Buildings.DHC.Networks.Connections.Examples
This package contains example models
Information
This package contains an example illustrating the use of the model in Buildings.DHC.Loads.Combined.
Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
Package Content
| Name | Description |
|---|---|
 Connection1PipeExample
|
Example model that showcases Connection1Pipe_R and Connection1PipePlugFlow_v models |
| Connection2PipeExample
|
Example model that showcases Connection2Pipe_R and Connection2PipePlugFlow_v models |
Buildings.DHC.Networks.Connections.Examples.Connection1PipeExample
Example model that showcases Connection1Pipe_R and Connection1PipePlugFlow_v models
Information
Example model of two one-pipe connection models that could be used i.e for building a reservoir network to connect one agent in series. It uses Buildings.DHC.Networks.Connections.Connection1Pipe_R and Buildings.DHC.Networks.Connections.Connection1PipePlugFlow_v. The agent, in this example just a pump, will draw water from the distribution pipe and release it to the same pipe.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Length | dh | Hydraulic diameter (assuming a round cross section area) [m] | |
| MassFlowRate | mDis_flow_nominal | 1 | Nominal mass flow rate in the distribution line [kg/s] |
| MassFlowRate | mCon_flow_nominal | 0.5 | Nominal mass flow rate in the connection line [kg/s] |
| Length | lDis | 100 | Length of the distribution pipe before the connection [m] |
Modelica definition
model Connection1PipeExample
"Example model that showcases Connection1Pipe_R and Connection1PipePlugFlow_v models"
extends Modelica.Icons.Example;
package MediumW = Buildings.Media.Water "Medium model";
parameter Modelica.Units.SI.Length dh(
fixed=false,
start=0.01,
min=0.001) "Hydraulic diameter (assuming a round cross section area)";
parameter Modelica.Units.SI.MassFlowRate mDis_flow_nominal = 1
"Nominal mass flow rate in the distribution line";
parameter Modelica.Units.SI.MassFlowRate mCon_flow_nominal = 0.5
"Nominal mass flow rate in the connection line";
parameter Modelica.Units.SI.Length lDis = 100
"Length of the distribution pipe before the connection";
Buildings.DHC.Networks.Connections.Connection1Pipe_R connection1Pipe_R(
redeclare package Medium = MediumW,
mDis_flow_nominal=mDis_flow_nominal,
mCon_flow_nominal=mCon_flow_nominal,
lDis=lDis,
dhDis=dh);
Buildings.Fluid.Sources.Boundary_pT bouDisAutoSize(
redeclare final package Medium = MediumW,
p=300000,
nPorts=1);
Modelica.Blocks.Sources.Constant mDis_flow_nominal_exp(k=mDis_flow_nominal);
Buildings.DHC.ETS.BaseClasses.Pump_m_flow pumDisPipe_R(
dp_nominal=100000,
redeclare final package Medium = MediumW,
m_flow_nominal=mDis_flow_nominal) "Distribution network pump";
Buildings.DHC.ETS.BaseClasses.Pump_m_flow pumConPipe_R(
dp_nominal=5000,
redeclare final package Medium = MediumW,
m_flow_nominal=mDis_flow_nominal) "Agent connection pump";
Buildings.DHC.Networks.Connections.Connection1PipePlugFlow_v
connection1PipeplugFlow(
redeclare package Medium = MediumW,
mDis_flow_nominal=mDis_flow_nominal,
mCon_flow_nominal=mCon_flow_nominal,
dIns=0.001,
kIns=1,
lDis=lDis);
Buildings.Fluid.Sources.Boundary_pT bouDisPlugFlow(
redeclare final package Medium = MediumW,
p=300000,
nPorts=1);
Buildings.DHC.ETS.BaseClasses.Pump_m_flow pumDisPlugFlow(
dp_nominal=100000,
