It is mostly 3D printable and there is one brass/copper plate that needs to be machined in a simple way, definitely no problem for any university machine shop. We also now have identified pumps/tubing that work much better.

Hi Otmar, welcome to FBRC and the project, looking forward to working with you!

@kirk said in How should we control the centrifugal pumps? TRIAC/thyristor etc? Need help from controls/electrical people: It seems to work! At least enough for testing purposes. Here is a video: https://spectra.video/w/8xipM8aXnBkDXnu4kkRpqT Here is the code for this test: https://codeberg.org/FBRC/RFB-test-cell/src/commit/d10834bc7dd67736e708c9a33832a5602ab3ca28/firmware/FlowrateRampTest.ino

That's great! Do you have a link to one or know where we could procure one to test?

Stephen Hawes of Opulo has compiled some of their tools here: https://midscale.io/docs The AutoBOM one seems to be based on those workflows above and looks pretty interesting

Probably too far involved but this sort of approach could be cool, if it was constrained to manufacturable shapes: We introduce Fireshape, an open-source and automated shape optimization toolbox for the finite element software Firedrake. Fireshape is based on the moving mesh method and allows users with minimal shape optimization knowledge to tackle with ease challenging shape optimization problems constrained to partial differential equations (PDEs). https://link.springer.com/article/10.1007/s00158-020-02813-y?error=cookies_not_supported&code=2a7f63ae-6652-4af3-9b50-1ffb6e6985da

Reading the posts about the different pump designs, it makes more sense. More background reading to do. TY

@H4K1 no need to build the flow battery and test chemistry to help the project out! You can also build and test just with water, especially the larger cell we'll build. But if you can do CI/CD and firmware now then that's great! You'd be the only one on the project now with those capabilities, so a huge bonus. It will help make a framework that we'll benefit from as the project advances and hopefully save us some time as we improve and develop, so we can focus on what we're all best at and enjoy!

@kirk I hadn't spotted this years update to @tserong system - Thanks for the pointer! Bummer about redflow going under. We've gone for the riskier lump of lithium strapped to the outside of the house (Just as well Snug never has bushfi...oh). Can confirm that the #tasnetworks cablepi objects when we're off-grid. Reminds me I need to chase installer as our grid-tied inverter (on the essential load side) rightly objects to the 55.1Hz Sonnen runs at when in island mode - Want to decrease this.