blockFreezeProtectionMixedAir

Freeze protection based on mixed air temperature
Diagram of FreezeProtectionMixedAirOpen the diagram
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Information

Block that tracks the mixed air temperature TMix using a PI controller and outputs a freeze protection control signal yFrePro and its inverse yFreProInv.

Parameters

TypeNameDefaultDescription
Buildings.Controls.OBC.CDL.Types.SimpleControllercontrollerTypeBuildings.Controls.OBC.CDL.Types.SimpleController.PIType of controller
Realk0.1Gain
RealTi120Time constant of integrator block
RealTd0.1Time constant of derivative block
RealTFreSet279.15Lower limit for mixed air temperature for freeze protection

Connectors

TypeNameDefaultDescription
Buildings.Controls.OBC.CDL.Interfaces.RealInputTMixMixed air temperature measurement
Buildings.Controls.OBC.CDL.Interfaces.RealOutputyFreProFreeze protection control signal, 0 if no frost, 1 if TMix below TFreSet
Buildings.Controls.OBC.CDL.Interfaces.RealOutputyFreProInvInverse freeze protection control signal, 1 if no frost, 0 if TMix below TFreSet

Components

TypeNameDefaultDescription
Buildings.Controls.OBC.CDL.Reals.PIDconController for mixed air to track freeze protection set point

Revisions

  • November 2, 2017, by Milica Grahovac:
    First implementation.