Buildings.Fluid.DXSystems.Heating.AirSource.Data.Generic.BaseClasses
Package with base classes for performance data
Information
This package contains performance curves for the heat transfer capacity and the EIR of air source DX coils.
The data are described in Buildings.Fluid.DXSystems.Heating.AirSource.Data.Generic.DXCoil.
Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).
Package Content
| Name | Description |
|---|---|
 NominalValues
|
Data record of nominal values |
| PerformanceCurve
|
Data record for a performance curve |
| Stage
|
Generic data record for a stage of a air source DX coil |
Buildings.Fluid.DXSystems.Heating.AirSource.Data.Generic.BaseClasses.NominalValues
Data record of nominal values
Information
This is the base record of nominal values for air source DX heating coil models.
See the information section of Buildings.Fluid.DXSystems.Heating.AirSource.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 capacity [W] | |
| Real | COP_nominal | Nominal coefficient of performance [1] | |
| MassFlowRate | m_flow_nominal | Nominal air mass flow rate at evaporators [kg/s] | |
| Temperature | TEvaIn_nominal | 292.55 | Evaporator entering air wet-bulb temperature at rating condition [K] |
| Temperature | TConIn_nominal | 308.15 | Condenser entering temperature at rating condition [K] |
| Pressure | p_nominal | 101325 | Atmospheric pressure [Pa] |
| Nominal | |||
| Real | phiIn_nominal | 0.5 | Relative humidity of entering air at nominal condition [1] |
Modelica definition
record NominalValues "Data record of nominal values"
extends Modelica.Icons.Record;
//-----------------------------Nominal conditions-----------------------------//
parameter Modelica.Units.SI.HeatFlowRate Q_flow_nominal(final min=0)
"Nominal capacity";
parameter Real COP_nominal(final unit="1") "Nominal coefficient of performance";
parameter Modelica.Units.SI.MassFlowRate m_flow_nominal
"Nominal air mass flow rate at evaporators";
parameter Modelica.Units.SI.Temperature TEvaIn_nominal=292.55
"Evaporator entering air wet-bulb temperature at rating condition";
parameter Modelica.Units.SI.Temperature TConIn_nominal=308.15
"Condenser entering temperature at rating condition";
parameter Real phiIn_nominal(final unit="1")=0.5
"Relative humidity of entering air at nominal condition";
parameter Modelica.Units.SI.Pressure p_nominal=101325
"Atmospheric pressure";
//Non-configurable parameters, required to maintain compatibility
// between heating and cooling coil baseclasses//
final parameter Real SHR_nominal(final unit="1")=0
"Nominal sensible heat ratio";
final parameter Modelica.Units.SI.Time tWet=0
"Time until moisture drips from coil when a dry coil is switched on";
final parameter Real gamma(min=0) = 0
"Ratio of evaporation heat transfer divided by latent heat transfer at nominal conditions";
end NominalValues;
Buildings.Fluid.DXSystems.Heating.AirSource.Data.Generic.BaseClasses.PerformanceCurve
Data record for a performance curve
Information
This record declares the data used to specify performance curves for air source DX coils.
See the information section of Buildings.Fluid.DXSystems.Heating.AirSource.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 heating capacity function of temperature | |
| Real | capFunFF[:] | Polynomial coefficients for heating 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 heating capacity function [K] | |
| Temperature | TConInMax | Maximum condenser inlet temperature for heating capacity function [K] | |
| Temperature | TEvaInMin | Minimum evaporator inlet temperature for heating capacity function [K] | |
| Temperature | TEvaInMax | Maximum evaporator inlet temperature for heating 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
record PerformanceCurve "Data record for a performance curve"
extends Modelica.Icons.Record;
//-----------------------------Performance curves-----------------------------//
parameter Real capFunT[6]
"Biquadratic coefficients for heating capacity function of temperature";
parameter Real capFunFF[:]
"Polynomial coefficients for heating capacity function of flow fration";
parameter Real EIRFunT[6]
"Biquadratic coefficients for EIR function of temperature";
parameter Real EIRFunFF[:]
"Polynomial coefficients for EIR function of flow fration";
//------------------------Range for performance curves------------------------//
parameter Modelica.Units.SI.Temperature TConInMin
"Minimum condenser inlet temperature for heating capacity function";
parameter Modelica.Units.SI.Temperature TConInMax
"Maximum condenser inlet temperature for heating capacity function";
parameter Modelica.Units.SI.Temperature TEvaInMin
"Minimum evaporator inlet temperature for heating capacity function";
parameter Modelica.Units.SI.Temperature TEvaInMax
"Maximum evaporator inlet temperature for heating capacity function";
parameter Real ffMin
"Minimum flow fraction for which performance data are valid";
parameter Real ffMax
"Maximum flow fraction for which performance data are valid";
end PerformanceCurve;
Buildings.Fluid.DXSystems.Heating.AirSource.Data.Generic.BaseClasses.Stage
Generic data record for a stage of a air source DX coil
Information
This is the base record for air source DX coil model at a particular compressor speed. See the information section of Buildings.Fluid.DXSystems.Heating.AirSource.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 |
Modelica definition
record Stage "Generic data record for a stage of a air source DX coil"
extends Modelica.Icons.Record;
parameter Modelica.Units.SI.AngularVelocity spe(displayUnit="1/min")
"Rotational speed";
replaceable parameter Buildings.Fluid.DXSystems.Heating.AirSource.Data.Generic.BaseClasses.NominalValues
nomVal "Nominal values";
replaceable parameter Buildings.Fluid.DXSystems.Heating.AirSource.Data.Generic.BaseClasses.PerformanceCurve
perCur "Performance curves for this stage";
end Stage;