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  • Users: j.doe
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  1. j.doe

    flow through resistivity cell

    Hi, I'm designing a cell to measure the electrical resistivity of a dielectric liquid during flow. I performed simulations and found that if i use a design with two electrode rings within an insulating pipe, it would require relatively large dimensions and thus a large volume if i want the cell...
  2. j.doe

    Designing a flow-through electrical resistivity cell

    Hi, I need to design a flow-through cell to measure the electrical resistivity of pressurized dielectric liquids when flowing across a tube. The main liquid I want to test is 134a which is thought to have a resistivity of around 10^12 ohm-m (in a static state). I want to design the cell so that...
  3. j.doe

    How to limit throttling/Joule-Thompson effect?

    Hi, I've designed a stainless steel cylinder cell to measure the electrical conductivity of R134a in liquid phase (under pressure). I'm a mechanical engineer and not a chemical engineer so i was wondering if you guys can kindly help me out with this. Initially, the procedure we were hoping to...
  4. j.doe

    What does liquid locking mean?

    Hi, I'm working on a project for a chemical producer to measure the electrical resistivity of a refrigerant in liquid form (under pressure). The chemists from the company included two valves at the top of the cell "to prevent liquid locks". Does anyone know what that means? Thanks in advance.
  5. j.doe

    Parallel plate conductivity cell design

    Hi, I am trying to design a parallel plate conductivity cell to use for a liquid dielectric. I need to minimize the liquid volume used. In the designs I've seen online (see example in attachment from paper DOI:10.1109/TDEI.2015.005468), the plates all protrude in the vertical axis and i was...
  6. j.doe

    Small valve sizes

    Hi, I was wondering how small a valve inlet can be made if the fluids to be inserted from the valves are dry nitrogen, kerosene or refined diesel(?) and r134a (5 bar saturation pressure). The temperature of the setup is 25C. Ideally, I'd like the inlet diameter to be 1mm or less for my...

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