Buildings.Fluid.SolarCollectors.Validation
Collection of validation models
Information
This package contains validation models for the classes in Buildings.Fluid.SolarCollectors.
Note that most validation models contain simple input data which may not be realistic, but for which the correct output can be obtained through an analytic solution. The examples plot various outputs, which have been verified against these solutions. These model outputs are stored as reference data and used for continuous validation whenever models in the library change.
Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
Package Content
| Name | Description |
|---|---|
 EN12975NPanels
|
Validation model for collector according to EN12975 with different settings for nPanel |
| EN12975_Series
|
Validation model for collector according to EN12975 with different panels in series |
| ExtremeAmbientConditions
|
Validation model for to ensure that collectors do not freeze or boil |
| FlatPlate
|
Validation model for FlatPlate |
| FlatPlateNPanels
|
Validation model for flat plate collector with different settings for nPanel |
Buildings.Fluid.SolarCollectors.Validation.EN12975NPanels
Validation model for collector according to EN12975 with different settings for nPanel
Information
This model validates the solar collector model
Buildings.Fluid.SolarCollectors.EN12975
for the case
where the number of panels is 1 for the instance solCol
and 10 for the instance solCol1.
The instances difHeaGai and difHeaLos
compare the heat gain and heat loss between the two models.
The output of these blocks should be zero, except for rounding errors.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | Buildings.Media.Water | Medium in the system | |
| Integer | nPanels | 10 | Number of panels |
| C_VerificationModel | datSolCol | ||
Connectors
| Type | Name | Description |
|---|---|---|
| replaceable package Medium | Medium in the system | |
Modelica definition
model EN12975NPanels
"Validation model for collector according to EN12975 with different settings for nPanel"
extends Modelica.Icons.Example;
replaceable package Medium = Buildings.Media.Water "Medium in the system";
parameter Integer nPanels=10 "Number of panels";
Buildings.Fluid.SolarCollectors.EN12975 solCol(
redeclare package Medium = Medium,
per=datSolCol,
shaCoe=0,
azi=0,
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
rho=0.2,
nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
nPanels=1,
nSeg=30,
til=0.78539816339745)
"Flat plate solar collector model, has been modified for validation purposes";
Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat(filNam=
Modelica.Utilities.Files.loadResource("modelica://Buildings/Resources/weatherdata/USA_CA_San.Francisco.Intl.AP.724940_TMY3.mos"),
computeWetBulbTemperature=false)
"Weather data file reader";
Buildings.Fluid.Sources.Boundary_pT sou(
redeclare package Medium = Medium,
use_p_in=false,
p(displayUnit="Pa") = 101325,
nPorts=1) "Outlet for water flow";
Buildings.Fluid.Sources.MassFlowSource_T bou(
nPorts=1,
redeclare package Medium = Medium,
use_m_flow_in=true,
use_T_in=false,
T=303.15) "Inlet for water flow, at a prescribed flow rate and temperature";
Buildings.Fluid.SolarCollectors.EN12975 solCol1(
redeclare package Medium = Medium,
per=datSolCol,
shaCoe=0,
azi=0,
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
rho=0.2,
nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
nSeg=30,
til=0.78539816339745,
nPanels=nPanels)
"Flat plate solar collector model, has been modified for validation purposes";
Buildings.Fluid.Sources.Boundary_pT sou1(
redeclare package Medium = Medium,
use_p_in=false,
p(displayUnit="Pa") = 101325,
nPorts=1) "Outlet for water flow";
Buildings.Fluid.Sources.MassFlowSource_T bou1(
nPorts=1,
redeclare package Medium = Medium,
use_m_flow_in=true,
use_T_in=false,
T=303.15) "Inlet for water flow, at a prescribed flow rate and temperature";
Modelica.Blocks.Math.Gain gaiNPan(k=nPanels) "Gain for number of panels";
Modelica.Blocks.Sources.RealExpression difHeaGai(y=solCol.heaGai[30].Q_flow
- solCol1.heaGai[30].Q_flow/nPanels)
"Difference in heat gain at last panel between model with 1 and with 30 panels";
Modelica.Blocks.Sources.RealExpression difHeaLos(y=solCol.QLos[30].Q_flow -
solCol1.QLos[30].Q_flow/nPanels)
"Difference in heat loss at last panel between model with 1 and with 30 panels";
Modelica.Blocks.Sources.Constant m_flow_nominal(k=datSolCol.A*datSolCol.mperA_flow_nominal)
"Nominal flow rate for one panel";
parameter Data.Concentrating.C_VerificationModel datSolCol;
equation
connect(weaDat.weaBus, solCol1.weaBus);
connect(bou1.ports[1], solCol1.port_a);
connect(sou1.ports[1], solCol1.port_b);
connect(gaiNPan.y, bou1.m_flow_in);
connect(solCol.port_a, bou.ports[1]);
connect(solCol.port_b, sou.ports[1]);
connect(solCol.weaBus, weaDat.weaBus);
connect(m_flow_nominal.y, bou.m_flow_in);
connect(gaiNPan.u, m_flow_nominal.y);
end EN12975NPanels;
Buildings.Fluid.SolarCollectors.Validation.EN12975_Series
Validation model for collector according to EN12975 with different panels in series
Information
This model validates the solar collector model
Buildings.Fluid.SolarCollectors.EN12975
for the case where one model has multiple panels in series,
versus the case where two models are in series, each having one panel.
