modelLargeScaleWaterToWater_OneRoomRadiator

Large scale water to water heat pump connected to a simple room model with radiator
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Extends from Modelica.Icons.Example (Icon for runnable examples), BaseClasses.PartialOneRoomRadiator (Simple room model with radiator, without a heat pump).

Information

This example demonstrates how to use the BuildingSystems.Fluid.HeatPumps.ModularReversible.LargeScaleWaterToWater heat pump model. Please check the associated documentation for further information.

Contrary to the other models, parameters for heat exchanger inertia (tau) and mass flow rates are calculated automatically based on the heat demand.

Furthermore, this example demonstrates the warnings which are raised if the table data boundary conditions (e.g. mEva_flow_nominal) deviates from the parameter in use.

To fix this issue, the user has to either

  1. Check the assumption of using a different mass flow rate, or
  2. adjust the mass flow rates in the hydraulic system. If the deviation is too big, the system would also not work in reality.

Please check the documentation of BuildingSystems.Fluid.HeatPumps.ModularReversible.Examples.BaseClasses.PartialOneRoomRadiator for further information on the example.

Parameters

TypeNameDefaultDescription
Modelica.Units.SI.HeatFlowRateQ_flow_nominal (from PartialOneRoomRadiator)20000Nominal heat flow rate of radiator
Modelica.Units.SI.TemperatureTRadSup_nominal (from PartialOneRoomRadiator)273.15 + 50Radiator nominal supply water temperature
Modelica.Units.SI.TemperatureTRadRet_nominal (from PartialOneRoomRadiator)273.15 + 45Radiator nominal return water temperature
Modelica.Units.SI.MassFlowRatemCon_flow_nominal (from PartialOneRoomRadiator)Q_flow_nominal/4200/5Heat pump nominal mass flow rate in condenser
Modelica.Units.SI.MassFlowRatemEva_flow_nominal (from PartialOneRoomRadiator)Heat pump nominal mass flow rate in evaporator
Modelica.Units.SI.VolumeV (from PartialOneRoomRadiator)6*10*3Room volume
Modelica.Units.SI.MassFlowRatemAirRoo_flow_nominal (from PartialOneRoomRadiator)V*1.2*6/3600Nominal mass flow rate of room air
Modelica.Units.SI.HeatFlowRateQRooInt_flow (from PartialOneRoomRadiator)Q_flow_nominal/5Internal heat gains of the room
BooleanwitCoo (from PartialOneRoomRadiator)true=true to simulate cooling behaviour

Connectors

TypeNameDefaultDescription
BuildingSystems.BoundaryConditions.WeatherData.BusweaBus (from PartialOneRoomRadiator)Weather data bus

Components

TypeNameDefaultDescription
BuildingSystems.Fluid.MixingVolumes.MixingVolumevol (from PartialOneRoomRadiator)
Modelica.Thermal.HeatTransfer.Components.ThermalConductortheCon (from PartialOneRoomRadiator)Thermal conductance with the ambient
Modelica.Thermal.HeatTransfer.Sources.PrescribedHeatFlowpreHea (from PartialOneRoomRadiator)Prescribed heat flow
Modelica.Thermal.HeatTransfer.Components.HeatCapacitorheaCap (from PartialOneRoomRadiator)Heat capacity for furniture and walls
Modelica.Blocks.Sources.CombiTimeTabletimTab (from PartialOneRoomRadiator)Time table for internal heat gain
BuildingSystems.Fluid.HeatExchangers.Radiators.RadiatorEN442_2rad (from PartialOneRoomRadiator)Radiator
BuildingSystems.Fluid.Sensors.TemperatureTwoPorttemSup (from PartialOneRoomRadiator)Supply water temperature
Modelica.Thermal.HeatTransfer.Sensors.TemperatureSensortemRoo (from PartialOneRoomRadiator)Room temperature
Movers.FlowControlled_m_flowpumHeaPum (from PartialOneRoomRadiator)Pump for radiator side
BuildingSystems.Fluid.Sensors.TemperatureTwoPorttemRet (from PartialOneRoomRadiator)Return water temperature
BuildingSystems.BoundaryConditions.WeatherData.ReaderTMY3weaDat (from PartialOneRoomRadiator)Weather data reader
Modelica.Thermal.HeatTransfer.Sources.PrescribedTemperatureTOut (from PartialOneRoomRadiator)Outside temperature
Movers.FlowControlled_m_flowpumHeaPumSou (from PartialOneRoomRadiator)Pump for heat pump source side
Modelica.Blocks.Math.BooleanToRealbooToReaPumCon (from PartialOneRoomRadiator)Pump signal
BuildingSystems.Fluid.Sources.Boundary_pTsou (from PartialOneRoomRadiator)Fluid source on source side
BuildingSystems.Fluid.Sources.Boundary_pTsin (from PartialOneRoomRadiator)Fluid sink on source side
BuildingSystems.Fluid.Sources.Boundary_pTpreSou (from PartialOneRoomRadiator)Source for pressure and to account for thermal expansion of water
Modelica.Blocks.Math.BooleanToRealbooToReaPumEva (from PartialOneRoomRadiator)Pump signal
Modelica.Thermal.HeatTransfer.Sources.PrescribedHeatFlowpreHeaCoo (from PartialOneRoomRadiator)Prescribed heat flow to trigger cooling
Modelica.Blocks.Sources.PulsecooLoa (from PartialOneRoomRadiator)Cooling load with step
BuildingSystems.Fluid.HeatPumps.ModularReversible.Examples.BaseClasses.OneRoomRadiatorHeatPumpControloneRooRadHeaPumCtr (from PartialOneRoomRadiator)Control block for single room heat pump control
Modelica.Blocks.Sources.BooleanConstantconPumAlwOn (from PartialOneRoomRadiator)Let the pumps always run, due to inertia of the heat pump
BuildingSystems.Fluid.HeatPumps.ModularReversible.LargeScaleWaterToWaterheaPumLarge scale water to water heat pump

Revisions

  • October 2, 2022 by Fabian Wuellhorst:
    First implementation (see issue #1576)