Can';t使Modelica标准库中的泵工作
我想通过泵送系统(Pompa)从水源(火山灰)中提取水来填充一个开放式水箱(bacinella2)。问题很简单,但我无法在openmodelica中实现 我试图消除泵,直接连接两个管道tubo1和tubo2,系统正常工作,这就是为什么我认为缺陷存在于泵对象中Can';t使Modelica标准库中的泵工作,modelica,openmodelica,Modelica,Openmodelica,我想通过泵送系统(Pompa)从水源(火山灰)中提取水来填充一个开放式水箱(bacinella2)。问题很简单,但我无法在openmodelica中实现 我试图消除泵,直接连接两个管道tubo1和tubo2,系统正常工作,这就是为什么我认为缺陷存在于泵对象中 model Pompaggio Modelica.Fluid.Machines.ControlledPump Pompa( redeclare package Medium = Modelica.Media.Water.Stan
model Pompaggio
Modelica.Fluid.Machines.ControlledPump Pompa(
redeclare package Medium = Modelica.Media.Water.StandardWater,
//N_nominal=1500,
use_T_start=true,
T_start=Modelica.SIunits.Conversions.from_degC(40),
m_flow_start=0.1,
control_m_flow=true,
allowFlowReversal=false,
p_a_start=110000,
p_b_start=130000,
p_a_nominal=110000,
p_b_nominal=130000,
m_flow_nominal=0.1
);
Modelica.Fluid.Sources.Boundary_pT Pozzetto(redeclare package Medium = Modelica.Media.Water.StandardWater,
nPorts = 1, T=Modelica.SIunits.Conversions.from_degC(40), p = 101325 );
Modelica.Fluid.Vessels.OpenTank bacinella2(redeclare package Medium = Modelica.Media.Water.StandardWater,
crossArea = 4, height = 100, level(start = 0.01), nPorts = 1,
portsData = {Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter = 0.1)}, use_portsData = true);
Modelica.Fluid.Pipes.StaticPipe tubo1(redeclare package Medium = Modelica.Media.Water.StandardWater,
allowFlowReversal = true, diameter = 0.1, height_ab = 0, isCircular = true, length = 200, nParallel = 1);
Modelica.Fluid.Pipes.StaticPipe tubo2(redeclare package Medium = Modelica.Media.Water.StandardWater,
allowFlowReversal = true, diameter = 0.1, height_ab = 0, isCircular = true, length = 200, nParallel = 1);
equation
connect(Pozzetto.ports[1], tubo1.port_a);
connect(Pompa.port_a, tubo1.port_b);
connect(Pompa.port_b, tubo2.port_a);
//connect( tubo1.port_b, tubo2.port_a);
connect(bacinella2.ports[1], tubo2.port_b);
end Pompaggio;
有人能帮我吗?谢谢该模型的工作原理与Dymola相同。它给出了一些警告,导致OpenModelica中问题的解决。该模型实际上有两个“问题”:
Bacinela2的启动值
:将值设置为T_Start(Start=293.15)
,端口(p(Start={101422.89174430574}))
可避免介质压力过低的警告。但实际上,这并不能解决翻译过程中出现的原始模型问题state的设置在Pompa.medium
中选择。Dymola输出警告,表示它已将设置从StateSelect.preference
更改为StateSelect.default
,因为它们无法区分。这是为Pompa.medium.h
和Pompa.medium.p
完成的。OpenModelica似乎无法自动执行此操作,因此手动更改它似乎是必要的
model Pompaggio_modified
Modelica.Fluid.Machines.ControlledPump Pompa(
redeclare package Medium = Modelica.Media.Water.StandardWater,
medium(h(stateSelect = StateSelect.default), p(stateSelect = StateSelect.default)),
use_T_start=true,
T_start=Modelica.SIunits.Conversions.from_degC(40),
m_flow_start=0.1,
control_m_flow=true,
allowFlowReversal=false,
p_a_start=110000,
p_b_start=130000,
p_a_nominal=110000,
p_b_nominal=130000,
m_flow_nominal=0.1);
//N_nominal=1500,
Modelica.Fluid.Sources.Boundary_pT Pozzetto(redeclare package Medium = Modelica.Media.Water.StandardWater,
nPorts = 1, T=Modelica.SIunits.Conversions.from_degC(40), p = 101325);
Modelica.Fluid.Vessels.OpenTank bacinella2(redeclare package Medium = Modelica.Media.Water.StandardWater,
crossArea = 4, height = 100, level(start = 0.01), nPorts = 1,
portsData = {Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter = 0.1)}, use_portsData = true,
T_start(start=293.15),
ports(p(start={101422.89174430574})));
Modelica.Fluid.Pipes.StaticPipe tubo1(redeclare package Medium = Modelica.Media.Water.StandardWater,
allowFlowReversal = true, diameter = 0.1, height_ab = 0, isCircular = true, length = 200, nParallel = 1);
Modelica.Fluid.Pipes.StaticPipe tubo2(redeclare package Medium = Modelica.Media.Water.StandardWater,
allowFlowReversal = true, diameter = 0.1, height_ab = 0, isCircular = true, length = 200, nParallel = 1);
equation
connect(Pozzetto.ports[1], tubo1.port_a);
connect(Pompa.port_a, tubo1.port_b);
connect(Pompa.port_b, tubo2.port_a);
//connect( tubo1.port_b, tubo2.port_a);
connect(bacinella2.ports[1], tubo2.port_b);
annotation (uses(Modelica(version="3.2.3")));
end Pompaggio_modified;