The output of the block dT must be zero, as both
cases must have the same outlet temperatures.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | Buildings.Media.Water | Medium in the system | |
| MassFlowRate | m_flow_nominal | solCol.datSolCol.A*solCol.da... | Nominal mass flow rate [kg/s] |
Connectors
| Type | Name | Description |
|---|---|---|
| replaceable package Medium | Medium in the system | |
Modelica definition
model EN12975_Series
"Validation model for collector according to EN12975 with different panels in series"
extends Modelica.Icons.Example;
replaceable package Medium = Buildings.Media.Water "Medium in the system";
parameter Modelica.Units.SI.MassFlowRate m_flow_nominal=solCol.datSolCol.A*
solCol.datSolCol.mperA_flow_nominal "Nominal mass flow rate";
model collector
extends Buildings.Fluid.SolarCollectors.EN12975(
redeclare final package Medium = Buildings.Media.Water,
final show_T = true,
final per=datSolCol,
final shaCoe=0,
final azi=0,
final energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
final rho=0.2,
final nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
nPanels=1,
final til=0.78539816339745,
final C=385*perPar.mDry,
final use_shaCoe_in=false,
final sysConfig=Buildings.Fluid.SolarCollectors.Types.SystemConfiguration.Series);
parameter SolarCollectors.Data.GenericSolarCollector datSolCol(
final ATyp=Types.Area.Aperture,
A=4.302,
V=4.4/1000,
final dp_nominal = 100,
final mperA_flow_nominal=0.0241,
final y_intercept=0.720,
final IAMDiff=0.133,
final C1=2.8312,
final C2=0.00119,
final B0=0,
final B1=0,
mDry=484,
final slope=0,
final G_nominal = 1000,
final dT_nominal = 20) "Performance data";
end collector;
collector solCol(
nPanels=2,
nSeg=6)
"Flat plate solar collector model, has been modified for validation purposes";
collector solCol1(
nSeg=3,
nPanels=1)
"Flat plate solar collector model, has been modified for validation purposes";
collector solCol2(
nSeg=3,
nPanels=1) "Flat plate solar collector model, has been modified for validation purposes";
Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat(filNam=
Modelica.Utilities.Files.loadResource("modelica://Buildings/Resources/weatherdata/USA_CA_San.Francisco.Intl.AP.724940_TMY3.mos"),
computeWetBulbTemperature=false)
"Weather data file reader";
Buildings.Fluid.Sources.Boundary_pT sou(
redeclare package Medium = Medium,
use_p_in=false,
p(displayUnit="Pa") = 101325,
nPorts=1) "Outlet for water flow";
Buildings.Fluid.Sources.MassFlowSource_T bou(
nPorts=1,
redeclare package Medium = Medium,
use_T_in=false,
m_flow=m_flow_nominal,
T=303.15) "Inlet for water flow, at a prescribed flow rate and temperature";
Buildings.Fluid.Sources.Boundary_pT sou1(
redeclare package Medium = Medium,
use_p_in=false,
p(displayUnit="Pa") = 101325,
nPorts=1) "Outlet for water flow";
Buildings.Fluid.Sources.MassFlowSource_T bou1(
nPorts=1,
redeclare package Medium = Medium,
use_T_in=false,
m_flow=m_flow_nominal,
T=303.15) "Inlet for water flow, at a prescribed flow rate and temperature";
Sensors.TemperatureTwoPort senTem(
redeclare package Medium = Medium,
tau=0,
m_flow_nominal=m_flow_nominal)
"Temperature sensor";
Sensors.TemperatureTwoPort senTem1(
redeclare package Medium = Medium,
tau=0,
m_flow_nominal=m_flow_nominal)
"Temperature sensor";
Modelica.Blocks.Math.Add dT(final k2=-1) "Temperature difference (must be zero)";
equation
connect(weaDat.weaBus, solCol1.weaBus);
connect(bou1.ports[1], solCol1.port_a);
connect(solCol.port_a, bou.ports[1]);
connect(solCol.weaBus, weaDat.weaBus);
connect(solCol2.port_a, solCol1.port_b);
connect(weaDat.weaBus, solCol2.weaBus);
connect(solCol.port_b, senTem.port_a);
connect(senTem.port_b, sou.ports[1]);
