modelBivalentHeatPumpWithControl
Extends from TransiEnt.Basics.Icons.HeatPump.
Information
1. Purpose of model
Combination of heatpump model with controller model and heater for bivalent operation.
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
T/SoC as input for the controlled variable
T_set for the setpoint of the controlled variable
Powerport epp
Fluidports inlet/outlet or heatport
5. Nomenclature
(no elements)
6. Governing Equations
(no equations)
7. Remarks for Usage
8. Validation
(no validation or testing necessary)
9. References
(no remarks)
10. Version History
Model from TransiEnt 1.1.0 modified by Anne Hagemeier (anne.hagemeier@umsicht.fraunhofer.de), Nov 2019
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Power | P_el_n | Q_flow_n/COP_n | Nominal electric power of Heatpump |
| Control | |||
| Boolean | control_SoC | false | Choose controlled variable, 'true'=SoC, 'false'=Storage temperature |
| Boolean | Modulating | true | True: modulating heat pump operation, false: static operation with P_n |
| Boolean | T_External | true | True: Actual temperature is read externally into the model. False: Temperature from fluid port is used. |
| Boolean | MinTimes | true | If true, minimum operation and shutoff times are considered |
| Boolean | CalculatePHeater | false | If true, electrical heater power output is calculated for bivalent heat pump operation |
| SI.TemperatureDifference | Delta_T_db | 2 | Deadband of hysteresis control |
| Basics.Types.OnOffRelaisStatus | init_state | TransiEnt.Basics.Types.on_ready | State of relais at initialization |
| SI.Time | t_min_on | 3600 | Minimum on time |
| SI.Time | t_min_off | 600 | Minimum off time |
| Heatpump | |||
| Boolean | usePowerPort | true | True if power port shall be used |
| Boolean | useFluidPorts | true | True if fluid ports shall be used |
| Boolean | useHeatPort | false | True if heat port shall be used |
| Boolean | use_T_source_input_K | false | False, use outer ambient conditions |
| SI.TemperatureDifference | Delta_T_internal | 5 | Temperature difference between refrigerant and source/sink temperature |
| 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 |
| TILMedia.VLEFluidTypes.BaseVLEFluid | medium | heatPump.simCenter.fluid1 | Medium to be used |
| SI.Pressure | p_drop | heatPump.simCenter.p_nom[2] - heatPump.simCenter.p_nom[1] | |
| Heater | |||
| SI.Power | P_el_n_heater | 10e3 | Nominal electric power of the backup heater |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_b | heatPort | ||
| Basics.Interfaces.Thermal.HeatFlowRateOut | Heat_output | Setpoint value, e.g. Storage setpoint temperature | |
| Basics.Interfaces.Thermal.FluidPortOut | outlet | ||
| Basics.Interfaces.Thermal.FluidPortIn | inlet | ||
| Basics.Interfaces.General.TemperatureIn | T_set | Setpoint value, e.g. Storage setpoint temperature | |
| PowerPortModel | epp | ||
| Basics.Interfaces.General.TemperatureIn | T | ||
| Modelica.Blocks.Interfaces.RealInput | SoC | ||
| TransiEnt.Basics.Interfaces.General.TemperatureIn | T_source_input_K | Input ambient temperature in Kelvin |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.SimCenter | simCenter | ||
| Modelica.Units.SI.Temperature | T_source | simCenter.ambientConditions.temperature.value + 273.15 | Temperature of heat source |
| Modelica.Blocks.Sources.RealExpression | COP | ||
| Heatpump | heatPump | ||
| TransiEnt.Producer.Heat.Power2Heat.Heatpump.Controller.ControlHeatpump_heatdriven_BVTemp | controller | ||
| ElectricBoiler.ElectricBoiler | electricBoiler | ||
| ClaRa.Components.Sensors.SensorVLE_L1_T | T_out | ||
| Modelica.Blocks.Math.Add | add |
Contents
| Name | Description |
|---|---|
 PowerPortModel | |
 PowerBoundaryModel | |
 heatFlowBoundaryModel |