Template:Split Thermal Data Section

The Split Thermal (SplitT) tab page can be used to specify how heat is distributed with the streams.

Tag (Long/Short)	Input/Calc	Description
Mixture temperature before thermal split
Feed.MassFlow / Qm	Feedback	Only available in Build 139.31388 or later. The mass flow of the mixture before splitting of streams.
Feed.Temperature / T	Feedback	The temperature of the mixture before splitting of streams - this is the temperature in the unit.
Condition	Feedback	OK if no errors, otherwise displays error message.
AllowHX	Tickbox	Selecting this option allows the user to specify temperatures for all outgoing streams. SysCAD will add or remove energy to conserve the energy across the unit operation. Any energy added/removed will be shown on the HeatFlow field.
UseSplitFlowsPriority	Tickbox	Only available in Build 139.31424 or later. If selected, the order of streams on the SplitT page will match the order on the Split page. If not selected, then the user will be able to set the priorities for each stream on the SplitT page, independent of the order on the Split page.
HeatFlow	FeedBack	In older builds, this was only visible when the AllowHX option had been enabled. This shows the amount of energy added or removed in order to achieve the temperatures specified by the user.
HeatCorrection	FeedBack	Only available in Build 139.31388 or later. Only visible when the AllowHX option has NOT been enabled. This shows the amount of energy that would need to be added or removed in order to achieve the temperatures specified by the user. This will only be non-zero if the required temperatures can not be achieved.
TIOs.[stream name]...
Order	FeedBack	This can be changed using the Priority field (if available).
Priority	List	This is used to change the order of the output streams if the Required or Change modes are selected. In Build 139.31388 or later, it is only available if the UseSplitFlowsPriority option has NOT been enabled.
Mode (See Options and Examples for more info)	Required	The user may specify the required temperature of the outlet stream. This temperature may be limited by the temperature change limits specified.
	Change	The user may specify the required temperature change for the outlet stream. This temperature may be limited by the temperature change limits specified.
	FreeDiff	The user can set a temperature difference for the selected outlet stream to the streams that are set at Free. For example, if the unit operation has two outlet streams, stream 1 is set at FreeDiff = 10, stream 2 is set at Free, then Stream 1 will be 10 degrees hotter than stream 2 when solved. This temperature may be limited by the temperature change limits specified.
	Free	The user may not specify any outlet temperature requirements, SysCAD will determine the outlet temperature. If Free is used for all streams then all streams will have the same outlet temperature (same behaviour as when SplitT model is not used at all).
TemperatureReqd / T_Reqd	Input	This is visible with mode set to Required, use this to specify the stream outlet temperature.
TempChange	Input	This is visible with mode set to Change, use this to specify the stream outlet temperature change.
TempDiff	Input	This is visible with mode set to FreeDiff, use this to specify the stream outlet temperature difference for the current stream and the streams that are set at Free.
TemperatureOut / To	FeedBack	This is the outlet temperature for the stream.
Result	FeedBack	This shows whether the user specified temperature conditions have been achieved. NOTE: Fraction of the target is based on required temperature change that has been achieved.
Achieved	FeedBack	This shows the fraction of the required temperature change that has been achieved.
MassFlow / Qm	Feedback	Only available in Build 139.31388 or later. The mass flow of the stream, after the split logic has been applied.
Temperature change limits:
FinalT.Min	Input	The minimum temperature of the mixture leaving the unit operation. If the balance stream temperature falls below this minimum when the AllowHX option is ticked, heat will be added to make it up to the minimum temperature. If AllowHX option is not selected, all outlet stream temperatures will be adjusted to keep a balance of heat.
FinalT.Max	Input	The maximum temperature of the mixture leaving the unit operation. If the balance stream temperature is above this maximum when the AllowHX option is ticked, heat will be removed to limit it to the maximum temperature. If AllowHX option is not selected, all outlet stream temperatures will be adjusted to keep a balance of heat.
ChangeT.Limit	Tickbox	Selecting this option allows the user to specify temperature limits for all outgoing streams. If AllowHX option is selected, SysCAD will add or remove heat to conserve the energy across the unit operation. Any energy added/removed will be shown on the PowerInput field.
ChangeT.MaxDrop	Input	Only visible if ChangeT.Limit is enabled. This is the maximum amount that any stream be below the Feed temperature of the SplitT block.
ChangeT.MaxRise	Input	Only visible if ChangeT.Limit is enabled. This is the maximum amount that any stream be above the Feed temperature of the SplitT block.