Buildings.DHC.ETS.Combined.Examples
Example models integrating multiple components
Information
This package contains advanced examples illustrating the use of the models in Buildings.DHC.ETS.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.DHC.ETS.Combined.Examples.ChillerBorefield
Example of the ETS model with heat recovery chiller and borefield
Information
This model validates Buildings.DHC.ETS.Combined.ChillerBorefield in a system configuration including a geothermal borefield. See Buildings.DHC.ETS.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.DHC.Loads.BaseClas... | Design cooling heat flow rate (<=0) [W] |
| HeatFlowRate | QHea_flow_nominal | Buildings.DHC.Loads.BaseClas... | 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.DHC.ETS.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.DHC.ETS.Combined.Examples.ChillerOnly
Example of the ETS model with heat recovery chiller
Information
This model validates Buildings.DHC.ETS.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.DHC.ETS.Combined.Validation.BaseClasses.PartialChillerBorefield.
Extends from Buildings.DHC.ETS.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.DHC.Loads.BaseClas... | Design cooling heat flow rate (<=0) [W] |
| HeatFlowRate | QHea_flow_nominal | Buildings.DHC.Loads.BaseClas... | Design heating heat flow rate (>=0) [W] |
Modelica definition
model ChillerOnly
"Example of the ETS model with heat recovery chiller"
extends Buildings.DHC.ETS.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.DHC.Loads.BaseClasses.getPeakLoad(
string="#Peak space cooling load",
filNam=Modelica.Utilities.Files.loadResource(filNam)),
QHea_flow_nominal=Buildings.DHC.Loads.BaseClasses.getPeakLoad(
string="#Peak space heating load",
filNam=Modelica.Utilities.Files.loadResource(filNam)));
parameter String filNam="modelica://Buildings/Resources/Data/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;