modelWetCoilDryRegime
Fully dry coil model
Information
This model implements the calculation for a 100% dry coil.
See Buildings.Fluid.HeatExchangers.DryCoilEffectivenessNTU for documentation.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | delta | 1E-3 | Small value used for smoothing |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.ThermalConductance | UAWat | UA for water side | |
| Modelica.Units.SI.MassFlowRate | mWat_flow | Mass flow rate for water | |
| Modelica.Units.SI.MassFlowRate | mWatNonZer_flow | Mass flow rate for water, bounded away from zero | |
| Modelica.Units.SI.SpecificHeatCapacity | cpWat | Specific heat capacity of water | |
| Modelica.Units.SI.Temperature | TWatIn | Water temperature at inlet | |
| Modelica.Units.SI.ThermalConductance | UAAir | UA for air side | |
| Modelica.Units.SI.MassFlowRate | mAir_flow | Mass flow rate of air | |
| Modelica.Units.SI.MassFlowRate | mAirNonZer_flow | Mass flow rate for air, bounded away from zero | |
| Modelica.Units.SI.SpecificHeatCapacity | cpAir | Specific heat capacity of moist air at constant pressure | |
| Modelica.Units.SI.Temperature | TAirIn | Temperature of air at inlet | |
| Buildings.Fluid.Types.HeatExchangerFlowRegime | cfg | Flow regime of the heat exchanger | |
| Modelica.Units.SI.MassFlowRate | mAir_flow_nominal | Nominal mass flow rate for air | |
| Modelica.Units.SI.MassFlowRate | mWat_flow_nominal | Nominal mass flow rate for water | |
| Modelica.Units.SI.HeatFlowRate | QTot_flow | Heat transferred from water to air | |
| Modelica.Units.SI.Temperature | TWatOut | Temperature of water at outlet | |
| Modelica.Units.SI.Temperature | TAirOut | Temperature of air at the outlet | |
| Real | eps | Effectiveness for heat exchanger | |
| Modelica.Units.SI.ThermalConductance | CWat_flow | mWat_flow*cpWat | Capacitance rate of water |
| Modelica.Units.SI.ThermalConductance | CAir_flow | mAir_flow*cpAir | Capacitance rate of air |
| Modelica.Units.SI.ThermalConductance | CMin_flow_nominal | min(mAir_flow_nominal*cpAir, mWat_flow_nominal*cpWat) | Minimum capacity rate |
| Modelica.Units.SI.ThermalConductance | CMax_flow_nominal | max(mAir_flow_nominal*cpAir, mWat_flow_nominal*cpWat) | Maximum capacity rate |
| Modelica.Units.SI.ThermalConductance | CMin_flow | Buildings.Utilities.Math.Functions.smoothMin(x1 = CAir_flow, x2 = CWat_flow, deltaX = 1E-3*(CMax_flow_nominal - CMin_flow_nominal)) | Minimum capacity rate |
| Modelica.Units.SI.ThermalConductance | UA | Overall heat transfer coefficient | |
| Modelica.Units.SI.Temperature | TSurAirOut | Surface Temperature at air outlet |
Revisions
-
Jan 21, 2021, by Donghun Kim:
First implementation.