Buildings.Templates.Components.Sensors
Sensor models
Information
This package contains models for sensors.
Extends from Modelica.Icons.VariantsPackage (Icon for package containing variants).
Package Content
| Name | Description |
|---|---|
 DifferentialPressure
|
Differential pressure sensor |
 HumidityRatio
|
Humidity ratio sensor |
 SpecificEnthalpy
|
Specific enthalpy sensor |
 Temperature
|
Temperature sensor |
 VolumeFlowRate
|
Volume flow rate sensor |
Buildings.Templates.Components.Sensors.DifferentialPressure
Differential pressure sensor
Information
This is a model for a differential pressure 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 simply consists of two fluid ports that are not connected
to each other and for which the following equations are used.
So the model must still be provided with pressure conditions
at each port.
// Zero flow equations
port_(a|b).m_flow = 0;
// No contribution of specific quantities
port_(a|b).h_outflow = 0;
port_(a|b).Xi_outflow = zeros(Medium.nXi);
port_(a|b).C_outflow = zeros(Medium.nC);
Extends from Buildings.Templates.Components.Interfaces.PartialSensor (Interface class for sensor).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | PartialMedium | Medium in the component | |
| Nominal condition | |||
| MassFlowRate | m_flow_nominal | 0 | Nominal mass flow rate [kg/s] |
| Configuration | |||
| Boolean | have_sen | true | Set to true for sensor, false for direct pass through |
| Boolean | isDifPreSen | true | Set to true for differential pressure sensor, false for any other sensor |
| Assumptions | |||
| Boolean | allowFlowReversal | true | = false to simplify equations, assuming, but not enforcing, no flow reversal |
| Advanced | |||
| MassFlowRate | m_flow_small | 1E-4*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow [kg/s] |
| Diagnostics | |||
| Boolean | show_T | false | = true, if actual temperature at port is computed |
| Graphics | |||
| Integer | text_rotation | 0 | Text rotation angle in icon layer |
| Boolean | text_flip | false | True to flip text horizontally in icon layer |
| IconPipe | icon_pipe | Buildings.Templates.Componen... | Pipe symbol |
Connectors
| Type | Name | Description |
|---|---|---|
| FluidPort_a | port_a | Fluid connector a (positive design flow direction is from port_a to port_b) |
| FluidPort_b | port_b | Fluid connector b (positive design flow direction is from port_a to port_b) |
| output RealOutput | y | Connector for measured value [Pa] |
Modelica definition
model DifferentialPressure "Differential pressure sensor"
extends Buildings.Templates.Components.Interfaces.PartialSensor(
y(final unit="Pa", displayUnit="Pa"),
final m_flow_nominal=0,
final isDifPreSen=true);
Buildings.Fluid.Sensors.RelativePressure senRelPre(
redeclare final package Medium=Medium) if have_sen
"Relative pressure sensor";
equation
connect(port_a, senRelPre.port_a);
connect(senRelPre.p_rel, y);
connect(senRelPre.port_b, port_b);
end DifferentialPressure;
Buildings.Templates.Components.Sensors.HumidityRatio
Humidity ratio sensor
Information
This is a model for a humidity ratio (in kg/kg dry air) 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.
