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  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...
  16. n8cole

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

    I am a chemical engineer fresh out of college and have landed myself a job as a project engineer. Part of my job is spec-ing and ordering electrical parts like actuators, VFDs, proximity switches (pressure and level switches too), etc. I lack a lot of the basic knowledge when it comes to...
  17. n8cole

    Searching for a "cheat sheet" that list catalyst and their known poisons

    Yes it does, thank you.
  18. n8cole

    Searching for a "cheat sheet" that list catalyst and their known poisons

    Ideally, I am searching for a table that list common catalyst (specifically for oxidizers) and their known poisons.
  19. n8cole

    Help with unit conversion

    Thank you
  20. n8cole

    Do Orifice Plate Flow Meters account for varying densities?

    There is a forced draft process blower between the tank and the oxidizer. The blower is what is controlling the flow, not the nitrogen.

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