Phases and rates in a model

About Phases

You can view Phases before and after a simulation. It contains a formatted list of most model variables, in all phases and all mechanisms with current and historic values and current units.

The Phases window is split into two panes:

Defaulted to the upper pane

Phases

User-defined Variables
Defaulted to the lower pane

Flows

Reactions

Mass transfer

Heat transfer/Cool/Heat and Cool with/Heat with (flow & phase)

Heat exchange (between phases)

Heat duty (on a phase).

Accessing Phases

To open the List all Phases window do one of the following:

go to the Simulator menu and click on View... Phases.
go to the View toolbar and click on the List all Phases icon .

Formatting Phases

To modify your view of List all Phases do one of the following:

If you want to add or remove a reaction or heat/mass transfer from view, right click in the lower pane and then select/deselect item you want added or removed from the dropdown menu.
If you want to add or remove a phase from view, right click in the upper pane and then select the phase and then Show/Hide Phase from the dropdown menu.

Changing the units of mass or concentration for species

To change the units of mass for all species in a phase:

Right click in the Phases window.
Select the phase and then the new mass units you want to see displayed from the dropdown menu.

These units changes propagate throughout the current scenario to every window in which species parameters appear.

Copying the contents of the Phases window

You can copy the contents of the Phases window (e.g. to paste in Excel) by opening it and then using:

From the Simulator menu, Edit>Copy
Click in the Phases window, then Ctrl+C

Changing the number of decimal places on values

The number of decimal places on all calculated variables in the Phases window can be adjusted between a minimum of 1 and a maximum of 6. The default value is 4.

Details of the displayed values by mechanism

Phases

Phases
<phase name>			Organic
<phase kind>			Liquid (set volume)
<comp1>	value	unit	A	value	mol
<comp2>	value	unit	B	value	mmol
<comp3>	value	unit	solvent	value	kg

Temperature	value	unit	Temperature	44	C
Pressure	value	unit	Pressure	2.2	barg
Density	value	unit	Density	895.33	kg/m3
Cp	value	unit	Cp	2545	J/kgK
Volume	value	unit	Volume	25	L
Mass	value	unit	Mass	18.65	kg
Nmoles	value	unit	Nmoles	765	mol
<user variable1>	value	unit	m0	2.3E4	giga_1/m3
<user variable 2>	value	unit	m1	23	m

Calculate statements

Reaction statements

Process Flows

Feed, Transfer to and Remove statements are displayed (i.e. not flows associated with heat transfers). Component flow rates are listed at the top. Below is an example of a ‘Transfer to’ statement:

<flow name>			Sparge
<phase kind>			Gas (set pressure)
<comp1>	value	unit	H2	value	mol/s
<comp2>	value	unit	N2	value	kg/s
<comp3>	value	unit	O2	value	kg/s
Remove from	blank/<phase name>		Remove from	Cylinders
Feed to	blank/<phase name>		Feed to	Solution

<Flowrate> /	value	unit	Qin	12	L/min
Volumetric flow
Mass	value	unit	Mass	18.65	kg/s
Nmoles	value	unit	Nmoles	765	mol/s

Temperature	value	unit	Temperature	44	C
Pressure	value	unit	Pressure	15	barg
Density	value	unit	Density	895.333	kg/m3
Cp	value	unit	Cp	2545	J/kgK
<user variable1>	value	unit	m0	2.3E4	m/s
<user variable 2>	value	unit	m1	23	m

Mass transfer statements

Mass transfer mechanisms are grouped by name (default=dispersed phase name) and the rates of mass transfer listed by component:

<Mass transfer name>			hydrog_dispersion
Mass transfer			Mass transfer
<comp1.rate>	value	unit	H2	0.003	mol/s
<comp2.rate>	value	unit	N2	0.25	mol/s
<comp3.rate>	value	unit	Solvent	1	mol/s

Continuous	<phase1>		Continuous	<bulk liquid>
Dispersed	<phase2>		Dispersed	<organic>

kcac/kcad	value	unit	kLac	0.1	1/s
<comp1.CcStar>	value	unit	H2.CcStar	1E-3	mol/m3
<comp2.CcStar>	value	unit	N2.CcStar	3.2E-3	mol/m3
<comp3.CcStar>	value	unit	Solvent.CcStar	0.6	mol/m3

Heat transfer statements

Heat transfer (flow with a phase)
<HT Name>			Service
Heat transfer	on	<phase name>	Heat transfer	on	organic
<comp1>	value	unit	Glycol	1.2	kg/s
<comp2>	value	unit	Water	1.2	kg/s

Duty	value	unit	Duty	value	unit
UA	value	unit (or sUA)	UA	value	unit

Temperature	value	unit	Temperature	value	unit
Mass	value	unit	Mass	value	unit
Cp	value	unit	Cp	value	unit
Pressure	value	unit	Pressure	value	unit
Density	value	unit	Density	value	unit

Heat Exchange (phases)
<Heat Exchange Name>			Solution_organic
Heat exchange			Heat exchange
Duty	value	Duty	120	W
UA (or sUA)	value	unit	UA	250	W/K
		OR*	sUA	2.2	W/m3K
*User defines UA or sUA in process sheet

Heat Duty
Duty Name>			Steam
Heat duty	on	<phasename>	Heat duty	on	Organic
Duty	value	W	Duty	2.0E4	W
<Duty name>	value	W (or W/m3)	Qpower	20	kW (or Btu/h.ft3)

Flash/Condense statements

Variables
Variables			Variables
User calculations			User calculations
LHS Calc1	value	unit	Yield	82.34	%
LHS Calc2	value	unit	H2_tot	20.23	mmol
LHS Calc3	value	unit	Obj_fn	100.2	$/kg

<phase/flow name>			Solution
Reactions			Reactions
<phase/flow.Qr>	value	unit	Qr	53.2	W
<Reaction name1>			Rxn1
<Rxn1.equation>			equation	A+2B>P
<Rxn1.rate>	value	unit	rate	0.345	mol/s
<Rxn1.heat output>	value	unit	heat output	22.3	W
<Reaction name2>			Rxn2
<Rxn2.equation>			equation	A+P>waste
<Rxn2.rate>	value	unit	rate	0.065	mol/s
<Rxn2.heat output>	value	unit	heat output	-0.02	W

Flash(flow into liquid and vapor streams)
Flash name			Offgas_flash
Flash
Flash
Inlet stream	<flow name>		Inlet stream	Offgas
Liquid outlet	<flow name>		Liquid outlet	Return
Vapor outlet	<flow name>		Vapor outlet	Vap_out
Temperature	value	unit	Temperature	20	C
Pressure	value	unit	Pressure	1	bar
Duty	value	unit	Duty	-0.52	kW