Extends from Buildings.Templates.Components.Interfaces.PartialSensor (Interface class for sensor).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | PartialMedium | Medium in the component | |
| Nominal condition | |||
| MassFlowRate | m_flow_nominal | Nominal mass flow rate [kg/s] | |
| Configuration | |||
| Boolean | have_sen | true | Set to true for sensor, false for direct pass through |
| Boolean | isDifPreSen | false | Set to true for differential pressure sensor, false for any other sensor |
| Assumptions | |||
| Boolean | allowFlowReversal | true | = false to simplify equations, assuming, but not enforcing, no flow reversal |
| Advanced | |||
| MassFlowRate | m_flow_small | 1E-4*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow [kg/s] |
| Diagnostics | |||
| Boolean | show_T | false | = true, if actual temperature at port is computed |
| Graphics | |||
| Integer | text_rotation | 0 | Text rotation angle in icon layer |
| Boolean | text_flip | false | True to flip text horizontally in icon layer |
| IconPipe | icon_pipe | Buildings.Templates.Componen... | Pipe symbol |
Connectors
| Type | Name | Description |
|---|---|---|
| FluidPort_a | port_a | Fluid connector a (positive design flow direction is from port_a to port_b) |
| FluidPort_b | port_b | Fluid connector b (positive design flow direction is from port_a to port_b) |
| output RealOutput | y | Connector for measured value [kg/kg] |
Modelica definition
model HumidityRatio "Humidity ratio sensor"
extends Buildings.Templates.Components.Interfaces.PartialSensor(
y(final unit="kg/kg"),
final isDifPreSen=false);
Buildings.Fluid.Sensors.MassFractionTwoPort senMasFra(
redeclare final package Medium=Medium,
final m_flow_nominal=m_flow_nominal,
final allowFlowReversal=allowFlowReversal) if have_sen
"Mass fraction sensor";
Buildings.Utilities.Psychrometrics.ToDryAir toDryAir if have_sen
"Conversion into kg/kg dry air";
Buildings.Templates.Components.Routing.PassThroughFluid pas(
redeclare final package Medium = Medium,
final allowFlowReversal=allowFlowReversal) if not have_sen "Pass through";
equation
connect(port_a, senMasFra.port_a);
connect(senMasFra.port_b, port_b);
connect(senMasFra.X, toDryAir.XiTotalAir);
connect(port_a, pas.port_a);
connect(pas.port_b, port_b);
connect(toDryAir.XiDry, y);
end HumidityRatio;
Buildings.Templates.Components.Sensors.SpecificEnthalpy
Specific enthalpy sensor
Information
This is a model for a specific enthalpy 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.
Extends from Buildings.Templates.Components.Interfaces.PartialSensor (Interface class for sensor).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | PartialMedium | Medium in the component | |
| Nominal condition | |||
| MassFlowRate | m_flow_nominal | Nominal mass flow rate [kg/s] | |
| Configuration | |||
| Boolean | have_sen | true | Set to true for sensor, false for direct pass through |
| Boolean | isDifPreSen | false | Set to true for differential pressure sensor, false for any other sensor |
| Assumptions | |||
| Boolean | allowFlowReversal | true | = false to simplify equations, assuming, but not enforcing, no flow reversal |
| Advanced | |||
| MassFlowRate | m_flow_small | 1E-4*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow [kg/s] |
| Diagnostics | |||
| Boolean | show_T | false | = true, if actual temperature at port is computed |
| Graphics | |||
| Integer | text_rotation | 0 | Text rotation angle in icon layer |
| Boolean | text_flip | false | True to flip text horizontally in icon layer |
| IconPipe | icon_pipe | Buildings.Templates.Componen... | Pipe symbol |
Connectors
| Type | Name | Description |
|---|---|---|
| FluidPort_a | port_a | Fluid connector a (positive design flow direction is from port_a to port_b) |
| FluidPort_b | port_b | Fluid connector b (positive design flow direction is from port_a to port_b) |
| output RealOutput | y | Connector for measured value [J/kg] |
Modelica definition
model SpecificEnthalpy "Specific enthalpy sensor"
extends Buildings.Templates.Components.Interfaces.PartialSensor(
y(final unit="J/kg"),
final isDifPreSen=false);
Buildings.Fluid.Sensors.SpecificEnthalpyTwoPort senSpeEnt(
redeclare final package Medium=Medium,
final m_flow_nominal=m_flow_nominal,
final allowFlowReversal=allowFlowReversal) if have_sen
"Specific enthalpy sensor";
Buildings.Templates.Components.Routing.PassThroughFluid pas(
redeclare final package Medium = Medium,
final allowFlowReversal=allowFlowReversal) if not have_sen "Pass through";
equation
connect(port_a,senSpeEnt. port_a);
connect(senSpeEnt.port_b, port_b);
connect(port_a, pas.port_a);
connect(pas.port_b, port_b);
connect(senSpeEnt.h_out, y);
end SpecificEnthalpy;
Buildings.Templates.Components.Sensors.Temperature
Temperature sensor
Information
This is a model for a dry bulb temperature 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.
