modelThreeWayEqualPercentageLinear

Three way valve with equal percentage and linear characteristics

Extends from BaseClasses.PartialThreeWayValve.

Information

Three way valve with equal percentage characteristics between port_1 and port_2 and linear opening characteristic between port_3 and port_2. Such opening characteristics were typical for valves from Landis & Gyr (now Siemens).

This model is based on the partial valve models Buildings.Fluid.Actuators.BaseClasses.PartialThreeWayValve and Buildings.Fluid.Actuators.BaseClasses.PartialTwoWayValve. See Buildings.Fluid.Actuators.BaseClasses.PartialThreeWayValve for the implementation of the three way valve and see Buildings.Fluid.Actuators.BaseClasses.PartialTwoWayValve for the implementation of the regularization near the origin.

Parameters

TypeNameDefaultDescription
RealR50Rangeability, R=50...100 typically
Realdelta00.01Range of significant deviation from equal percentage law

Revisions

  • March 7, 2022, by Michael Wetter:
    Set final massDynamics=energyDynamics.
    This is for #1542.
  • June 10, 2021, by Michael Wetter:
    Changed implementation of the filter and changed the parameter order to a constant as most users need not change this value.
    This is for #1498.
  • February 21, 2020, by Michael Wetter:
    Changed icon to display its operating stage.
    This is for #1294.
  • November 5, 2019, by Michael Wetter:
    Moved assignment of leakage from Buildings.Fluid.Actuators.BaseClasses.PartialThreeWayValve to the parent classes.
    This is for #1227.
  • February 20, 2012 by Michael Wetter:
    Renamed parameter dp_nominal to dpValve_nominal, and added new parameter dpFixed_nominal. See Buildings.Fluid.Actuators.UsersGuide.
  • February 14, 2012 by Michael Wetter:
    Added filter to approximate the travel time of the actuator.
  • March 25, 2011, by Michael Wetter:
    Added homotopy method.
  • June 16, 2008 by Michael Wetter:
    First implementation.