modelWetCoilUARated
Model that calculates the UA-value from cooling coil data at rated conditions.
Information
This model calculates the overall heat transfer coefficient, i.e., UA-value, from cooling coil data at rated conditions.
The main limitation of the current implementation is that the rated conditions should correspond to a fully-dry or a fully-wet coil regime. The modeling uncertainty yielded by partially-wet rated conditions has not been assessed yet.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.HeatFlowRate | QTot_flow | Nominal heat flow rate (positive for heat transfer from 1 to 2) | |
| Modelica.Units.SI.Temperature | TAirIn | Air inlet temperature at a rated condition | |
| Modelica.Units.SI.MassFraction | X_wAirIn | Mass fraction of water in inlet air at a rated condition | |
| Modelica.Units.SI.Temperature | TWatIn | Water inlet temperature at a rated condition | |
| Modelica.Units.SI.MassFlowRate | mAir_flow | Air mass flow rate at a rated condition | |
| Modelica.Units.SI.MassFlowRate | mWat_flow | Water mass flow rate at a rated condition | |
| Modelica.Units.SI.ThermalConductance | UA | Overall heat transfer coefficient for a fully dry condition | |
| Real | r_nominal | Ratio between air-side and water-side convective heat transfer at nominal condition | |
| Nominal thermal performance | |||
| Boolean | use_Q_flow_nominal | false | Set to true to specify Q_flow_nominal and inlet conditions, or to false to specify UA_nominal |
Contents
| Name | Description |
|---|---|
 MediumA | |
 MediumW |
Revisions
-
February 18, 2021 by Donghun Kim:
First implementation