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  1. TXiceman

    Supply Chain Ethics

    I would not try this as it may well be a conflict of interest. Since you work fro Company A, you should address this with their Code of Business Conduct and Ethics committee. If they give a thumbs up, you ae covered...otherwise no. Ken Ken KE5DFR
  2. TXiceman

    Kettle Reboiler Vapor Space Calcs

    HTRI does a bad job of calculating vapor separation velocities and disengagement space. Stokes Eq does a good job. Ken KE5DFR
  3. TXiceman

    Over - design

    Add the 15 or 20 % over design tot he calculated heat exchanger surface. Then go back and recalculate the heat transfer cofficient based on the new surface area. The fouling overdesign is taken care of in the fouling factor as opposed to clean tubes. Ken Ken KE5DFR
  4. TXiceman

    chilled water coil: steel nipple brazed to copper coil header

    This is pretty common practice for water coils in the HVAC industry. If a customer insist, tey can generally be drovided with a dielectric flange set. Ken Ken KE5DFR
  5. TXiceman

    Trying to find a source for cartridge heaters?

    You might check Delta Mfg. in Tulsa, OK. Ken KE5DFR
  6. TXiceman

    AC for swimming pool area

    Plan to put in Heresite coat coils or equal. Remember that the A/C load is in tow parts, the sensible load and the latent load. The A/C will dehumidify. Ken Ken KE5DFR
  7. TXiceman

    T&G Flange vs Standard RF Flange in Refrigeration

    The refrigeration flanges are a unique design to the refrigeration industry. They are designed to provide a higher clamping force than the standard ANSI flanges. I do not know how old your equipment is, but the trend has been to get totally away from flanges as much as possible and go with...
  8. TXiceman

    low temp screw compressors

    How long have the machines been operating? What type oil is being used and is it suitable for low temp applications? Have you aded any oil to the compressors? Ken Ken KE5DFR
  9. TXiceman

    attic ventilatoion

    In addition to the "turbines" you will need adequate eve vents to allow air to move through the attic. You want to rid the attic of heat and humidity. The approach to attic ventilation varies abit with regard to your location. Do you have cold winters or hot summers to deal with? Ken Ken...
  10. TXiceman

    Office Engineers Doing Field Work

    As an engineer that has spent a lot of time in the field troubleshooting, I can say the experience you get from field work can not be valued. As a result of the field experience is love to get to do some trouble shooting, get my hands dirt and work with the technicians. If you are willing to...
  11. TXiceman

    Vane Postion and load relationship

    The vane position and capacity or power are not direclty proportional to each other. The control action will be much like you described. Ken Ken KE5DFR
  12. TXiceman

    Air Scrubbers for Sour Gas

    To scrub H2S out of the air you will need to look into some sort of a scrubber using a checmical process and possibly carbon beds. It won't be cheap. Ken Ken KE5DFR
  13. TXiceman

    Chiller vs Direct Expansion system question

    There is not a right answer that fits every case. You need to review the operating cost, longivity of equipment, how it is operated, installation cost, first cost, maintenance cost and available space to install. Ken KE5DFR
  14. TXiceman

    Heating /cooling system sizes for residential building

    The old cenventional number was 500 BTUH/Ft2(floor space). Well insulated and shaded...maybe 400. Best to run the J calculations. Ken KE5DFR
  15. TXiceman

    Reciprocating Expander

    You might contact Howden Ltd in Glasgow, Scotland. They had done some work on using oil injected screws in expander service. ken Ken KE5DFR
  16. TXiceman

    Cooling Tower Tonnage

    One of the most confusing things to "outsiders" in this industry is the rating of cooling towers and evaporative condensers, it even confuses a lot of the so called engineers as well. I wish that the manufactures would do away with the TON rating system and strictly rate them in total heat of...
  17. TXiceman

    NPT fittings in an AC system?

    Who in the world would use an NPT connection on a R-134a unit? Since they are already there, you need to clean them well and coat them with A Loctite product specifically for refrigerant service. It will hold pretty well and can be heated to remove the plug later. Ken Ken KE5DFR
  18. TXiceman

    30 ton, single phase chiller

    About the only way to get it done is a flock of small scrolls. Contact www.rae-corp.com in Pryor, OK. Ken Ken KE5DFR
  19. TXiceman

    Expired License

    Like noted....a few days or even a month could be s simple over-site, but 8 years is blatent and he must be reported. Ken Ken KE5DFR
  20. TXiceman

    Selecting a Glycol Makeup System

    It is not hard to use a simple dose tank to feed on the suction side of the pump. Pipe it up so that it can be isolated, and then pressurized with the pump discharge and push it in to the suction. You can pump or gravity fill the tank depending on the size. Just some pipe and valves. If you...

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