redeclare final package Medium = MediumW,
m_flow_nominal = mDis_flow_nominal) "Distribution network pump";
Buildings.DHC.ETS.BaseClasses.Pump_m_flow pumConPlugFlow(
dp_nominal=5000,
redeclare final package Medium = MediumW,
m_flow_nominal=mDis_flow_nominal) "Agent connection pump";
Fluid.FixedResistances.BuriedPipes.PipeGroundCoupling pipeGroundCoupling(
lPip=lDis,
rPip=0.04,
thiGroLay=1.1,
nSta=5,
nSeg=1);
Modelica.Blocks.Sources.Step mCon_flow_nominal_exp(height=mCon_flow_nominal,
startTime=1800);
equation
connect(pumDisPipe_R.port_b, connection1Pipe_R.port_aDis);
connect(bouDisAutoSize.ports[1], connection1Pipe_R.port_aDis);
connect(pumDisPipe_R.port_a, connection1Pipe_R.port_bDis);
connect(mDis_flow_nominal_exp.y, pumDisPipe_R.m_flow_in);
connect(connection1Pipe_R.port_bCon, pumConPipe_R.port_a);
connect(pumConPipe_R.port_b, connection1Pipe_R.port_aCon);
connect(pumDisPlugFlow.port_b, connection1PipeplugFlow.port_aDis);
connect(bouDisPlugFlow.ports[1], connection1PipeplugFlow.port_aDis);
connect(pumDisPlugFlow.port_a, connection1PipeplugFlow.port_bDis);
connect(mDis_flow_nominal_exp.y, pumDisPlugFlow.m_flow_in);
connect(connection1PipeplugFlow.port_bCon, pumConPlugFlow.port_a);
connect(pumConPlugFlow.port_b, connection1PipeplugFlow.port_aCon);
connect(pipeGroundCoupling.heatPorts[1], connection1PipeplugFlow.heatPortDis);
connect(mCon_flow_nominal_exp.y, pumConPipe_R.m_flow_in);
connect(pumConPlugFlow.m_flow_in, pumConPipe_R.m_flow_in);
end Connection1PipeExample;
Buildings.DHC.Networks.Connections.Examples.Connection2PipeExample
Example model that showcases Connection2Pipe_R and Connection2PipePlugFlow_v models
Information
Example model of two two-pipe connection models that could be used i.e for building a bi-directional network to connect one agent in series. It uses Buildings.DHC.Networks.Connections.Connection2Pipe_R and Buildings.DHC.Networks.Connections.Connection2PipePlugFlow_v. The agent, in this example just a pump, will draw water from the distribution supply pipe and release it in the return pipe.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Length | dhDis | Hydraulic diameter (assuming a round cross section area) [m] | |
| Length | dhRet | Hydraulic diameter (assuming a round cross section area) [m] | |
| MassFlowRate | mDis_flow_nominal | 1 | Nominal mass flow rate in the distribution line [kg/s] |
| MassFlowRate | mCon_flow_nominal | 0.5 | Nominal mass flow rate in the connection line [kg/s] |
| Length | lDis | 100 | Length of the distribution pipe before the connection [m] |
Modelica definition
model Connection2PipeExample
"Example model that showcases Connection2Pipe_R and Connection2PipePlugFlow_v models"
extends Modelica.Icons.Example;
package MediumW = Buildings.Media.Water "Medium model";
parameter Modelica.Units.SI.Length dhDis(
fixed=false,
start=0.01,
min=0.001) "Hydraulic diameter (assuming a round cross section area)";
parameter Modelica.Units.SI.Length dhRet(
fixed=false,
start=0.01,
min=0.001) "Hydraulic diameter (assuming a round cross section area)";
parameter Modelica.Units.SI.MassFlowRate mDis_flow_nominal=1
"Nominal mass flow rate in the distribution line";
parameter Modelica.Units.SI.MassFlowRate mCon_flow_nominal=0.5
"Nominal mass flow rate in the connection line";
parameter Modelica.Units.SI.Length lDis=100
"Length of the distribution pipe before the connection";
