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  1. asv80

    installation cost for plate heat exchangers and shell&tube

    Montemayor, I would be interested to know the example you have for any case of comparison between PHE and S&Ts. Thank you.
  2. asv80

    Steam Riser

    katmar: Thanks for the information.
  3. asv80

    Steam Riser

    Can you tell me what is a steam riser - function and suppliers? Thanks
  4. asv80

    Horizontal ammonia vapor drums

    Montemayor: Thank you very much for this piece of advice. I truly understand and agree with every word of yours. It may well have been brought out from my posts that I am not familiar with the design process. In the absence of immediate assistance by way of some experineced person who may...
  5. asv80

    Horizontal ammonia vapor drums

    Montemayor: Thanks for the answer. I can now appreciate the nature of the problem better. I realize that the process requirement is to store extra quanity of liquid and supply it when need arises. As such I do not have information on the fluctuations that might occur. My thought was that in...
  6. asv80

    Sizing feed surge drum

    Another use for the surge tank is to use it as a storge tank during cleaning of the exchanger. ASV80
  7. asv80

    Sizing feed surge drum

    MortenA: We have a heat exchanger using liquid ammonia and need a surge drum to ensure there is always supply to the exchanger. The flow rate to the exchanger of liquid ammonia is ~ 4000 lb/h at -10°F and there is no vaporization of ammonia any time. It is only going to be a liquid surge tank...
  8. asv80

    Sizing feed surge drum

    TD2K: I am interested in knowing the procedure to design a similar application - a surge drum to even out flucutations. Are there guidelines to the residence time? If I assume a L/D of 4 and find the D to hold the volume more than the residence time, would it make sense? Thanks. ASV80
  9. asv80

    Horizontal ammonia vapor drums

    I now have a question for the surge tank design when there is only a liquid phase in the system. I have a flow rate of liquid NH3 at about 4000 lb/h and -10°F. I need to design a surge tank for this. Are there any methods to do this? Is it right to size a tank for a specified specific holding...
  10. asv80

    Horizontal ammonia vapor drums

    NghiaPP, I agree with you, a kettle reboiler type will be suitable for this kind of application. But, the means of adding only an extra drum to the H/X that is usually being made/stocked seemed to outweigh newer designs. However, I will keep in mind your suggestion in future cases where there...
  11. asv80

    Horizontal ammonia vapor drums

    TD2K, I appreciate you for offering to send the paper. Please send it to mechengr80@yahoo.com. Thanks in advance.
  12. asv80

    Horizontal ammonia vapor drums

    Mbeychok: Yes I would think so. The design required is similar to a one already existing system with a horizontal drum and they want a horizontal drum in this case too. If you may elaborate the design it would help (both horizontal and vertical). Thanls.
  13. asv80

    Horizontal ammonia vapor drums

    Thanks for the relationship and the references. What Montemayor assumed is exactly what is expected in the design. Do I arrive at the diameter of the drum assuming as a pipe flow in which the maximum velocity is Vmax, determine diameter for this velocity. Then determine a length from an assumed...
  14. asv80

    Horizontal ammonia vapor drums

    Montemayor, I am supposed to come up with the size of the unit - diameter, length, riser spacing, etc. I am involved with sizing a heat exchanger that uses ammonia as working fluid. So I need the drum to act as a vapor/surge drum. I hope this might help. If you need more clarifications please...
  15. asv80

    Horizontal ammonia vapor drums

    Can someone send me the design procedure or calculations to desing a horizontal ammonia vapor drum. I know the flow rate of ammonia, density of the vapor and liquid. But do not have any reference material with me that would describe the procedure. Thanks ASV

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