The components of this package are provided for the convenience of people working mostly with Celsius units, since all models in package HeatTransfer are based on Kelvin units.
Note, that in package SIunits.Conversions, functions are provided to convert between the units Kelvin, degree Celsius, degree Fahrenheit, and degree Rankine. These functions allow, e.g., a direct conversion of units at all places where Kelvin is required as parameter. Example:
import SIunits.Conversions.*; Modelica.Thermal.HeatTransfer.HeatCapacitor C(T0 = from_degC(20));
Extends from Modelica.Icons.Library2 (Icon for library where additional icon elements shall be added).
|ToKelvin||Conversion block from °Celsius to Kelvin|
|FromKelvin||Conversion from Kelvin to °Celsius|
|FixedTemperature||Fixed temperature boundary condition in degree Celsius|
|PrescribedTemperature||Variable temperature boundary condition in °Celsius|
|TemperatureSensor||Absolute temperature sensor in °Celsius|
This component converts an input signal from Celsius to Kelvin and provide is as output signal.
model ToKelvin "Conversion block from °Celsius to Kelvin" Modelica.Blocks.Interfaces.RealInput Celsius; Modelica.Blocks.Interfaces.RealOutput Kelvin; equation Kelvin = from_degC(Celsius); end ToKelvin;
This component converts an input signal from Kelvin to Celsius and provides is as output signal.
model FromKelvin "Conversion from Kelvin to °Celsius" Modelica.Blocks.Interfaces.RealInput Kelvin; Modelica.Blocks.Interfaces.RealOutput Celsius; equation Celsius = to_degC(Kelvin); end FromKelvin;
This model defines a fixed temperature T at its port in [degC], i.e., it defines a fixed temperature as a boundary condition.
|Temperature_degC||T||Fixed Temperature at the port [degC]|
model FixedTemperature "Fixed temperature boundary condition in degree Celsius" parameter Modelica.SIunits.Conversions.NonSIunits.Temperature_degC T "Fixed Temperature at the port"; Interfaces.HeatPort_b port; equation port.T = from_degC(T); end FixedTemperature;
This model represents a variable temperature boundary condition The temperature value in [degC] is given by the input signal to the model. The effect is that an instance of this model acts as an infinite reservoir able to absorb or generate as much energy as required to keep the temperature at the specified value.
model PrescribedTemperature "Variable temperature boundary condition in °Celsius" Interfaces.HeatPort_b port; Modelica.Blocks.Interfaces.RealInput T; equation port.T = from_degC(T); end PrescribedTemperature;
This is an ideal absolute temperature sensor which returns the temperature of the connected port in Celsius as an output signal. The sensor itself has no thermal interaction with whatever it is connected to. Furthermore, no thermocouple-like lags are associated with this sensor model.
model TemperatureSensor "Absolute temperature sensor in °Celsius" Modelica.Blocks.Interfaces.RealOutput T; Interfaces.HeatPort_a port; equation T = to_degC(port.T); port.Q_flow = 0; end TemperatureSensor;