connect(sou1.ports[1], senTem1.port_b);
connect(senTem1.port_a, solCol2.port_b);
connect(dT.u1, senTem.T);
connect(senTem1.T, dT.u2);
end EN12975_Series;
Buildings.Fluid.SolarCollectors.Validation.ExtremeAmbientConditions
Validation model for to ensure that collectors do not freeze or boil
Information
This model validates the correct implementation of the heat transfer
to the collector when ambient temperatures are very low or irradiation is very
large.
It applies a ramp boundary condition that reduces the ambient temperature
to -60°C to verify that the collector fluid temperature does not
drop below Medium.T_min.
Afterwards, the solar irradiation is increased to overheat the collector.
If the fluid temperature approaches Medium.T_max,
then the solar heat gain is reduced to zero.
Ensuring these bounds is important as otherwise, the collector model
would trigger an assertion and the simulation would stop.
The tested collector models are
Buildings.Fluid.SolarCollectors.ASHRAE93
and
Buildings.Fluid.SolarCollectors.EN12975.
Note that the medium has been declared
as Buildings.Media.Water(T_min=273.15, T_max=273.15+100)
to set the two bounds for the water temperature.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | Buildings.Media.Water (T_min... | Medium in the system | |
Connectors
| Type | Name | Description |
|---|---|---|
| replaceable package Medium | Medium in the system | |
| Bus | weaBus | |
Modelica definition
model ExtremeAmbientConditions
"Validation model for to ensure that collectors do not freeze or boil"
extends Modelica.Icons.Example;
replaceable package Medium = Buildings.Media.Water(T_min=273.15, T_max=273.15+100)
"Medium in the system";
ASHRAE93 solAsh(
redeclare package Medium = Medium,
shaCoe=0,
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
rho=0.2,
nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
sysConfig=Buildings.Fluid.SolarCollectors.Types.SystemConfiguration.Series,
per=Buildings.Fluid.SolarCollectors.Data.GlazedFlatPlate.FP_GuangdongFSPTY95(),
nPanels=1,
azi=0.3,
til=0.5,
T_start=313.15) "Flat plate solar collector model using the ASHRAE model";
EN12975 solEn(
redeclare package Medium = Medium,
shaCoe=0,
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
rho=0.2,
nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
sysConfig=Buildings.Fluid.SolarCollectors.Types.SystemConfiguration.Series,
nPanels=1,
azi=0.3,
til=0.5,
per=Buildings.Fluid.SolarCollectors.Data.Concentrating.C_VerificationModel(),
T_start=313.15) "Flat plate solar collector model using the EN 12975 model";
Sources.MassFlowSource_T sou(
redeclare package Medium = Medium,
nPorts=1,
m_flow=0) "Inlet boundary conditions";
Sources.Boundary_pT sou1(
redeclare package Medium = Medium,
p(displayUnit="Pa"),
use_p_in=false,
nPorts=2) "Inlet boundary conditions";
Modelica.Blocks.Sources.Ramp TAmb(
offset=273.15 + 40,
height=-100,
duration=10*3600) "Ambient temperature";
Modelica.Blocks.Sources.Ramp HSol(
duration=12*3600,
height=1000,
startTime=10*3600) "Solar irradiation";
Sources.MassFlowSource_T sou2(
redeclare package Medium = Medium,
nPorts=1,
m_flow=0) "Inlet boundary conditions";
BoundaryConditions.WeatherData.Bus weaBus;
Modelica.Blocks.Sources.Constant const(k=0) "Constant that outputs zero";
Modelica.Blocks.Sources.Constant solTim(k=12*3600) "Solar time";
Modelica.Blocks.Sources.Constant lat(k=0.656593) "Location latitude";
Modelica.Blocks.Sources.Constant alt(k=2) "Location altitude";
equation
connect(sou.ports[1], solAsh.port_a);
connect(sou2.ports[1], solEn.port_a);
connect(solAsh.port_b, sou1.ports[1]);
connect(solEn.port_b, sou1.ports[2]);
connect(weaBus, solAsh.weaBus);
