modelPV_HeatPump
Extends from Base.Systems.
Information
1. Purpose of model
Combination of PV, heatpump, 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 a heat pump, an electric heater, a thermal storage tank, a PV module, an inverter and a controller for the operation of the heat pump and the electrical heater. 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 | hotwater | true | Does the heat pump provide energy for the hot water? (if false: water is heated electrically) |
| Boolean | heating | true | Does the heat pump provide energy for the space heating? (if false: space heating not accounted for) |
| Heatpump | |||
| SI.TemperatureDifference | Delta_T_internal | 5 | Temperature difference between refrigerant and source/sink temperature |
| SI.TemperatureDifference | Delta_T_db | 2 | Deadband of hysteresis control |
| SI.HeatFlowRate | Q_flow_n | 3.5e3 | Nominal heat flow of heat pump at nominal conditions according to EN14511 |
| Real | COP_n | 3.7 | Coefficient of performance at nominal conditions according to EN14511 |
| SI.Power | P_el_n | 10e3 | Nominal electric power of the backup heater |
| SI.Efficiency | eta_Heater | 0.95 | Efficiency of the backup heater |
| SI.Temperature | T_set | 65 + 273.25 | Heatpump supply temperature |
| Storage | |||
| SI.Temperature | T_s_max | 343.15 | Maximum storage temperature |
| SI.Temperature | T_s_min | 323.15 | Minimum storage temperature |
| SI.Temperature | T_start | 60 + 273.15 | Start value of the storage temperature |
| SI.Volume | V_Storage | 0.5 | Volume of the 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 |
| 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 |
| 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 |
| 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 |
| 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 |
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) |