我目前正在构建热能回收蒸汽发生器，刚刚从ThermoPower库开始构建并将蒸发器连接到节能器。 尝试模拟时，OMEdit Simulator中发生错误：
在时间0处被零除（a = -458389.9207317767）/（b = 0），其中除数b表达式为：8.75988806777792 * Economizer.metalTube.Am * Economizer.metalTube.rhomcm * / 实数 /（（Economizer.metalTube.Nt）
如果我无法定义或定位导致b = 0的所需变量，如何准确地解决此错误？ 请让我知道您对此的看法。非常感谢您的时间和精力。
我不是最擅长调试模型的人，但是我有个主意，在解决这个问题上有些困惑。我最初的困惑是验证哪个变量导致b = 0。但是，在检查时，我注意到在我的省煤器类中如何不存在变量Economizer.metalTube.Nt，Economizer.metalTube.Am。我知道它必须通过扩展和部分类植根于我的类中，并试图在我的节能器模型的文本视图中定义这些“缺失”变量，但这只会导致错误：
[1] 11:46:14翻译错误 [ThermoPower_HRSG_Econ_Evap：68：3-92：112]：可变节能器：在修饰符（Nt = 3）中，未在中找到类或组件Nt。
如果您有任何建议和/或建议，请在下面发表评论！
/// UPDATE：在我从别人那里学到东西并落实他们的建议之后，继续前进。///
阅读了您和其他人对我在OpenModelica上的问题所发表的看法后，我对情况有了更好的了解。但是，对于继续调试模型的最佳方法，我仍然感到困惑。
因此，我的“节能器”模型或ThermoPower.Examples.RankineCycles.Models.HE中的换热器出现与除数“ b = 0”相关的错误。
在调试时，错误将我链接到软件包“ thermal”，使我指向正在标记的代码行：
(L/Nw*Nt)*rhomcm*Am*der(Tvol) = int.Q + ext.Q "Energy balance";
此代码行也在Economizer HE类（ThermoPower.Examples.RankineCycles.Models.HE）中使用。在HE.mo的此处，也包含来自热包装的引起错误的相同代码行。是什么使我的模型引起分频器“ b = 0”是变量：L，Nw，Nt，Am和Tvol。在定义系统参数时，我正在使用的模型中没有定义/找到这些变量。
作为OpenModelica用户，我感到困惑的是，上面提到的那些变量（L，Nw，Nt，Am和Tvol）是在组件的ThermoPower.Examples.RankineCycles.Models.HE文本视图中编码/定义的，但是当我尝试将它们定义/添加到属于ThermoPower.Examples.RankineCycles.Models.HE类的Economizer.mo中时，会触发错误，提示：
[ThermoPower_HRSG_Econ_Evap: 69:3-94:112]: Variable Economizer: In modifier
(Nt = 1), class or component Nt not found in
<ThermoPower.Examples.RankineCycle.Models.HE$Economizer>.
从本质上讲，导致分频器“ b = 0”的错误位于我正在使用的节能器的基类中。但是，由于在我的Economizer.mo模型中缺少或无法定义这些所需变量，因此方程式：
(L/Nw*Nt)*rhomcm*Am*der(Tvol) = int.Q + ext.Q "Energy balance";
现在被违反了。如何正确解决此问题？
///更新：代码位于下面////
model ThermoPower_HRSG_Econ_Evap
ThermoPower.Gas.SourceMassFlow Source_FlueGas(
redeclare package Medium = ThermoPower.Media.FlueGas,
T = 331.59 + 273.15,
p0 = 101325,
w0 = 169.755) annotation(
Placement(visible = true, transformation(origin = {-92, 30}, extent =
{{-10, -10}, {10, 10}}, rotation = 0)));
ThermoPower.Water.SourceMassFlow Source_Steam(
T = 46.45 + 273.15,
h = 203.22e3,
p0 = 80e5,
use_T = true,
w0 = 21.5) annotation(
Placement(visible = true, transformation(origin = {-10, 90}, extent =
{{-10, -10}, {10, 10}}, rotation = 0)));
ThermoPower.Water.SensT sensT_WaterIn_Econ annotation(
Placement(visible = true, transformation(origin = {4, 60}, extent = {{-10,
-10}, {10, 10}}, rotation = -90)));
ThermoPower.Water.SensT sensT_WaterOut_Econ annotation(
Placement(visible = true, transformation(origin = {4, 0}, extent = {{-10,
-10}, {10, 10}}, rotation = -90)));
ThermoPower.Gas.SensT sensT_ExhaustIn_Econ(
redeclare package Medium = ThermoPower.Media.FlueGas) annotation(
Placement(visible = true, transformation(origin = {-50, 34}, extent =
{{-10, -10}, {10, 10}}, rotation = 0)));
ThermoPower.Gas.SensT sensT_ExhaustOut_Econ(
redeclare package Medium = ThermoPower.Media.FlueGas) annotation(
Placement(visible = true, transformation(origin = {50, 34}, extent =
{{-10, -10}, {10, 10}}, rotation = 0)));
inner ThermoPower.System system annotation(
Placement(visible = true, transformation(origin = {-90, 90}, extent =
{{-10, -10}, {10, 10}}, rotation = 0)));
ThermoPower.Gas.SinkPressure Sink_FlueGas(
redeclare package Medium = ThermoPower.Media.FlueGas,
p0 = 101325) annotation(
Placement(visible = true, transformation(origin = {94, -70}, extent =
{{-10, -10}, {10, 10}}, rotation = 0)));
ThermoPower.Water.SinkPressure Sink_Steam(
p0 = 80e5) annotation(
Placement(visible = true, transformation(origin = {10, -90}, extent =
{{-10, -10}, {10, 10}}, rotation = 0)));
ThermoPower.Examples.HRB.Models.Evaporator Evaporator(
cm = 480,
exchSurface = 2.752,
fluidNomFlowRate = 21.5,
fluidNomPressure = 8e+06,
fluidVol = 0.01376,
gamma = 85,
