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Recent content by UmeshMathur

  1. UmeshMathur

    Cooling Water System

    Regarding the method of calculating the hydraulic network, I have actually programmed the Hardy-Cross method, which is a "beginner's" method, not too accurate because of the restrictive assumptions. This can be implemented in Excel (very tedious even for small problems; besides the spreadsheet...
  2. UmeshMathur

    Fluidized bed coating process

    For large diameter particles (such as your seeds) where fluidization is not stable, I would look into spouted beds, which have been field-proven in such applications for over 3 decades. There is a description of this technique in Perry. For design details, such as maximum spoutable bed depth...
  3. UmeshMathur

    Cooling Water System

    If you want good flow regulation, a butterfly valve is generally a poor choice. The flow characteristics are just not suited to such a task. That's why one should specify a control valve if you want really close regulation. A better choice than the butterfly is a globe valve for reasonably...
  4. UmeshMathur

    Deethaniser simulation

    Well, this time I uploaded it to Engineering.com Hope it shows up for you. Umesh Mathur
  5. UmeshMathur

    Deethaniser simulation

    Sorry, the report did not get uploaded properly. Here it is:
  6. UmeshMathur

    Deethaniser simulation

    fifi121: Since you cannot condense methane, you must have an overhead vapor leaving the accumulator. The overhead liquid distillate would need to be a draw from the accumulator. I ran a simple simulation and have attached the report. This simulation contains many assumptions, such as feed...
  7. UmeshMathur

    Centrifugal Blower Performance Curves

    bduane: If you're still interested, please confirm and I'll post a generic method on how to use the vendor's polytropic head and efficiency curves for ANY gas.
  8. UmeshMathur

    Plant Optimisation

    Several steps are required. I would summarize them as follows: (1) Expert analysis and fix-up of all basic regulatory controls - loop configuration logic, instruments, analyzers, loop tuning, valve performance and so forth. (2) Model-predictive, multivariable constrained control, referred to...
  9. UmeshMathur

    VLE for acetone-methanol and water

    You need to study the basics of VLE thermodynamics if you want to learn to do such calculations yourself. I suggest the following book by the recognized maestros in this field: "Computer Calculations for Vapor-Liquid and Liquid-Liquid Equilibria" by Prausnitz, et al (Prentice Hall, 1980)...
  10. UmeshMathur

    Counterflow heat exchanger model

    Hi, James: The best reference for step-by-step calculations of this type is: Hewitt, G. F., G. L. Shires, and T. R. Bott: "Process Heat Transfer", pp 275-285 (CRC Press, 1994). This is an encyclopedic work written by the leading authorities in the field, surely a worthy successor to Kern's...
  11. UmeshMathur

    VLE for acetone-methanol and water

    Have you checked the DECHEMA data book series for experimental VLE data? This is a voluminous set of books that lists all experimental data reported in the open literature that have been measured up to some date preceding the publication. These books are expensive, but most respectable...
  12. UmeshMathur

    Two-Phase Flow meter

    In my own experience, it is impossible to measure flow with any reliability in a two-phase flow line. The solution is to back up to upstream points until you find a segment where you have a single phase and do the measurement there. For example, in a furnace, measure the flow before the feed...
  13. UmeshMathur

    Distillation Column Feeds Mixing

    Hi, EmmanuelTop: Since the column pressure is 6.2 barg, the pressure downstream of both FCVs will be only slightly higher than this value, and could be calculated by any competent software package. Also, you need to be careful about static head effects in doing such calculations. You seem to...
  14. UmeshMathur

    Distillation Column Feeds Mixing

    I don't see any sketch, so it's not clear what the "Hot C4" and "Cold C4" streams mean.
  15. UmeshMathur

    Use of Fenske equation in steam stripping?

    LaSalle1940: Generally, the absorption equation is attributed both to Kremser (1930) and Souders-Brown (1932). You'll find it more easily if you use Kremser's name. A good plot of the Kremser-Souders-Brown equation is available in the 11th edition of GPSA's Engineering Data Book, Fig.19-48...
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