Problem Statement

How many options to model salt water in HYSYS?

Solution

There are different options to model the salt water in HYSYS:

a) OLI or Aspen Properties: The OLI is a rigorous electrolyte package developed by OLI Systems (http://www.olisystems.com/) that can be used to rigorously model oil-water-salt systems. HYSYS features an interface to the OLI property package, but you have to purchase the "engine" from OLI Systems. Also, starting in V7.0, you can use an Aspen Properties package to model rigorously an electrolyte system. Select the Aspen properties option in the Fluid Package window when you select the property methods.

b) Hypothetical components: Another approach is to create a hypothetical component for sea water and another for produced water. Go to the Simulation Basis Manager > Hypotheticals tab and click on "Clone comps". You can choose the library H2O component as a starting point and then modify the
properties to suit your needs.

c) Tabular properties: this is another approach, where you can actually modify the properties of a library component. You can access this feature on the 'Tabular' tab in the fluid package. This allows you to specify tabular data points for certain properties (such as density and heat capacity) to which HYSYS does a curve fit and the fitted data is then used in the model. One thing to note with this approach is that the entire fluid package would use Tabular Properties if enabled, so it might be best to make a separate fluid package just for the sea water streams.

More information on options b and c can be found in the Simulation Basis User Guide attached.

Keywords

Aspen HYSYS, Sea Water, Model