modelTraceSubstanceConservationDynamicBalance
This test checks if trace substance mass flow rates are conserved when a dynamic balance is used
Extends from IBPSA.Fluid.MixingVolumes.Validation.BaseClasses.TraceSubstanceConservation.
Information
This test checks if the trace substance flow rate is
conserved when adding moisture to a mixing volume that is configured to steady state.
The trace substance flow rate at the inlet and outlet should be equal
since the trace substance concentration should not
be affected by the independent mass fraction concentration.
Note, however, that there is some approximation error because in its default configuration, the conservation balance models simplify the treatment of the water that is added to the fluid. See IBPSA.Fluid.Interfaces.StaticTwoPortConservationEquation and IBPSA.Fluid.Interfaces.StaticTwoPortConservationEquation for a discussion.
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Continuous.Integrator | intTraSubIn | Integrator for trace substance inlet | |
| Modelica.Blocks.Continuous.Integrator | intTraSubOut | Integrator for trace substance outlet | |
| Modelica.Blocks.Sources.RealExpression | reaExp | Mixing volume total species mass | |
| Modelica.Blocks.Math.Add | cheConMas | Check for conservation of mass | |
| Modelica.Blocks.Math.Add3 | add3 | Conservation of mass | |
| Modelica.Blocks.Sources.Constant | zero | Zero input |
Revisions
-
November 3, 2016, by Michael Wetter:
Removed wrong assignment forC_nominal.
This is for issue 568. -
November 2, 2016, by Michael Wetter:
Changed assertions to blocks that compute the difference, and added the difference to the regression results.
This is for issue 564. -
May 22 2015 by Filip Jorissen:
First implementation.