modelScalableBoiler
Modular Boiler Model - With pump and feedback - Simple PLR regulation
Extends from AixLib.Fluid.Interfaces.PartialTwoPortInterface.
Information
The ModularBoiler package uses the AixLib.Fluid.BoilerCHP.BoilerGeneric model to create an easy to use module.
Configuration options
The model can be configured with or without a pump (hasPump) and with or without a feedback circuit (hasFeedback) for return temperature control.
Furthermore the model can have an internal control for the flow temperature based on a heating curve (use_HeaCur). This allows an easy setup of a direct to use simulation model of the boiler that can be connected to other modules.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| System setup | |||
| Boolean | hasPum | true | Model includes a pump |
| Modelica.Units.SI.HeatFlowRate | Q_flow_nominal | 50000 | Nominal heat flow rate |
| Real | FirRatMin | 0.15 | Minimal firing rate |
| Nominal condition | |||
| Modelica.Units.SI.Temperature | TRet_nominal | 308.15 | Return temperature TCold |
| Modelica.Units.SI.TemperatureDifference | dT_nominal | 20 | Temperature difference nominal |
| Modelica.Units.SI.Temperature | TSup_nominal | 353.15 | Design supply temperature |
| Control › Safety | |||
| Modelica.Units.SI.Temperature | TSup_max | 363.15 | Maximal temperature to force shutdown |
| Modelica.Units.SI.Temperature | TRet_min | 313.15 | Minimum return temperature, at which the system is shut down |
| Modelica.Units.SI.Time | time_minOff | 900 | Time after which the device can be turned on again |
| Modelica.Units.SI.Time | time_minOn | 900 | Time after which the device can be turned off again |
| Control › Heating Curve | |||
| Boolean | use_HeaCur | false | Use heating curve to set flow temperature |
| Boolean | use_tableData | true | Choose between tables or function to calculate TSet |
| Real | declination | 1 | |
| Real | day_hour | 6 | |
| Real | night_hour | 22 | |
| Utilities.Time.Types.ZeroTime | zerTim | AixLib.Utilities.Time.Types.ZeroTime.NY2017 | Enumeration for choosing how reference time (time = 0) should be defined. Used for heating curve |
| Modelica.Units.SI.ThermodynamicTemperature | TOffset | 0 | Offset to heating curve temperature |
| Control › Flow temperature | |||
| Real | kFloTem | 0.05 | Gain of controller |
| Modelica.Units.SI.Time | TiFloTem | 10 | Time constant of Integrator block |
| Feedback | |||
| Boolean | hasFedBac | true | circuit has Feedback |
| Modelica.Units.SI.PressureDifference | dp_Valve | Pressure Difference set in regulating valve for pressure equalization in heating system | |
| Real | Kv | Kv (metric) flow coefficient [m3/h/(bar)^(1/2)] | |
| Control › Feedback | |||
| Real | kFedBac | 1 | Gain of controller |
| Modelica.Units.SI.Time | TiFeedBack | 0.5 | Time constant of Integrator block |
| Real | yMaxFedBac | 0.99 | Upper limit of output |
| Real | yMinFedBac | 0.01 | Lower limit of output |
| Dynamics | |||
| Modelica.Fluid.Types.Dynamics | energyDynamics | Modelica.Fluid.Types.Dynamics.DynamicFreeInitial | Type of energy balance: dynamic (3 initialization options) or steady state |
| Initialization | |||
| Modelica.Media.Interfaces.Types.Temperature | T_start | Medium.T_default | Start value of temperature |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Fluid.BoilerCHP.BoilerGeneric | boiGen | ||
| AixLib.Fluid.Sensors.TemperatureTwoPort | senTSup | Temperature sensor of hot side of heat generator (supply) | |
| AixLib.Fluid.Sensors.TemperatureTwoPort | senTRet | Temperature sensor of cold side of heat generator (supply) | |
| AixLib.Fluid.Movers.SpeedControlled_y | pum | Boiler Pump | |
| AixLib.Fluid.Actuators.Valves.ThreeWayEqualPercentageLinear | val | ||
| AixLib.Controls.Interfaces.BoilerControlBus | boiBus | ||
| AixLib.Systems.ScalableGenerationModules.ScalableBoiler.Controls.BoilerControl | boiCtr | Central control unit of boiler | |
| Modelica.Blocks.Sources.Constant | conPum |
Contents
| Name | Description |
|---|---|
| MediumWater | Boiler Medium |
| HeatingCurveFunction |
Revisions
-
June, 2023 by Moritz Zuschlag; David Jansen
First Implementation (see issue #1147)