Plant Model - Settings

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Introduction

This tab page on the Plant Model Access Window has a number of parameters that the user may either set or read for Global settings.

Tag (Long/Short)	Input / Calc	Description/Calculated Variables / Options
List of Species to report nett flows (shown on Links page): List
This allows the user to add species for a quick species balance around a unit operation. The results of this will be displayed on a per unit operation basis, on the Links Tab of the access window. This information can be used to create, for example, a water / steam balance.
SpeciesXX / SpXX	List	X is the number of the selected species. Select the required species from the list. The selected species will be added to the species balance, shown on the Links Table. The default species are H2O(l) and H2O(g). The last row is always blank to allow the user to add more species. To remove a species, choose the “-” option instead of the selected species. As species are added or removed, they are sorted as per the order in the configuration file. NOTE: If different species in the list have the same Component, then the net flow of the component is also added to the links table to display the overall Nett flow of the species. This is to help identify the use of the species in reactions. For example, H2O(l) and H2O(g) are added to the list, when viewing the data on the Links tab of any unit model, we will find component H2O is also added to the list. This additional field is useful for showing the nett flow of water, thus helping user identify if H2O is "consumed" or "created" via reactions.
Closure (only available in Build 138 or earlier)
Action This setting determines when the closure tests are performed. A closure test is a check for mass and energy balance around a unit model. If this fails then a Condition message is shown.	Off	Closure calculation is off. This selection is not recommended.
	WhenNotBusy	Closure calculations will only be carried out when the solver is not busy, i.e. when the model is paused or stopped.
	Continuous	Closure calculations are carried out at every iteration/step.
	OnCount	The user defines at which iterations/steps Closure calculations will be performed, see Count below.
	WhenSolved	Only available in a steady state project. Closure calculations will only be carried out when the project is solved.
Report This is used to determine where closure messages will appear in the messages window.	Messages	Closure messages will be sent to the Messages tab of the Messages window.
	Conditions	Closure messages will be sent to the Solver Conditions tab of the Messages window.
	Both	Closure messages will be sent to the both the Messages and Solver Conditions tabs of the Messages window.
	Both - Idle	Closure messages will be sent to the both the Messages and Solver Conditions tabs of the Messages window AND SysCAD will go to Idle mode.
Count	Input	This field is only visible if the user has selected OnCount for Action. This defines the when the Closure calculations are performed. e.g. if the user chooses 10, then in a steady state project the Closure calculations will be performed at every 10th iteration, or in a dynamic project, at every 10th step.
Heat.Options	Off	Do not perform any closure heat (energy) calculations. This selection is not recommended.
	Hf	Perform closure heat (energy) calculations.
Audit (only available in Build 138 or earlier) (also see Audit)
Action This setting determines when the Audit tests are performed.	Off	Audit calculations are off.
	WhenNotBusy	Audit calculations will only be carried out when the solver is not busy, i.e. when the model is paused or stopped.
	Continuous	Audit calculations are carried out at every iteration/step.
	OnCount	The user defines at which iterations/steps Audit calculations will be performed, see Count below.
	WhenSolved	Only available in a steady state project. Audit calculations will only be carried out when the project is solved.
Count	Input	This field is only visible if the user has selected OnCount for Action. This defines when the Audit calculations are performed. e.g. if the user chooses 10, then in a steady state project the Audit calculations will be performed at every 10th iteration, or in a dynamic project, at every 10th step.
Level This defines the detail displayed on the Audit Tab.	Streams	Each unit will have stream information displayed on the Audit tab.
	Species	Each unit will have stream and species information displayed on the Audit tab.
Flow.Options This is field is only available in dynamic projects	Off	Do not show any audit flow values.
