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
Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.NominalValues NominalValues Data record of nominal values for water-cooled DX coils
Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.PerformanceCurve PerformanceCurve Data record for a performance curve
Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.Stage Stage Generic data record for a stage of a DX coil

Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.NominalValues 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

TypeNameDefaultDescription
Nominal condition
HeatFlowRateQ_flow_nominal Nominal cooling capacity (negative number) [W]
RealCOP_nominal Nominal coefficient of performance
RealSHR_nominal Nominal sensible heat ratio
MassFlowRatem_flow_nominal Nominal air mass flow rate at evaporators [kg/s]
TemperatureTEvaIn_nominal273.15 + 19.4Evaporator entering air wet-bulb temperature at rating condition [K]
TemperatureTConIn_nominal308.15Condenser entering temperature at rating condition (wet bulb for evaporative cooled coils, dry bulb for air cooled) [K]
Pressurep_nominal101325Atmospheric pressure [Pa]
MassFlowRatemCon_flow_nominal Nominal water mass flow rate at condensers [kg/s]
Nominal
RealphiIn_nominal0.5Relative humidity of entering air at nominal condition
Re-evaporation data
TimetWet1400Time until moisture drips from coil when a dry coil is switched on [s]
Realgamma1.5Ratio of evaporation heat transfer divided by latent heat transfer at nominal conditions

Modelica definition

record NominalValues "Data record of nominal values for water-cooled DX coils" extends Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.NominalValues; //-----------------------------Nominal conditions-----------------------------// parameter Modelica.SIunits.MassFlowRate mCon_flow_nominal "Nominal water mass flow rate at condensers"; end NominalValues;

Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.PerformanceCurve 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

TypeNameDefaultDescription
Performance curves
RealcapFunT[6] Biquadratic coefficients for cooling capacity function of temperature
RealcapFunFF[:] Polynomial coefficients for cooling capacity function of flow fration
RealEIRFunT[6] Biquadratic coefficients for EIR function of temperature
RealEIRFunFF[:] Polynomial coefficients for EIR function of flow fration
RealcapFunFFCon[:] Polynomial coefficients for cooling capacity function of water flow fration at condensers
RealEIRFunFFCon[:] Polynomial coefficients for EIR function of water flow fration at condensers
Minimum and maximum values
TemperatureTConInMin Minimum condenser inlet temperature for cooling capacity function [K]
TemperatureTConInMax Maximum condenser inlet temperature for cooling capacity function [K]
TemperatureTEvaInMin Minimum evaporator inlet temperature for cooling capacity function [K]
TemperatureTEvaInMax Maximum evaporator inlet temperature for cooling capacity function [K]
RealffMin Minimum flow fraction for which performance data are valid
RealffMax Maximum flow fraction for which performance data are valid
RealffConMin Minimum water flow fraction at condensers for which performance data are valid
RealffConMax Maximum water flow fraction at condensers for which performance data are valid

Modelica definition

record PerformanceCurve "Data record for a performance curve" extends Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.PerformanceCurve; //-----------------------------Performance curves-----------------------------// parameter Real capFunFFCon[:] "Polynomial coefficients for cooling capacity function of water flow fration at condensers"; parameter Real EIRFunFFCon[:] "Polynomial coefficients for EIR function of water flow fration at condensers"; //------------------------Range for performance curves------------------------// parameter Real ffConMin "Minimum water flow fraction at condensers for which performance data are valid"; parameter Real ffConMax "Maximum water flow fraction at condensers for which performance data are valid"; end PerformanceCurve;

Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.Stage Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.Stage

Generic data record for a stage of a DX coil

Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.Stage

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

TypeNameDefaultDescription
AngularVelocityspe Rotational speed [rad/s]

Modelica definition

record Stage "Generic data record for a stage of a DX coil" extends Buildings.Fluid.HeatExchangers.DXCoils.AirCooled.Data.Generic.BaseClasses.Stage (redeclare parameter Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.NominalValues nomVal, redeclare parameter Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled.Data.Generic.BaseClasses.PerformanceCurve perCur); end Stage;