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 IBPSA.Fluid.Actuators.BaseClasses.PartialThreeWayValve and IBPSA.Fluid.Actuators.BaseClasses.PartialTwoWayValve. See IBPSA.Fluid.Actuators.BaseClasses.PartialThreeWayValve for the implementation of the three way valve and see IBPSA.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

  • February 20, 2012 by Michael Wetter:
    Renamed parameter dp_nominal to dpValve_nominal, and added new parameter dpFixed_nominal. See IBPSA.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.