modelCHP_Boiler_Storage
Extends from Base.Systems.
Information
1. Purpose of model
Combination of CHP and boiler models to be used in the energyConverter.
2. Level of detail, physical effects considered, and physical insight
(Purely technical component without physical modeling.)
3. Limits of validity
(Purely technical component without physical modeling.)
4. Interfaces
TransiEnt.Basics.Interfaces.Combined.HouseholdDemandIn demand
Conditional interfaces depending on the technologies selected:
TransiEnt.Basics.Interfaces.Electrical.ApparentPowerPort epp - connection to electrical grid
TransiEnt.Basics.Interfaces.Gas.RealGasPortIn gasPortIn - connection to gas grid
5. Nomenclature
(no remarks)
6. Governing Equations
(no remarks)
7. Remarks for Usage
The model contains models for a CHP unit, a thermal storage tank, a gas boiler and a controller for the operation of the CHP unit and the boiler. Different control modes can be selected.
8. Validation
(no remarks)
9. References
(no remarks)
10. Version History
Model created by Anne Hagemeier, Fraunhofer UMSICHT in 2017
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | el_grid (from Systems) | ||
| Boolean | gas_grid (from Systems) | ||
| Boolean | DHN (from Systems) | ||
| System setup | |||
| Boolean | useGasPort | true | True if gas port shall be used |
| CHP | |||
| SI.Power | P_el_n_CHP | 4000 | Electric power output of CHP |
| SI.HeatFlowRate | Q_flow_n_CHP | 6000 | Thermal power output of CHP |
| Real | eta_CHP | 0.9 | Total efficiency of the CHP |
| Boiler | |||
| Real | eta_boiler | 0.8 | Efficiency of the boiler |
| SI.Power | Q_flow_n_boiler | 6000 | Nominal heat output of Boiler |
| Storage | |||
| SI.Volume | V_Storage | 0.5 | Volume of heat storage |
| SI.Height | height | 1.3 | Height of heat storage |
| SI.Diameter | d | sqrt(V_Storage/height*4/Modelica.Constants.pi) | Diameter of heat storage |
| SI.Temperature | T_start | 353.15 | Start temperature |
| Modelica.Units.NonSI.Temperature_degC | T_amb | 15 | Assumed constant ambient temperature |
| SI.SurfaceCoefficientOfHeatTransfer | k | 0.08 | Coefficient of heat Transfer |
| SI.HeatCapacity | cp_storage | 4180 | Heat capacity of storage medium |
| SI.Density | rho | 977 | Density of storage medium |
| Fluid Definition | |||
| TILMedia.VLEFluidTypes.BaseVLEFluid | FuelMedium | simCenter.gasModel1 | Medium to be used for fuel gas |
| SI.SpecificEnthalpy | HoC_gas | 40e6 | Heat of combustion of fuel, will be used if gasport is deactivated in model |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.Basics.Interfaces.Combined.HouseholdDemandIn | demand (from Systems) | Electricity, space heating, water heating | |
| TransiEnt.Basics.Interfaces.Thermal.FluidPortIn | waterPortIn (from Systems) | ||
| TransiEnt.Basics.Interfaces.Thermal.FluidPortOut | waterPortOut (from Systems) | ||
| TransiEnt.Basics.Interfaces.Electrical.ApparentPowerPort | epp (from Systems) | ||
| TransiEnt.Basics.Interfaces.Gas.RealGasPortIn | gasPortIn (from Systems) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.SimCenter | simCenter (from Systems) | ||
| SI.Temperature | T_s_max | 353.15 | Maximum Temperature of Storage |
| SI.Temperature | T_s_min | 333.15 | Minimum storage temperature |
| TransiEnt.Storage.Heat.HotWaterStorage_constProp_L2.HotWaterStorage_constProp_L2 | Storage | ||
| TransiEnt.Components.Boundaries.Electrical.ApparentPower.ApparentPower | apparentPower | ||
| Modelica.Blocks.Math.Add | addGeneration | ||
| Modelica.Blocks.Math.Add | addDemand | ||
| TransiEnt.Producer.Combined.SmallScaleCHP.SmallScaleCHP_simple.SmallScaleCHP_simple | smallScaleCHP_simple | ||
| TransiEnt.Producer.Heat.Gas2Heat.SimpleGasBoiler.SimpleBoiler | gasBoilerGasAdaptive | ||
| TransiEnt.Producer.Combined.SmallScaleCHP.SmallScaleCHP_simple.Control.ControlBoilerCHP_modulatingBoiler_HeatLed | controller |