Buildings.Fluids.Sensors

Package Content

Name	Description
EnthalpyFlowRate	Ideal enthalphy flow rate sensor
Examples	Collection of models that illustrate model use and test models
WetBulbTemperature	Ideal wet bulb temperature sensor

Buildings.Fluids.Sensors.EnthalpyFlowRate

Information

This component monitors the enthalphy flow rate of the medium in the flow between fluid ports. The sensor is ideal, i.e., it does not influence the fluid.

Parameters

Type	Name	Default	Description
replaceable package Medium		PartialMedium	Medium in the sensor
Advanced
Temp	flowDirection	Modelica_Fluid.Types.FlowDir...	Unidirectional (port_a -> port_b) or bidirectional flow component

Connectors

Type	Name	Description
FluidPort_a	port_a
FluidPort_b	port_b
output RealOutput	H_flow	Enthalpy flow rate, positive if from port_a to port_b [W]

Modelica definition

model EnthalpyFlowRate "Ideal enthalphy flow rate sensor" 
  extends Modelica_Fluid.Sensors.BaseClasses.PartialFlowSensor;
  extends Modelica.Icons.RotationalSensor;
  Modelica.Blocks.Interfaces.RealOutput H_flow(unit="W") 
    "Enthalpy flow rate, positive if from port_a to port_b";
  
equation 
  H_flow = port_a.H_flow;
end EnthalpyFlowRate;

Buildings.Fluids.Sensors.WetBulbTemperature

Information

This component monitors the wet bulb temperature of the medium in the flow between fluid ports. The sensor is ideal, i.e., it does not influence the fluid.

Parameters

Type	Name	Default	Description
replaceable package Medium		PartialMedium	Medium in the sensor
Advanced
Temp	flowDirection	Modelica_Fluid.Types.FlowDir...	Unidirectional (port_a -> port_b) or bidirectional flow component

Connectors

Type	Name	Description
FluidPort_a	port_a
FluidPort_b	port_b
output RealOutput	TWB	Wet bulb temperature in port medium [K]

Modelica definition

model WetBulbTemperature "Ideal wet bulb temperature sensor" 
  import SI = Modelica.SIunits;
  extends Modelica_Fluid.Sensors.BaseClasses.PartialFlowSensor;
  Medium.BaseProperties medium;
  Modelica.Blocks.Interfaces.RealOutput TWB(unit = "K", start=293.15) 
    "Wet bulb temperature in port medium";
  
  Buildings.Utilities.Psychrometrics.WetBulbTemperature wetBulMod(
               redeclare package Medium = Medium) 
    "Model for wet bulb temperature";
  
equation 
  port_a.p = medium.p;
  h  = medium.h;
  Xi = medium.Xi;
  
  // compute wet bulb temperature
  wetBulMod.dryBul.h  = medium.h;
  wetBulMod.dryBul.p  = medium.p;
  wetBulMod.dryBul.Xi = medium.Xi;
  TWB = wetBulMod.wetBul.T;
  
end WetBulbTemperature;