Discard Sink

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Navigation: Main Page -> Models -> Other General Models

Related Links: Discard Block (DB), DirectLink

This model is only available in SysCAD 9.3 Build 138 and later versions.

General Description

  • The Discard Sink acts as a sink that can receive material from any number of Discard Blocks which are enabled in units in the project.
  • No configuration of the Discard Sink is required.
  • The Discard Sink will display the individual flows from each unit, as well as the total flow received.
  • The Discard Sink is NOT connected to the Discard Blocks by a normal link. SysCAD creates a DirectLink which is automatically drawn at the Discard Block. It is important to note that no links can be connected to the Discard Sink.

Diagram

Discard Sink.jpg

The Discard Sink unit may be placed on any page in a simulation model. It can then be used on all pages in a model.

Inputs and Outputs

The Discard Sink does not have any inputs or outputs.

The Discard Block(s) are connected indirectly by selecting the name of the required Discard Sink from a drop down list of available discard sinks in the project as shown below:

Discard Sink Selection.png

Data Sections

  1. DiscardSink tab - this is the first Tab and contains genernal information about the Discard Sink.
  2. Total tab - contains a summary of the material sent to the Sink.
  3. QFeed - This and subsequent tab pages, e.g. QFeed.. and Sp, shows the properties of the total material sent to the unit.
  4. Info tab - Contains general settings for the unit and allows the user to include documentation about the unit and create Hyperlinks to external documents.
  5. Links tab, contains a summary table for all the input and output streams.
  6. Audit tab - Contains summary information required for Mass and Energy balance. See Model Examples for enthalpy calculation Examples.

The data sections and variable names are described in detail in the following tables.

Discard Sink Page

UnitType: DiscardSink - The first tab page in the access window will have this name.

Tag (Long/Short) Input / Calc Description / Calculated Variables
Common Data on First Tab Page

Total Page

Tag (Long/Short) Input / Calc Description / Calculated Variables

Results: Total Flow Conditions

State Display Displays the state of the unit.
MassFlow / Qm Display The mass flow into the sink.
VolFlow / Qv Display The volume flow into the sink.
NVolFlow / NQv Display The normalised volume flow into the sink.
Temperature / T Calc The temperature of the material flowing into the sink.
Density / Rho Calc The density of the material flowing into the sink.
NDensity / NRho Display The normalised density of the material flowing into the sink.
Pressure / P Calc The pressure of the material flowing into the sink.

Summary

Total.MassFlow / Qm Calc The total Mass of material flowing into the sink.
Total.VolFlow / Qv Calc The total Volume of material flowing into the sink.
Total.NVolFlow / NQv Calc The total Normalised Volume of material flowing into the sink.
Total.Moles Calc The total number of Moles of material flowing into the sink.
Total.totHs@T Calc The total Sensible Enthalpy of the material flowing into the sink.
Total.totHz@T Calc The total Enthalpy including Phase Change of the material flowing into the sink.
Total.totHf@T Calc The Total Enthalpy of the material flowing into the sink.

Totals

This section displays a list of all units which have discard blocks connected to this discard sink. The three columns of data displayed for each unit are described below:
SourceTag Display The tag of the unit which has at least one discard block connected to this discard sink.
Count Calc The number of discard blocks in the unit which are connected to this discard sink.
MassFlow / Qm Calc The total mass of material flowing from the unit to this discard sink.

Networks

Network.Count Calc The number of networks which have at least one discard block connected to this discard sink.
Network.List Display A list of the Network IDs of the networks which have at least one discard block connected to this discard sink.
This section displays a list of the networks which have discard blocks connected to this discard sink. The five columns displayed for each network are described below:
NetID Calc The Network ID.
DCCount Calc The number of discard blocks within the network which are connected to this discard sink.
MassFlow / Qm Calc The total mass of material flowing from the network to this discard sink.
VolFlow / Qv Calc The total volume of material flowing from the network to this discard sink.
Clipboard Button If this button is pressed, a dropdown list of two options will appear:

Tags: A list of the units within the network which have discard blocks connected to this discard sink will be copied to the clipboard.
Tags Flows: A table of the units within the network which have discard blocks connected to this discard sink, along with their current mass and volume flows, will be copied to the clipboard.

Adding this Model to a Project

Insert into Configuration file

Sort either by DLL or Group.

 

DLL:

Basic1.dll

Units/Links

Process: Discard Sink

or

Group:

General

Units/Links

Process: Discard Sink

See Project Configuration for more information on adding models to the configuration file.


Insert into Project

 

Insert Unit

Process

Discard Sink

See Insert Unit for general information on inserting units.

Hints and Comments

If you want to use discard blocks on several different flowsheets pointing to the same discard sink, then it is recommended that you put the discard sink on a separate flowsheet.