为什么q_nom & head_nom总是给由ThermoPower库构建的模型提供问题？

Question

我已经在ThermoPower OpenModelica库中工作了一段时间，现在我试图通过首先建模Brayton和Rankine循环来构建一个组合的电源循环。

每当我尝试使用一个泵时，我总是会收到这样的错误：

[1] 10:31:00 Translation Error
[ThermoPower.Examples: 2523:70-2523:81]: Variable q_nom not found in scope ThermoPower.Examples.RankineCycle.Models.

[2] 10:31:00 Translation Error
[ThermoPower.Examples: 2531:21-2531:69]: Cyclically dependent constants or parameters found in scope : {q_nom}, {head_nom} (ignore with -d=ignoreCycles).

任何选择的泵，都会为我的模型声明这些错误。我尝试过许多不同类型的解决方案，但都没有成功。

1. 我尝试使用向量格式(即：q_nom = {1,1,1} )声明泵的组件参数的值。在尝试模拟时会出现相同的错误。
2. 我已经尝试直接单击错误，但只被重新定向到ThermoPower.PowerPlants。这里我的目标是一行代码： 函数flowCharacteristic =flowCharacteristic (q_nom= q_nom，head_nom=head_nom)；

在这里，我尝试手动输入q_nom & head_nom的值，但没有成功。我还尝试在我的模型顶部复制上面的代码行，试图“重新声明”函数flowCharacteristic。这只会导致错误地重新声明不可声明的类。

我尝试过其他的解决方案，但没有成功。

如果您对如何解决此问题有任何建议，请随时将您的输入留在下面！

更新：

下面是我已经研究了一段时间的模型的代码。

Rankine_HRSG模型

ThermoPower.PowerPlants.HRSG.Components.HE Superheater(
Cfnom_F = 0, 
Cfnom_G = 0, 
FFtype_F = ThermoPower.Choices.Flow1D.FFtypes.NoFriction, 
FFtype_G = ThermoPower.Choices.Flow1D.FFtypes.NoFriction, 
FluidPhaseStart = ThermoPower.Choices.FluidPhase.FluidPhases.Steam, 
HCtype_F = ThermoPower.Choices.Flow1D.HCtypes.Downstream, 
Kfnom_F = 0, 
Kfnom_G = 0, 
N_F = 2, 
N_G = 2, 
Nt = 1, 
Tstartbar_G = 1073.15, 
dpnom_F = 0, 
dpnom_G = 0, 
exchSurface_F = 10, 
exchSurface_G = 10, 
extSurfaceTub = 20, 
fluidNomFlowRate = 50, 
fluidNomPressure = 1e+06, 
fluidVol = 10, 
gasNomFlowRate = 102, 
gasNomPressure = 101325, 
gasQuasiStatic = false, 
gasVol = 10, 
lambda = 366, 
metalVol = 10, 
pstart_F = 5e+06, 
pstart_G = 101325, 
rhonom_F = 1000, 
rhonom_G = 0.33)
  annotation(
Placement(visible = true, transformation(origin = {50, 50}, extent = 
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.PowerPlants.HRSG.Components.HE Economizer(
Cfnom_F = 0,
Cfnom_G = 0, 
FFtype_F = ThermoPower.Choices.Flow1D.FFtypes.NoFriction, 
FFtype_G = ThermoPower.Choices.Flow1D.FFtypes.NoFriction, 
FluidPhaseStart = ThermoPower.Choices.FluidPhase.FluidPhases.Liquid, 
HCtype_F = ThermoPower.Choices.Flow1D.HCtypes.Downstream, 
Kfnom_F = 0, 
Kfnom_G = 0, 
N_F = 2, 
N_G = 2, 
Nt = 1, 
Tstartbar_G = 1023.15, 
dpnom_F = 0, 
dpnom_G = 0, 
exchSurface_F = 10, 
exchSurface_G = 10, 
extSurfaceTub = 20, 
fluidNomFlowRate = 50, 
fluidNomPressure = 1e+06, 
fluidVol = 10, 
gasNomFlowRate = 102, 
gasNomPressure = 101325, 
gasVol = 10, 
lambda = 366, 
metalVol = 10, 
pstart_F = 5e+06, 
pstart_G = 101325, 
rhonom_F = 1000, 
rhonom_G = 0.33)
  annotation(
Placement(visible = true, transformation(origin = {50, -50}, extent = 
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.Examples.HRB.Models.Evaporator Evaporator(
Cfnom_G = 0, 
FFtype_G = ThermoPower.Choices.Flow1D.FFtypes.NoFriction, 
Kfnom_G = 0,
N = 2, 
Tstart = 1048.15, 
cm = 376.812, 
dpnom_G = 0, 
exchSurface = 10, 
fluidNomFlowRate = 50, 
fluidNomPressure = 1e+06, 
fluidVol = 10, 
gamma = 300, 
gasNomFlowRate = 102, 
gasNomPressure = 101325, 
gasVol = 10, 
metalVol = 10, 
rhom = 8400, 
rhonom_G = 0.33)
  annotation(
Placement(visible = true, transformation(origin = {50, 0}, extent = {{-10, 
-10}, {10, 10}}, rotation = 180)));