connect(TAmb.y, weaBus.TDryBul);
connect(HSol.y, weaBus.HDifHor);
connect(HSol.y, weaBus.HGloHor);
connect(const.y, weaBus.solZen);
connect(const.y, weaBus.cloTim);
connect(solTim.y, weaBus.solTim);
connect(HSol.y, weaBus.HDirNor);
connect(solEn.weaBus, weaBus);
connect(lat.y, weaBus.lat);
connect(alt.y, weaBus.alt);
end ExtremeAmbientConditions;
Buildings.Fluid.SolarCollectors.Validation.FlatPlate
Validation model for FlatPlate
Information
This model was used to validate the Buildings.Fluid.SolarCollectors.ASHRAE93 solar collector model against TRNSYS data. Data files are used to ensure that the Buildings.Fluid.SolarCollectors.ASHRAE93 solar collector model and the TRNSYS model use the same inlet and weather conditions. The solar collector model must reference the Buildings.Fluid.SolarCollectors.Data.GlazedFlatPlate.FP_TRNSYSValidation data record when comparing model results to the stored TRNSYS results.
The solar collector temperature of the Modelica model has a spike in the morning. At this time, there is solar irradiation on the collector but no mass flow rate, which leads to an increase in temperature.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | Buildings.Media.Water | Medium in the system | |
Connectors
| Type | Name | Description |
|---|---|---|
| replaceable package Medium | Medium in the system | |
Modelica definition
model FlatPlate "Validation model for FlatPlate"
extends Modelica.Icons.Example;
replaceable package Medium = Buildings.Media.Water "Medium in the system";
Buildings.Fluid.SolarCollectors.ASHRAE93
solCol(
redeclare package Medium = Medium,
shaCoe=0,
azi=0,
per=Buildings.Fluid.SolarCollectors.Data.GlazedFlatPlate.FP_TRNSYSValidation(),
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
rho=0.2,
nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
nPanels=1,
nSeg=30,
til=0.78539816339745)
"Flat plate solar collector model, has been modified for validation purposes";
Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat(filNam=
Modelica.Utilities.Files.loadResource("modelica://Buildings/Resources/weatherdata/USA_CA_San.Francisco.Intl.AP.724940_TMY3.mos"),
computeWetBulbTemperature=false)
"Weather data file reader";
Buildings.Fluid.Sources.Boundary_pT sou(
redeclare package Medium = Medium,
use_p_in=false,
p(displayUnit="Pa") = 101325,
nPorts=1) "Outlet for water flow";
Buildings.Fluid.Sources.MassFlowSource_T bou(
nPorts=1,
redeclare package Medium = Medium,
use_m_flow_in=true,
use_T_in=true)
"Inlet for water flow, at a prescribed flow rate and temperature";
Modelica.Blocks.Sources.CombiTimeTable datRea(
tableOnFile=true,
tableName="TRNSYS",
columns=2:5,
fileName=Modelica.Utilities.Files.loadResource(
"modelica://Buildings/Fluid/SolarCollectors/Examples/ValidationData/TRNSYSAnnualData.txt"),
smoothness=Modelica.Blocks.Types.Smoothness.ConstantSegments)
"Data reader with inlet conditions from TRNSYS";
Modelica.Blocks.Math.Add add
"Converts TRNSYS data from degree Celsius to Kelving";
Modelica.Blocks.Sources.Constant const(k=273.15)
"Used to convert TRNSYS data from degree Celsius to Kelving";
equation
connect(weaDat.weaBus, solCol.weaBus);
connect(bou.ports[1], solCol.port_a);
connect(const.y, add.u2);
connect(add.y, bou.T_in);
connect(datRea.y[1], add.u1);
connect(datRea.y[4], bou.m_flow_in);
connect(sou.ports[1], solCol.port_b);
end FlatPlate;
Buildings.Fluid.SolarCollectors.Validation.FlatPlateNPanels
Validation model for flat plate collector with different settings for nPanel
Information
This model validates the solar collector model
Buildings.Fluid.SolarCollectors.ASHRAE93
for the case
where the number of panels is 1 for the instance solCol
and 10 for the instance solCol1.
