modelCHP_PT1
Extends from AixLib.Obsolete.BaseClasses.ObsoleteModel (Icon for classes that are obsolete and will be removed in later versions).
Information
Overview
Simple model for a electricity driven CHP. using record
Concept
There are two possibilities for parameterization. The first is based on records for CHP characteristics from the FastHVAC.DataBase. In this case the electrical and thermal efficiency of the CHP is a function of return temperature, water mass flow rate and electrical power.
The second possibility is to set the parameters manually (compare: Parameters-Unit properties). In this case the set values are constant.
The electrical and thermal behavior of the CHP is represented by PT1 transfer function. The control strategy is pretended from an external controller. There is an ON/OFF switch for the boiler and also a possibility to control the modulating operation, CHPs electrical capacity. Furthermore a switch counter is implemented.
Example Results
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | selectable | true | CHP record |
| FastHVAC.Data.CHP.BaseDataDefinition | param | FastHVAC.Data.CHP.Ecopower() | Paramter contains data from CHP records |
| FastHVAC.Media.BaseClasses.MediumSimple | medium | FastHVAC.Media.WaterSimple() | Standard flow charastics for water (heat capacity, density, thermal conductivity) |
| Real | LHV | 47300000 | Lower heating value [J/kg] |
| Modelica.Units.SI.Temperature | T0 | Modelica.Units.Conversions.from_degC(20) | Initial temperature |
| Unit properties | |||
| Modelica.Units.SI.Efficiency | eta_el | 0.25 | CHP's electrical efficiency |
| Modelica.Units.SI.Efficiency | eta_th | 0.65 | CHP's thermal efficiency |
| Modelica.Units.SI.Power | capP_el | 1000 | CHPs electrical capacity |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.BooleanInput | onOff | CHP on/off switch | |
| FastHVAC.Interfaces.EnthalpyPort_b | enthalpyPort_b | ||
| FastHVAC.Interfaces.EnthalpyPort_a | enthalpyPort_a | ||
| Modelica.Blocks.Interfaces.RealOutput[3] | Energy | 1=W_el 2=Q_th 3=E_fuel | |
| Modelica.Blocks.Interfaces.RealOutput[3] | Capacity | 1=P_el 2=dotQ_th 3=dotE_fuel | |
| Modelica.Blocks.Interfaces.RealInput | P_elRel | Capacity of electrical power [0 to 1] |
Components
Revisions
-
November 28, 2016 Tobias Blacha:
Moved into AixLib -
February 09, 2015 Konstantin Finkbeiner:
Implemented