ThermoPower.Gas.SourcePressure FlueGasSource(
redeclare package Medium = ThermoPower.Media.FlueGas, 
R = 0, 
T = 800, 
p0 = 101325)
  annotation(
Placement(visible = true, transformation(origin = {94, 50}, extent = 
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.Gas.SinkPressure FlueGasSink(
redeclare package Medium = ThermoPower.Media.FlueGas, 
R = 0, 
T = 700, 
p0 = 101325)
  annotation(
Placement(visible = true, transformation(origin = {10, -50}, extent = 
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.Water.SteamTurbineStodola SteamTurbine(
PRstart = 1,
eta_iso_nom = 0.92, 
explicitIsentropicEnthalpy = true, 
partialArc_nom = 1, 
pnom = 10e5, 
wnom = 50, 
wstart = 50)
  annotation(
Placement(visible = true, transformation(origin = {0, 80}, extent = {{-10, 
-10}, {10, 10}}, rotation = 180)));

ThermoPower.Examples.RankineCycle.Models.PrescribedPressureCondenser 
Condenser(
Vtot = 10, 
p = 1e+06)
  annotation(
Placement(visible = true, transformation(origin = {-50, 30}, extent = 
{{-10, -10}, {10, 10}}, rotation = 0)));

ThermoPower.Water.Pump Pump(
CheckValve = true,Np0 = 1, 
V = 10, 
dp0 = 0, head(start = 1), 
hstart = 1e5, 
n0 = 150, 
n_const = 150, q_single(fixed = false), rho0 = 1000, 
w0 = 50, 
w_single(fixed = false), 
wstart = 50)
  annotation(
Placement(visible = true, transformation(origin = {-38, -12}, extent = 
{{-10, -10}, {10, 10}}, rotation = 0)));

Modelica.Mechanics.Rotational.Sensors.PowerSensor PowerSensor annotation(
Placement(visible = true, transformation(origin = {-38, 68}, extent = 
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.Electrical.Generator Generator annotation(
Placement(visible = true, transformation(origin = {-68, 68}, extent = 
{{-10, -10}, {10, 10}}, rotation = 180)));

Modelica.Blocks.Continuous.FirstOrder firstOrder1 annotation(
Placement(visible = true, transformation(origin = {-50, 92}, extent = 
{{-8, -8}, {8, 8}}, rotation = 180)));