The instances difHeaGai and difHeaLos
compare the heat gain and heat loss between the two models.
The output of these blocks should be zero, except for rounding errors.
Extends from Buildings.Fluid.SolarCollectors.Validation.FlatPlate (Validation model for FlatPlate).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | Water | Medium in the system | |
| Integer | nPanels | 10 | Number of panels |
Modelica definition
model FlatPlateNPanels
"Validation model for flat plate collector with different settings for nPanel"
extends Buildings.Fluid.SolarCollectors.Validation.FlatPlate;
parameter Integer nPanels = 10 "Number of panels";
Buildings.Fluid.SolarCollectors.ASHRAE93
solCol1(
redeclare package Medium = Medium,
shaCoe=0,
azi=0,
per=Buildings.Fluid.SolarCollectors.Data.GlazedFlatPlate.FP_TRNSYSValidation(),
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
rho=0.2,
nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
nSeg=30,
til=0.78539816339745,
nPanels=nPanels)
"Flat plate solar collector model, has been modified for validation purposes";
Buildings.Fluid.Sources.Boundary_pT sou1(
redeclare package Medium = Medium,
use_p_in=false,
p(displayUnit="Pa") = 101325,
nPorts=1) "Outlet for water flow";
Buildings.Fluid.Sources.MassFlowSource_T bou1(
nPorts=1,
redeclare package Medium = Medium,
use_m_flow_in=true,
use_T_in=true)
"Inlet for water flow, at a prescribed flow rate and temperature";
Modelica.Blocks.Math.Gain gaiNPan(k=nPanels) "Gain for number of panels";
Modelica.Blocks.Sources.RealExpression difHeaGai(
y=solCol.heaGai[30].Q_flow - solCol1.heaGai[30].Q_flow/nPanels)
"Difference in heat gain at last panel between model with 1 and with 30 panels";
Modelica.Blocks.Sources.RealExpression difHeaLos(
y=solCol.QLos[30].Q_flow - solCol1.QLos[30].Q_flow/nPanels)
"Difference in heat loss at last panel between model with 1 and with 30 panels";
equation
connect(weaDat.weaBus, solCol1.weaBus);
connect(bou1.ports[1], solCol1.port_a);
connect(add.y, bou1.T_in);
connect(sou1.ports[1], solCol1.port_b);
connect(gaiNPan.y, bou1.m_flow_in);
connect(gaiNPan.u, datRea.y[4]);
end FlatPlateNPanels;
Buildings.Fluid.SolarCollectors.Validation.EN12975_Series.collector
Information
Extends from Buildings.Fluid.SolarCollectors.EN12975 (Model of a concentrating solar collector).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | PartialMedium | Medium in the component | |
| Integer | nSeg | 3 | Number of segments used to discretize the collector model |
| Angle | azi | 0 | Surface azimuth (0 for south-facing; -90 degree for east-facing; +90 degree for west facing [rad] |
| Angle | til | 0.78539816339745 | Surface tilt (0 for horizontally mounted collector) [rad] |
| Real | rho | 0.2 | Ground reflectance |
| HeatCapacity | C | 385*perPar.mDry | Heat capacity of solar collector without fluid (default: cp_copper*mDry*nPanels) [J/K] |
| GenericSolarCollector | per | datSolCol | Performance data |
| GenericSolarCollector | datSolCol | datSolCol(final ATyp=Types.A... | Performance data |
| Shading | |||
| Boolean | use_shaCoe_in | false | Enables an input connector for shaCoe |
| Real | shaCoe | 0 | Shading coefficient. 0.0: no shading, 1.0: full shading |
| Area declarations | |||
| NumberSelection | nColType | Buildings.Fluid.SolarCollect... | Selection of area specification format |
