.AixLib.Obsolete.YearIndependent.FastHVAC.Components.Valves.ThermostaticValve .AixLib.Obsolete.YearIndependent.FastHVAC.Components.Valves.ThermostaticValveThermostatic valve model.
The thermostatic valve model is designed as a pump controller. The mass flow set value is calculated based on nominal mass flow and the temperature difference between the setpoint and actual value.
The valve opening characteristic is described by the function
valveCharacteristic, linear characteristic by default,
can be replaced by any user-defined function. Equal percentage with
customizable rangeability and an optimal characteristic are already
provided by the library.
With the optional parameter "filteredOpening", the opening can be filtered with a second order, criticalDamping filter so that the opening demand is delayed by parameter "riseTime". The filtered opening is then available via the output signal "opening_filtered" and is used to control the valve equations. This approach approximates the driving device of a valve. The "riseTime" parameter is used to compute the cut-off frequency of the filter by the equation: f_cut = 5/(2*pi*riseTime). It defines the time that is needed until opening_filtered reaches 99.6 % of a step input of opening.
| Name | Description |
|---|---|
 valveCharacteristic | Inherent flow characteristic |