Comment on DIY experimental Redox Flow Battery kit

• icelimit@lemmy.ml ⁨1⁩ ⁨week⁩ ago

  Plastic tubing wears out because its continuously deformed. Also the backflow

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  • Rolive@discuss.tchncs.de ⁨1⁩ ⁨week⁩ ago

    Hmm… I use cheapass silicone tubing, 5mm ID 7mm OD and wear hasn’t been an issue. Perhaps you compress the tube too much. The tube should be held shut so that no liquid flows backwards but also not compressed so much that it wears the tubing out. Your pump should have a variable tensioner on it.

    Perhaps also you don’t have enough rollers. At least one roller needs to be in full contact with the tubing (compressing) so that there is no backflow.

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    • icelimit@lemmy.ml ⁨1⁩ ⁨week⁩ ago

      Not sure what applications you have for your stack, but runtime of tubes is significant when considering operational lifetime in design.

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      • Rolive@discuss.tchncs.de ⁨1⁩ ⁨week⁩ ago

        Hmm. I have a 12 channel peristaltic pump at the moment that is meant for watering plants. Meaning they have a lot of downtime so the tubes are compressed for quite some time at the same spot.

        Ignore the yellow rollers in the image below, that was experimental. The final version has 3 all metal rollers so the tube is always compressed at one point.

        It’s an entirely custom design from scratch and haven’t uploaded the model to a 3D printing website yet but plan on doing so.

        Image

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