Controlling Contaminant Reduction (Sarin) in a Zone Using ContamXPy: Two Approaches

[이수환]

Dear CONTAM community,

I am currently working on a project where I aim to reduce the contaminant level (Sarin) in a specific zone using ContamXPy. I have attempted two different approaches to achieve this, but I encountered some issues that I hope you can help me resolve:

1. Using a sink in ContamW:

• I configured a sink in ContamW, and it successfully reduces the Sarin concentration in the zone as expected. I also confirmed that this works correctly in ContamXPy.

• However, I am unable to control the sink dynamically using ContamXPy. Specifically, I cannot find a way to set or get the sink parameters programmatically. While I can increase the Sarin concentration using the setZoneAddMass function, I haven’t found a corresponding method to control or manipulate the sink parameters via ContamXPy.

2. Using setZoneAddMass to reduce Sarin:

• When using setZoneAddMass, I can increase the Sarin concentration in a zone by setting a positive value for the concentration. However, I have not found an equivalent way to decrease the Sarin concentration directly through this method.

Is there a recommended way to dynamically control the sink parameters in ContamXPy, or an alternative method to reduce Sarin concentrations in a specific zone programmatically?

I would greatly appreciate any guidance or insights on this matter.

Thanks to everyone’s help, I am making progress step by step. Thank you so much!

[William Dols]

This could be done using controls.
You can apply controls to source/sinks and set their values via the API, i.e., via setInputControlValue().
You could also utilize filtration which could be controlled by adjusting airflow through the filter.
Again, airflows could be activated/adjusted via controls or by setting Simple AHS flows depending on where the filters are located.

- Stuart

[이수환]

Thank you very much for your kind response.
Following your advice, I have revised my project to use the setInputControlValue function and tested it.

To control the Sarin concentration at four different points within a single room, I divided the room into four zones.
In CONTAMW, I created separate source/sink elements for each zone and connected them to the control feature, linking them to modify input values accordingly.

To control this project dynamically over time using CONTAMXpy, I performed doSimStep and attempted to adjust the input control value at 30,000 seconds using setInputControlValue.
However, instead of changing at the designated time, the value starts to change slightly after 20,000 seconds.

I would like to know if I have misconfigured the control connections or if I am incorrectly using the CONTAMXpy functions.
I have attached the modified code and relevant screenshots for reference.

Thank you in advance for your help!

• NSC_IOT: Project file
• test_OneZoneWtmCtm_sw.py: Python source code for CONTAMXpy
• cxResults.py: Modified existing code for output processing
• contamw_NSC_IOT_prj.png: Project screenshot
• multizone_result.png: CONTAMXpy results

2025년 1월 14일 화요일 오전 4시 29분 56초 UTC+9에 William Dols님이 작성:

[Dols, William Stuart (Fed)]

I can’t really spend time debugging your python code.

Add report controls to your CONTAM PRJ so you can see what values you are setting.

 

 

 

- Stuart