Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses
Package with base classes for performance data
Information
This package contains performance curves for the cooling capacity and the EIR of DX cooling coils. For performance data of specific DX cooling coils, see the packages Buildings.Fluid.HeatExchangers.DXCoils.Data.SingleSpeed and Buildings.Fluid.HeatExchangers.DXCoils.Data.DoubleSpeed.
The data are described in Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.DXCoil.
Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).
Package Content
Name | Description |
---|---|
NominalValues | Data record of nominal values for water-cooled DX coils |
PerformanceCurve | Data record for a performance curve |
Stage | Generic data record for a stage of a DX coil |
Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.NominalValues
Data record of nominal values for water-cooled DX coils
Information
This is the base record of nominal values for water-cooled DX cooling coil models.
See the information section of Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.DXCoil for a description of the data.
Extends from Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.NominalValues (Data record of nominal values).
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] |
MassFlowRate | mCon_flow_nominal | Nominal water mass flow rate at condensers [kg/s] | |
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.WaterCooled.Data.Generic.BaseClasses.PerformanceCurve
Data record for a performance curve
Information
This record declares the data used to specify performance curves for water-cooled DX coils.
See the information section of Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.DXCoil for a description of the data.
Extends from Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.PerformanceCurve (Data record for a performance curve).
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 | |
Real | capFunFFCon[:] | Polynomial coefficients for cooling capacity function of water flow fration at condensers | |
Real | EIRFunFFCon[:] | Polynomial coefficients for EIR function of water flow fration at condensers | |
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 | |
Real | ffConMin | Minimum water flow fraction at condensers for which performance data are valid | |
Real | ffConMax | Maximum water flow fraction at condensers for which performance data are valid |
Modelica definition
Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.Stage
Generic data record for a stage of a DX coil
Information
This is the base record for water-cooled DX cooling coil performance data at a compressor speed. See the information section of Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.DXCoil for a description of the data.
Extends from Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.Stage (Generic data record for a stage of a air-cooled DX coil).
Parameters
Type | Name | Default | Description |
---|---|---|---|
AngularVelocity | spe | Rotational speed [rad/s] |