Buildings.DHC.Networks.Connections.Connection2Pipe_R connection2Pipe_R(
redeclare package Medium = MediumW,
mDis_flow_nominal=mDis_flow_nominal,
mCon_flow_nominal=mCon_flow_nominal,
dhDisRet=dhRet,
lDis=lDis,
dhDis=dhDis);
Buildings.Fluid.Sources.Boundary_pT bouDisPipe_R(
redeclare final package Medium = MediumW,
p=300000,
nPorts=1);
Modelica.Blocks.Sources.Constant mDis_flow_nominal_exp(k=mDis_flow_nominal);
Buildings.DHC.ETS.BaseClasses.Pump_m_flow pumDisPipe_R(
dp_nominal=100000,
redeclare final package Medium = MediumW,
m_flow_nominal=mDis_flow_nominal) "Distribution network pump";
Buildings.DHC.ETS.BaseClasses.Pump_m_flow pumConPipe_R(
dp_nominal=5000,
redeclare final package Medium = MediumW,
m_flow_nominal=mDis_flow_nominal) "Agent connection pump";
Buildings.DHC.Networks.Connections.Connection2PipePlugFlow_v
connection2PipeplugFlow(
redeclare package Medium = MediumW,
mDis_flow_nominal=mDis_flow_nominal,
mCon_flow_nominal=mCon_flow_nominal,
dIns=0.001,
kIns=1,
lDis=lDis);
Buildings.Fluid.Sources.Boundary_pT bouDisPlugFlow(
redeclare final package Medium = MediumW,
p=300000,
nPorts=1);
Buildings.DHC.ETS.BaseClasses.Pump_m_flow pumDisPlugFlow(
dp_nominal=100000,
redeclare final package Medium = MediumW,
m_flow_nominal=mDis_flow_nominal) "Distribution network pump";
Buildings.DHC.ETS.BaseClasses.Pump_m_flow pumConPlugFlow(
dp_nominal=5000,
redeclare final package Medium = MediumW,
m_flow_nominal=mDis_flow_nominal) "Agent connection pump";
Fluid.FixedResistances.BuriedPipes.PipeGroundCoupling pipeGroundCoupling(
lPip=lDis,
rPip=0.04,
thiGroLay=1.1,
nSta=5,
nSeg=2);
Modelica.Blocks.Sources.Step mCon_flow_nominal_exp(height=mCon_flow_nominal,
startTime=1800);
Fluid.Sensors.MassFlowRate senMasFloDisAutosize(redeclare final package
Medium = MediumW) "Connection supply mass flow rate (measured)";
Fluid.Sensors.MassFlowRate senMasFloDisPlugFlow(redeclare final package
Medium = MediumW) "Connection supply mass flow rate (measured)";
equation
connect(mDis_flow_nominal_exp.y, pumDisPipe_R.m_flow_in);
connect(mDis_flow_nominal_exp.y, pumDisPlugFlow.m_flow_in);
connect(connection2PipeplugFlow.port_bCon, pumConPlugFlow.port_a);
connect(pumConPlugFlow.port_b,connection2PipeplugFlow. port_aCon);
connect(pipeGroundCoupling.heatPorts[1],connection2PipeplugFlow. heatPortDis);
connect(mCon_flow_nominal_exp.y, pumConPipe_R.m_flow_in);
connect(pumConPlugFlow.m_flow_in, pumConPipe_R.m_flow_in);
connect(pumDisPipe_R.port_a, connection2Pipe_R.port_bDisRet);
connect(pumDisPlugFlow.port_a,connection2PipeplugFlow. port_bDisRet);
connect(connection2PipeplugFlow.heatPortRet, pipeGroundCoupling.heatPorts[2]);
connect(pumDisPlugFlow.port_b, connection2PipeplugFlow.port_aDisSup);
connect(pumDisPipe_R.port_b, connection2Pipe_R.port_aDisSup);
connect(connection2Pipe_R.port_bCon, pumConPipe_R.port_a);
connect(pumConPipe_R.port_b, connection2Pipe_R.port_aCon);
connect(connection2Pipe_R.port_bDisSup, senMasFloDisAutosize.port_a);
connect(senMasFloDisAutosize.port_b, connection2Pipe_R.port_aDisRet);
connect(connection2PipeplugFlow.port_bDisSup, senMasFloDisPlugFlow.port_a);
connect(senMasFloDisPlugFlow.port_b, connection2PipeplugFlow.port_aDisRet);
connect(bouDisPlugFlow.ports[1], connection2PipeplugFlow.port_aDisSup);
connect(bouDisPipe_R.ports[1], connection2Pipe_R.port_aDisSup);
end Connection2PipeExample;