| Integer | nPanels | 1 | Desired number of panels in the simulation |
| Area | totalArea | 0 | Total area of panels in the simulation [m2] |
| Configuration declarations | |||
| SystemConfiguration | sysConfig | Buildings.Fluid.SolarCollect... | Selection of system configuration |
| Dynamics | |||
| Conservation equations | |||
| Dynamics | energyDynamics | Modelica.Fluid.Types.Dynamic... | Type of energy balance: dynamic (3 initialization options) or steady state |
| Real | mSenFac | 1 | Factor for scaling the sensible thermal mass of the volume |
| Advanced | |||
| Dynamics | |||
| Dynamics | massDynamics | energyDynamics | Type of mass balance: dynamic (3 initialization options) or steady state, must be steady state if energyDynamics is steady state |
| MassFlowRate | m_flow_small | 1E-4*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow [kg/s] |
| Diagnostics | |||
| Boolean | show_T | true | = true, if actual temperature at port is computed |
| Initialization | |||
| AbsolutePressure | p_start | Medium.p_default | Start value of pressure [Pa] |
| Temperature | T_start | Medium.T_default | Start value of temperature [K] |
| MassFraction | X_start[Medium.nX] | Medium.X_default | Start value of mass fractions m_i/m [kg/kg] |
| ExtraProperty | C_start[Medium.nC] | fill(0, Medium.nC) | Start value of trace substances |
| ExtraProperty | C_nominal[Medium.nC] | fill(1E-2, Medium.nC) | Nominal value of trace substances. (Set to typical order of magnitude.) |
| Flow resistance | |||
| Boolean | computeFlowResistance | true | =true, compute flow resistance. Set to false to assume no friction |
| Boolean | from_dp | false | = true, use m_flow = f(dp) else dp = f(m_flow) |
| Boolean | linearizeFlowResistance | false | = true, use linear relation between m_flow and dp for any flow rate |
| Real | deltaM | 0.1 | Fraction of nominal flow rate where flow transitions to laminar |
| Assumptions | |||
| Boolean | allowFlowReversal | true | = false to simplify equations, assuming, but not enforcing, no flow reversal |
Connectors
| Type | Name | Description |
|---|---|---|
| replaceable package Medium | Medium in the component | |
| FluidPort_a | port_a | Fluid connector a (positive design flow direction is from port_a to port_b) |
| FluidPort_b | port_b | Fluid connector b (positive design flow direction is from port_a to port_b) |
| input RealInput | shaCoe_in | Shading coefficient |
| Bus | weaBus | Weather data bus |
Modelica definition
model collector
extends Buildings.Fluid.SolarCollectors.EN12975(
redeclare final package Medium = Buildings.Media.Water,
final show_T = true,
final per=datSolCol,
final shaCoe=0,
final azi=0,
final energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
final rho=0.2,
final nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
nPanels=1,
final til=0.78539816339745,
final C=385*perPar.mDry,
final use_shaCoe_in=false,
final sysConfig=Buildings.Fluid.SolarCollectors.Types.SystemConfiguration.Series);
parameter SolarCollectors.Data.GenericSolarCollector datSolCol(
final ATyp=Types.Area.Aperture,
A=4.302,
V=4.4/1000,
final dp_nominal = 100,
final mperA_flow_nominal=0.0241,
final y_intercept=0.720,
final IAMDiff=0.133,
final C1=2.8312,
final C2=0.00119,
final B0=0,
final B1=0,
mDry=484,
final slope=0,
final G_nominal = 1000,
final dT_nominal = 20) "Performance data";
end collector;