我在为太阳能热电厂的项目平衡闭合热流体回路中的压力时遇到了一些困难，因此我决定制作一个简单的系统来消除一些错误。下面是两个储罐之间的简单循环，使用MSL的水介质正确工作：
model TankTestfluid
Modelica.Fluid.Pipes.StaticPipe pipe(
p_a_start=system.p_ambient,
length=20,
height_ab=-20,
redeclare package Medium = Medium,
diameter=0.1) annotation (Placement(transformation(
extent={{-10,-10},{10,10}},
rotation=-90,
origin={50,10})));
Modelica.Fluid.Pipes.StaticPipe pipe1(
p_a_start=system.p_ambient,
length=20,
height_ab=20,
redeclare package Medium = Medium,
diameter=0.1) annotation (Placement(transformation(
extent={{-10,-10},{10,10}},
rotation=90,
origin={-50,10})));
Modelica.Fluid.Machines.ControlledPump pump(
redeclare package Medium = Medium,
p_a_nominal=system.p_ambient,
m_flow_nominal=100,
p_b_nominal=200000) annotation (Placement(transformation(
extent={{-10,-10},{10,10}},
rotation=90,
origin={-50,-42})));
inner Modelica.Fluid.System system
annotation (Placement(transformation(extent={{-80,60},{-60,80}})));
Modelica.Fluid.Vessels.OpenTank tank1(
height=10,
crossArea=3,
redeclare package Medium = Medium,
nPorts=2,
portsData={Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter=0.05),
Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter=0.05)},
level_start=7,
use_portsData=false,
use_HeatTransfer=false,
T_start=363.15)
annotation (Placement(transformation(extent={{-12,-82},{28,-42}})));
Modelica.Fluid.Vessels.OpenTank tank2(
height=10,
crossArea=3,
nPorts=2,
redeclare package Medium = Medium,
portsData={Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter=0.05),
Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter=0.05)},
level_start=3,
use_portsData=false,
use_HeatTransfer=false,
T_start=353.15)
annotation (Placement(transformation(extent={{-20,30},{20,70}})));
// replaceable package Medium = SolarTherm.Media.MoltenSalt.MoltenSalt_base
// constrainedby Modelica.Media.Interfaces.PartialMedium annotation (
// __Dymola_choicesAllMatching=true);
replaceable package Medium = Modelica.Media.Water.StandardWater
constrainedby Modelica.Media.Interfaces.PartialMedium annotation (
__Dymola_choicesAllMatching=true);
equation
connect(pump.port_b, pipe1.port_a)
annotation (Line(points={{-50,-32},{-50,0}}, color={0,127,255}));
connect(pipe1.port_b, tank2.ports[1]) annotation (Line(points={{-50,20},{-28,20},
{-28,30},{-4,30}}, color={0,127,255}));
connect(tank2.ports[2], pipe.port_a) annotation (Line(points={{4,30},{26,30},{
26,20},{50,20}}, color={0,127,255}));
connect(pipe.port_b, tank1.ports[1]) annotation (Line(points={{50,0},{32,0},{32,
-82},{4,-82}}, color={0,127,255}));
connect(tank1.ports[2], pump.port_a) annotation (Line(points={{12,-82},{-22,-82},
{-22,-52},{-50,-52}}, color={0,127,255}));
annotation (uses(Modelica(version="3.2.2"), SolarTherm(version="0.2")));
end TankTestfluid;
现在，当我尝试使用与熔盐介质完全相同的模型时，我收到错误。我正在使用的熔盐介质可以在（在Alberto分公司）找到：
https://github.com/SolarTherm/SolarTherm.git
我做的唯一区别（除了介质）是起始温度（所以盐仍然是液体）：
model MoltenSaltTest
Modelica.Fluid.Pipes.StaticPipe pipe(
p_a_start=system.p_ambient,
length=20,
height_ab=-20,
redeclare package Medium = Medium,
diameter=0.1) annotation (Placement(transformation(
extent={{-10,-10},{10,10}},
rotation=-90,
origin={50,10})));
Modelica.Fluid.Pipes.StaticPipe pipe1(
p_a_start=system.p_ambient,
length=20,
height_ab=20,
redeclare package Medium = Medium,
diameter=0.1) annotation (Placement(transformation(
extent={{-10,-10},{10,10}},
rotation=90,
origin={-50,10})));
Modelica.Fluid.Machines.ControlledPump pump(
redeclare package Medium = Medium,
p_a_nominal=system.p_ambient,
T_start=673.15,
p_b_nominal=200000,
m_flow_nominal=10) annotation (Placement(transformation(
extent={{-10,-10},{10,10}},
rotation=90,
origin={-50,-42})));
inner Modelica.Fluid.System system
annotation (Placement(transformation(extent={{-80,60},{-60,80}})));
Modelica.Fluid.Vessels.OpenTank tank1(
height=10,
crossArea=3,
redeclare package Medium = Medium,
nPorts=2,
portsData={Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter=0.05),
Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter=0.05)},
level_start=7,
use_portsData=false,
use_HeatTransfer=false,
T_start=673.15)
annotation (Placement(transformation(extent={{-12,-82},{28,-42}})));
Modelica.Fluid.Vessels.OpenTank tank2(
height=10,
crossArea=3,
nPorts=2,
redeclare package Medium = Medium,
portsData={Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter=0.05),
Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(diameter=0.05)},
level_start=3,
use_portsData=false,
use_HeatTransfer=false,
T_start=573.15)
annotation (Placement(transformation(extent={{-20,30},{20,70}})));
replaceable package Medium = SolarTherm.Media.MoltenSalt.MoltenSalt_base
constrainedby Modelica.Media.Interfaces.PartialMedium annotation (
__Dymola_choicesAllMatching=true);
// replaceable package Medium = Modelica.Media.Water.StandardWater
// constrainedby Modelica.Media.Interfaces.PartialMedium annotation (
// __Dymola_choicesAllMatching=true);
equation
connect(pump.port_b, pipe1.port_a)
annotation (Line(points={{-50,-32},{-50,0}}, color={0,127,255}));
connect(pipe1.port_b, tank2.ports[1]) annotation (Line(points={{-50,20},{-28,20},
{-28,30},{-4,30}}, color={0,127,255}));
connect(tank2.ports[2], pipe.port_a) annotation (Line(points={{4,30},{26,30},{
26,20},{50,20}}, color={0,127,255}));
connect(pipe.port_b, tank1.ports[1]) annotation (Line(points={{50,0},{32,0},{32,
-82},{4,-82}}, color={0,127,255}));
connect(tank1.ports[2], pump.port_a) annotation (Line(points={{12,-82},{-22,-82},
{-22,-52},{-50,-52}}, color={0,127,255}));
annotation (uses(Modelica(version="3.2.2"), SolarTherm(version="0.2")));
end MoltenSaltTest;
现在，无论我使用什么样的泵质量流量，我都无法填满“顶部”水箱，事实上，在设定质量流量时，顶部水箱排水速度越快。
这里可能是错误的来源是什么？