Software Thermodynamics

[EmmanuelTop]

Good morning/afternoon to everyone in the forum,


I need assistance in finding references or articles that may be of some help in modeling reservoir systems, containing high percentage of CO2 - from 3% up to 30%. I am concerned about fluid packages that are to be used within the model.

I have some doubts that PR or PRSV equations of state can be used in such wide range of acid components concentration, especially having in mind that fluid consists of both hydrocarbon (liquid and vapor) and water/steam phases; so as CO2 concentration increases, non-ideality and interraction between highly polar components (CO2 and water/steam) must be taken into account.

I have to consider what fluid package should be used for modeling, in order to calculate (predict) as much as possible accurate phase distribution(s), component concentrations, physical properties etc. One of the main subjects is to estimate heat and material balance required for centrifugal compressor design, which is the next step in this project.

Thanks in advance,

http://antwrp.gsfc.nasa.gov/apod/astropix.html

 

[dcasto]

Modified Peng Robinson for over 10% CO2. Virtual Materials Group has a good data base.

 

[EmmanuelTop]

dcasto,

what is the % basis for CO2 in Hysys, for using Peng-Robinson package? Mole, weight, or volume?

http://antwrp.gsfc.nasa.gov/apod/astropix.html

 

[dcasto]

I don't have the HySYS program.

 

[EmmanuelTop]

So what was the reference for your answer?

http://antwrp.gsfc.nasa.gov/apod/astropix.html

 

[dcasto]

Peng Robinson is a generic EOS and in the literature in WinSim and from articles in the past I know the modified PR should be used when CO2 goes over 10%.

I've seen some flashes with VMG that compare well with other simulator packages.