The verification of a valve model

[SKDHFK755]

I need help for the verification of a valve model. I do not know how to verify that the valve model is accurate in the reality. The code is below.
Discussion.py

[fwitte]

Hi @SKDHFK755,

can you post a minimal working example here with some testing data included? Otherwise I cannot run your code. Do you just want to include this equation in your tespy model?

$$\Delta p = \frac{59.2 \cdot \dot V^2}{\rho \cdot \pi ^ 2 \cdot \left(1 - \left(1 - \alpha \right) ^ {0.6}\right)^2}$$

[SKDHFK755]

OK，there are several statistics I will send later. I am confused about how to use these statistics to clarify my model is accurate or not. Thank you！

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---Original--- From: "Francesco ***@***.***> Date: Fri, Oct 31, 2025 15:08 PM To: ***@***.***>; Cc: ***@***.******@***.***>; Subject: Re: [oemof/tespy] The verification of a valve model (Discussion #822) Hi @SKDHFK755, can you post a minimal working example here with some testing data included? Otherwise I cannot run your code. Do you just want to include this equation in your tespy model? $$\Delta p = \frac{59.2 \cdot \dot V^2}{\rho \cdot \pi ^ 2 \cdot \left(1 - \left(1 - \alpha \right) ^ {0.6}\right)^2}$$ — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: ***@***.***>

[fwitte]

It depends on what information you have, as there might be different ways to calculate/characterize the pressure drop to flow relation through a valve, e.g.

• https://en.wikipedia.org/wiki/Flow_coefficient
• This thing where I only know the German form: https://de.wikipedia.org/wiki/Druckverlustbeiwert (it is essentially the Darcy Weißbach equation with a constant darcy friction factor $f_D$: https://en.wikipedia.org/wiki/Darcy%E2%80%93Weisbach_equation)

[SKDHFK755]

Hello, the statistics is in the addition file, the code can show the formula image in the three dimension space, the additional file is the working data. I want to use these two things or extra ways to prove the formula is right.
分析1.xlsx

[fwitte]

Hi,

unfortunately I cannot read the header columns of the excel file. It would be nice, if you could just post here (and not as files to download)

• a full English version
• a minimal version of what you are trying to accomplish
• a minimal version of the dataset, that just plugs into that

Otherwise it is a bit too much for me to do in my free time. Or, you can pay me to do that work, in that case please write me an email :).

Best

Francesco