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  1. choack

    Understanding centrifugal fan curve

    I usually seen fan or compressor curves in Nm3/hr. But if its actual, usually its the suction flow.
  2. choack

    Pressure Drop in a FILTER VESSEL

    Hi, I'm not an expert in filter vessel with polymer powder but I can suggest just getting from brochure from vendor that is nearest to your application. Then add a generous amount of margin. You may contact vendors directly for more precise pressure drop vs flow curve. SAMPLE...
  3. choack

    N2 Gas purging calculation

    Refer to AGA Purging Principles and Practices
  4. choack

    Is PSV required here?

    I supposed that the vent of this "atmospheric equipment" be routed to a safe location. Normal purging of 200 kg/hr would be detrimental indoor. As georgeverghese mentioned, please make sure to do a backpressure backwards calculation with CV failure flowrate. Do not account for the closing of...
  5. choack

    flow rate of a pump

    1 horsepower = 0.746 kilowatt (NOT kilowatt-hour)
  6. choack

    Fire Relief for a Centrifugal Pump

    I agree that there is no code that dictates piping be protected against fire. But on my experience, to be conservative on relief load, pipings are accounted to the PSV on the upstream drum of the pump.
  7. choack

    Gas Turbine Drain Pressure

    Hi, I just want to ask if there is a chance to have a pressurized gas exiting drain lines of gas turbines? I'm suspecting turbine casing and the enclosure skid drains. Christopher Kenneth Choa
  8. choack

    Compressor Coupling Hubs

    Just want to ask typically how much coupling hubs a compressor have? A typical gas turbine rated about 20+MW. Nany Thanks. Christopher Kenneth Choa
  9. choack

    Shell Tellus ISO 360 and Aeroshell ISO 560

    I would like to ask where to find molecular weights and latent heat of vaporization of complex lube oils (Shell Tellus ISO 360 and Aeroshell ISO 560). I would also like to ask if one can simulate them in HYSYS/UNISIM? Christopher Kenneth Choa
  10. choack

    DP Transmitter

    What if I don't do not have the lighter fluid (oil) during start up... Will I have inaccurate reading? Christopher Kenneth Choa
  11. choack

    DP Transmitter

    I think radar is possible alternative, but I really do want to stick with dP (cheaper). Christopher Kenneth Choa
  12. choack

    DP Transmitter

    @danw2: How will the transmitter know the percentages? I know that it only measure pressure difference, how come it can know the percentage? Is the formula like this? dP = x1*rho1*g*h1 + (1-x1)*rho2*g*h2 where x1 and x2 are mass fraction. However, there is 2 unknowns... x1 and h1... And...
  13. choack

    DP Transmitter

    Can DP transmitter read interface level? Christopher Kenneth Choa
  14. choack

    HYSYS Simulation

    HI, I done simulation with ELECTROLYTE NRTL, with the electrolytes like H+, OH- and others defined as composition. I am just wondering why in my simulation run, none of them have values on the composition workbook. Are they just intermittent species which HYSYS consider them non existing when...
  15. choack

    HYSYS Simulation

    Thanks TD2K, I think I will add several reactions in the package environment first. Christopher Kenneth Choa
  16. choack

    HYSYS Simulation

    Thanks MortenA for the reply. But I do want to clarify things. The reaction is a reversible reaction by double displacement only. Should I still have a reactor even if I'm building a plant without reactor? Many Thanks for the reply. Christopher Kenneth Choa
  17. choack

    Friction in Exhaust Stack

    Its from a compressor system. So from a burner. Christopher Kenneth Choa
  18. choack

    HYSYS Simulation

    Hi, I'm definitely new to HYSYS and other process simulation tools. I just have a question in HYSYS.. If I do want a sour water stripper with a caustic injection on it (this will entails having an equilibriun reaction between the NaOh and other components inside the stripper), should I still...
  19. choack

    ADIP Process Meaning

    Thank poli60. :) Christopher Kenneth Choa
  20. choack

    ADIP Process Meaning

    I know its a Shell license design, however, is there any meaning or logic why its ADIP? Thanks! Christopher Kenneth Choa

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