HeatExchangerシミュレーションが機能しない、エラーメッセージを理解できない

Question

プレート熱交換器モデルをシミュレートしたい場合、Modelica-Fluid-Libraryでdefault-Versionを使用します。デフォルトバージョンを指定するために、VDIWärmeatlas2006、Mm1に準拠して、熱伝達（ヌッセルトなど）と圧力損失に関する必要なパラメータと式をすべて作成します。私は長い間、すべての間違いを見つけて修正しようとしましたが、最終的に私は「死点」になります。

エラー最後のメッセージは以下の通りであった。

Check of Fluid_Test1_PHE_Temp7.Examples.HeatExchanger.HeatExchangerSimulation: 
Error: The model is not well-posed. 
The model has 
    484 
scalar unknowns and 
    480 
scalar equations. 
Using the given settings of the parameters, the difference could be reduced to 
    4 
Error: The following parameters don't have any value: 
    HEX.pipe_1.diameter 
    HEX.pipe_2.diameter 

Warning: The following inputs lack binding equations: 
    HEX.pipe_1.heatTransfer.roughnesses 
    HEX.pipe_2.heatTransfer.roughnesses 

Error: The problem is structurally singular: 
It has 488 scalar unknowns and 484 scalar equations. 
    The Real part has 456 unknowns and 452 equations. 
    The Integer part has 32 unknowns and 32 equations. 
    The Boolean part has 0 unknowns and 0 equations. 
    The String part has 0 unknowns and 0 equations. 
Attempting to further localize singularity. 

The model has the same number of unknowns and equations. 
Attempting to further localize singularity. 

The model has the same number of unknowns and equations. 
Attempting to further localize singularity. 

The model has the same number of unknowns and equations. 
The model has the same number of unknowns and equations. 
Note: The input connector p of HEX.pipe_1.mediums[1] is not connected from the outside. 
It is likely that it should have been connected, and recursive check will assume this. 
The missing connection is a likely cause of errors in the model. 
Note: The input connector h of HEX.pipe_1.mediums[1] is not connected from the outside. 
It is likely that it should have been connected, and recursive check will assume this. 
The missing connection is a likely cause of errors in the model. 
The model has the same number of unknowns and equations. 
Note: The input connector p of HEX.pipe_1.mediums[2] is not connected from the outside. 
It is likely that it should have been connected, and recursive check will assume this. 
The missing connection is a likely cause of errors in the model. 
Note: The input connector h of HEX.pipe_1.mediums[2] is not connected from the outside. 
It is likely that it should have been connected, and recursive check will assume this. 
The missing connection is a likely cause of errors in the model. 
The model has the same number of unknowns and equations. 
The model Fluid_Test1_PHE_Temp7.Examples.HeatExchanger.HeatExchangerSimulation component HEX.pipe_1 is structurally singular. 
when assuming the most generic outside couplings to all the flow variables of its connectors 
and that non-physical connectors will impose suitable constraints. 
The reported problems with connections are the likely cause of the singularity. 
Singularity of Fluid_Test1_PHE_Temp7.Examples.HeatExchanger.HeatExchangerSimulation is in the component HEX.pipe_1, class Fluid_Test1_PHE_Temp7.Pipes.DynamicPipe. 
ERROR: 3 errors were found 
WARNING: 1 warning was issued 

月の誰かが私を助けることができますか？メールでモデルを誰かに送ってチェックさせることもできます。

が ゲオルク

Answer 1

に挨拶私はあなたのモデルにアクセスすることはできませんが、エラーメッセージは、問題が（配列です）HEX.pipe_1.mediumsへの接続であることを示しています。彼らは（適切に）接続されていないように見えます。

これは問題ではないと思われる理由がありますか？

また、さらに試験を行う前に、HEX.pipe_1とHEX.pipe_2に（ゼロでない）直径を指定し、熱伝達の粗さ成分のための「結合式」を提供することを強くお勧めしますモデル。このような問題は、他の懸念を「隠す」かもしれない。

それが役立つかどうか教えてください。