Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses
Package with base classes for performance data
Information
This package contains performance curves for the cooling capacity and the EIR of air-cooled DX cooling coils. For performance data of specific air-cooled DX cooling coils, see the packages Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.SingleSpeed and Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.DoubleSpeed.
The data are described in Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.DXCoil.
Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).
Package Content
Name | Description |
---|---|
nominalValuesToString | Converts the nominal values to a string representation |
NominalValues | Data record of nominal values |
PerformanceCurve | Data record for a performance curve |
Stage | Generic data record for a stage of a air-cooled DX coil |
Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.nominalValuesToString
Converts the nominal values to a string representation
Information
Returns a string representation of the nominal values.
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Type | Name | Default | Description |
---|---|---|---|
NominalValues | nomVal | Nominal values |
Outputs
Type | Name | Description |
---|---|---|
String | s | A string representation of the nominal values |
Modelica definition
Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.NominalValues
Data record of nominal values
Information
This is the base record of nominal values for air-cooled DX cooling coil models.
See the information section of Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.DXCoil for a description of the data.
Extends from Modelica.Icons.Record (Icon for records).
Parameters
Type | Name | Default | Description |
---|---|---|---|
Nominal condition | |||
HeatFlowRate | Q_flow_nominal | Nominal cooling capacity (negative number) [W] | |
Real | COP_nominal | Nominal coefficient of performance | |
Real | SHR_nominal | Nominal sensible heat ratio | |
MassFlowRate | m_flow_nominal | Nominal air mass flow rate at evaporators [kg/s] | |
Temperature | TEvaIn_nominal | 273.15 + 19.4 | Evaporator entering air wet-bulb temperature at rating condition [K] |
Temperature | TConIn_nominal | 308.15 | Condenser entering temperature at rating condition (wet bulb for evaporative cooled coils, dry bulb for air cooled) [K] |
Pressure | p_nominal | 101325 | Atmospheric pressure [Pa] |
Nominal | |||
Real | phiIn_nominal | 0.5 | Relative humidity of entering air at nominal condition |
Re-evaporation data | |||
Time | tWet | 1400 | Time until moisture drips from coil when a dry coil is switched on [s] |
Real | gamma | 1.5 | Ratio of evaporation heat transfer divided by latent heat transfer at nominal conditions |
Modelica definition
Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.PerformanceCurve
Data record for a performance curve
Information
This record declares the data used to specify performance curves for air-cooled DX coils.
See the information section of Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.DXCoil for a description of the data.
Extends from Modelica.Icons.Record (Icon for records).
Parameters
Type | Name | Default | Description |
---|---|---|---|
Performance curves | |||
Real | capFunT[6] | Biquadratic coefficients for cooling capacity function of temperature | |
Real | capFunFF[:] | Polynomial coefficients for cooling capacity function of flow fration | |
Real | EIRFunT[6] | Biquadratic coefficients for EIR function of temperature | |
Real | EIRFunFF[:] | Polynomial coefficients for EIR function of flow fration | |
Minimum and maximum values | |||
Temperature | TConInMin | Minimum condenser inlet temperature for cooling capacity function [K] | |
Temperature | TConInMax | Maximum condenser inlet temperature for cooling capacity function [K] | |
Temperature | TEvaInMin | Minimum evaporator inlet temperature for cooling capacity function [K] | |
Temperature | TEvaInMax | Maximum evaporator inlet temperature for cooling capacity function [K] | |
Real | ffMin | Minimum flow fraction for which performance data are valid | |
Real | ffMax | Maximum flow fraction for which performance data are valid |
Modelica definition
Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.Stage
Generic data record for a stage of a air-cooled DX coil
Information
This is the base record for air-cooled DX cooling coil model at a compressor speed. See the information section of Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.DXCoil for a description of the data.
Extends from Modelica.Icons.Record (Icon for records).
Parameters
Type | Name | Default | Description |
---|---|---|---|
AngularVelocity | spe | Rotational speed [rad/s] | |
NominalValues | nomVal | redeclare parameter Building... | Nominal values |
PerformanceCurve | perCur | redeclare parameter Building... | Performance curves for this stage |