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Recent content by n8cole

  1. n8cole

    Is there a comprehensive chemical odor threshold database?

    Having references is important, but what I want is a large database of chemicals. For example, a while ago I need odor-threshold values for the carboxylic acid compounds that are prevalent in vegetable oil refining, palmitic acid, oleic acid, etc. But no database I looked at had these chemicals...
  2. n8cole

    Is there a comprehensive chemical odor threshold database?

    Specifically, I am looking for a database of the chemicals odor threshold - at what concentration is the chemical olfactorily undetectable. PubChem is good, and so is Cameo if the USCG CHRIS Code is published. But I am hoping for the existence of a much larger database. I understand that this...
  3. n8cole

    Is there a comprehensive chemical odor threshold database?

    I work in air pollution control and am occasionally responsible for designing equipment to neutralize odors. While I can often find the odor threshold of a target chemical using resources like CAMEO or various chemical databases, I’m looking for a more comprehensive and dedicated database that...
  4. n8cole

    What required specifications do fuel train manual shutoff valves (MSOV) need to have?

    I've been informed that under NFPA 86, a manual shut-off valve (MSOV) is required at the inlet of a fuel train. However, I'm unsure about the specific requirements for this valve. I assume it must be lockable to comply with lock-out/tag-out (LOTO) procedures and should be non-sparking for...
  5. n8cole

    Flue Gas Scrubber Design Database

    I am searching for a database of flue gas scrubber design parameters. Such as, common reagents to use for certain VOC compounds, L/G minimums, and Absorption Factors. I do not have access to programs that can model this data for me. If anyone knows of such a database and is willing to share it...
  6. n8cole

    How to determine the performance impact of sloped inlet duct on a centrifugal fan?

    I have found resources that explain the impact of a 95 deg elbow at the inlet and outlet of a centrifugal fan, but nothing else. I know a sloped inlet and/or a sloped outlet duct would cause a non-uniform velocity profile, which would cause performance losses. But I am hoping there is a way to...
  7. n8cole

    How does pressure drop work in parallel?

    I apologize for the confusion. I thought assigning made up values would help to clarify my question.
  8. n8cole

    How does pressure drop work in parallel?

    I created this post to help me better understand how to deal with pressure drop in parallel. Can you explain to me why I need to define a fictitious flow for this fictitious and extremely simplified example scenario?
  9. n8cole

    How does pressure drop work in parallel?

    You are right! But I knew this. Granted, my understanding of the relationship between flow and pressure could easily be used as an example of the Dunning-Kruger effect. I just find it easier to understand if I think of the suction as something consumed by the pressure drop. I know it is not...
  10. n8cole

    How does pressure drop work in parallel?

    Embarrassingly, after rereading your post for about 30 minutes, I finally got it. The way I now like to think about it is in terms of inlet and outlet pressures. The outlet pressure of both units 1 and 2 is created by the suction of the fan. This suction pressure exists in line 3 and therefore...
  11. n8cole

    How does pressure drop work in parallel?

    Assume any flow you want. What I want to know is does the fan need to be sized for 7"wc or 14"wc static pressure. This is ignoring that fact that I would need to know desired suction pressure at the inlet of unit 1 and 2, and the desired outlet pressure of the fan.
  12. n8cole

    Looking for an AI that will help me create a chemical functional group database

    I am a chemical engineer working on a spreadsheet that calculates heat capacity using the Joback method (see links below if you need more information on the Joback method). For this calculator, I am creating a database of chemical compounds and their functional groups, but it is taking too long...
  13. n8cole

    How does pressure drop work in parallel?

    Imagine you have two ducts (ducts 1 and 2) that merge into a single duct (duct 3). There is a fan located on duct 3 that needs to pull air through ducts 1, 2, and 3, and then exhaust it through duct 4. Both ducts 1 and 2 have obstructions that cause a pressure drop of 7 inches of water column...
  14. n8cole

    Looking for resources I can use to teach myself electrical wiring for process application engineering

    This is exactly what I was hoping for!
  15. n8cole

    Looking for resources I can use to teach myself electrical wiring for process application engineering

    You're probably right about me not knowing what I don't know, and I should have clarified more. I am not fully left to my own devices, as my supervisor is always there to answer any questions I have and look over my work. However, I want to be able to do some learning on my own time, so I was...
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