Flow Statistics
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Navigation: Models ➔ Statistical Models ➔ Flow Statistics
| Flow Statistics | General Statistics | Single Variable Histogram | Bivariate Statistics |
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Introduction
This model is used in Dynamic Simulation only.
- The Flow Statistics unit operation can be used to collect statistical information of a FLOW variable.
Some Valid example of the Flow Stats Measured Tags are: - For Pipes/Direct Links: P_001.Qo
- For Ties: X_001.QFeed
- For Makeup Source: ProcessWater.QProd
- When copying the variable for the measured tag, please use Copying Access Window Tab Names only.
- For other variables, for example species flow rate, species concentration, temperature, Level of a tank and so on; use the General Statistics model.
- The Flow Statistics can be reset at Startup by selecting the Statistics tick box on the SysCAD Commands View | Solver Settings - Scenario Tab.
NOTE: User can also use the built in Statistics block in a pipe to collect flow information.
Data Sections
Summary of Data Sections
- FlowStats tab - Contains general information relating to the unit as well as a summary table of each individual statistical blocks.
- S1 tab - The Flow Stat blocks will be displayed here.
- Info tab - Contains general settings for the unit and allows the user to include documentation about the unit and create Hyperlinks to external documents.
Flow Statistics Page
Unit Type: FlowStats The first tab page in the access window will have this name.
| Tag (Long/Short) | Input / Calc | Description/Calculated Variables / Options |
| Tag | Display | This name tag may be modified with the change tag option. |
| Condition | Display | OK if no errors/warnings, otherwise lists errors/warnings. |
| ConditionCount | Display | The current number of errors/warnings. If condition is OK, returns 0. |
| GeneralDescription / GenDesc | Display | This is an automatically generated description for the unit. If the user has entered text in the 'EqpDesc' field on the Info tab (see below), this will be displayed here. If this field is blank, then SysCAD will display the UnitType or SubClass. |
| Requirements | ||
| On | Tick box | Enable or disable all of the independent Flow Stats Blocks. |
| The following message and field is visible when upgrading the project with existing Flow Stat Blocks from SysCAD 9.2 (or earlier) to SysCAD 9.3. Change numbering to start from 1 instead of 0. | ||
| ChangeNumbering | Button | Update Numbering to Start from 1 instead of 0. Only visible if the Flow Stat Blocks was added in SysCAD 9.2 or earlier version. NB: this may affect external tag references such as reports, PGM, please adjust the external references appropriately if updating the numbering. |
| Count | Input | The number of independent Statistics blocks required. This may be any number from 1 upwards. |
| Actions | ||
| Reset_All | Button | Resets all the data collected in the model. |
| Options | ||
| ShowOnePerPage | Tick Box | With this option selected, SysCAD will display each Flow Statistic block per tab page. If not selected, each page displays four Flow Statistic blocks. |
| Check Tags | Button | SysCAD will perform a check on the validity of the tags used. |
| Summary This shows a summary table with the following values for each individual Stats block in the unit. | ||
| Sx | Display | The Flow Stats block number |
| Time | Display | The elapsed time. |
| TotalMass / Mt | Display | The total mass. |
| MassFlowAvg / QmAvg | Display | The average mass flow over total time (including no flow time). |
| MeasTag | Display | The measured Flow Stats tag. |
| TimeNoFlow / TimeZero | Display | The total time where the unit has no flow. |
| OnQmAvg | Display | The average flow over time where unit is on (excluding no flow time). |
S1: Individual Flow Statistic Data Fields
Flow Statistic is displayed on the Sx pages.
- If "ShowOnePerPage" is NOT selected, then each page displays four Flow Statistic blocks.
- If "ShowOnePerPage" is selected, then each page displays one Flow Statistic block.
| Tag (Long/Short) | Input / Calc | Description/Calculated Variables / Options | ||
| [Statistics Block number] | ||||
| Name | Input | Name of the statistics block. Eg. Production | ||
| Index | Display | Statistic block index. Useful for sorting in reports | ||
| Type | Qm | Only the total mass flow tags will be visible. | ||
| Qm,Qv | Total mass and volume flow tags will be visible. | |||
| Qm,Phases | Total mass flow and phase mass flow tags will be visible. | |||
| Qm,Qv,Phases | Total mass and volume as well as phase mass flow tags will be visible. | |||
| MeasTag | Input | This is the variable where statistics information will be collected.
| ||
| ResetStats | Button | Resets the Statistics information. | ||
| Time | Calc | Time elapsed. | ||
| MassFlow / Qm | Calc | The current mass flow rate. | ||
| TotalMass / Mt | Calc | The total mass passed through the unit operation. | ||
| MassFlowAverage / QmAvg | Calc | The average mass flow over total time. | ||
| TimeNoFlow | Calc | The total time where the unit has no flow. | ||
| TimeInvalidFlow / TimeInvalid | Calc | The time where the unit has a value which is not a number (NAN) (shown as '*'). | ||
| OnMassFlowAverage / OnQmAvg | Calc | The average flow over (Total time – Time with Zero Flow). | ||
| MinMassFlow / QmMin | Calc | The minimum flow over Total time. | ||
| MaxMassFlow / QmMax | Calc | The maximum flow over Total time. | ||
| VolFlow / Qv | Calc | The volumetric flowrate. | ||
| TotalVol / Vt | Calc | The total volume passed through the unit operation. | ||
| VolFlowAverage / QvAvg | Calc | The average volumetric flowrate over total time. | ||
| SolidsMassFlow / SQm | Calc | The current Solids Flowrate. | ||
| SolidMass / SMt | Calc | The total Solids passed through the unit operation. | ||
| SolidMassFlowAvg / SQmAvg | Calc | The average solids flowrate over total time. | ||
| LiquidMassFlow / LQm | Calc | The current Liquid Flowrate. | ||
| LiquidMass / LMt | Calc | The total Liquids passed through the unit operation. | ||
| LiquidMassFlowAvg / LQmAvg | Calc | The average Liquid flowrate over total time. | ||
| Delete | Button | This allows the user to Delete the current individual Control block. Please note that there is no 'Undo'! | ||
| MoveUp | Button | This allows the user to increase the Priority of the current individual Control block. For example, if the current Control block is number 3, the user can change it to 2 or 1 by clicking on this button once or twice. | ||
| MoveDown | Button | This allows the user to decrease the Priority of the current individual Control block. For example, if there are 3 Control blocks in the unit and the current Control block is number 1, the user can change it to 2 or 3 by clicking on this button once or twice. | ||
Adding this Model to a Project
Add to Configuration File
Sort either by DLL or Group:
| DLL: | ControlDyn.dll |
→ | Units/Links | → | Statistics: Flow | |
| or | Group: | General |
→ | Units/Links | → | Statistics: Flow |
See Model Selection for more information on adding models to the configuration file.
Insert into Project Flowsheet
| Insert Unit | → | Statistics | → | Flow |
See Insert Unit for general information on inserting units.