Buildings.Experimental.DHC.EnergyTransferStations.Combined.Examples

Example models integrating multiple components

Information

This package contains advanced examples illustrating the use of the models in Buildings.Experimental.DHC.EnergyTransferStations.Combined.

Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).

Package Content

Name	Description
ChillerBorefield	Example of the ETS model with heat recovery chiller and borefield
ChillerOnly	Example of the ETS model with heat recovery chiller

Buildings.Experimental.DHC.EnergyTransferStations.Combined.Examples.ChillerBorefield

Example of the ETS model with heat recovery chiller and borefield

Buildings.Experimental.DHC.EnergyTransferStations.Combined.Examples.ChillerBorefield

Information

This model validates Buildings.Experimental.DHC.EnergyTransferStations.Combined.ChillerBorefield in a system configuration including a geothermal borefield. See Buildings.Experimental.DHC.EnergyTransferStations.Combined.Examples.ChillerOnly for the description of the main modeling assumptions.

Extends from ChillerOnly (Example of the ETS model with heat recovery chiller).

Parameters

Type	Name	Default	Description
MassFlowRate	mHeaWat_flow_nominal	0.9*datChi.mCon_flow_nominal	Nominal heating water mass flow rate [kg/s]
MassFlowRate	mChiWat_flow_nominal	0.9*datChi.mEva_flow_nominal	Nominal chilled water mass flow rate [kg/s]
Generic	datChi		Chiller performance data
String	filNam	"modelica://Buildings/Resour...	File name with thermal loads as time series
Integer	nBorHol	64	Number of boreholes (must be a square number)
Distance	dxy	6	Distance in x-axis (and y-axis) between borehole axes [m]
Example	datBorFie	datBorFie(conDat=Fluid.Geoth...	Borefield design data
Design parameter
HeatFlowRate	QCoo_flow_nominal	Buildings.Experimental.DHC.L...	Design cooling heat flow rate (<=0) [W]
HeatFlowRate	QHea_flow_nominal	Buildings.Experimental.DHC.L...	Design heating heat flow rate (>=0) [W]

Modelica definition

model ChillerBorefield "Example of the ETS model with heat recovery chiller and borefield" extends ChillerOnly( ets( have_borFie=true, datBorFie=datBorFie)); parameter Integer nBorHol=64 "Number of boreholes (must be a square number)"; parameter Modelica.Units.SI.Distance dxy=6 "Distance in x-axis (and y-axis) between borehole axes"; final parameter Modelica.Units.SI.Distance cooBor[nBorHol,2]= Buildings.Experimental.DHC.EnergyTransferStations.BaseClasses.computeCoordinates(nBorHol, dxy) "Coordinates of boreholes"; parameter Fluid.Geothermal.Borefields.Data.Borefield.Example datBorFie( conDat=Fluid.Geothermal.Borefields.Data.Configuration.Example( cooBor=cooBor, dp_nominal=0)) "Borefield design data"; end ChillerBorefield;

Buildings.Experimental.DHC.EnergyTransferStations.Combined.Examples.ChillerOnly

Example of the ETS model with heat recovery chiller

Buildings.Experimental.DHC.EnergyTransferStations.Combined.Examples.ChillerOnly

Information

This model validates Buildings.Experimental.DHC.EnergyTransferStations.Combined.ChillerBorefield in a system configuration with no geothermal borefield.

A load profile based on a whole building energy simulation is used to represent realistic operating conditions.
The district water supply temperature varies on a monthly basis, with a minimum in January and a maximum in August.
The other modeling assumptions are described in Buildings.Experimental.DHC.EnergyTransferStations.Combined.Validation.BaseClasses.PartialChillerBorefield.

Extends from Buildings.Experimental.DHC.EnergyTransferStations.Combined.Validation.BaseClasses.PartialChillerBorefield (Partial validation of the ETS model with heat recovery chiller and optional borefield).

Parameters

Type	Name	Default	Description
MassFlowRate	mHeaWat_flow_nominal	0.9*datChi.mCon_flow_nominal	Nominal heating water mass flow rate [kg/s]
MassFlowRate	mChiWat_flow_nominal	0.9*datChi.mEva_flow_nominal	Nominal chilled water mass flow rate [kg/s]
Generic	datChi		Chiller performance data
String	filNam	"modelica://Buildings/Resour...	File name with thermal loads as time series
Design parameter
HeatFlowRate	QCoo_flow_nominal	Buildings.Experimental.DHC.L...	Design cooling heat flow rate (<=0) [W]
HeatFlowRate	QHea_flow_nominal	Buildings.Experimental.DHC.L...	Design heating heat flow rate (>=0) [W]

Modelica definition

model ChillerOnly "Example of the ETS model with heat recovery chiller" extends Buildings.Experimental.DHC.EnergyTransferStations.Combined.Validation.BaseClasses.PartialChillerBorefield ( TDisWatSup( table=[ 0,11; 1,12; 2,13; 3,14; 4,15; 5,16; 6,17; 7,18; 8,20; 9,18; 10,16; 11,13; 12,11], timeScale=2592000), loa( tableOnFile=true, fileName=Modelica.Utilities.Files.loadResource( filNam), timeScale=1), QCoo_flow_nominal=Buildings.Experimental.DHC.Loads.BaseClasses.getPeakLoad( string="#Peak space cooling load", filNam=Modelica.Utilities.Files.loadResource(filNam)), QHea_flow_nominal=Buildings.Experimental.DHC.Loads.BaseClasses.getPeakLoad( string="#Peak space heating load", filNam=Modelica.Utilities.Files.loadResource(filNam))); parameter String filNam="modelica://Buildings/Resources/Data/Experimental/DHC/Loads/Examples/MediumOffice-90.1-2010-5A.mos" "File name with thermal loads as time series"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter loaNorHea( final k=1/ets.QHeaWat_flow_nominal) "Normalize by nominal"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter loaNorCoo( final k=1/ets.QChiWat_flow_nominal) "Normalize by nominal"; equation connect(loa.y[2],loaNorHea.u); connect(loa.y[1],loaNorCoo.u); connect(loaNorHea.y,heaLoaNor.u); connect(loaNorCoo.y,loaCooNor.u); connect(TDisWatSup.y[1],disWat.T_in); end ChillerOnly;