gasNomFlowRate = 169.755,
gasNomPressure = 101325,
gasVol = 0.01376,
metalVol = 0.01376,
rhom(displayUnit = "kg/m3") = 8055,
rhonom_G = 1) annotation(
Placement(visible = true, transformation(origin = {0, -50}, extent =
{{-10, -10}, {10, 10}}, rotation = 0)));
ThermoPower.Gas.SensT sensT_ExhaustOut_Evap(
redeclare package Medium = ThermoPower.Media.FlueGas) annotation(
Placement(visible = true, transformation(origin = {50, -66}, extent =
{{-10, -10}, {10, 10}}, rotation = 0)));
Modelica.Blocks.Continuous.FirstOrder VoidFractionSensor annotation(
Placement(visible = true, transformation(origin = {53, -43}, extent =
{{-5, -5}, {5, 5}}, rotation = 0)));
Modelica.Blocks.Interfaces.RealOutput VoidFraction annotation(
Placement(visible = true, transformation(origin = {110, -42}, extent =
{{-10, -10}, {10, 10}}, rotation = 0), iconTransformation(origin = {110,
-42}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
ThermoPower.Examples.RankineCycle.Models.HE Economizer(
FFtype_G = ThermoPower.Choices.Flow1D.FFtypes.OpPoint,
FluidPhaseStart = ThermoPower.Choices.FluidPhase.FluidPhases.Liquid,
N_F = 6,
N_G = 6,
Tstart_G = 604.74,
Tstart_M = 573.15, counterCurrent = true,
exchSurface_F = 2.752,
exchSurface_G = 2.752,
extSurfaceTub = 5.504,
fluidNomFlowRate = 21.5,
fluidNomPressure = 8e+06,
fluidVol = 0.01376,
gamma_F = 3000,
gamma_G = 30,
gasNomFlowRate = 169.755,
gasNomPressure = 101325,
gasVol = 0.01376,
lambda = 19.8,
metalVol = 0.01376,
rhomcm = 8055 * 480,
rhonom_F(displayUnit = "kg/m3") = 997,
rhonom_G = 1) annotation(
Placement(visible = true, transformation(origin = {0, 30}, extent = {{-10,
-10}, {10, 10}}, rotation = 0)));
equation
connect(Economizer.gasOut, sensT_ExhaustOut_Econ.inlet) annotation(
Line(points = {{10, 30}, {44, 30}, {44, 30}, {44, 30}}, color = {159, 159,
223}));
connect(sensT_ExhaustIn_Econ.outlet, Economizer.gasIn) annotation(
Line(points = {{-44, 30}, {-10, 30}, {-10, 30}, {-10, 30}}, color = {159,
159, 223}));
connect(Economizer.waterOut, sensT_WaterOut_Econ.inlet) annotation(
Line(points = {{0, 20}, {0, 20}, {0, 6}, {0, 6}}, color = {0, 0, 255}));
connect(sensT_WaterIn_Econ.outlet, Economizer.waterIn) annotation(
Line(points = {{0, 54}, {0, 54}, {0, 40}, {0, 40}}, color = {0, 0, 255}));
connect(VoidFractionSensor.y, VoidFraction) annotation(
Line(points = {{58, -42}, {104, -42}, {104, -42}, {110, -42}}, color = {0,
0, 127}));
connect(Evaporator.voidFraction, VoidFractionSensor.u) annotation(
Line(points = {{10, -44}, {46, -44}, {46, -42}, {46, -42}}, color = {0, 0,
127}));
connect(sensT_ExhaustOut_Evap.outlet, Sink_FlueGas.flange) annotation(
Line(points = {{56, -70}, {70, -70}, {70, -70}, {84, -70}, {84, -70}, {84,
-70}}, color = {159, 159, 223}));
connect(Evaporator.gasOut, sensT_ExhaustOut_Evap.inlet) annotation(
Line(points = {{10, -50}, {26, -50}, {26, -70}, {44, -70}}, color = {159,
159, 223}));
connect(sensT_ExhaustOut_Econ.outlet, Evaporator.gasIn) annotation(
Line(points = {{56, 30}, {68, 30}, {68, -20}, {-50, -20}, {-50, -20},
{-70, -20}, {-70, -50}, {-10, -50}, {-10, -50}}, color = {159, 159,
223}));
connect(sensT_WaterOut_Econ.outlet, Evaporator.waterIn) annotation(
Line(points = {{0, -6}, {0, -40}}, color = {0, 0, 255}));
connect(Evaporator.waterOut, Sink_Steam.flange) annotation(
Line(points = {{0, -60}, {0, -90}}, color = {0, 0, 255}));
connect(Source_FlueGas.flange, sensT_ExhaustIn_Econ.inlet) annotation(
Line(points = {{-82, 30}, {-56, 30}}, color = {159, 159, 223}));
connect(Source_Steam.flange, sensT_WaterIn_Econ.inlet) annotation(
Line(points = {{0, 90}, {0, 66}}, color = {0, 0, 255}));
annotation(
uses(ThermoPower(version = "3.1"), Modelica(version = "3.2.3")));end
ThermoPower_HRSG_Econ_Evap;