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

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

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	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

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

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

Type	Name	Default	Description
AngularVelocity	spe		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;