modelSeriesVariableFlowAgentControl

Example of series connection with variable district water mass flow rate with updated agent controller

Extends from Buildings.DHC.Examples.Combined.BaseClasses.PartialSeries.

Information

This model is an updated version of Buildings.DHC.Examples.Combined.SeriesVariableFlow. In particular the following have been updated:

The sewage water temperature, mass flow rate and ground temperature are not constant and instead have a seasonal yearly profile.
The distribution network pripes now use the plug-flow model to add transport delay and ground coupling to the distribution network.
The borefield and sewagre heat exchanger circulation pumps are controlled by an agent specific controller Buildings.DHC.Networks.Controls.AgentPump1Pipe.

Ettore Zanetti, David Blum, Michael Wetter (2023) Control development and sizing analysis for a 5th generation district heating and cooling network using Modelica, In Proceedings of the 15th International Modelica Conference. Aachen, Germany, Oct 9-11, 2023.

Type	Name	Default	Description
String[nBui]	filNam	{"modelica://Buildings/Resources/Data/DHC/Loads/Examples/SwissOffice_20190916.mos", "modelica://Buildings/Resources/Data/DHC/Loads/Examples/SwissResidential_20190916.mos", "modelica://Buildings/Resources/Data/DHC/Loads/Examples/SwissHospital_20190916.mos"}	Library paths of the files with thermal loads as time series
Modelica.Units.SI.Length	diameter	sqrt(4*datDes.mPipDis_flow_nominal/1000/1.5/Modelica.Constants.pi)	Pipe diameter (without insulation)
Modelica.Units.SI.Height	lDisPip	200	Distribution pipes length
Modelica.Units.SI.Radius	rPip	diameter/2	Pipe external radius
Modelica.Units.SI.Radius	thiGroLay	0.5	Dynamic ground layer thickness

Type	Name	Description
Modelica.Blocks.Sources.Constant	masFloDisPla	District water flow rate to plant
Buildings.Controls.OBC.CDL.Reals.Sources.Constant[nBui]	THotWatSupSet	Hot water supply temperature set point
Buildings.Controls.OBC.CDL.Reals.Sources.Constant[nBui]	TColWat	Cold water temperature
Buildings.DHC.Networks.Controls.MainPump1Pipe	conPum	Main pump controller
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	gai	Scale with nominal mass flow rate
Modelica.Blocks.Sources.CombiTimeTable	HXtemperature
Modelica.Blocks.Math.Product	product1
.Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	gai1	Scale with nominal mass flow rate
Fluid.Sensors.TemperatureTwoPort	TDisWatSup1	District water supply temperature
Fluid.Sensors.TemperatureTwoPort	TDisWatRet1	District water return temperature
Fluid.FixedResistances.BuriedPipes.PipeGroundCoupling[nBui + 3]	pipeGroundCouplingMulti
Buildings.DHC.Networks.Controls.AgentPump1Pipe	pumPlantControlNsew
Buildings.DHC.Networks.Controls.AgentPump1Pipe	pumPlantControlNsewSto
Networks.Distribution1PipePlugFlow_v	dis
Fluid.FixedResistances.PlugFlowPipe	supDisPluFlo
Fluid.FixedResistances.PlugFlowPipe	retDisPluFlo