Modelica.Blocks.Interfaces.RealOutput Power annotation(
Placement(visible = true, transformation(origin = {-110, 0}, extent = 
{{-10, -10}, {10, 10}}, rotation = 180), iconTransformation(origin = 
{-110, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 180)));
inner ThermoPower.System system annotation(
Placement(visible = true, transformation(origin = {90, 90}, extent = 
{{-10, -10}, {10, 10}}, rotation = 0)));
equation
connect(PowerSensor.flange_b, Generator.shaft) annotation(
Line(points = {{-48, 68}, {-59, 68}}));
connect(SteamTurbine.shaft_b, PowerSensor.flange_a) annotation(
Line(points = {{-6, 80}, {-14, 80}, {-14, 68}, {-28, 68}}));
connect(SteamTurbine.outlet, Condenser.steamIn) annotation(
Line(points = {{-8, 72}, {-8, 52}, {-50, 52}, {-50, 40}}, color = {0, 0, 
255}));
connect(Superheater.waterOut, SteamTurbine.inlet) annotation(
Line(points = {{50, 60}, {50, 64}, {8, 64}, {8, 72}}, color = {0, 0, 
255}));
connect(Evaporator.waterOut, Superheater.waterIn) annotation(
Line(points = {{50, 10}, {50, 10}, {50, 40}, {50, 40}}, color = {0, 0, 
255}));
connect(Economizer.waterOut, Evaporator.waterIn) annotation(
Line(points = {{50, -40}, {50, -40}, {50, -10}, {50, -10}}, color = {0, 0, 
255}));
connect(firstOrder1.y, Power) annotation(
Line(points = {{-58, 92}, {-90, 92}, {-90, 0}, {-102, 0}, {-102, 0}, 
{-110, 0}}, color = {0, 0, 127}));
connect(PowerSensor.power, firstOrder1.u) annotation(
Line(points = {{-30, 80}, {-30, 80}, {-30, 92}, {-40, 92}, {-40, 92}, 
{-40, 92}}, color = {0, 0, 127}));
connect(Condenser.waterOut, Pump.infl) annotation(
Line(points = {{-50, 20}, {-50, -10}, {-46, -10}}, color = {0, 0, 255}));
connect(Pump.outfl, Economizer.waterIn) annotation(
Line(points = {{-32, -4}, {-26, -4}, {-26, -80}, {50, -80}, {50, -60}, 
{50, -60}}, color = {0, 0, 255}));
connect(Economizer.gasOut, FlueGasSink.flange) annotation(
Line(points = {{40, -50}, {20, -50}, {20, -50}, {20, -50}}, color = {159, 
159, 223}));
connect(Superheater.gasOut, Evaporator.gasIn) annotation(
Line(points = {{40, 50}, {20, 50}, {20, 30}, {80, 30}, {80, 0}, {60, 0}}, 
color = {159, 159, 223}));
connect(Evaporator.gasOut, Economizer.gasIn) annotation(
Line(points = {{40, 0}, {20, 0}, {20, -26}, {20, -26}, {20, -30}, {80, 
-30}, {80, -50}, {60, -50}, {60, -50}}, color = {159, 159, 223}));
connect(FlueGasSource.flange, Superheater.gasIn) annotation(
Line(points = {{84, 50}, {60, 50}, {60, 50}, {60, 50}}, color = {159, 159, 
223}));

annotation(
uses(ThermoPower(version = "3.1"), Modelica(version = "3.2.2")));end 
Rankine_HRSG;

Answer 1

我成功地使用OMEdit v1.12.0 (64位)再现了错误。但是，它似乎是我们正在使用的OpenModelica版本的一个bug。戴莫拉模型相同，没有错误/警告。此外，在OpenModelica中模拟该示例对我也有帮助。此外，使用这一行：

  function flowCharacteristic =
      ThermoPower.Functions.PumpCharacteristics.quadraticFlow (q_nom={1,2,3},
        head_nom={1,2,3});

修复此翻译错误。也许试着下载其他版本的OM。如果使用最新版本，降级，如果使用旧版本，则升级。如果您不能使用我提供的行修复此错误，请提供您正在使用的ThermoLib和OM的版本。

编辑：查看您的模型，有一些问题：

1. 当您在rankine循环中使用泵时，您必须为流程特性选择一个函数，并给出q_nom和head_nom的值。
2. 你提供的循环缺少一个推动者。气体必须通过泵或massFlowSource穿过你的循环。
3. 您声明了一个参数partialArc_nom = 1，它不在ThermoPower的模型SteamTurbine中使用。

修正所有这些误差会导致一个模型，该模型在OM和Dymola中都是平移的，没有误差。由于某些固有的数值和方程会引起麻烦，所以模拟无法工作。通过将每个子模型的固有值传播到顶层来改变气体介质或设置参数initialValues，可以解决这个问题。这也可能是我为参数q_nom和head_nom设置的虚拟值造成的。为这些参数选择物理值取决于您。在为我工作的固定代码下面找到。

