for these (simple) problems you can adopt many different tools (see previous posts) and procedures as data validation and reconciliation to compare measured values vs. simulated values...