	Qm	Show mass flows on the audit tab.
Heat.Options	Off	Do not show any audit heat values.
	Hf	Show heat values on the audit tab.
Tear Closure (only available in Build 138 or earlier)
Report (Steady State) In a steady state proejct, this setting determines when the Tear Closure tests are reported.	WhenNotBusy	Tear Closure calculations will always be carried out but condition messages for non-converged tears will only be shown when the solver is not busy, i.e. when the model is paused or stopped.
	Continuous	Condition messages for non-converged tears will be shown at every iteration.
Report (Dynamic) In a dynamic project, this setting determines where Tear Closure messages will appear in the messages window.	None	No Tear Closure messages will be reported in the Messages window.
	Messages	Tear Closure messages will be sent to the Messages tab of the Messages window.
	Conditions	Tear Closure messages will be sent to the Solver Conditions tab of the Messages window.
	Both	Tear Closure messages will be sent to the both the Messages and Solver Conditions tabs of the Messages window.
Action This is field is only available in dynamic projects	None	No action will be taken if tears are not converged.
	Idle	SysCAD will go to Idle mode if tears are not converged within a single time step (which may contain multiple iterations).
Accum.Report This is field is only available in dynamic projects	None	No Tear Closure Accumulation messages will be reported in the Messages window.
	Messages	Tear Closure Accumulation messages will be sent to the Messages tab of the Messages window.
	Conditions	Tear Closure Accumulation messages will be sent to the Solver Conditions tab of the Messages window.
	Both	Tear Closure Accumulation messages will be sent to the both the Messages and Solver Conditions tabs of the Messages window.
Totalisers (Only visible in Dynamic Transfer mode)
Total.Flow.Options	Qm	Show Total mass flow only.
	Qm,Qv	Show Total mass and Total volume flows.
	Qm:AllPhases	Show mass flows for the Total and for all phases.
	Qm,Qv:AllPhases	Show mass and volume flows for Total and for all phases.
FirstFlow.Options	Off	No additional information to be shown when the first flow occurs.
	Step	Show the step that flow first occurs in the pipe since the model started running.
	Time	Show the time that flow first occurs in the pipe since the model started running.
	Step, Time	Show both the step and the time that flow first occurs in the pipe since the model started running.
Direct IO Links (only available in Build 138 or earlier)
Default.Area	List	The default Area Model to which any newly inserted models will belong to by default. This can be changed by the user for each individual model.
Default.MakeupSrc	List	Only available in Build 136. The default Makeup Source. Any newly inserted makeup blocks will have this as their source by default. This can be changed by the user for each individual Makeup Block (MU).
DIO.ConnectSpills	None	No direct IO connection for spills
	All	Always have a direct IO connection for spills
DIO.ConnectLeaks	None	No direct IO connection for leaks
	All	Always have a direct IO connection for leaks
DIO.ConnectAudit	None	No direct IO connection
	All	Always have a direct IO connection
Display Configuration
Value.Zero	Display	The value below which SysCAD will assume zero flow.
Status.ZeroFlow	Display	The value below which the SysCAD display status will indicate zero flow. Note: While the display will indicate zero flow, SysCAD will still use the actual values for calculations.
Status.VapourTest	Display	The value above which the SysCAD display status will indicate vapour flow. Note: While the display will indicate vapour flow, SysCAD will still display any values for liquids and solids.
Status.SolidsTest	Display	The value above which the SysCAD display status will indicate solids flow. Note: While the display will indicate solids flow, SysCAD will still display any values for liquids and vapours.
Old Tag Lookup Management
This refers to the internal renaming of tags due to SysCAD version change. The messages will be displayed to alert users of tag changes, user should manually fix these tags to prevent the messages from appearing in the future. If tags are not changed, SysCAD will attempt to look up a tag rename table to use the new tag. However, some really old tags may no longer work so it is advisable to change the tags to the new syntax as soon as possible.
Tag.ReName.MaxMessages	None	No Tag rename messages will be displayed.
	Limited(1)	One Tag rename message can be displayed.
	Limited(10)	Up to ten Tag rename messages can be displayed.
	All	All Tag rename messages will be displayed.