model Rankine_HRSG

ThermoPower.PowerPlants.HRSG.Components.HE Superheater(
Cfnom_F = 0,
Cfnom_G = 0,
FFtype_F = ThermoPower.Choices.Flow1D.FFtypes.NoFriction,
FFtype_G = ThermoPower.Choices.Flow1D.FFtypes.NoFriction,
FluidPhaseStart = ThermoPower.Choices.FluidPhase.FluidPhases.Steam,
HCtype_F = ThermoPower.Choices.Flow1D.HCtypes.Downstream,
Kfnom_F = 0,
Kfnom_G = 0,
N_F = 2,
N_G = 2,
Nt = 1,
dpnom_F = 0,
dpnom_G = 0,
exchSurface_F = 10,
exchSurface_G = 10,
extSurfaceTub = 20,
fluidNomFlowRate = 50,
fluidVol = 10,
gasNomFlowRate = 102,
gasQuasiStatic = false,
gasVol = 10,
lambda = 366,
metalVol = 10,
rhonom_F = 1000,
rhonom_G = 0.33,
    gasNomPressure=101325,
    fluidNomPressure=1000000,
    rhomcm=1000,
    Tstartbar_G=1073.15,
    pstart_G=101325,
    pstart_F=5000000)
  annotation (
Placement(visible = true, transformation(origin = {50, 50}, extent=
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.PowerPlants.HRSG.Components.HE Economizer(
Cfnom_F = 0,
Cfnom_G = 0,
FFtype_F = ThermoPower.Choices.Flow1D.FFtypes.NoFriction,
FFtype_G = ThermoPower.Choices.Flow1D.FFtypes.NoFriction,
FluidPhaseStart = ThermoPower.Choices.FluidPhase.FluidPhases.Liquid,
HCtype_F = ThermoPower.Choices.Flow1D.HCtypes.Downstream,
Kfnom_F = 0,
Kfnom_G = 0,
N_F = 2,
N_G = 2,
Nt = 1,
dpnom_F = 0,
dpnom_G = 0,
exchSurface_F = 10,
exchSurface_G = 10,
extSurfaceTub = 20,
fluidNomFlowRate = 50,
fluidVol = 10,
gasNomFlowRate = 102,
gasVol = 10,
lambda = 366,
metalVol = 10,
rhonom_F = 1000,
rhonom_G = 0.33,
    gasNomPressure=101325,
    fluidNomPressure=1000000,
    rhomcm=1000,
    Tstartbar_G=1023.15,
    pstart_G=101325,
    pstart_F=5000000)
  annotation (
Placement(visible = true, transformation(origin = {50, -50}, extent=
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.Examples.HRB.Models.Evaporator Evaporator(
Cfnom_G = 0,
FFtype_G = ThermoPower.Choices.Flow1D.FFtypes.NoFriction,
Kfnom_G = 0,
N = 2,
cm = 376.812,
dpnom_G = 0,
exchSurface = 10,
fluidNomFlowRate = 50,
fluidVol = 10,
gamma = 300,
gasNomFlowRate = 102,
gasVol = 10,
metalVol = 10,
rhom = 8400,
rhonom_G = 0.33,
    gasNomPressure=101325,
    fluidNomPressure=1000000,
    Tstart=1048.15)
  annotation (
Placement(visible = true, transformation(origin = {50, 0}, extent = {{-10,
-10}, {10, 10}}, rotation = 180)));

ThermoPower.Gas.SourceMassFlow FlueGasSource(
redeclare package Medium = ThermoPower.Media.FlueGas,
    p0=101325,
    T=800,
    w0=1)
  annotation (
Placement(visible = true, transformation(origin = {94, 50}, extent=
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.Gas.SinkPressure FlueGasSink(
redeclare package Medium = ThermoPower.Media.FlueGas,
R = 0,
T = 700,
p0 = 101325)
  annotation (
Placement(visible = true, transformation(origin = {10, -50}, extent=
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.Water.SteamTurbineStodola SteamTurbine(
PRstart = 1,
eta_iso_nom = 0.92,
explicitIsentropicEnthalpy = true,
wnom = 50,
wstart = 50,
    pnom=1000000,
    Kt=1)
  annotation (
Placement(visible = true, transformation(origin = {0, 80}, extent = {{-10,
-10}, {10, 10}}, rotation = 180)));
//partialArc_nom = 1,

ThermoPower.Examples.RankineCycle.Models.PrescribedPressureCondenser
Condenser(
Vtot = 10, p=1000000)
  annotation (
Placement(visible = true, transformation(origin = {-50, 30}, extent=
{{-10, -10}, {10, 10}}, rotation = 0)));

