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  1. Latexman

    Cooling mixing tanks with a chiller, selecting chiller size

    If you have the analytical solution to the differential equation for your mixer (Kern, Perry’s), you can probably rearrange the equation (algebra) and plot the data (temperatures) versus time and obtain the actual U for your equipment. I did that long ago and included a least squares fit in a...
  2. Latexman

    Cooling mixing tanks with a chiller, selecting chiller size

    Do you have Kern’s Process Heat Transfer? His book shows the derivation of several equations for the differential equations of unsteady-state heat transfer. IIRC, your problem is documented there. They are also in Perry’s Handbook; the equations are presented here, not derived. Maybe if you...
  3. Latexman

    Steam Flow And Heating Time In Batch Reactor

    Do you have Kern’s Process Heat Transfer? His book shows the derivation of several equations for the solution of unsteady-state heat transfer differential equations. IIRC, your problem is documented there.
  4. Latexman

    Process Chill Water Loop for Multiple Machines with varying requirement.

    Agree with pierreick, a full hydraulic study by an experienced Engineer is called for. When the 3rd machine is designed for, take a look at making the supply and return lines into loops. With bidirectional flow the existing header size might work. Also agree, 2” header in one directional flow...
  5. Latexman

    Relieving temperature PSV

    I don’t think the OP’s fluid is steam. I assume relieving conditions = 7 bar_a and 287 K (14 C). OP, does the 287 K correspond to 7 bar_a?
  6. Latexman

    CDTP & Stamped SP help

    Can you post the P&ID, because that PRV is probably not protecting the TS of the exchanger? In my mind, there’s several questions that the P&ID should help answer.
  7. Latexman

    Medium for calculation of PSV relief rate

    It’s not exactly the way I was taught. Close, but not exactly. Using the “worst case scenario“ and actual medium properties, I calculate the perfect nozzle (orifice) area needed for the sizing flow. Then, I get a real nozzle area by dividing by the certified flow coefficient of the PSV the...
  8. Latexman

    North Korean Ship Fails/Capsizes at Launch in Front of Kim

    I wonder how many will get shot over this?
  9. Latexman

    Speed of flash steam formation

    I’m curious about what kind of process it is that this is even important.
  10. Latexman

    Cooling Tower Blow Down Water Pipe Material

    How about PVC or CPVC?
  11. Latexman

    How do professional estimators deal with scope creep in real-world projects?

    The engineers, PM, and estimators were one and the same. We wore many hats!
  12. Latexman

    How do professional estimators deal with scope creep in real-world projects?

    On controlling project cost, a wise, old Project Manager once told me, "there's a time in a project where you have to shoot the Engineers, and begin construction".
  13. Latexman

    static mixer

    shvet and Ed align with my thinking. Option B mixes better. What is the cost of failure? Is a coating really needed, or will SS be okay? IIRC, standard MOC in static mixers is SS.
  14. Latexman

    static mixer

    What is being mixed? More details; better answer.
  15. Latexman

    What causes PRV blowdown?

    Mojojojo69, Take a deep dive into the “huddling chamber” of a PSV. Use AI, and there are some YouTube videos out there. Any questions, come back here.
  16. Latexman

    Liquid outlet pressure concept

    I would say it like this, just outside the end of the line there will be atmospheric pressure.
  17. Latexman

    Non-Newtonian fluid ratholing

    Is there a basic problem? High dP, need more flow, need more heat transfer, burnt product at the wall, or, as stated, you are just coming up to speed on your process? Those articles are great. I got copies (poor ones) long ago from my megaCorp's library. I recommend calling ChE magazine and...
  18. Latexman

    Non-Newtonian fluid ratholing

    I’m familiar with rat-holing in solids/powder flow, but not in non-Newtonian fluid flow. Can you provide a reference?
  19. Latexman

    Steam piping

    CS is fine.
  20. Latexman

    Sizing a seal pot that also acts as an overflow

    A P&ID would have been more informative. Why is this seal pot needed?

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