modelVolumeFlowRate
Volume flow rate sensor
Extends from Buildings.Templates.Components.Interfaces.PartialSensor (Interface class for sensor).
Information
This is a model for a volume flow rate sensor that can be
enabled or disabled with the Boolean parameter have_sen.
If disabled, the control input variable y is removed
and the model is a direct fluid pass-through.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Templates.Components.Types.SensorVolumeFlowRate | typ | Type of volume flow rate sensor | |
| Assumptions | |||
| Boolean | allowFlowReversal (from PartialTwoPort) | true | = false to simplify equations, assuming, but not enforcing, no flow reversal |
| Nominal condition | |||
| Modelica.Units.SI.MassFlowRate | m_flow_nominal (from PartialTwoPortInterface) | Nominal mass flow rate | |
| Advanced | |||
| Modelica.Units.SI.MassFlowRate | m_flow_small (from PartialTwoPortInterface) | 1E-4*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow |
| Advanced › Diagnostics | |||
| Boolean | show_T (from PartialTwoPortInterface) | false | = true, if actual temperature at port is computed |
| Configuration | |||
| Boolean | have_sen (from PartialSensor) | true | Set to true for sensor, false for direct pass through |
| Boolean | isDifPreSen (from PartialSensor) | false | Set to true for differential pressure sensor, false for any other sensor |
| Graphics | |||
| Integer | text_rotation (from PartialSensor) | 0 | Text rotation angle in icon layer |
| Boolean | text_flip (from PartialSensor) | false | True to flip text horizontally in icon layer |
| Buildings.Templates.Components.Types.IntegrationPoint | icon_pipe (from PartialSensor) | Buildings.Templates.Components.Types.IntegrationPoint.None | Pipe symbol |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Fluid.Interfaces.FluidPort_a | port_a (from PartialTwoPort) | Fluid connector a (positive design flow direction is from port_a to port_b) | |
| Modelica.Fluid.Interfaces.FluidPort_b | port_b (from PartialTwoPort) | Fluid connector b (positive design flow direction is from port_a to port_b) | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | y (from PartialSensor) | Connector for measured value |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.MassFlowRate | m_flow (from PartialTwoPortInterface) | port_a.m_flow | Mass flow rate from port_a to port_b (m_flow > 0 is design flow direction) |
| Modelica.Units.SI.PressureDifference | dp (from PartialTwoPortInterface) | port_a.p - port_b.p | Pressure difference between port_a and port_b |
| Medium.ThermodynamicState | sta_a (from PartialTwoPortInterface) | if allowFlowReversal then Medium.setState_phX(port_a.p, noEvent(actualStream(port_a.h_outflow)), noEvent(actualStream(port_a.Xi_outflow))) else Medium.setState_phX(port_a.p, noEvent(inStream(port_a.h_outflow)), noEvent(inStream(port_a.Xi_outflow))) | Medium properties in port_a |
| Medium.ThermodynamicState | sta_b (from PartialTwoPortInterface) | if allowFlowReversal then Medium.setState_phX(port_b.p, noEvent(actualStream(port_b.h_outflow)), noEvent(actualStream(port_b.Xi_outflow))) else Medium.setState_phX(port_b.p, noEvent(port_b.h_outflow), noEvent(port_b.Xi_outflow)) | Medium properties in port_b |
| Buildings.Fluid.Sensors.VolumeFlowRate | senVolFlo | Volume flow rate sensor | |
| Buildings.Templates.Components.Routing.PassThroughFluid | pas | Pass through |