COCO - CAPE-OPEN to CAPE-OPEN simulation environment

Temperature plot

A temperature plot is a plot of any thermodynamic or physical or reaction property that is known to a stream versus temperature.

To create a temperature plot, select Temperature Plot from the Create plot sub menu of the Plot menu. Once a temperature plot is created, you can add more series to the plot by selecting Add Series from the Plot menu if the plot is active, or press Ins.

To create a temperature plot with reaction properties, select Temperature Plot With Reaction Data from the Create plot sub menu of the Plot menu.

Before creating a temperature plot menu, you must create a stream. A series of a temperature plot always refers to a stream. Even if none of the streams conditions are used, the stream still serves as a reference for the thermodynamic models used by the stream type of the stream.

Before you can create a plot with reaction data, at least one reaction package also needs to be present in the simulation.

So you can create plots of properties using different thermodynamic properties by creating two stream types with different models, using each stream type for creation of a stream. Then create a temperature plot using one of the streams, and add a series to the plot using the other stream.

During creation of a plot or a series, you will be prompted for the following input:


The selected stream for plotting serves as the basis for the thermodynamics and as a reference point for all properties that are not varied (pressure, concentration, ...)

Reaction Package

If you have chosen to create a plot with reaction data, you will be asked for the reaction package to calculate the data.


If you have chosen to create a plot with reaction data, you will be asked for the name of the reaction that the property is to be calculated for.


The property to plot. In addition to the thermodynamic and physical properties that are exported by the property package associated with the stream type of the selected stream, you can plot "mass fraction", "mole fraction" and "phase fraction". For a reaction data plot, only reaction properties will be shown.


The identifier of the phase for which to plot the property for. Not all combinations of phases and properties are allowed (e.g. bubble point is only allowed for the Overall phase). Also, not all combinations of phases and properties make sense (some may not be supported by the property package, like surface tension for the vapor phase).

Note that overall properties are at phase equilibrium.

For a reaction plot, this will be the reaction phase as exported by the reaction package for the selected reaction.

Pure or Mixture

The calculation type for the property.

Depending on the above choices, the property may be a scalar, vector or matrix. For a vector and matrix you can choose which compounds you want to plot the selected property for. Selecting a compound for a vector property results a single plot series; selecting a compound for a matrix property results a vector of plot series.

This does not apply to reaction properties.

Composition type

The following composition types can be used:

Pressure type

The following pressure types can be used:


The temperature range for the independent axis.