modelConvector

Heat exchanger for the water stream

Extends from Buildings.Fluid.Interfaces.PartialTwoPortInterface, Buildings.Fluid.Interfaces.TwoPortFlowResistanceParameters.

Information

In cooling mode, this model adds heat to the water stream. The heat added is equal to:

QBeam = Qrated fΔT fSA fW

In heating mode, the heat is removed from the water stream.

Parameters

TypeNameDefaultDescription
BooleanhomotopyInitializationtrue= true, use homotopy method
Data.GenericperPerformance data
IntegernBeamsNumber of beams in parallel
Dynamics › Nominal condition
Modelica.Units.SI.Timetau30Time constant at nominal flow (if energyDynamics <> SteadyState)
Dynamics › Conservation equations
Modelica.Fluid.Types.DynamicsenergyDynamicsModelica.Fluid.Types.Dynamics.DynamicFreeInitialType of energy balance: dynamic (3 initialization options) or steady state
Initialization
Medium.AbsolutePressurep_startMedium.p_defaultStart value of pressure
Medium.TemperatureT_startMedium.T_defaultStart value of temperature
Medium.MassFraction[Medium.nX]X_startMedium.X_defaultStart value of mass fractions m_i/m
Medium.ExtraProperty[Medium.nC]C_startfill(0, Medium.nC)Start value of trace substances

Components

TypeNameDefaultDescription
Modelica.Blocks.Interfaces.RealInputmAir_flowAir mass flow rate of a single beam
Modelica.Blocks.Interfaces.RealInputTRooRoom air temperature
Modelica.Blocks.Interfaces.RealOutputQ_flowActual capacity of a single beam

Revisions

  • March 3, 2022, by Michael Wetter:
    Removed massDynamics.
    This is for issue 1542.
  • April 14, 2020, by Michael Wetter:
    Changed homotopyInitialization to a constant.
    This is for IBPSA, #1341.
  • November 2, 2016, by Michael Wetter:
    Made assignment of senTem.y final.
  • June 13, 2016, by Michael Wetter:
    Revised implementation.
  • May 20, 2016, by Alessandro Maccarini:
    First implementation.