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Composition Tracking Analysis Rule

The Composition Tracking Analysis Rule uses an inventory mixing Models and the results from a mass or volume balance on a Sigmafine Model to compute the material composition of flows, transfers, and inventories.

\The topics in this folder describe how to configure the Composition Tracking Analysis Rule for use with Sigmafine models. Instances of this analysis rule can be applied to the same model, given different contexts, and applied to different Models within the database.

Note: The Composition Tracking Analysis Rule requires the use of elements based on the Sigmafine Element Templates. It also may require that a Sigmafine Mass or Volume Balance has been configured with a minimum of two Cases to use as source data.

After the Composition Tracking Analysis Rule is configured you can create a Case and run a composition tracking analysis on the case.

Use the Composition Tracking Analysis Rule to perform composition tracking Cases for Models based on the Sigmafine templates and other analysis rules. The Cases store the composition tracking results.

The following points describe how the Composition Tracking Analysis Rule works:

  • For its source data, the Composition Tracking Analysis Rule may use the Case results of a Mass Balance or Volume Balance Analysis Rule within the same model. This depends on the balance rule that is selected. If used, this source analysis must have at least two cases. The Case times for the Composition Tracking Analysis Rule must match the Case times in the associated analysis rule.
  • The Collect Inputs stage of the analysis can be configured in two ways. The Collect Inputs stage of Composition Tracking analysis can copy all the data from the source associated analysis rule case, including adjustments, to the Composition Tracking analysis case. Alternatively, if the Composition Tracking analysis is not associated with a source analysis rule, the Collect Inputs stage executes only the "Collect Inputs” stage of the mass or volume balance.
  • Composition Tracking performs a balance based on the Composition Tracking Rule that you select in the configuration process. If imbalances exist, loss transfers are created to make each inventory balance. Then the composition tracking solver executes the mixing rules and writes the results back to the case.
  • The result of the Composition Tracking analysis is the calculated material compositions of the selected elements in the model. These compositions are stored in an Attribute of each selected inventory element. In addition, flows and transfers that come from or go to a balance point that have the composition tracking balance flag set to true also have compositions stored in an Attribute of the flow or transfer element.
  • The configuration of the Analysis Rule allows you to choose which rule to apply (the basis: volume or mass) and whether measured or reconciled data is to be used for the analysis. The rules are described in detail in the next section.

Note: The compositions of the inventories that participate in the composition tracking analysis have to be initialized by the user for the first case.