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  • Users: joisy
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  1. joisy

    Compressor Modelling via Hysys

    Hello, are there any specific issues with modelling of screw compressors? They have to be modelled as the centrifugal ones? thanks, Joisy
  2. joisy

    Foam Proportioners

    Well, I do not presume any problems with storage as the current foam(er) is more corrosive than one it's to be used. I mean operational problems with the foam/water proportioning devices?!
  3. joisy

    Foam Proportioners

    At our plant we used previously Fluorprotein Foam concentrate (CRODA) and we gonna change it over with AFFF. How do you think if it can cause a problem at the foam/water solution makers (the same concentration of foam concentrate & water - 3%) thanks, Joisy
  4. joisy

    Foam Proportioners

    At our plant we used previously Fluorprotein Foam concentrate (CRODA) and we gonnag change it over with AFFF. How do you think if it's a problem for the foam/water solution makers (the same concentration of foam concentrate & water - 3%) thanks, Joisy
  5. joisy

    Calculation Alarm/Trip Levels in 3-phase Flooded-Weir Separator

    Dear All, I've developed a software which calculates the alarm/trip levels (heights in meters) for the 3-phase Separators. They'r calculated on the base of the liquids' hold-up timings. (if the height of a particular level is less than some specific minimum value (meters), then it sets to this...
  6. joisy

    Petroleum Storage Tank Design

    Phex, Shell practices maybe very good but how can I see them being out of Shell? Maybe someone can send me them at joisy(nospam)@land.ru? thanks everyone I will keep you on track ;), Joisy
  7. joisy

    Low flow / high head requirements

    Dear All can you please advise me the vendor, which can supply the pump with 1 - 5 cub.m/h flow, 55 barg out and 2 m NPSHA. Assume that we should come up with positive displacement pump. thanks, Joisy
  8. joisy

    Petroleum Storage Tank Design

    Dear All, can you please advise me where (some practices ?) it's good to read about the cone bottoms' design (maybe with discharge well) for the Petroleum Storage Tanks. thanks, Joisy
  9. joisy

    Pump for oil/water sandy service

    Sounds good, but I'd like to get a reply here from such an expert. I was working with the several sales persons from the different pump suppliers and it looks like they do not understand my issues well. cheers, Joisy
  10. joisy

    Pump for oil/water sandy service

    Hello Everyone! I need to choose the pump for water/oil sandy service: the blend is to be pumped fro the atmospheric tank - 0.3 m static head to the vessel with 6 barg pressure. The blend contents the significant amount of sand - upto 3%. 80 cub.m/h is the required capacity can you please...
  11. joisy

    Pump for oil/water sandy service

    Hello Everyone! I need to choose the pump for water/oil sandy service: the blend is to be pumped fro the atmospheric tank - 0.3 m static head to the vessel with 6 barg pressure. The blend contents the significant amount of sand - upto 3%. 80 cub.m/h is the required capacity can you please...
  12. joisy

    Cyclone size and oil droplet size

    As far as I concern the cyclones are used for gas/solids separation - not liquid/liquid drops. Why not to use the simple two-phase separator - there are a lot of good manuals, and this will not require the droplet size (at least for the first approach).
  13. joisy

    Compressor' capacity calculations

    Thanks you very much, friends for your replies, but I'm already out of this problem. However this maybe useful either for me or for someone else... cheers, wish you a succesful year............
  14. joisy

    Pressure drop for fouled exchanger

    Once I was with the calc of dP in h-exchanger (I think you calculate tube side as well as I did) and we knew that this can be fouled after a while. We've just doubled the calculated dP for the clean x-changer to predict fouling effect. However the regular maintanance - twice a year is included...
  15. joisy

    Compressor Modelling via Hysys

    Hello All, can you please explain me the difference in modelling a compressor with & without characteristic curves thanks, Joisy
  16. joisy

    Pressure drop software

    If you assume no significant dP across the section you can use the same equation as for the liquids... cheers, Joisy
  17. joisy

    FAQ from Forum Tips

    If our respectable moderators will just collect all the tips (with answers) of each topic & make them available for the downloading at once - we can use it as the initial point for a preparation of FAQ. I think the database should let them to do it! E.g. convert it into MsAccess format, so as to...
  18. joisy

    FAQ from Forum Tips

    Hello all, I do have some idea here ). Can someone (maybe from eng-tips) collect all the threads, sort them out by the topic and make them as a FAQ file - set for the downloading. This will help many people not to ask the same questions many times. Howevere this must be experienced engineer as...
  19. joisy

    Adiabatic Mode of Steam Flowing through the valve

    Guys, and what tables have you used to define enthalpy? The ones I have have very inconsistent & give the significant mistakes during interpolation?! thanks, Joisy
  20. joisy

    Adiabatic Mode of Steam Flowing through the valve

    Assuming that the question is too difficult :) I will answer on it myself! It needs to define Enthalpy "H" of superheated steam at the inlet conditions (P1 & T1), and then find what temperature complies to "H" if the pressure is 389 kPa. hope this is correct & can be useful...

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