modelPartialParallelElectricEIR

Partial model for electric chiller parallel

Extends from Buildings.Applications.DataCenters.ChillerCooled.Equipment.BaseClasses.PartialPlantParallel.

Information

Partial model that implements parallel electric chillers with associated valves. The model has num identical chillers.

Parameters

TypeNameDefaultDescription
Dynamics › Nominal condition
Modelica.Units.SI.Timetau130Time constant at nominal flow in chillers
Modelica.Units.SI.Timetau230Time constant at nominal flow in chillers
Dynamics › Conservation equations
Modelica.Fluid.Types.DynamicsenergyDynamicsModelica.Fluid.Types.Dynamics.FixedInitialType of energy balance: dynamic (3 initialization options) or steady state
Initialization › Medium 1
Medium1.AbsolutePressurep1_startMedium1.p_defaultStart value of pressure
Medium1.TemperatureT1_startMedium1.T_defaultStart value of temperature
Medium1.MassFraction[Medium1.nX]X1_startMedium1.X_defaultStart value of mass fractions m_i/m
Medium1.ExtraProperty[Medium1.nC]C1_startfill(0, Medium1.nC)Start value of trace substances
Medium1.ExtraProperty[Medium1.nC]C1_nominalfill(1E-2, Medium1.nC)Nominal value of trace substances. (Set to typical order of magnitude.)
Initialization › Medium 2
Medium2.AbsolutePressurep2_startMedium2.p_defaultStart value of pressure
Medium2.TemperatureT2_startMedium2.T_defaultStart value of temperature
Medium2.MassFraction[Medium2.nX]X2_startMedium2.X_defaultStart value of mass fractions m_i/m
Medium2.ExtraProperty[Medium2.nC]C2_startfill(0, Medium2.nC)Start value of trace substances
Medium2.ExtraProperty[Medium2.nC]C2_nominalfill(1E-2, Medium2.nC)Nominal value of trace substances. (Set to typical order of magnitude.)

Components

TypeNameDefaultDescription
Modelica.Blocks.Interfaces.BooleanInput[num]onSet to true to enable compressor, or false to disable compressor
Modelica.Blocks.Interfaces.RealInputTSetSet point for leaving water temperature
Modelica.Blocks.Interfaces.RealOutput[num]PElectric power consumed by chiller compressor
Buildings.Fluid.Chillers.BaseClasses.PartialElectric[num]chi

Revisions

  • March 3, 2022, by Michael Wetter:
    Moved massDynamics to Advanced tab, added assertion and changed type from record to block.
    This is for issue 1542.
  • January 26, 2018, by Michael Wetter:
    Added constrainedby to instance chi in order for the parameter assignments to remain when the chiller is redeclared.
    This is for issue 1118.
  • June 30, 2017, by Yangyang Fu:
    First implementation.