Extends from Buildings.Templates.Components.Interfaces.PartialSensor (Interface class for sensor).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | PartialMedium | Medium in the component | |
| SensorTemperature | typ | Buildings.Templates.Componen... | Type of temperature sensor |
| Nominal condition | |||
| MassFlowRate | m_flow_nominal | Nominal mass flow rate [kg/s] | |
| Configuration | |||
| Boolean | have_sen | true | Set to true for sensor, false for direct pass through |
| Boolean | isDifPreSen | false | Set to true for differential pressure sensor, false for any other sensor |
| Assumptions | |||
| Boolean | allowFlowReversal | true | = false to simplify equations, assuming, but not enforcing, no flow reversal |
| Advanced | |||
| MassFlowRate | m_flow_small | 1E-4*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow [kg/s] |
| Diagnostics | |||
| Boolean | show_T | false | = true, if actual temperature at port is computed |
| Graphics | |||
| Integer | text_rotation | 0 | Text rotation angle in icon layer |
| Boolean | text_flip | false | True to flip text horizontally in icon layer |
| IconPipe | icon_pipe | Buildings.Templates.Componen... | Pipe symbol |
Connectors
| Type | Name | Description |
|---|---|---|
| FluidPort_a | port_a | Fluid connector a (positive design flow direction is from port_a to port_b) |
| FluidPort_b | port_b | Fluid connector b (positive design flow direction is from port_a to port_b) |
| output RealOutput | y | Connector for measured value [K] |
Modelica definition
model Temperature "Temperature sensor"
extends Buildings.Templates.Components.Interfaces.PartialSensor(
y(final unit="K", displayUnit="degC"),
final isDifPreSen=false);
parameter Buildings.Templates.Components.Types.SensorTemperature typ=
Buildings.Templates.Components.Types.SensorTemperature.Standard
"Type of temperature sensor";
Buildings.Fluid.Sensors.TemperatureTwoPort senTem(
redeclare final package Medium=Medium,
final m_flow_nominal=m_flow_nominal) if have_sen
"Temperature sensor";
Buildings.Templates.Components.Routing.PassThroughFluid pas(redeclare final
package Medium = Medium) if not have_sen "Pass through";
equation
connect(port_a, senTem.port_a);
connect(senTem.port_b, port_b);
connect(port_a, pas.port_a);
connect(pas.port_b, port_b);
connect(senTem.T, y);
end Temperature;
Buildings.Templates.Components.Sensors.VolumeFlowRate
Volume flow rate 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.
Extends from Buildings.Templates.Components.Interfaces.PartialSensor (Interface class for sensor).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | PartialMedium | Medium in the component | |
| SensorVolumeFlowRate | typ | Type of volume flow rate sensor | |
| Nominal condition | |||
| MassFlowRate | m_flow_nominal | Nominal mass flow rate [kg/s] | |
| Configuration | |||
| Boolean | have_sen | true | Set to true for sensor, false for direct pass through |
| Boolean | isDifPreSen | false | Set to true for differential pressure sensor, false for any other sensor |
| Assumptions | |||
| Boolean | allowFlowReversal | true | = false to simplify equations, assuming, but not enforcing, no flow reversal |
| Advanced | |||
| MassFlowRate | m_flow_small | 1E-4*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow [kg/s] |
| Diagnostics | |||
| Boolean | show_T | false | = true, if actual temperature at port is computed |
| Graphics | |||
| Integer | text_rotation | 0 | Text rotation angle in icon layer |
| Boolean | text_flip | false | True to flip text horizontally in icon layer |
| IconPipe | icon_pipe | Buildings.Templates.Componen... | Pipe symbol |
Connectors
| Type | Name | Description |
|---|---|---|
| FluidPort_a | port_a | Fluid connector a (positive design flow direction is from port_a to port_b) |
| FluidPort_b | port_b | Fluid connector b (positive design flow direction is from port_a to port_b) |
| output RealOutput | y | Connector for measured value [m3/s] |
Modelica definition
model VolumeFlowRate "Volume flow rate sensor"
extends Buildings.Templates.Components.Interfaces.PartialSensor(
y(final unit="m3/s"),
final isDifPreSen=false);
parameter Buildings.Templates.Components.Types.SensorVolumeFlowRate typ
"Type of volume flow rate sensor";
Buildings.Fluid.Sensors.VolumeFlowRate senVolFlo(
redeclare final package Medium=Medium,
final m_flow_nominal=m_flow_nominal) if have_sen
"Volume flow rate sensor";
Buildings.Templates.Components.Routing.PassThroughFluid pas(redeclare final
package Medium = Medium) if not have_sen "Pass through";
equation
connect(port_a, senVolFlo.port_a);
connect(senVolFlo.port_b, port_b);
connect(port_a, pas.port_a);
connect(pas.port_b, port_b);
connect(senVolFlo.V_flow, y);
end VolumeFlowRate;