modelPV_elHeater
Extends from Base.Systems.
Information
1. Purpose of model
Combination of gas boiler, PV, electric heater and thermal storage 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
TransiEnt.Basics.Interfaces.Electrical.ApparentPowerPort epp - connection to electrical grid
5. Nomenclature
(no remarks)
6. Governing Equations
(no remarks)
7. Remarks for Usage
The model contains models for an electric heater, a thermal storage tank, a PV module, an inverter, a gas boiler and a controller for the operation of the electrical heater. The heater will be switched on in case of PV power exceeding the electrical demand of the household and if the storage tank is not full.
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 |
| String | waterHeating | "gas" | |
| Heater | |||
| SI.Power | P_el_n | 3e3 | Nominal electric power of the electric heater |
| SI.Efficiency | eta_Heater | 0.95 | Efficiency of the electric heater |
| Storage | |||
| SI.Temperature | T_s_max | 323.15 | Maximum storage temperature |
| SI.Temperature | T_s_min | 303.15 | Minimum storage temperature |
| SI.Temperature | T_start | 60 + 273.15 | Start value of the storage temperature |
| SI.Volume | V_Storage | 0.2 | Volume of the Storage |
| SI.Height | height | 1.3 | Height of heat storage |
| SI.Diameter | d | sqrt(V_Storage/heatStorage.height*4/Modelica.Constants.pi) | Diameter of heat storage |
| Modelica.Units.NonSI.Temperature_degC | T_amb | 15 | Assumed constant ambient temperature |
| SI.SurfaceCoefficientOfHeatTransfer | k | 0.08 | Coefficient of heat transfer through tank surface |
| PV Parameters | |||
| SI.Power | P_inst | 5000 | combined installed power |
| SI.Power | Pmpp | 200 | peak power of one module |
| SI.Area | Area | 1.18 | area of one complete module |
| Real | Strings | 1 | choose amount of strings |
| Real | GroundCoverageRatio | 0.3 | ratio of covered ground of modules to area of modules |
| Real | LossesDC | 4.44 | losses in % through connections, wiring, tracking error and mismatches |
| SI.ActivePower | P_n | 5000 | Rated power of the inverter |
| SI.PowerFactor | cosphi | 1 | Operating power factor of the inverter |
| Real | Threshold | 0.7 | Percentage of peak power at which power is cut |
| Integer | behavior | -1 | |
| SI.Efficiency | eta_Inverter | 0.97 | Efficiency of the inverter |
| TransiEnt.Producer.Electrical.Photovoltaics.Advanced_PV.Characteristics.Generic_Characteristics_PVModule | PVModuleCharacteristics | TransiEnt.Producer.Electrical.Photovoltaics.Advanced_PV.Characteristics.PVModule_Characteristics_Sanyo_HIT_200_BA3() | Characteristics of PV Module |
| Radiation Parameters | |||
| Real | Soiling | 5 | Average annual losses of radiation in % due to soiling |
| Real | Albedo | 0.25 | Average annual losses of radiation in % due to soiling |
| SI.Angle | longitude_local | Modelica.Units.Conversions.from_deg(10) | Longitude of the local position, east positive, 10 East for Hamburg |
| SI.Angle | longitude_standard | Modelica.Units.Conversions.from_deg(15) | Needed for calculation of coordinated universal time (utc), 15 for central european time, 30 for central european summer time |
| Modelica.Units.NonSI.Time_day | totaldays | 365 | Total days of the year, standard=365, leap year=366 |
| SI.Angle | latitude | Modelica.Units.Conversions.from_deg(53.55) | Latitude of the local position, north posiive, 53,55 North for Hamburg |
| SI.Angle | Tilt | Modelica.Units.Conversions.from_deg(0) | Inclination of surface |
| SI.Angle | Azimuth | Modelica.Units.Conversions.from_deg(0) | Gyration of surface; Orientation: +90=West, -90=East, 0=South |
| 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 |
| Boiler | |||
| SI.Efficiency | eta_Boiler | 1.05 | Boiler's overall efficiency |
| SI.HeatFlowRate | Q_flow_n_Boiler | 20000 | Nominal heating power of the gas boiler |
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) |