.AixLib.Fluid.HeatExchangers.Heater_T .AixLib.Fluid.HeatExchangers.Heater_TModel for an ideal heater that controls its outlet temperature to a prescribed outlet temperature.
This model forces the outlet temperature at port_b
to be no lower than the temperature of the input signal
TSet, subject to optional limits on the capacity. By
default, the model has unlimited heating capacity.
The output signal Q_flow is the heat added to the
medium if the mass flow rate is from port_a to
port_b. If the flow is reversed, then
Q_flow=0.
The outlet conditions at port_a are not affected by
this model, other than for a possible pressure difference due to
flow friction.
If the parameter energyDynamics is different from
Modelica.Fluid.Types.Dynamics.SteadyState, the
component models the dynamic response using a first order
differential equation. The time constant of the component is equal
to the parameter tau. This time constant is adjusted
based on the mass flow rate using
τeff = τ |ṁ| ⁄ ṁnom
where τeff is the effective time constant for the given mass flow rate ṁ and τ is the time constant at the nominal mass flow rate ṁnom. This type of dynamics is equal to the dynamics that a completely mixed control volume would have.
Optionally, this model can have a flow resistance. Set
dp_nominal = 0 to disable the flow friction
calculation.
For a similar model that is a sensible cooling device, use AixLib.Fluid.HeatExchangers.SensibleCooler_T. For a model that uses a control signal u ∈ [0, 1] and multiplies this with the nominal heating or cooling power, use AixLib.Fluid.HeatExchangers.HeaterCooler_u
If the flow is from port_b to port_a,
then the enthalpy of the medium is not affected by this model.
The model has been validated against the analytical solution in the examples AixLib.Fluid.HeatExchangers.Validation.PrescribedOutlet and AixLib.Fluid.HeatExchangers.Validation.PrescribedOutlet_dynamic.