ThermoPower.Water.Pump Pump(
CheckValve = true,Np0 = 1,
V = 10,
dp0 = 0, head(start = 1),
hstart = 1e5,
n0 = 150,
n_const = 150, q_single(fixed = false), rho0 = 1000,
w0 = 50,
w_single(fixed = false),
wstart = 50,
    redeclare function efficiencyCharacteristic =
        ThermoPower.Functions.PumpCharacteristics.constantEfficiency (eta_nom=0.8),
    redeclare function flowCharacteristic =
        ThermoPower.Functions.PumpCharacteristics.linearFlow (q_nom={0.5,1},
          head_nom={10,15}))
  annotation (
Placement(visible = true, transformation(origin = {-38, -12}, extent=
{{-10, -10}, {10, 10}}, rotation = 0)));

Modelica.Mechanics.Rotational.Sensors.PowerSensor PowerSensor annotation (
Placement(visible = true, transformation(origin = {-38, 68}, extent=
{{-10, -10}, {10, 10}}, rotation = 180)));

ThermoPower.Electrical.Generator Generator annotation (
Placement(visible = true, transformation(origin = {-68, 68}, extent=
{{-10, -10}, {10, 10}}, rotation = 180)));

Modelica.Blocks.Continuous.FirstOrder firstOrder1 annotation (
Placement(visible = true, transformation(origin = {-50, 92}, extent=
{{-8, -8}, {8, 8}}, rotation = 180)));

Modelica.Blocks.Interfaces.RealOutput Power annotation (
Placement(visible = true, transformation(origin = {-110, 0}, extent=
{{-10, -10}, {10, 10}}, rotation = 180), iconTransformation(origin=
{-110, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 180)));
inner ThermoPower.System system annotation (
Placement(visible = true, transformation(origin = {90, 90}, extent=
{{-10, -10}, {10, 10}}, rotation = 0)));
equation
connect(PowerSensor.flange_b, Generator.shaft) annotation (
Line(points={{-48,68},{-59.4,68}}));
connect(SteamTurbine.shaft_b, PowerSensor.flange_a) annotation (
Line(points={{-6.4,80},{-14,80},{-14,68},{-28,68}}));
connect(SteamTurbine.outlet, Condenser.steamIn) annotation (
Line(points = {{-8, 72}, {-8, 52}, {-50, 52}, {-50, 40}}, color = {0, 0,
255}));
connect(Superheater.waterOut, SteamTurbine.inlet) annotation (
Line(points = {{50, 60}, {50, 64}, {8, 64}, {8, 72}}, color = {0, 0,
255}));
connect(Evaporator.waterOut, Superheater.waterIn) annotation (
Line(points = {{50, 10}, {50, 10}, {50, 40}, {50, 40}}, color = {0, 0,
255}));
connect(Economizer.waterOut, Evaporator.waterIn) annotation (
Line(points = {{50, -40}, {50, -40}, {50, -10}, {50, -10}}, color = {0, 0,
255}));
connect(firstOrder1.y, Power) annotation (
Line(points={{-58.8,92},{-90,92},{-90,0},{-102,0},{-102,0},{-110,0}},
            color = {0, 0, 127}));
connect(PowerSensor.power, firstOrder1.u) annotation (
Line(points={{-30,79},{-30,79},{-30,92},{-40,92},{-40,92},{-40.4,92}},
            color = {0, 0, 127}));
connect(Condenser.waterOut, Pump.infl) annotation (
Line(points = {{-50, 20}, {-50, -10}, {-46, -10}}, color = {0, 0, 255}));
connect(Pump.outfl, Economizer.waterIn) annotation (
Line(points={{-32,-5},{-26,-5},{-26,-80},{50,-80},{50,-60},{50,-60}},
            color = {0, 0, 255}));
connect(Economizer.gasOut, FlueGasSink.flange) annotation (
Line(points = {{40, -50}, {20, -50}, {20, -50}, {20, -50}}, color = {159,
159, 223}));
connect(Superheater.gasOut, Evaporator.gasIn) annotation (
Line(points = {{40, 50}, {20, 50}, {20, 30}, {80, 30}, {80, 0}, {60, 0}},
color = {159, 159, 223}));
connect(Evaporator.gasOut, Economizer.gasIn) annotation (
Line(points = {{40, 0}, {20, 0}, {20, -26}, {20, -26}, {20, -30}, {80,
-30}, {80, -50}, {60, -50}, {60, -50}}, color = {159, 159, 223}));
connect(FlueGasSource.flange, Superheater.gasIn) annotation (
Line(points = {{84, 50}, {60, 50}, {60, 50}, {60, 50}}, color = {159, 159,
223}));

annotation (
uses(ThermoPower(version = "3.1"), Modelica(version = "3.2.2")));
end Rankine_HRSG;