modelWetCoilCounterFlowPControl

Model that demonstrates use of a heat exchanger with condensation and with feedback control
Diagram of WetCoilCounterFlowPControlOpen the diagram
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Extends from Modelica.Icons.Example (Icon for runnable examples), Buildings.Fluid.HeatExchangers.Examples.BaseClasses.PartialWetCoilCounterFlow (Partial model that demonstrates use of a heat exchanger with condensation and with feedback control).

Information

This model demonstrates the use of Buildings.Fluid.HeatExchangers.WetCoilCounterFlow. The valve on the water-side is regulated to track a setpoint temperature for the air outlet.

Parameters

TypeNameDefaultDescription
Modelica.Units.SI.TemperatureT_a1_nominal (from PartialWetCoilCounterFlow)5 + 273.15
Modelica.Units.SI.TemperatureT_b1_nominal (from PartialWetCoilCounterFlow)10 + 273.15
Modelica.Units.SI.TemperatureT_a2_nominal (from PartialWetCoilCounterFlow)30 + 273.15
Modelica.Units.SI.TemperatureT_b2_nominal (from PartialWetCoilCounterFlow)15 + 273.15
Modelica.Units.SI.MassFlowRatem1_flow_nominal (from PartialWetCoilCounterFlow)0.1Nominal mass flow rate medium 1
Modelica.Units.SI.MassFlowRatem2_flow_nominal (from PartialWetCoilCounterFlow)0.2*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.Boundary_pTsin_2 (from PartialWetCoilCounterFlow)
Buildings.Fluid.Sources.Boundary_pTsou_2 (from PartialWetCoilCounterFlow)
Buildings.Fluid.Sources.Boundary_pTsin_1 (from PartialWetCoilCounterFlow)
Buildings.Fluid.Sources.Boundary_pTsou_1 (from PartialWetCoilCounterFlow)
Buildings.Fluid.FixedResistances.PressureDropres_2 (from PartialWetCoilCounterFlow)
Buildings.Fluid.FixedResistances.PressureDropres_1 (from PartialWetCoilCounterFlow)
Buildings.Fluid.Sensors.TemperatureTwoPorttemSen (from PartialWetCoilCounterFlow)
Buildings.Fluid.Actuators.Valves.TwoWayEqualPercentageval (from PartialWetCoilCounterFlow)Control valve
Modelica.Blocks.Sources.TimeTableTSet (from PartialWetCoilCounterFlow)Setpoint temperature
Buildings.Fluid.HeatExchangers.WetCoilCounterFlowhex (from PartialWetCoilCounterFlow)
Modelica.Blocks.Sources.Constantconst (from PartialWetCoilCounterFlow)
Buildings.Utilities.Psychrometrics.X_pTphix_pTphi (from PartialWetCoilCounterFlow)
Modelica.Blocks.Sources.Constantconst1 (from PartialWetCoilCounterFlow)
Modelica.Blocks.Sources.RampTWat (from PartialWetCoilCounterFlow)Water temperature, raised to high value at t=3000 s
Buildings.Controls.Continuous.LimPIDconController

Revisions

  • December 14, 2023 by Jianjun Hu:
    Reduced the nominal airflow rate and the water temperature. This is for #3607.
  • December 22, 2014 by Michael Wetter:
    Removed Modelica.Fluid.System to address issue #311.
  • March 1, 2013, by Michael Wetter:
    Added nominal pressure drop for valve as this parameter no longer has a default value.
  • May 27, 2010, by Michael Wetter:
    First implementation.