dev | Cathodic Protection | Calculations

[vamseeachanta]

Perform CP Calculations sacrificial anode CP calculations:

Final result required is Weight of Anode required. For detailed methodology for sacrificial anode calculations, see below: https://github.com/vamseeachanta/digitalmodel/blob/oct/docs/cathodic_protection/sacrificial_anode.md

For other general CP details, see below: https://github.com/vamseeachanta/digitalmodel/blob/oct/docs/cathodic_protection/literature.md

[vamseeachanta]

@mpydah FYI

[vamseeachanta]

Dear team, basic structure for the code added so far is below. https://github.com/vamseeachanta/digitalmodel/pull/38/files

@mpydah , @saiachanta2728 @samdansk2 @unixwave Please ask questions if any in below comment box so I can respond.

[vamseeachanta]

@samdansk2 Please work in this branch. Added calculations to the same branch. https://github.com/vamseeachanta/digitalmodel/tree/cp_ss Dev:

• create virtual environment
• create a test_cathodic_protection.py to read in cathodic_protection.yml
• add calculations step by step. See below procedure for guidance:
• https://github.com/vamseeachanta/digitalmodel/blob/cp_ss/docs/cathodic_protection/cp_calculation.png

[samdansk2]

@vamseeachanta Hello sir , hope you are doing well , As you said

• Created a virtual environment using conda
• studied the excel calculation file , got know about each and every calculation exists in the file but to transform this into programming part and testing , please schedule a meeting sir , Thankyou .

[samdansk2]

@vamseeachanta

Hello sir , hope you are doing good ,

• As you said wrote a code for current_density , please see it
• i have some doubts to clarify
• schedule a meet today Thankyou .

[samdansk2]

@vamseeachanta hello sir ,

• Also wrote code for current-demand calculation
• please see it
• a little bit confusion in debugging procedure and driving the inputs from input file
• please schedule a meet today ,
• thankyou

[samdansk2]

@vamseeachanta After opening engine file and input yaml file , when I press 12 key Cathodic_protection.py file has not opened sir. Whyy ?

[vamseeachanta]

@samdansk2. Hit F12 in the engine file on any code command i.e where there is a function defined. Hit F12 again. keep playing with it to get a hang of it. See below: https://code.visualstudio.com/docs/editor/editingevolved#:~:text=in%20the%20editor.-,Go%20to%20Definition,a%20symbol%20by%20pressing%20F12.&text=Tip%3A%20You%20can%20jump%20to,with%20Ctrl%2BAlt%2BClick.

[samdansk2]

@vamseeachanta after debugging test_cathodic_protection file , when i try to debug the cathodic_protection calculation file using debug toolbar option continue (f5) , but debugging is not working sir , nothing comes in call stack field i am attaching the image below , please see it sir

[samdansk2]

[vamseeachanta]

@samdansk2 , You are trying to run cathodic_protection.py. The code has class and class functions but nothing is ever called in the file.

So running cathodic_protection.py, will only read the file and its functions. It may stop near a function definition if you put abreakpoint. Anything inside function, nothing will happen and no breakpoints will stop. So, you have to call a code to run. The test_basic_cathodic_protection.py will create entry into the code. This is the summary of the problem.

[samdansk2]

@vamseeachanta hello sir , Again i started from beginning it is giving one error please see it in below image Is it beacause of we install package in wrong directory ( python -m pip install e .) that i have two in desktop digitalmodel and digitalmodel-1

Note : when you said why two digitalmodel repos while we are in a meet I have deleted previous one digitalmodel and kept latest one digitalmodel-1

[samdansk2]

[vamseeachanta]

sometimes you may need to restart the program/computer. Or there is a genuine reason. We will try on my computer next time..

[samdansk2]

@vamseeachanta my doubt is real sir , we installed digitalmodel package in wrong old repository , now i have installed using same command ( python -m pip install - e. ) in present working folder ( repo ) it has worked for me . thankyou.

[samdansk2]

@vamseeachanta Hello sir , hope you are doing well ,

• As you said , corrected the logic in current_demand method .
• also , wrote code for anode initial check ,
• please see it sir ,
• thankyou

[vamseeachanta]

@samdansk2 , looks good. Continue the rest of the code. Also track the values in the workbook (350106-SC-EN-022-SD-000229-CTR2-0001-Rev0 CP Calculation vs. programming.xls) and fill in the below columns:

This way, we know how accurate our program is when compared against the workbook.

PS: Do let me know if you are stuck.

[samdansk2]

@vamseeachanta everything is done sir , only one calculation is pending , seawater_resistivity calculation , we should discuss about it , thankyou .

[vamseeachanta]

Progress:

• Resolved the differences between Excel and program.
  • Excel number was rounded off and caused matching issues.
• Outputs should be more compatible data types for Yaml.
• Round off numbers appropriately.

[vamseeachanta]

Way forward:

• seawater_resistivity_calculation

  • find reference and specify in yml input file (done)
  • options: (Done)
  • float value.. use it
  • csv: calculate resistivity using temperature and salinity

• save all results to standard .csv file (done)

• Perform sensitivity analysis with different inputs (done)

• Show how to utilize visualizations to demonstrate analysis outputs (?)

• Troubleshoot numpy output discrepancy. (Done)

  • VA versions: python 3.11.0 ; numpy 1.26.3 ; pyyaml - 6.0.1
  • SS Versions: python 3.12.3 ; numpy 1.26.4 ; pyyaml - 6.0.1
  • Run in your computer and show?

• fix count vs. mass error (Done)

[vamseeachanta]

• Prepare comprehensive outputs for cathodic protection calculation (VA)
• Review sensitivity analysis outputs and the correctness (VA)
• Make input file and common calculation (between ship and pipeline) consistent (VA)
• Write test (SS)
  • reference test: https://github.com/vamseeachanta/digitalmodel/blob/cp_ss/src/digitalmodel/tests/no_license/test_code_dnvrph103_circular.py
  • sample test completed
  • Complete the entire test.