Buildings.Fluid.Geothermal.Boreholes.Examples
Example files for borehole heat exchanger
Information
Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
Package Content
| Name | Description |
|---|---|
 UTube
|
Model that tests the borehole model |
Buildings.Fluid.Geothermal.Boreholes.Examples.UTube
Model that tests the borehole model
Information
This example models a borehole heat exchanger with two pipes that are symmetrically spaced. The simulation period is 5 years. From the 4th to the 10th months, the mass flow source switches on the flow rate through the borehole. The leaving water of the mass flow source is 25°C, and the water that returns from the borehole is between 20.5°C and 21.5°C.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Modelica definition
model UTube "Model that tests the borehole model"
extends Modelica.Icons.Example;
package Medium = Buildings.Media.Water;
Buildings.Fluid.Geothermal.Boreholes.UTube borHol(
redeclare package Medium = Medium,
hBor=150,
dp_nominal=10000,
dT_dz=0.0015,
samplePeriod=604800,
m_flow_nominal=0.3,
redeclare parameter Buildings.HeatTransfer.Data.BoreholeFillings.Bentonite
matFil,
redeclare parameter Buildings.HeatTransfer.Data.Soil.Sandstone matSoi,
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
TExt0_start=283.15,
TFil0_start=283.15) "Borehole heat exchanger";
Sources.Boundary_ph sin(
redeclare package Medium = Medium,
nPorts=1) "Sink";
Sources.MassFlowSource_T sou(
redeclare package Medium = Medium,
nPorts=1,
use_m_flow_in=true,
T=298.15) "Source";
Modelica.Blocks.Sources.Pulse pulse(
amplitude=0.3,
period=365*86400,
startTime=365*86400/4);
equation
connect(sou.ports[1], borHol.port_a);
connect(borHol.port_b, sin.ports[1]);
connect(pulse.y, sou.m_flow_in);
end UTube;