modelWetCoilEffectivenessNTUMassFlow

Model that tests the wet coil effectiveness-NTU model with variable mass flow rates
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Extends from Modelica.Icons.Example (Icon for runnable examples), Buildings.Fluid.HeatExchangers.Examples.BaseClasses.EffectivenessNTUMassFlow (Partial model of epsilon-NTU coil that tests variable mass flow rates).

Information

This example is similar to Buildings.Fluid.HeatExchangers.Examples.DryCoilEffectivenessNTUMassFlow except that the coil model Buildings.Fluid.HeatExchangers.DryCoilEffectivenessNTU is replaced here by Buildings.Fluid.HeatExchangers.WetCoilEffectivenessNTU.

Parameters

TypeNameDefaultDescription
Modelica.Units.SI.TemperatureT_a1_nominal (from EffectivenessNTUMassFlow)5 + 273.15Nominal water inlet temperature
Modelica.Units.SI.TemperatureT_b1_nominal (from EffectivenessNTUMassFlow)10 + 273.15Nominal water outlet temperature
Modelica.Units.SI.TemperatureT_a2_nominal (from EffectivenessNTUMassFlow)30 + 273.15Nominal air inlet temperature
Modelica.Units.SI.TemperatureT_b2_nominal (from EffectivenessNTUMassFlow)15 + 273.15Nominal air outlet temperature
Modelica.Units.SI.HeatFlowRateQ_flow_nominal (from EffectivenessNTUMassFlow)m1_flow_nominal*4200*(T_a1_nominal - T_b1_nominal)Nominal heat transfer
Modelica.Units.SI.MassFlowRatem1_flow_nominal (from EffectivenessNTUMassFlow)0.1Nominal mass flow rate medium 1
Modelica.Units.SI.MassFlowRatem2_flow_nominal (from EffectivenessNTUMassFlow)m1_flow_nominal*4200/1000*(T_a1_nominal - T_b1_nominal)/(T_b2_nominal - T_a2_nominal)Nominal mass flow rate medium 2

Components

TypeNameDefaultDescription
Buildings.Fluid.Sources.MassFlowSource_Tsin_2 (from EffectivenessNTUMassFlow)Sink for air
Buildings.Fluid.Sources.Boundary_pTsou_2 (from EffectivenessNTUMassFlow)Source for air
Buildings.Fluid.Sources.MassFlowSource_Tsin_1 (from EffectivenessNTUMassFlow)Sink for water
Buildings.Fluid.Sources.Boundary_pTsou_1 (from EffectivenessNTUMassFlow)Source for water
Modelica.Blocks.Sources.ConstantrelHum (from EffectivenessNTUMassFlow)Relative humidity
Buildings.Utilities.Psychrometrics.X_pTphix_pTphi (from EffectivenessNTUMassFlow)
Modelica.Blocks.Sources.ConstanttemSou_2 (from EffectivenessNTUMassFlow)Temperature boundary condition
Modelica.Blocks.Math.GainmWat_flow (from EffectivenessNTUMassFlow)Water mass flow rate
Modelica.Blocks.Sources.TimeTablemWatGai (from EffectivenessNTUMassFlow)Gain for water mass flow rate
Modelica.Blocks.Sources.TimeTablemAirGai (from EffectivenessNTUMassFlow)Gain for air mass flow rate
Modelica.Blocks.Math.GainmAir_flow (from EffectivenessNTUMassFlow)Air mass flow rate
Buildings.Fluid.HeatExchangers.WetCoilEffectivenessNTUhexHeat exchanger
Sensors.RelativeHumidityTwoPortsenRelHumRelative humidity sensor

Revisions

  • March 17, 2017, by Michael O'Keefe:
    First implementation.